JP2003236372A - Adsorbent for ammonia gas, method for manufacturing the same, and method for removing ammonia in gas by using the same - Google Patents
Adsorbent for ammonia gas, method for manufacturing the same, and method for removing ammonia in gas by using the sameInfo
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- JP2003236372A JP2003236372A JP2002042798A JP2002042798A JP2003236372A JP 2003236372 A JP2003236372 A JP 2003236372A JP 2002042798 A JP2002042798 A JP 2002042798A JP 2002042798 A JP2002042798 A JP 2002042798A JP 2003236372 A JP2003236372 A JP 2003236372A
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- ammonia
- gas
- adsorbent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アンモニアガス用
吸着剤、その製法およびそれを用いたガス中のアンモニ
アを除去する方法に関する。TECHNICAL FIELD The present invention relates to an adsorbent for ammonia gas, a method for producing the same, and a method for removing ammonia in gas using the same.
【０００２】[0002]
【従来の技術】下水処理場や畜産ふん尿処理場で発生す
る汚泥や畜産ふん尿をコンポスト化（堆肥化）するとき
には、多量のアンモニアガスが発生し、悪臭の原因とな
っている。このアンモニアガスを除去する手段として
は、（Ａ）スクラバーを用いた水による一過式物理的吸
収による除去方法すなわち水洗法、（Ｂ）スクラバーを
用いた酸（例えば塩酸や硫酸）水溶液による化学的吸収
による除去方法すなわち薬液洗浄法、（Ｃ）アンモニア
ガスの直火燃焼または低温触媒を用いた酸化分解法すな
わち燃焼法などが知られている。2. Description of the Related Art When sludge and livestock excrement produced at a sewage treatment plant or a livestock excrement treatment plant are composted (composted), a large amount of ammonia gas is generated, which causes an offensive odor. As means for removing this ammonia gas, (A) a method of removal by physical absorption with water using a scrubber, that is, a water washing method, and (B) chemical treatment with an aqueous acid (for example, hydrochloric acid or sulfuric acid) solution using a scrubber There are known a removal method by absorption, that is, a chemical cleaning method, a direct combustion of (C) ammonia gas, an oxidative decomposition method using a low temperature catalyst, that is, a combustion method, and the like.
【０００３】しかし、水洗法や薬液洗浄法では多量の水
が必要であるうえ、洗浄により発生した多量の廃液処理
が問題である。また燃焼法では窒素酸化物が発生するな
ど二次汚染の問題が発生する。これらの方法に換えて、
活性炭やゼオライトなどの市販吸着剤による吸着方法を
用いてはどうかという考え方もあるが、実際にはこれら
の吸着剤で吸着できるアンモニアガスの実用的濃度はせ
いぜい数ｐｐｍ程度であり、下水処理場や畜産ふん尿処
理場から発生する汚泥のコンポスト化（堆肥化）により
発生する５０ｐｐｍ以上、とくに８０ｐｐｍ以上の高濃
度アンモニアガスを処理することはできなかった。However, the water washing method and the chemical liquid washing method require a large amount of water, and the treatment of a large amount of waste liquid generated by washing is a problem. In addition, the combustion method causes a problem of secondary pollution such as generation of nitrogen oxides. Instead of these methods,
There is also the idea of using an adsorption method with a commercial adsorbent such as activated carbon or zeolite, but in practice, the practical concentration of ammonia gas that can be adsorbed by these adsorbents is about several ppm at most, It was not possible to treat high-concentration ammonia gas of 50 ppm or more, particularly 80 ppm or more generated by composting (composting) sludge generated from a livestock manure treatment plant.
【０００４】[0004]
【発明が解決しようとする課題】そこで、本発明の目的
は、高濃度のアンモニアガスを吸着できる新規なアンモ
ニアガス用吸着剤、その製法およびそれを用いたガス中
の高濃度アンモニアを除去する方法を提供する点にあ
る。Therefore, an object of the present invention is to provide a novel ammonia gas adsorbent capable of adsorbing high-concentration ammonia gas, a method for producing the same, and a method for removing high-concentration ammonia in gas using the same. Is in the point of providing.
【０００５】[0005]
【課題を解決するための手段】本発明の第１は、ヤシ殻
活性炭に２価の銅化合物を担持させたことを特徴とする
アンモニアガス用吸着剤に関する。本発明の第２は、２
価の銅化合物を２価の銅としてヤシ殻活性炭１ｇ当り３
０〜６０ｍｇ、好ましくは４０〜６０ｍｇ担持させた請
求項１記載のアンモニアガス用吸着剤に関する。本発明
の第３は、２価の銅化合物水溶液にヤシ殻活性炭を１０
〜５０Ｗ／Ｖ％投入し、３０分間以上浸漬した後、水切
りし、乾燥することを特徴とする請求項１または２記載
のアンモニアガス用吸着剤の製造方法に関する。本発明
の第４は、請求項１または２記載のアンモニアガス用吸
着剤を充填した吸着塔にアンモニア含有ガスを通すこと
を特徴とするガス中のアンモニアを除去する方法に関す
る。本発明の第５は、アンモニア含有ガスが下水処理施
設や畜産ふん尿処理場などのコンポスト発酵槽から発生
するものである請求項４記載のガス中のアンモニアを除
去する方法に関する。本発明の第６は、アンモニア含有
ガスがアンモニア濃度５０ｐｐｍ、以上好ましくは８０
ｐｐｍ以上、さらに好ましくは１００ｐｐｍ以上（２５
０ｐｐｍの場合でも有効）の高濃度のアンモニアを含有
するものである請求項４または５いずれか記載のガス中
のアンモニアを除去する方法に関する。The first aspect of the present invention relates to an ammonia gas adsorbent characterized in that a coconut shell activated carbon is loaded with a divalent copper compound. The second aspect of the present invention is 2
3 g per gram of coconut shell activated carbon with divalent copper compound as divalent copper
The adsorbent for ammonia gas according to claim 1, which carries 0 to 60 mg, preferably 40 to 60 mg. The third aspect of the present invention is to add 10 parts of coconut shell activated carbon to an aqueous solution of a divalent copper compound.
The method for producing an adsorbent for ammonia gas according to claim 1 or 2, characterized in that the adsorbent for ammonia gas is charged at -50 W / V%, immersed for 30 minutes or more, drained and dried. A fourth aspect of the present invention relates to a method for removing ammonia in a gas, which comprises passing an ammonia-containing gas through an adsorption tower filled with the adsorbent for ammonia gas according to claim 1 or 2. A fifth aspect of the present invention relates to the method for removing ammonia in gas according to claim 4, wherein the ammonia-containing gas is generated from a compost fermentation tank such as a sewage treatment facility or a livestock manure treatment plant. A sixth aspect of the present invention is that the ammonia-containing gas has an ammonia concentration of 50 ppm, preferably 80 or more.
ppm or more, more preferably 100 ppm or more (25
A method for removing ammonia in a gas according to claim 4 or 5, which contains a high concentration of ammonia (effective even at 0 ppm).
【０００６】前記２価の銅化合物をヤシ殻活性炭に担持
させると２価の銅は、下記のようにアンモニアと反応
し、テトラアンミン銅錯化合物に変化してアンモニアを
捕捉するするものと考えられる。When the above-mentioned divalent copper compound is supported on coconut shell activated carbon, it is considered that the divalent copper reacts with ammonia as described below and changes into a tetraammine copper complex compound to trap ammonia.
【化１】 [Chemical 1]
【０００７】前記２価の銅化合物としては、塩化第２
銅、硫酸第２銅、ヨウ化第２銅、亜酸化第２銅、酸化第
２銅、炭酸第２銅、硝酸第２銅などの無機銅化合物や酢
酸第２銅のような有機銅化合物を挙げることができる。The above-mentioned divalent copper compound is a second chloride.
Inorganic copper compounds such as copper, cupric sulfate, cupric iodide, cupric oxide, cupric oxide, cupric carbonate, cupric nitrate and organic copper compounds such as cupric acetate Can be mentioned.
【０００８】前記２価の銅化合物は、ヤシ殻活性炭１ｇ
当り３０〜６０ｍｇ、好ましくは４０〜６０ｍｇ担持さ
せる。ヤシ殻活性炭１ｇ当りに担持できる第２銅の量は
実質的に６０ｍｇが目一杯であり、２０重量％の塩化第
２銅水溶液を用いた表１の実験結果などから推定すると
第２銅の担持量は５０ｍｇ前後すなわち４０〜６０ｍｇ
程度がアンモニアガスの吸着量が多く、破過時間が長い
と考えられる。また、含浸の際のヤシ殻活性炭の添加量
は１０〜５０Ｗ／Ｖ％程度が含浸操作の作業性の点で好
ましい範囲である。The divalent copper compound is 1 g of coconut shell activated carbon.
30 to 60 mg, preferably 40 to 60 mg, is supported. The amount of cupric acid that can be supported per 1 g of coconut shell activated carbon is substantially 60 mg, and it is estimated from the experimental results in Table 1 using a 20% by weight aqueous solution of cupric chloride that cupric acid can be supported. The amount is around 50mg, that is, 40-60mg
It is considered that the amount of ammonia gas adsorbed is large and the breakthrough time is long. The amount of coconut shell activated carbon added during impregnation is preferably in the range of 10 to 50 W / V% in terms of workability in the impregnation operation.
【０００９】担体としては、通常ゼオライトや活性炭な
どを思い浮かべるが、ゼオライトは吸湿性があるため、
湿ったガスを相手にするときは不適当であり、また非表
面積や平均細孔径などの物性面においても活性炭より劣
っている。本発明では活性炭のなかでもヤシ殻活性炭
（ヤシ殻破砕活性炭）を使用する。ヤシ殻活性炭は活性
炭のなかでもヨウ素、ＭＢ（メチレンブルー）、ベンゼ
ンなどの化学物質に対する吸着性に優れており、かつ、
本発明におけるアンモニアに対しても優れた吸着性を示
したので、本発明では担体としてとくにヤシ殻活性炭を
選択したものである。As the carrier, zeolite and activated carbon are usually thought of, but since zeolite has hygroscopicity,
It is not suitable when used with a wet gas, and is inferior to activated carbon in physical properties such as non-surface area and average pore size. In the present invention, coconut shell activated carbon (coconut shell crushed activated carbon) is used among the activated carbons. Among the activated carbons, coconut shell activated carbon has excellent adsorptivity for chemical substances such as iodine, MB (methylene blue) and benzene, and
In the present invention, coconut shell activated carbon is particularly selected as the carrier because it exhibits excellent adsorptivity to ammonia in the present invention.
【００１０】本発明の製造方法において、２価の銅化合
物をヤシ殻活性炭に含浸後、銅をヤシ殻活性炭に添着担
持させるためには、乾燥は重要な工程である。含浸工程
により活性炭細孔に吸着された水分の除去は、通常１０
０℃±１０℃程度の温度に保った乾燥機を用いて行う。
乾燥時間は通常１０〜１２時間を要する。In the production method of the present invention, drying is an important step for impregnating and supporting copper on the coconut shell activated carbon after impregnating the divalent copper compound into the coconut shell activated carbon. The removal of the water adsorbed on the activated carbon pores by the impregnation step is usually 10
It is carried out using a dryer kept at a temperature of 0 ° C ± 10 ° C.
The drying time usually requires 10 to 12 hours.
【００１１】ヤシ殻活性炭に２価の銅を担持するのに用
いる２価の銅化合物水溶液における２価の銅化合物の濃
度にとくに制限はないが通常５重量％以上飽和濃度以下
の水溶液を用いることができるが、作業効率などを考慮
すると１０〜３０重量％の濃度のものを使用することが
好ましい。この水溶液濃度に対応して担体に担持される
最高の担持量が決ってくるが、本発明ではアンモニアガ
スを吸着させるのが目的であるから、その破過時間
〔ｔ〕（ｈｒ）や破過吸着量〔ｑ〕（％）が大きいこと
こそ重要である。本発明においては、破過時間が１０時
間以上、好ましくは２０時間以上、とくに好ましくは２
５時間以上であり、破過吸着量は１．５％以上、好まし
くは２％以上、とくに好ましくは２．５％以上である。
なお、破過時間や破過吸着量とは、充填層に一定濃度の
被吸着物を流したとき、一定時間が経過するまでは流出
物中の被吸着物はほぼ一定の低い値に保たれるが、吸着
剤における吸着場所がほぼ満席になったと推測される時
間が経過した後は、急激に流出物中の被吸着物の量が増
大する。この点を破過点といい、その破過点に達するま
での時間が破過時間であり、破過点に達したときの流出
物中の被吸着物濃度が破過吸着量である。There is no particular limitation on the concentration of the divalent copper compound in the aqueous solution of the divalent copper compound used for supporting the divalent copper on the coconut shell activated carbon, but usually an aqueous solution having a concentration of 5% by weight or more and a saturated concentration or less is used. However, in consideration of work efficiency and the like, it is preferable to use one having a concentration of 10 to 30% by weight. The maximum amount supported on the carrier is determined according to the concentration of the aqueous solution, but since the purpose of the present invention is to adsorb ammonia gas, its breakthrough time [t] (hr) and breakthrough It is important that the adsorption amount [q] (%) is large. In the present invention, the breakthrough time is 10 hours or longer, preferably 20 hours or longer, particularly preferably 2 hours.
It is 5 hours or more, and the amount of breakthrough adsorption is 1.5% or more, preferably 2% or more, particularly preferably 2.5% or more.
It should be noted that the breakthrough time and the breakthrough adsorption amount are, when a constant concentration of the adsorbate is passed through the packed bed, the adsorbate in the effluent is kept at a substantially constant low value until a fixed time elapses. However, the amount of the adsorbed substance in the effluent rapidly increases after a lapse of time when it is estimated that the adsorption site in the adsorbent is almost full. This point is called a breakthrough point, the time until reaching the breakthrough point is the breakthrough time, and the concentration of the adsorbed substance in the effluent at the time when the breakthrough point is reached is the breakthrough adsorption amount.
【００１２】破過時間や破過吸着量を測定することによ
り、２価の銅化合物水溶液濃度とそれに含浸して得られ
たヤシ殻活性炭の性能を調べてみた。測定方法と測定条
件は以下に示す。By measuring the breakthrough time and the amount of breakthrough adsorption, the concentration of the divalent copper compound aqueous solution and the performance of the coconut shell activated carbon obtained by impregnating it were examined. The measurement method and measurement conditions are shown below.
【００１３】測定条件 ガス流量 ：５４０リットル／時 ガス温度 ：２５℃ アンモニア濃度 ：１００ｐｐｍ ガス線速度 ：０．３ｍ／秒 充填厚さ ：１２８ｍｍ（充填量３８．４ｇ）Measurement conditions Gas flow rate: 540 liters / hour Gas temperature: 25 ℃ Ammonia concentration: 100ppm Gas linear velocity: 0.3m / sec Filling thickness: 128 mm (filling amount 38.4 g)
【００１４】測定装置は、図１に示す。The measuring device is shown in FIG.
【００１５】測定方法は、図１に示す測定装置（吸着試
験装置）を用い、前記測定条件にしたがって、塩化第２
銅含浸炭（ヤシ殻活性炭）を充填した直径２５ｍｍ、高
さ３００ｍｍの吸着塔、１００ｐｐｍ濃度のアンモニア
含有ガス（圧縮エアーを恒温水槽に吹き込んで得られた
１００％湿度の空気とアンモニア標準ガスを混合して調
整する）を流量５４０リットル／時で流し、破過曲線を
画き、破過時間と破過吸着量を求めた。The measuring method uses the measuring apparatus (adsorption test apparatus) shown in FIG.
An adsorption tower with a diameter of 25 mm and a height of 300 mm filled with copper-impregnated carbon (coconut shell activated carbon), an ammonia-containing gas with a concentration of 100 ppm (100% humidity air obtained by blowing compressed air into a constant temperature water tank and ammonia standard gas are mixed. Was flown at a flow rate of 540 liters / hour, a breakthrough curve was drawn, and a breakthrough time and a breakthrough adsorption amount were determined.
【００１６】本発明のアンモニアガス用吸着剤を製造す
るのに用いる第２銅化合物水溶液の水溶液濃度がどの程
度が好適であるかを調べるため、５％破過時間とその吸
着量を前記測定装置により測定した。５％破過時間と
は、アンモニアの入口濃度１００ｐｐｍに対して、出口
濃度が５ｐｐｍになるまでの時間である。活性炭はいず
れもヤシ殻活性炭であり、第２銅化合物水溶液として
は、１０重量％塩化第２銅水溶液、２０重量％塩化第２
銅水溶液、３０重量％塩化第２銅水溶液をそれぞれ用
い、含浸時間は６０分、水温２５℃で実施した。その結
果、下記のデータが得られた。なお表中活性炭とはヤシ
殻活性炭を指す。The 5% breakthrough time and the amount of adsorption thereof are measured by the above-mentioned measuring device in order to examine the optimum concentration of the aqueous solution of cupric compound used for producing the adsorbent for ammonia gas of the present invention. It was measured by. The 5% breakthrough time is the time until the outlet concentration reaches 5 ppm with respect to the ammonia inlet concentration of 100 ppm. The activated carbons are all coconut shell activated carbons, and as the cupric compound aqueous solution, 10 wt% cupric chloride aqueous solution and 20 wt% cupric chloride second
A copper aqueous solution and a 30 wt% cupric chloride aqueous solution were used, respectively, and the impregnation time was 60 minutes and the water temperature was 25 ° C. As a result, the following data were obtained. The activated carbon in the table means coconut shell activated carbon.
【００１７】[0017]
【表１】 [Table 1]
【００１８】前記表からも明らかなように、２価の銅化
合物水溶液の濃度を高くしていくと、ある濃度までは、
２価の銅化合物を吸着したヤシ殻活性炭のアンモニア吸
着処理能力が向上するが、ある濃度に達するとほぼ飽和
状態になる。この目安は、２価の銅化合物水溶液濃度が
２０重量％辺りである。As is clear from the above table, when the concentration of the divalent copper compound aqueous solution is increased, up to a certain concentration,
Ammonia adsorption treatment capacity of the coconut shell activated carbon adsorbing a divalent copper compound is improved, but when it reaches a certain concentration, it becomes almost saturated. This guideline is that the concentration of the divalent copper compound aqueous solution is around 20% by weight.
【００１９】さらに塩化第２銅２０重量％水溶液を用い
てヤシ殻活性炭を含浸（含浸時間６０分、水溶液温度２
５℃）させて得られた本発明のアンモニアガス用吸着剤
の破過曲線と破過時間の関係を求めたのが図２における
黒丸で示すグラフである。なお白丸で示すグラフは、何
も含浸していないヤシ殻活性炭をアンモニアガス用吸着
剤として用いた場合の破過曲線と破過時間の関係を求め
たグラフである。なお、図２の縦軸のＣ／ＣＯにおける
ＣＯはアンモニア入口濃度（初濃度）であり、Ｃはアン
モニア出口濃度（流出濃度）を意味している。また、図
３はアンモニアの吸着量（ｇ／１００ｇ吸着剤）と時間
（ｈｒ）との関係を示すグラフであり、黒丸と白丸の関
係は図２の場合と同じである。Further, coconut shell activated carbon was impregnated with a 20% by weight cupric chloride aqueous solution (impregnation time 60 minutes, aqueous solution temperature 2
The relationship between the breakthrough curve and the breakthrough time of the adsorbent for ammonia gas of the present invention obtained at 5 ° C.) is determined by the graph shown by a black circle in FIG. The graphs indicated by open circles are graphs in which the relationship between the breakthrough curve and the breakthrough time was obtained when coconut shell activated carbon not impregnated with anything was used as an adsorbent for ammonia gas. Note that CO in C / CO on the vertical axis in FIG. 2 is the ammonia inlet concentration (initial concentration), and C means the ammonia outlet concentration (outflow concentration). FIG. 3 is a graph showing the relationship between the amount of adsorbed ammonia (g / 100 g adsorbent) and time (hr), and the relationship between black circles and white circles is the same as in FIG.
【００２０】つぎに、ヤシ殻活性炭に吸着している第２
銅がアンモニアの吸着によりどのように変化しているか
を調べる目的で、アンモニア吸着前とアンモニア吸着後
の塩化第２銅２０重量％水溶液で含浸処理（含浸時間６
０分、水溶液温度２５℃）したヤシ殻活性炭のそれぞれ
について、銅溶出試験を行った。その結果は表２に示す
とおりである。なお、溶出試験は、試験に供する吸着剤
各３ｇをそれぞれ１００ミリリットルの水と混合し、２
５℃で２０分間超音波処理し、水中に溶出した銅の濃度
を測定することにより行った。Next, the second adsorbed on the coconut shell activated carbon
For the purpose of investigating how copper is changed by the adsorption of ammonia, impregnation treatment with a 20% by weight aqueous solution of cupric chloride before and after adsorption of ammonia (impregnation time 6
A copper elution test was carried out for each of the coconut shell activated carbons that had been subjected to 0 minutes and an aqueous solution temperature of 25 ° C). The results are shown in Table 2. The elution test was conducted by mixing 3 g of each adsorbent used in the test with 100 ml of water and
Sonication was performed at 5 ° C. for 20 minutes, and the concentration of copper eluted in water was measured.
【００２１】[0021]
【表２】 [Table 2]
【００２２】前記表２に示すように、アンモニア吸着後
における銅の溶出濃度は１ｍｇ／リットルといったよう
にほんの僅かであり、９９．９％以上が銅錯化合物に変
化しており、脱着はおこらなかった。As shown in Table 2, the elution concentration of copper after the adsorption of ammonia was only 1 mg / liter, and 99.9% or more was changed to the copper complex compound, and desorption did not occur. It was
【００２３】[0023]
【実施例】以下に実施例、比較例を挙げて本発明を説明
するのが、本発明はこれにより何ら限定されるものでは
ない。The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited thereto.
【００２４】実施例１
ヤシ殻活性炭６００ｋｇを塩化第２銅の２０重量％水溶
液２ｍ３（２０００リットル）に６０分、水温２５℃で
含浸処理する。含浸中はときどき撹拌する程度とした。
ついで水切り後、乾燥機内において１００℃で１２時間
乾燥し、本発明のアンモニアガス用吸着剤を得た。これ
を吸着塔に充填した。下水処理施設のコンポスト発酵槽
から発生する高濃度アンモニアガスを前記吸着塔へ、表
３の運転条件で通気し、表４に示す結果を得た。表４に
示すように、吸着塔出口のアンモニアガスは通気開始か
ら６ヶ月間、悪臭防止法に規定された限界臭気強度２．
５（１ｐｐｍ）以下の濃度を保持することができた。Example 1 600 kg of coconut shell activated carbon was impregnated with 2 m 3 (2000 liters) of a 20 wt% aqueous solution of cupric chloride for 60 minutes at a water temperature of 25 ° C. During the impregnation, stirring was occasionally performed.
Then, after draining, it was dried in a dryer at 100 ° C. for 12 hours to obtain an adsorbent for ammonia gas of the present invention. This was packed in an adsorption tower. High-concentration ammonia gas generated from the compost fermentation tank of the sewage treatment facility was ventilated into the adsorption tower under the operating conditions shown in Table 3, and the results shown in Table 4 were obtained. As shown in Table 4, the ammonia gas at the outlet of the adsorption tower had a limit odor intensity of 2.
It was possible to maintain a concentration of 5 (1 ppm) or less.
【００２５】[0025]
【表３】 [Table 3]
【００２６】[0026]
【表４】 [Table 4]
【００２７】比較例
表１における１０重量％塩化第２銅水溶液を用いたケー
スに代えて、１０重量％硫酸亜鉛水溶液または１０重量
％硫酸第２鉄水溶液を用いたケースについて、表１の測
定方法と同様にして５％破過時間（ｈｒ）と破過吸着量
（％）を求めた。その結果は表５に示すとおりである。Comparative Example In place of the case of using the 10 wt% cupric chloride aqueous solution in Table 1, a measuring method of Table 1 is used for the case of using the 10 wt% zinc sulfate aqueous solution or the 10 wt% ferric sulfate aqueous solution. Similarly, the 5% breakthrough time (hr) and the breakthrough adsorption amount (%) were determined. The results are shown in Table 5.
【００２８】[0028]
【表５】
以上の結果から、２価の銅化合物の選択的効果は明白で
ある。[Table 5] From the above results, the selective effect of the divalent copper compound is clear.
【００２９】[0029]
【発明の効果】（１）本発明により、新規なアンモニア
ガス用吸着剤を提供できた。この新規なアンモニアガス
用吸着剤は５０ｐｐｍ、とくに１００ｐｐｍ前後の高濃
度アンモニア含有ガスに対しても６ヶ月程度吸着剤の交
換を必要としないで使用できるという極めて優れた性能
を示す。
（２）また、本発明の吸着剤は銅を含有するため吸着剤
に付着する微生物、たとえばカビの増殖を抑制できる。
（３）本発明の吸着剤を用いれば、吸着操作に必要な装
置は、吸着塔があればよく、運転管理も容易である。(1) According to the present invention, a novel adsorbent for ammonia gas can be provided. This novel adsorbent for ammonia gas shows extremely excellent performance that it can be used for high-concentration ammonia-containing gas of 50 ppm, especially around 100 ppm, without needing to replace the adsorbent for about 6 months. (2) Further, since the adsorbent of the present invention contains copper, it is possible to suppress the growth of microorganisms such as mold that adhere to the adsorbent. (3) If the adsorbent of the present invention is used, the apparatus required for the adsorption operation only needs to have an adsorption tower, and operation management is easy.
【図１】本発明における５％破過時間および５％破過吸
着量を求めるための試験装置を示す。FIG. 1 shows a test apparatus for determining a 5% breakthrough time and a 5% breakthrough adsorption amount according to the present invention.
【図２】塩化第２銅の２０重量％水溶液を含浸したヤシ
殻活性炭による破過曲線を示すグラフであり、破過曲線
は５０時間（Ｃ／Ｃ０＝０．８）で一定となり、吸着保
持量は４．４％であった。FIG. 2 is a graph showing a breakthrough curve obtained by coconut shell activated carbon impregnated with a 20 wt% aqueous solution of cupric chloride, wherein the breakthrough curve becomes constant after 50 hours (C / C 0 = 0.8). The retained amount was 4.4%.
【図３】図２に対応したアンモニア吸着量と時間の関係
を示すグラフである。FIG. 3 is a graph showing the relationship between the amount of adsorbed ammonia and time corresponding to FIG.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 進藤 修 東京都豊島区東池袋１丁目７番12号 日産 ビル 扶桑ユニテック株式会社内 Ｆターム(参考） 4D002 AA13 AC10 BA04 CA07 DA11 DA14 DA16 DA17 DA23 DA41 DA61 DA70 GA01 GB02 4G066 AA05B AA05C AA37B BA36 CA29 DA02 FA12 FA21 FA37 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Osamu Shindo 1-7-12 Higashiikebukuro, Toshima-ku, Tokyo Nissan Building Fuso Unitech Co., Ltd. F term (reference) 4D002 AA13 AC10 BA04 CA07 DA11 DA14 DA16 DA17 DA23 DA41 DA61 DA70 GA01 GB02 4G066 AA05B AA05C AA37B BA36 CA29 DA02 FA12 FA21 FA37
Claims (6)
せたことを特徴とするアンモニアガス用吸着剤。1. An adsorbent for ammonia gas, characterized in that coconut shell activated carbon is loaded with a divalent copper compound.
活性炭１ｇ当り３０〜６０ｍｇ担持させた請求項１記載
のアンモニアガス用吸着剤。2. The adsorbent for ammonia gas according to claim 1, wherein the divalent copper compound is supported as divalent copper in an amount of 30 to 60 mg per 1 g of coconut shell activated carbon.
１０〜５０Ｗ／Ｖ％投入し、３０分間以上浸漬した後、
水切りし、乾燥することを特徴とする請求項１または２
記載のアンモニアガス用吸着剤の製造方法。3. Coconut shell activated carbon is added to a divalent copper compound aqueous solution in an amount of 10 to 50 W / V%, and after dipping for 30 minutes or more,
3. Draining and drying.
A method for producing the adsorbent for ammonia gas as described above.
用吸着剤を充填した吸着塔にアンモニア含有ガスを通す
ことを特徴とするガス中のアンモニアを除去する方法。4. A method for removing ammonia from a gas, which comprises passing an ammonia-containing gas through an adsorption tower filled with the adsorbent for ammonia gas according to claim 1.
から発生するものである請求項４記載のガス中のアンモ
ニアを除去する方法。5. The method for removing ammonia in a gas according to claim 4, wherein the ammonia-containing gas is generated from a compost fermentation tank.
０ｐｐｍ以上の高濃度のアンモニアを含有するものであ
る請求項４または５いずれか記載のガス中のアンモニア
を除去する方法。6. The ammonia-containing gas has an ammonia concentration of 5
The method for removing ammonia in a gas according to claim 4, wherein the ammonia contains a high concentration of 0 ppm or more.
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|---|---|---|---|
| JP2002042798A JP2003236372A (en) | 2002-02-20 | 2002-02-20 | Adsorbent for ammonia gas, method for manufacturing the same, and method for removing ammonia in gas by using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002042798A JP2003236372A (en) | 2002-02-20 | 2002-02-20 | Adsorbent for ammonia gas, method for manufacturing the same, and method for removing ammonia in gas by using the same |
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|---|---|
| JP2003236372A true JP2003236372A (en) | 2003-08-26 |
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ID=27782791
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009244122A (en) * | 2008-03-31 | 2009-10-22 | Fuji Electric Holdings Co Ltd | Pretreatment method for activated carbon analysis |
| CN101780399A (en) * | 2010-04-07 | 2010-07-21 | 胡志杰 | Method for preparing gas phase absorption activated carbon from pine nut shells |
| CN104390960A (en) * | 2014-11-06 | 2015-03-04 | 华南农业大学 | Dynamic box-type device and method for determining ammonia gas in aerobic composting |
-
2002
- 2002-02-20 JP JP2002042798A patent/JP2003236372A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009244122A (en) * | 2008-03-31 | 2009-10-22 | Fuji Electric Holdings Co Ltd | Pretreatment method for activated carbon analysis |
| CN101780399A (en) * | 2010-04-07 | 2010-07-21 | 胡志杰 | Method for preparing gas phase absorption activated carbon from pine nut shells |
| CN104390960A (en) * | 2014-11-06 | 2015-03-04 | 华南农业大学 | Dynamic box-type device and method for determining ammonia gas in aerobic composting |
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