CN106841484B - A kind of temperature programming control method for gas chromatography separation - Google Patents
A kind of temperature programming control method for gas chromatography separation Download PDFInfo
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- CN106841484B CN106841484B CN201710081529.4A CN201710081529A CN106841484B CN 106841484 B CN106841484 B CN 106841484B CN 201710081529 A CN201710081529 A CN 201710081529A CN 106841484 B CN106841484 B CN 106841484B
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- splitter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
- G01N2030/3007—Control of physical parameters of the fluid carrier of temperature same temperature for whole column
Abstract
The invention discloses a kind of temperature programming control methods for gas chromatography separation, are heated using intermediate frequency coil to raw material column and/or splitter.Gas-chromatography separated heating temperature program of the invention carries out contactless heating using intermediate frequency coil, and heating temperature field is stable and is averaged, substantially without thermal (temperature difference) stress；In conjunction with temperature programming, realization directly heats the palladium inside splitter, for promoting gas-chromatography separation to have good facilitation.
Description
Technical field
The present invention relates to a kind of temprature control method, in particular to a kind of temperature programming control for gas chromatography separation
Method processed belongs to the temprature control method during technical field of chromatography separation, especially hydrogen isotope separation.
Background technique
In the prior art, for thermonuclear fusion research application raw material deuterium, tritium research and analyse it is more, but mainly relate to
And researching and analysing in terms of pure science, the source preparation purifying research of the raw material used especially for thermonuclear fusion reaction compared with
It is few.It is known hydrogen isotope to be carried out to isolate and purify research using some adsorption chromatography methods, wherein again with cryogenic absorption color
It is most potential to compose separation method.
It is wherein most potential with the application of palladium displcement chromatography separation, it can realize in lower cost for hydrogen isotope
Separation and concentration.The separation of palladium displcement chromatography because belonging to the displacement separation of metal soluble solids, wherein adsorption and desorption
Condition differs greatly, during especially desorption releases hydrogen from palladium metal, it usually needs Metal Palladium is heated,
Desorption is completed under conditions of up to 300 DEG C.
Existing hydrogen separation, the occasion purified need to carry the materials such as palladium aluminium oxide using a large amount of molecular sieves.Lead to when in use
Often these materials are filled in stainless steel tube, the hydrogen release temperature for carrying palladium aluminium oxide is very high, needs to be heated in experiment
To 300 DEG C, existing heating means mainly use electric furnace to be heated.
Currently existing scheme there are problems that many deficiency and, mainly have the following aspects:
1. electric furnace heating generates adsorbing metal palladium effect of the high temperature to heating, it can also cause to load Metal Palladium
Container generates biggish thermal (temperature difference) stress, so that the mechanical degradation of container.
2. electric furnace heats the limitation due to structure size, lead to splitter there are the apparent temperature difference, cause container material and
The interaction of adsorbent material, especially temperature gradient there are the case where, external container performance deterioration it is fairly obvious.
3. circuit generates most of hot because the architectural difference of electric furnace and splitter is larger so that during heating
Amount loss, so that heating isolated environment becomes to deteriorate, also limits the application implementation of palladium displacement separation method in air.
If be not controlled external atmosphere in heating process, it is likely to that air penetration is caused to pollute, serious shadow
Ring isolated efficiency.
4. electric furnace heats splitter, the temperature of its own is significantly larger than the temperature on splitter, as high temperature source
Easily cause other security risks.And when carrying out temperature adjusting, once temperature change is very fast, temperature distributing disproportionation is more
Obviously.
5. existing heating method is limited for the temperature regulating power in heating process, it is difficult to accurate control reaction
Temperature change cannot realize the control of the transformation efficiency for reaction well.
Summary of the invention
It is an object of the invention to overcome in gas chromatography separation method in the prior art in temperature programming control process
The deficiencies of there are temperature unevenness, thermal (temperature difference) stress, provides a kind of temperature programming control system for gas chromatography separation.
The method of the present invention in order to overcome the problems, such as that temperature is uneven during heating rod adjusts temperature, using intermediate frequency coil plus
Heat installs Medium frequency induction coil in the top half of raw material column/splitter container containing, when helix tube is lifted out liquid nitrogen liquid level
Afterwards, vortex electric heating is manufactured using intermediate frequency coil, realizes that raw material column/splitter is evenly heated.Also, the Medium frequency induction of design
Coil can be adjusted with real-time perfoming temperature, temperature adjust during face is raw material column/splitter entirety, control
Although process very simple, it can effectively realize that accurate, stable temperature is adjusted.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of temperature programming control method for gas chromatography separation to raw material column and/or is divided using intermediate frequency coil
Heated from column.
The gas-chromatography separating mechanism temperature programming control method being designed in this way, splitter are heated liter in intermediate frequency coil
Temperature, heating control process has continuity, and the part heating consistency of intermediate frequency coil heating is good, can be realized for dividing
The continuous column plate control of formation from the hydrogen inside column, especially in the heating control of higher temperature, the temperature of splitter
Raising is rapidly, continuously, controllably, can effectively to promote the separative efficiency of hydrogen isotope.
The intermediate frequency coil that the present invention designs generates powerful alternating magnetic field under the action of voltage of intermediate frequency, electric current, this magnetic field
Raw material column/splitter metal material part in burner hearth is set to generate vortex and generate heat, heating temperature field is stable and is averaged, substantially
There is no thermal (temperature difference) stress, and there is direct heating effect for the Metal Palladium in palladium displacement separation, may be implemented for splitter
Internal palladium directly heats, and isolated effect is good.Moreover, temperature gradient explained when external heating, Ke Yishi is substantially not present
Now accurate temperature adjusts control.
Further, raw material column and/or splitter are designed to helix, the matching intermediate frequency line that size is adapted therewith
Circle.Spiral helicine raw material column and/or splitter can preferably be mutually matched with intermediate frequency coil, can more fully utilize
The alternating magnetic field that frequency coil generates carries out heating separation.Because the structure of intermediate frequency coil is generally exactly spiral helicine, corresponding general
The structure that raw material column and/or splitter are designed like is more convenient the lifting work such as splitter, so that splitter is in intermediate frequency coil
In arrangement be easier, be conducive to the amplification of industrialized scale.Moreover, when raw material column and/or splitter lifting are sling,
Raw material column and/or the splitter continuous dislocation in intermediate frequency coil may be implemented and change continuous controllable, realization laser heating temperature
Variation control.
Further, the screw diameter for the helical tubular structure that raw material column/splitter is constituted is the straight of intermediate frequency coil
The 40-90% of diameter, percentage that raw material column/splitter helical structure occupies in intermediate frequency coil be suitable for, when intermediate frequency coil plus
The alternating magnetic field generated when hot is sufficiently received by raw material column/splitter, the heat being converted on raw material column/splitter, real
Existing efficient heat effect.It is preferred that raw material column/splitter diameter reaches the 60-90% of intermediate frequency coil, under such ratio, in
The alternating magnetic field that frequency coil generates can more fully be absorbed.
Further, intermediate frequency coil is arranged in container containing, and intermediate frequency coil (also referred to as Medium frequency induction coil) is mounted on splendid attire
The top half of container, the lower half portion of container containing are liquid nitrogen tanks.Preferably, liquid nitrogen tank is connected with for recycling liquid nitrogen outflow
Conduit can be flowed out by corresponding conduit after the completion of liquid nitrogen is for the freezing of raw material column/splitter, for liquid nitrogen into
Row transfer recycling.In view of acting on for raw material column/splitter heating in medium frequency, the top of container containing generates a large amount of heat
Amount needs in advance to export the liquid nitrogen for being used to freeze, avoids interference of the liquid nitrogen gasification for heating process.
Continuously combined in the frozen cooling of liquid nitrogen tank and the heating position of intermediate frequency coil, can quickly be realized de-
Chaotropic nitrogen cooling treatment, it is efficiently quick then into having the characteristics that in medium-frequency heating coil.
Further, raw material column/splitter is arranged in liquid nitrogen tank, and helical tubular structure is connected with hoisting mechanism,
Raw material column/splitter can be lifted in intermediate frequency coil from liquid nitrogen tank by hoisting mechanism.Obviously, the raw material of helix
The overall screw diameter of column/splitter is less than the diameter of liquid nitrogen tank, it is ensured that raw material column/splitter can be totally submerged molten in liquid nitrogen
In liquid.
Preferably, hoisting mechanism carries out promotion processing using stepper motor, and stepper motor can be accurate during promotion
Control promoted speed and height so that lifting process Central Plains stock column/splitter enters area/volume in intermediate frequency coil
Controllably, so can be very good realize local heating control, for chromatography centrifugation have good facilitation.
Further, during heating control, raw material column/splitter of helix is lifted into intermediate frequency coil, is controlled
Power supply processed makes intermediate frequency coil excite alternating magnetic field, so that vortex current is generated on raw material column and/or splitter, to helix tube
The raw material column and/or splitter of shape are heated.
Further, while intermediate frequency coil heats, the height of adjustment lifting raw material column and/or splitter, feed change column/
The overlap proportion of splitter and intermediate frequency coil, i.e. raw material column/splitter enter the depth in intermediate frequency coil.By raw material column/
Big variation occurs for the height of splitter, the flux for the alternating magnetic field that it can be made to receive.
Further, raw material column/splitter end can be convenient the end in lifting process using socket hose
Bending control, because raw material column/splitter is all the coil arrangement of hard material, needs to keep pipeline when being promoted
The continuous modification of leakproofness and pipeline, it is possible to socket hose be selected to realize the continuous control for promoting its leakproofness and continuous
Connection.
Further, the use 100-1000Hz intermediate frequency power supply of the intermediate frequency coil is as power supply.Preferably, in described
Frequency coil uses 100-500Hz intermediate frequency power supply as power supply, original of the lower frequency for the spiral tube structure of heating
The heating uniformity of the palladium displacement material in heating tube is more conducive to when stock column/splitter.
Further, intermediate frequency coil selects the intermediate frequency power supply of 500w-5kw to be heated.Preferably, intermediate frequency coil is selected
The intermediate frequency power supply of 500w-3kw is heated.
Further, contactless temperature sensor is provided at the top of container containing, it is long-range to monitor raw material column/separation
The temperature conditions of column is controlled adjustment for the heating intensity of intermediate frequency coil accordingly.
Further, the material filled in splitter is Pd/Al2O3Separation material, it is high for the separative efficiency of material, point
It is good from effect.Wherein, Pd/Al2O3The weight percent of Metal Palladium is 10%-45% in material, according to actual mask work needs
The weight percent for designing corresponding Metal Palladium improves the working efficiency of Metal Palladium, improves separating effect.Preferably, metal
The percent mass ratio of palladium is 20-35%.
Further, it is preferred that the power supply is the adjustable power supply of voltage and or current.
Compared with prior art, beneficial effects of the present invention:
1. gas-chromatography separated heating temperature program of the invention carries out contactless heating using intermediate frequency coil, hair
High temperature field is stable and is averaged, substantially without thermal (temperature difference) stress.
2. gas-chromatography separated heating temperature program of the invention, in palladium displacement separation during heating
Metal Palladium has direct heating effect, and the palladium inside for splitter may be implemented and directly heat, for promoting gas-chromatography point
From with good facilitation.
3. reducing the temperature ladder of raw material column/splitter external metallization the invention avoids the variation issue in temperature field
Situation of change, the opposite temperature for improving exterior material are spent, so that the temperature of closed material is relatively low, is had preferably close
Feng Xing.
4. frozen cooling and heating position relatively continuous and compact, reduce the transfer work of material in the present invention, can
It is detached from liquid nitrogen cooling treatment with quick realization, it is efficiently quick then into having the characteristics that in medium-frequency heating coil.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1
Prepare hydrogen isotope separating device
Using 1.7 meters of container containing of diameter, a liquid nitrogen tank is arranged in container containing, the inside is full of liquid nitrogen.Arrangement
Intermediate frequency coil, intermediate frequency power supply in connection are used for subsequent separated heating.
The rod-shaped splitter of heating in medium frequency (1.2 meters)
Firstly, preparing the device of gas-chromatography separation hydrogen isotope, the Pd/Al containing 30wt% Metal Palladium is used2O3Filling
Material is filled in steel pipe, and 1.2 meters of packed column is prepared, and packed column uses 316 stainless steel materials, designs internal diameter 12mm,
Adsorb the hydrogen (D abundance: 150ppm) containing natural abundance deuterium of 1bar.Under liquid nitrogen cooling effect, the absorption of hydrogen is completed
Effect.After the completion of absorption, above-mentioned stainless steel splitter is shifted and is detached from liquid nitrogen solution, is sent in intermediate frequency coil, in utilization
Frequency coil is heated, and drives the hydrogen components in splitter during heating from bottom to top (from bottom to top with 2cm/
The speed of min lifts splitter, pays attention to keeping splitter vertical with the section of intermediate frequency coil), it will be separated at the top of splitter
Hydrogen be transported in hydrogen oxygen recombination device and be oxidized to water, the isotopic content ratio in moisture is then tested and analyzed using mass spectrograph
Situation of change determines the optimal opportunity for collecting discharge hydrogen.
Heating in medium frequency separates helical form splitter (30 meters)
Using the Pd/Al of 30wt% Metal Palladium2O3Packing material (absorption displacement hydrogen isotope) is filled in internal diameter 12mm not
It becomes rusty in steel, 1.5 meters of diameter of helicoidal structure is made using bending machine bending for filled stainless-steel pipe, and volute design is total
Length is 45 meters, and the control of helix tube height is 1.2 meters.Hydrogen isotope separation test, liquid nitrogen are carried out using above-mentioned identical parameter
It is cooling, it is passed through the natural hydrogen of 1bar, after the completion of absorption, is transferred in intermediate frequency coil, the size of the intermediate frequency coil used is greater than
The diameter of helix tube, the mode of unconventional lifting make helix tube complete corresponding heating work by intermediate frequency coil, and pull rate is same
Sample control is consistent with rod-shaped splitter pull rate in 2cm/min.For the hydrogen that is discharged at the top of splitter by hydrogen oxygen recombination device
It is converted into water, deuterium content therein is analyzed using the sampling Detection of simpleness, determines the optimal opportunity for collecting discharge hydrogen.
Intermediate frequency coil generates powerful magnetic field under the action of voltage of intermediate frequency, electric current, makes the raw material being located in intermediate frequency coil
Column/splitter metal material part generates vortex and generates heat, and heating temperature field is stable and is averaged, substantially without thermal (temperature difference) stress.
Using Pd/Al2O3It is adsorbed, then the object heated mainly includes Metal Palladium, while if selecting the raw material of metal material
Column/splitter shell, can also equally heat.Due to the uniformity feature of Distribution of Magnetic Field, may be implemented during heating
Comprehensive uniform heat effect, and can be realized when needed by adjusting voltage, electric current, frequency of intermediate frequency power supply etc.
Temperature adjustment control, the heated situation of palladium inside splitter is good, might as well for the separating effect of natural hydrogen.Electromagnetic heating
During, temperature gradient difference is substantially not present, it is fabulous to adjust control effect for the accuracy of temperature.
Embodiment 2
The power of intermediate frequency coil, frequency are for isolated influence
Using the Pd/Al of the 30wt% Metal Palladium prepared in embodiment 12O3Packing material, 45 meters long 12mm stainless-steel pipe,
The helical form splitter of 1.5 meters of manufactured diameter.Adjust intermediate frequency coil connection power supply control intermediate frequency coil exciting power and
Frequency changes intermediate frequency coil for the heat effect change intensity of splitter, analyzes the heating effect of wherein different intermediate frequency coils
Rate.
First splitter is immersed in liquid nitrogen tank, using liquid nitrogen refrigerated separation column, its temperature is made to be reduced to the temperature of liquid nitrogen.So
It is passed through natural hydrogen (deuterium content: 150ppm) in backward splitter, so that natural hydrogen adsorption is into splitter.To hydrogen adsorption
After sufficiently, liquid nitrogen drainage recycling is stored by the conduit of liquid nitrogen trench bottom.Then by being connected on splitter
Hoisting mechanism slings splitter, is delivered to the position of intermediate frequency coil, is heated using intermediate frequency coil to raw material column/splitter
Processing, makes its temperature to separation temperature.Such as select Pd/Al2O3Filler material for hydrogen desorption temperature be 300 DEG C, need
Temperature is gradually heated to 300 DEG C or so using intermediate frequency coil, then hydrogen desorption, according to the different desorption of isotope
Speed, realize separation and concentration effect.The driving part of above-mentioned hoisting mechanism is stepper motor, accurate to control splitter lifting
Speed is 2cm/min.During promotion, splitter is slowly entered in intermediate frequency coil, first realizes the control of local heating, so
It is continuous afterwards to change height, the successively heat treatment of splitter is completed, the selectivity of chromatography separation is promoted, separative efficiency improves.
During test, intermediate frequency coil power realized within the scope of 500w-5kw it is adjustable, for the frequency of intermediate frequency power supply
Rate is equally realized within the scope of 100-1000Hz adjustable.
Test result shows that splitter is for hydrogen when selecting different heating power and frequency in separation process
The case where separating effect of isotope reaches is to will appear certain fluctuation, specifically, being higher than when heating frequency is too high
After 500Hz, there is apparent deterioration in heating effect, and deuterium content is insufficient in isolated hydrogen, when the function of heating
When rate is lower than 1000 W, heat effect is lacking, and the hydrogen isotope adsorbed in splitter is difficult to realize exchange separation.When
It is too fast since temperature raises when heating power is greater than 3000 W, it is bad to also result in separating effect.Although IF frequency mentions
Height can be coordinated by increasing power, but still remain the bad problem of heating effect, and for separation, there are unfavorable
It influences, and then the inconsistency that separating energy consumption increases but separative efficiency declines occurs.It is preferred that using the intermediate frequency power supply of 500-3000W
Heating, preferably control intermediate frequency coil frequency 100-500Hz.It is then also possible to the use 100 of further preferably intermediate frequency coil,
200, for 300 or 400Hz intermediate frequency power supply as power supply, the heating for being more conducive to the palladium displacement material in heating tube is uniform
Property.
Embodiment 3
Intermediate frequency coil cooperates pull rate for isolated influence
It can be seen that frequency is in the intermediate frequency power supply driving of 200 Hz when selecting 1500 W by the result of above-described embodiment 2
When frequency coil is heated, separating effect is best.In order to further optimize the efficiency of separation, different lifting speed is controlled
The heating state of degree and intermediate frequency coil cooperates, and optimization improves separative efficiency.Specific control pull rate is in 0.5-10cm/
Consecutive variations in the range of min are oxidized to water, then utilize mass spectrum using the hydrogen of hydrogen oxygen recombination device sampling splitter discharge
Instrument is tested and analyzed.
It is mutually matched application in the case where heating in medium frequency by the pull rate for controlling different, has researched and analysed different controls
For the influence of gas-chromatography separative efficiency under parameter processed.When pull rate is greater than 5 cm/min, due to the residence time
It is shorter, the fast speed of hydrogen is driven, fails sufficiently to exchange separation and concentration, the isotopic content degree of enrichment in gained hydrogen is not
It is good.When pull rate is less than 1.5 cm/min, since pull rate is more slow, when splitter stops in intermediate frequency coil
Between it is longer, heating temperature increase it is larger, the warm-up movement of hydrogen isotope is too strong, and separation material is anti-for the separative efficiency of hydrogen isotope
And it loses.It is preferred, therefore, that splitter pull rate is 1.5-5cm/min, more preferable 1.5-3.5cm/min.
Further, raw material column/splitter end is connected on subsequent collection/detection part by being socketed hose,
During raw material column/splitter is promoted, socket hose keeps the leakproofness of pipeline and the continuous modification of pipeline.
Further, a contactless temperature sensor is installed, the temperature variations on control detection splitter are led to
The temperature variations on monitoring splitter are crossed, mentioning for the heating power of intermediate frequency coil, frequency and splitter is preferably controlled
The factors such as pulling rate degree, adjustment separative efficiency reach better level.Preferably, temperature sensing is set in the top of intermediate frequency coil
Device, monitoring temperature variation.Contactless temperature sensor is provided at the top of container containing, long-range monitoring raw material column/point
Temperature conditions from column is controlled adjustment for the heating intensity of intermediate frequency coil accordingly.
Embodiment 4
The procedural control design case of intermediate frequency coil heating
The separation of hydrogen isotope gas-chromatography, the splitter of selection are carried out using the optimal procedure parameters that above-described embodiment determines
The Pd/Al of the stainless-steel pipe filling 30wt%30wt% Metal Palladium of 45 meters long 12mm internal diameter2O3Adsorbent material.In container containing
It is cooled down in liquid nitrogen tank with liquid nitrogen, immersing in liquid nitrogen splitter realizes fast cooling.When the temperature of material is reduced to the temperature of liquid nitrogen
After degree, it is passed through natural hydrogen into splitter, is passed through hydrogen gas pressure 1bar, after column to be separated sufficiently adsorbs hydrogen, by liquid
Liquid nitrogen in nitrogen slot is transported in holding vessel.Then, splitter is lifted using stepper motor, makes it through intermediate frequency coil, connected
The power supply of intermediate frequency coil heats splitter.
Temperature program after specific design optimization is as follows, first by the natural hydrogen of splitter adsorption saturation, is then shifted
Into intermediate frequency coil, when heating for the first time, using 800w, the intermediate frequency power supply of 200Hz is heated, and keeps splitter pull rate
For 2.5cm/min, when heating for the first time, heating temperature is lower, so that the protium preferable separate in natural hydrogen is sloughed, then carries out
Second of heating, 1500w, 200Hz heating, the control of splitter pull rate is 2cm/min, when heating separation second
Tail gas measuring analysis is carried out, the hydrogen oxygen recombination device applied in analytic process, by oxidation of hydrogen Cheng Shui, spectrometer analysis moisture clock
Ingredient, the content ratio of the hydrogen isotope of the gas after determining separation, optimization separation parameter control situation.
Claims (10)
1. a kind of temperature programming control method for gas chromatography separation, is designed to spiral for raw material column and/or splitter
Tubulose manufactures vortex electric heating using intermediate frequency coil, heats to raw material column and/or splitter.
2. the temperature programming control method for gas chromatography separation as described in claim 1, which is characterized in that by raw material column
And/or the splitter matching intermediate frequency coil that size is adapted therewith.
3. the temperature programming control method for gas chromatography separation as described in claim 1, which is characterized in that the original
The screw diameter for the helical tubular structure that stock column/splitter is constituted is the 40-90% of the diameter of intermediate frequency coil.
4. the temperature programming control method for gas chromatography separation as described in claim 1, which is characterized in that intermediate frequency coil
It is arranged in container containing, intermediate frequency coil is mounted on the top half of container containing, and the lower half portion of container containing is liquid nitrogen tank.
5. the temperature programming control method for gas chromatography separation as claimed in claim 4, which is characterized in that raw material column
And/or splitter is arranged in liquid nitrogen tank, and helical tubular structure is connected with hoisting mechanism, it can will be former by hoisting mechanism
Stock column/splitter is lifted in intermediate frequency coil from liquid nitrogen tank.
6. the temperature programming control method for gas chromatography separation as claimed in claim 4, which is characterized in that heating control
During, raw material column/splitter of helix is lifted into intermediate frequency coil, control power supply makes intermediate frequency coil to spiral shell
The raw material column and/or splitter of coil shape are heated.
7. the temperature programming control method for gas chromatography separation as described in claim 1, which is characterized in that the intermediate frequency
Coil uses 100-1000Hz intermediate frequency power supply as power supply.
8. the temperature programming control method for gas chromatography separation as claimed in claim 7, which is characterized in that the intermediate frequency
Coil uses 100-500Hz intermediate frequency power supply as power supply.
9. the temperature programming control method for gas chromatography separation as described in claim 1, which is characterized in that intermediate frequency coil
The intermediate frequency power supply of 500w-5kw is selected to be heated.
10. the temperature programming control method for gas chromatography separation as claimed in claim 9, which is characterized in that intermediate frequency line
Circle selects the intermediate frequency power supply of 500w-3kw to be heated.
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| JPH01194932A (en) * | 1988-01-29 | 1989-08-04 | Hitachi Ltd | Separation of hydrogen isotope |
| JPH0740024B2 (en) * | 1991-04-17 | 1995-05-01 | 日本分析工業株式会社 | Analysis method of gas phase components by gas chromatography |
| JP2001074720A (en) * | 1999-09-01 | 2001-03-23 | Hitachi Ltd | Column and column oven |
| CN100393176C (en) * | 2005-01-07 | 2008-06-04 | 四川大学 | Automatic thermostatic heater |
| CN101850215B (en) * | 2010-05-24 | 2013-03-13 | 四川材料与工艺研究所 | Low-temperature displacement chromatography hydrogen isotope separation device and method |
| WO2014041597A1 (en) * | 2012-09-11 | 2014-03-20 | 株式会社島津製作所 | Gas chromatography device |
| CN104986731A (en) * | 2015-06-29 | 2015-10-21 | 广东合即得能源科技有限公司 | Methanol-water reforming hydrogen making machine and hydrogen making method thereof |
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