CN102746867A - Method for preparing bio-oil by treating duckweed biomass by using hydrothermal method - Google Patents
Method for preparing bio-oil by treating duckweed biomass by using hydrothermal method Download PDFInfo
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Abstract
The invention relates to a new method for preparing bio-oil by treating duckweed biomass by using a hydrothermal method. The method is characterized by comprising the following steps of: (1) grinding dry duckweeds in a grinder to obtain fine duckweed particles; (2) weighing the treated duckweeds and putting the weighed duckweeds in a high-pressure reactor and adding water to react; and (3) extracting a mixture obtained through reaction by using organic solvents, separating and filtering extracts to obtain an organic phase, and carrying out rotary evaporation to remove the organic solvents, so as to obtain the bio-oil. The method for preparing the bio-oil with a duckweed biomass as a raw material has the beneficial effects that the raw material has high photosynthesis efficiency, strong adaptive capability to environment, short growth cycle, low energy consumption, little early-stage investment and low cost, is easy to cultivate in a large scale, does not occupy farmlands and relieves dependence on fossil fuel; besides, the high-moisture duckweeds do not need to be dried in a hydrothermal process, so that the energy consumption in early-stage treatment is low; and therefore, the method has good economic and social benefits.
Description
Technical field
The invention belongs to technical field of new energies, relate to a kind of hydrothermal method and handle the novel method that duckweed is produced bio oil.
Background technology
Along with the aggravation of petering out and using environmental pollution that fossil oil causes of fossil oil, it is extremely urgent to seek renewable, pollution-free alternative new forms of energy.In the middle of all renewable new forms of energy, biomass become the focus of falling over each other to study with plurality of advantages such as its high yield, low pollution, carbon dioxide zero discharge.Wherein, duckweed as a kind of important renewable biomass because of its photosynthetic efficiency is high, adaptive capacity to environment is strong, growth cycle is short, is easy to large-scale farming and with low cost, plurality of advantages such as do not occupy cultivated land, and receiving much attention day by day.Therefore, utilization of duckweed and transformation technology not only become the new direction of international new energy field, also become one of problem of lot of domestic and foreign scholar's research gradually simultaneously, and research focus mainly concentrates on the preparation field of duckweed bio oil fuel.But the extensive transformation of duckweed of traditional method prepares bio oil fuel faces two challenges greatly: the one, and the duckweed oleaginousness is low; The 2nd, must carry out dry and extraction oil content wherein to the high-moisture duckweed of results.So, have problems such as early investment is big, energy consumption is many, raw material availability is low, and many gordian techniquies remain to be broken through.Therefore, research and development duckweed bio oil fuel fabrication new way becomes the task of top priority.
Water is divided into subcritical water (temperature is in 150-374 ℃, pressure and is in 0.4-22.1MPa) and supercritical water (temperature is higher than 374 ℃, and pressure is higher than 22.1MPa) according to temperature and pressure scope difference of living in.The two has characteristics such as inexpensive, nontoxic, good mass transfer, heat transfer concurrently, is a kind of environmental friendliness medium.Compare with room temperature water, in ultra (Asia) critical water, carry out chemical reaction and have following characteristics: 1) can dissolve each other, become traditional heterogeneous reaction and be homogeneous reaction, increase speed of reaction with most of organism and gas; 2) temperature of reaction of some pyroreaction be can reduce, product selectivity and yield improved simultaneously; 3) less temperature and pressure changes the best combination that can realize having concurrently simultaneously fluid density and gas mass-transfer performance; 4) product separates simply, only needs decrease temperature and pressure just can realize separating of product and water, saves separation costs.Therefore, adopting ultra (Asia) critical water treatment duckweed to prepare bio oil fuel has a good application prospect.
It is raw material that the hydrothermal method of duckweed is handled with the high-moisture duckweed, is reaction medium with Asia/supercritical water, produces the duckweed bio oil through pyrolysis liquefaction.Through the duckweed hydrothermal treatment consists, not only can the grease in the duckweed be transformed, and glucide wherein and protein etc. also can transform in the lump.Therefore, no matter its oleaginousness height all can adopt hydrothermal method to transform to duckweed, has overcome the big barrier of two in the traditional method effectively.
Hydrothermal method is handled duckweed and is prepared in the research of bio oil, temperature, reaction times, material addition and whether catalyzer is all influential for the output and the quality of oil.Discover, compare that hydrothermal method is handled all higher [document: Xiu S.N. of bio oil productive rate, hydrocarbon content and calorific value that transformation of duckweed obtains with fast pyrogenation; Shahbazi A., Croonenberghs J., Wang L.J.:Oil Production from Duckweed by Thermochemica lLiquefaction; Energy Sources, Part A:Recovery, Utilization; And Environmental Effects, 2010,32:1293-1300].Domesticly only limit to the fermentative prepn alcohol product for the duckweed biomass at present in the utilization aspect the new forms of energy, Chinese patent [publication number CN102277389A] discloses and has utilized duckweed to carry out biological fermentation to produce the alcoholic acid method.Chinese patent [publication number CN102220386A] discloses a kind of method of utilizing duckweed to carry out microbial fermentation production butanols.And at present be with the duckweed raw material pass through hydrothermal method process for producing bio oil report seldom, correlative study is deficient.The present invention utilizes the duckweed biomass, handles obtaining the bio oil product with hydrothermal method, is expected further to promote application and the development of duckweed biomass on the bio oil industry.
Summary of the invention
Therefore, the objective of the invention is to set up a kind of novel method for preparing bio oil, in order to realize above purpose, the present invention adopts following technical scheme.
One aspect of the present invention relates to a kind of hydrothermal method and handles the method that the duckweed biomass prepare bio oil, it is characterized in that comprising the steps:
(1), the exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle;
(2), take by weighing the duckweed of handling well and place autoclave, add water, add or do not add catalyzer; Sealing is put into autoclave in the melting salt, and controlled temperature is at 270-380 ℃; Time length is 10-120min, and reaction finishes postcooling, opens reaction kettle; Collect gained mixture in the reaction kettle, described catalyzer is selected from salt of wormwood and/or yellow soda ash;
(3), with organic solvent mixture is extracted and extracting; Separate and filter and obtain organic phase; Revolve to steam and remove organic solvent and obtain bio oil, also generate with gas with other by products such as solid residue in the reaction, the calculation of yield formula of all products is distinguished as follows: oily productive rate (%)=(m
Oil÷ m
Raw material) * 100%, dregs productive rate (%)=(m
Dregs÷ m
Raw material) * 100%, gas yield (%)=(m
Gas÷ m
Former Material) * 100%.
(4) the gained bio oil is used gas chromatography-mass spectrum, and technology such as ultimate analysis are carried out analysis and characterization.
In a preferred implementation of the present invention, it is characterized in that: it is the 80-120 order that described duckweed is pulverized back particulate median size.
3, handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method; It is characterized in that: described catalyzer is salt of wormwood and/or yellow soda ash; Its consumption is preferably the 1-50% of duckweed dry weight, further is preferably 3-15%, further is preferably 5-15%.
In a preferred implementation of the present invention, it is characterized in that: the described organic solvent that is used to extract is methylene dichloride, chloroform, benzene, ethylene dichloride, Virahol, ETHYLE ACETATE and ether etc.
In a preferred implementation of the present invention, it is characterized in that: do not add catalyzer, the time length is 10-60min.
In a preferred implementation of the present invention, it is characterized in that: described organic solvent is reusable after recycling.
In a preferred implementation of the present invention, it is characterized in that: described treatment temp is preferably 290-350 ℃, is preferably 330-350 ℃.
In a preferred implementation of the present invention, it is characterized in that: described catalyzer is a salt of wormwood, and service temperature is 340-360 ℃, and the time length is 20-40min.
In a preferred implementation of the present invention, it is characterized in that: described bio oil productive rate 18.2%, it is as follows elementary composition: carbon: 71.5%; Hydrogen: 7.9%, oxygen: 15.5%, nitrogen: 4.6%; Sulphur: 0.5%, ash content: 0.5%, calorific value: 32.8MJ/kg.
The present invention have at least the advantage that is described below one or more or all:
Duckweed is a kind of waterplant, contains higher moisture, adopts the pyrolytic method to consume lot of energy for dried feed.And hydro-thermal liquefaction drying-free, through making bio oil with the thermalization of water direct heating, the significant amount of energy of so just saving.
Because duckweed is a waterplant, therefore land occupation can not strive the place of production with grain.Duckweed growth is rapid, and survival is fit to propagate artificially on a large scale easily.And duckweed is a kind of water purifier of cheapness, can absorb the heavy metal contaminants in the water body, helps the improvement of water pollution.
Organic solvent used in the process of the present invention is recyclable, recycles.
The present invention utilizes sufficient resources water as reaction medium, toxicological harmless, environmental protection and practiced thrift cost.
Embodiment
Embodiment 1
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 16.9ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 270 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 5.4%.
Embodiment 2
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 15.1ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 290 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 9.7%.
Embodiment 3
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 14.1ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 310 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 12.0%.
Embodiment 4
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 12.9ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 330 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 11.7%.
Embodiment 5
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 12.1ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 340 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 13.0%.
Embodiment 6
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 17.5%.
Embodiment 7
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 9.85ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 360 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 16.1%.
Embodiment 8
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 8.4ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 370 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 15.8%.
Embodiment 9
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 8ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 380 ℃, and the time length is 60min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 16.2%.
According to embodiment 1-9, obtain each components contents that obtains under differing temps, as shown in table 1.
The influence that table 1 temperature distributes to each component
Embodiment 10
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 10min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.Extract with organic solvent reaction gained mixture, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 15.1%.
Embodiment 11
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 20min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent mixture is extracted and extracting, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 17.5%.
Embodiment 12
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 18.2%.
Embodiment 13
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 40min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 17.3%.
Embodiment 14
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 50min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 17.4%.
Embodiment 15
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 120min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 17.4%.
According to embodiment 10-15, obtain each components contents that obtains under the differential responses time, as shown in table 2.
The influence that table 2 time distributes to each component
Embodiment 16
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 0.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 12.6%.
Embodiment 17
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 1.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.Extract mixing reaction gained mixture with organic solvent, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 13.3%.
Embodiment 18
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 3.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 19.8%.
Embodiment 19
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 4.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 19.6%.
Embodiment 20
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 5.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, catalyst-free, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 19.6%.
According to embodiment 16-20, obtain each components contents that obtains under differential responses material addition, as shown in table 3.
The influence that table 3 material addition distributes to each component
Embodiment 21
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, add catalyzer carbonic acid potassium 5%, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 13.7%.
Embodiment 22
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, add catalyzer carbonic acid potassium 10%, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 13.3%.
Embodiment 23
The exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle.Take by weighing the duckweed 2.5g that handles well, in the autoclave as for 25ml, add water 11.3ml, add catalyzer carbonic acid potassium 50%, sealing.Autoclave is put in the melting salt, and controlled temperature is at 350 ℃, and the time length is 30min.Reaction finishes the back and uses water cooling rapidly, opens reaction kettle, collects mixture in the reaction kettle.With organic solvent reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, the bio oil productive rate is 3.6%.
According to embodiment 21-23, obtain each components contents when having catalyzer to exist, as shown in table 4.
The influence that table 4 catalyzer addition distributes to each component
The gained oil prodn is carried out check and analysis, and it is as shown in table 5 to obtain C in the oil product, H, N, S, O content and calorific value.
Table 5 differential responses condition is elementary composition and calorific value influence to bio oil
Shown in table, can know that along with the rising of temperature, the content of C is in continuous increase, temperature is little for the content influence of H.The content of O raises with temperature and reduces, and compares with raw material to occur significantly descending, and calorific value raises, and N and S content also rise with temperature and descends.The influence of time for the liquefaction oil product is the content increase of C, H, S, and N and O descend to some extent.Yet no matter compare with raw material, be the temperature time, and the content of N obviously raises, though O content descends.
When being understood that; Specific embodiment of the present invention only is a property illustrative purposes presented for purpose of illustration; It limits protection scope of the present invention never in any form; Those skilled in the art can improve or conversion according to above-mentioned explanation, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention.
Claims (11)
1. a hydrothermal method is handled the method that the duckweed biomass prepare bio oil, it is characterized in that comprising the steps:
(1), the exsiccant duckweed is pulverized in kibbler, obtain the duckweed fine particle;
(2), take by weighing the duckweed of handling well and place autoclave, add water, add or do not add catalyzer; Sealing is put into autoclave in the melting salt, and controlled temperature is at 270-380 ℃; Time length is 10-120min, and reaction finishes postcooling, opens reaction kettle; Collect mixture in the reaction kettle, described catalyzer is selected from salt of wormwood and/or yellow soda ash;
(3), reaction gained mixture is extracted, separate and filter obtaining organic phase, revolve to steam and remove organic solvent and obtain bio oil, described organic solvent is low polar solvent preferably with organic solvent.
(4) bio oil is the brownish black thick liquid, productive rate 1-20%, and the elementary composition scope of gained bio oil is following under all reaction conditionss: carbon: 60.0-80%; Hydrogen: 6.0-9.0%; Oxygen: 20-8%, nitrogen: 6.0-2.0%, sulphur: 0.1-1.5%; Ash oontent: 0.5-1.0%, calorific value: 27.0-40.0MJ/kg.
2. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method, it is characterized in that: all duckweed kinds like many duckweeds, few root duckweed, duckweed, wolffia arrhiza, flat unrooted duckweed, all are suitable for.
3. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method, it is characterized in that it is the 80-120 order that described duckweed is pulverized back particulate median size.
4. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method; It is characterized in that: described catalyzer is salt of wormwood and/or yellow soda ash; Its consumption is preferably the 1-50% of duckweed dry weight, further is preferably 3-15%, further is preferably 5-15%.
5. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method, it is characterized in that: the described organic solvent that is used to extract is methylene dichloride, chloroform, benzene, ethylene dichloride, Virahol, ETHYLE ACETATE and ether etc.
6. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method, it is characterized in that: do not add catalyzer, the time length is 10-60min.
7. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method, it is characterized in that: described organic solvent is reusable after reclaiming simple process.
8. handle the method that the duckweed biomass prepare bio oil according to claims 5 described hydrothermal methods, it is characterized in that: described treatment temp is preferably 290-350 ℃, is preferably 330-350 ℃.
9. handle the method that the duckweed biomass prepare bio oil according to claims 3 described hydrothermal methods, it is characterized in that: described catalyzer is a salt of wormwood, and service temperature is 340-360 ℃, and the time length is 20-40min.
10. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method, it is characterized in that: the productive rate of gained bio oil is 3.6-18.2%.
11. handle the method that the duckweed biomass prepare bio oil according to claims 1 described hydrothermal method, it is characterized in that: bio oil is elementary composition, carbon: 70.0-75.7%; Hydrogen: 7.8-8.6%; Oxygen: 16.8-11.7%, nitrogen: 4.8-3.1%, sulphur: 0.3-1.0%; Ash oontent: 0.5%, calorific value: 32.3-35.8MJ/kg.
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| CN103265967A (en) * | 2013-05-03 | 2013-08-28 | 浙江大学 | Method for preparing bio-oil by liquefying biomass by high efficiency hydro-thermal method |
| CN103756711A (en) * | 2014-01-02 | 2014-04-30 | 河南理工大学 | Method for preparing green diesel oil through treating microalgae by using three-step hydrothermal method |
| CN113943602A (en) * | 2021-09-30 | 2022-01-18 | 天津大学 | Method for preparing hydrocarbon-rich bio-oil by using heavy metal super-accumulation plant sedum alfredii biomass |
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| CN1687315A (en) * | 2005-04-19 | 2005-10-26 | 华东理工大学 | Supercritical liquefaction method for biomass |
| CN101787300A (en) * | 2010-03-26 | 2010-07-28 | 聊城大学 | Method for preparing fuel with alga and/or hydrophyte as raw materials |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687315A (en) * | 2005-04-19 | 2005-10-26 | 华东理工大学 | Supercritical liquefaction method for biomass |
| CN101787300A (en) * | 2010-03-26 | 2010-07-28 | 聊城大学 | Method for preparing fuel with alga and/or hydrophyte as raw materials |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059895A (en) * | 2012-12-07 | 2013-04-24 | 河南理工大学 | Method for preparing bio-oil through hydrothermal liquefaction of enteromorpha clathrata |
| CN103059895B (en) * | 2012-12-07 | 2015-07-22 | 河南理工大学 | Method for preparing bio-oil through hydrothermal liquefaction of enteromorpha clathrata |
| CN103030710A (en) * | 2013-01-05 | 2013-04-10 | 广西大学 | Resource utilization method of camellia oleifera shells |
| CN103030710B (en) * | 2013-01-05 | 2015-03-18 | 广西大学 | Resource utilization method of camellia oleifera shells |
| CN103265967A (en) * | 2013-05-03 | 2013-08-28 | 浙江大学 | Method for preparing bio-oil by liquefying biomass by high efficiency hydro-thermal method |
| CN103265967B (en) * | 2013-05-03 | 2015-04-15 | 浙江大学 | Method for preparing bio-oil by liquefying biomass by high efficiency hydro-thermal method |
| CN103756711A (en) * | 2014-01-02 | 2014-04-30 | 河南理工大学 | Method for preparing green diesel oil through treating microalgae by using three-step hydrothermal method |
| CN103756711B (en) * | 2014-01-02 | 2015-06-03 | 河南理工大学 | Method for preparing green diesel oil through treating microalgae by using three-step hydrothermal method |
| CN113943602A (en) * | 2021-09-30 | 2022-01-18 | 天津大学 | Method for preparing hydrocarbon-rich bio-oil by using heavy metal super-accumulation plant sedum alfredii biomass |
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