JPH0423562B2 - - Google Patents
Info
- Publication number
- JPH0423562B2 JPH0423562B2 JP59178132A JP17813284A JPH0423562B2 JP H0423562 B2 JPH0423562 B2 JP H0423562B2 JP 59178132 A JP59178132 A JP 59178132A JP 17813284 A JP17813284 A JP 17813284A JP H0423562 B2 JPH0423562 B2 JP H0423562B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- target component
- adsorption
- adsorption tower
- adsorbent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001179 sorption measurement Methods 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 19
- 239000003463 adsorbent Substances 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 5
- 238000003795 desorption Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 51
- 239000000047 product Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- -1 copper halide Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012264 purified product Substances 0.000 description 1
Landscapes
- Separation Of Gases By Adsorption (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、吸着法を用いて混合ガス中の着目
成分を吸着剤に吸着させ、しかるのち高純度の製
品ガスとして系外に取出すための分離方法に関す
る。[Detailed Description of the Invention] Industrial Application Field This invention is a separation method for adsorbing a component of interest in a mixed gas onto an adsorbent using an adsorption method, and then extracting it from the system as a highly purified product gas. Regarding.
従来の技術
混合ガス中の着目成分を分離する方法として
は、一般に精留法、吸収法、吸着法、膜法等があ
る。このうち、吸着法を用いて混合ガス中の着目
成分を吸着剤に吸着させて非着目成分と分離し、
これを脱着回収することにより製品ガスを得る方
法には、吸着剤に吸着された着目成分を吸着剤周
囲のガスの圧力を下げて脱着を行なう圧力スイン
グ式吸着法（Pressure Swing Adsorption、以
下PSAという）と、吸着剤周囲のガスおよび吸
着剤自身の温度を上げて脱着を行なう温度スイン
グ式吸着法（Thermal Swing Adsorption、以
下TSAという）の二つがある。2. Description of the Related Art Generally, methods for separating components of interest in a mixed gas include a rectification method, an absorption method, an adsorption method, a membrane method, and the like. Among these, the adsorption method is used to adsorb the target component in the mixed gas onto an adsorbent and separate it from non-target components.
A method for obtaining product gas by desorbing and recovering this gas is the pressure swing adsorption (hereinafter referred to as PSA) method, in which the component of interest adsorbed on the adsorbent is desorbed by lowering the pressure of the gas around the adsorbent. ) and the thermal swing adsorption method (hereinafter referred to as TSA), which performs desorption by increasing the temperature of the gas surrounding the adsorbent and the adsorbent itself.
そして、吸着法に使用される吸着剤としては、
着目成分に対して選択吸着性を有する吸着剤が使
用される。 The adsorbent used in the adsorption method is
An adsorbent that has selective adsorption properties for the component of interest is used.
しかし、上記吸着法においては、原料混合ガス
の供給量が使用する吸着剤と圧力、温度によつて
定まる着目成分の吸着限界までは、回収ガス中の
着目成分の濃度は上昇するが、それを超えると着
目成分の濃度は一定となり、それ以上は上昇しな
い。 However, in the above adsorption method, the concentration of the target component in the recovered gas increases until it reaches the adsorption limit of the target component, which is determined by the adsorbent used, pressure, and temperature, and the amount of raw material mixed gas supplied. Once this is exceeded, the concentration of the component of interest remains constant and does not increase any further.
このため、混合ガス中の着目成分を高純度で回
収しなければ利用価値が低い場合、例えば製鉄所
副生ガスの一つである転炉ガスから、合成化学原
料として一酸化炭素（以下COという）を回収す
るときには、COを単に吸着剤に吸着させて脱着
するだけでは目的とする純度のCOを回収するこ
とはできない。 For this reason, if a component of interest in a mixed gas has low utility value unless it is recovered in high purity, for example, carbon monoxide (hereinafter referred to as CO ), it is not possible to recover CO of the desired purity simply by adsorbing and desorbing CO on an adsorbent.
この対策として、COに対する選択吸着性を有
する吸着剤を充填した吸着塔にCO2および水分を
除去した転炉ガスを通すことによつてCOを分離
し、COを吸着した吸着塔内に高純度のCOガスを
供給することによつて吸着塔内に残存するガスを
パージし、パージ終了後に吸着塔内を減圧するこ
とによつて、吸着剤に吸着されていたCOを高純
度で回収する転炉ガス中の有用成分分離法（特開
昭59−26121号公報）等が提案されている。この
場合、吸着塔の操作は、CO2および水分を分離し
た転炉ガスを吸着塔に供給してN2を主体とする
ガスを流出させてCOを吸着させている。また、
吸着終了後、その内部に残存している不純COを
含むガスを高純度のCOガスの吹込みによつてパ
ージしており、CO収率が低いという欠点を有し
ている。 As a countermeasure for this, CO is separated by passing the converter gas from which CO 2 and moisture have been removed through an adsorption tower filled with an adsorbent that has selective adsorption properties for CO. The remaining gas in the adsorption tower is purged by supplying CO gas of A method for separating useful components from furnace gas (Japanese Unexamined Patent Publication No. 59-26121) has been proposed. In this case, the adsorption tower is operated by supplying converter gas from which CO 2 and moisture have been separated to the adsorption tower, allowing gas mainly composed of N 2 to flow out and adsorbing CO. Also,
After the adsorption is completed, the gas containing impure CO remaining inside is purged by blowing in high-purity CO gas, which has the disadvantage of a low CO yield.
解決しようとする問題点
この発明は、PSAまたはTSA法により混合ガ
ス中の着目成分を吸着剤に吸着させ、高純度着目
成分を製品ガスとして回収する際の着目成分の収
率を向上させることを目的とする。Problems to be Solved This invention aims to improve the yield of a target component in a mixed gas by adsorbing it to an adsorbent using the PSA or TSA method and recovering the high-purity target component as a product gas. purpose.
問題点を解決するための手段
この発明は、着目成分に対する選択吸着性を有
する吸着剤を充填したPSAまたはTSAの吸着塔
に原料混合ガスを供給して着目成分を吸着分離
し、しかるのち、吸着塔内に高純度の着目成分ガ
スを供給して非着目成分ガスをパージし、減圧ま
たは昇温脱着して高純度の着目成分ガスを回収す
るガス分離方法において、吸着工程で非着目成分
ガスを吸着塔から流出せしめることなく、原料混
合ガスの供給を吸着塔内が充圧するだけの量にと
どめることを特徴とするガス分離方法である。Means for Solving the Problems This invention supplies a raw material mixed gas to a PSA or TSA adsorption tower filled with an adsorbent having selective adsorption properties for the target component, adsorbs and separates the target component, and then adsorbs and separates the target component. In a gas separation method in which a high-purity target component gas is supplied into a column, non-target component gases are purged, and high-purity target component gas is recovered by depressurization or temperature elevation desorption, the non-target component gas is removed in the adsorption step. This gas separation method is characterized in that the supply of raw material mixed gas is limited to an amount sufficient to fill the adsorption tower with pressure without causing the gas to flow out from the adsorption tower.
作 用
この発明は、吸着塔に原料混合ガスを供給して
着目成分を吸着分離する際、非着目成分を吸着塔
から流出せしめることなく、原料混合ガスの供給
を吸着塔内が充圧するだけの量にとどめるという
従来技術とは異なる新規な技術思想に基づくもの
であつて、驚くべきことに従来法に比して回収着
目成分ガスの収率が大きく上昇するのである。Effects This invention is capable of supplying a raw material mixed gas to an adsorption tower and adsorbing and separating a component of interest, without causing non-targeted components to flow out of the adsorption tower, and by simply filling the adsorption tower with the supply of the raw material mixed gas. This method is based on a new technical idea that differs from the conventional method in that the amount is limited to a small amount, and surprisingly, the yield of the target component gas to be recovered is greatly increased compared to the conventional method.
この理由は、非着目成分ガスを吸着塔から流出
せしめつつ、着目成分ガスを吸着せしめる従来法
に比し、吸着圧力、温度が同一であつても、吸着
塔内における吸着前線の位置、形状が相違する。
このため、高純度の着目成分ガスによる非着目成
分のパージに際し、吸着前線の形状の相違によつ
てパージ効果に差が生じ、着目成分ガスのロスが
減少して収率が上昇するものと考えられる。 The reason for this is that compared to the conventional method in which the target component gas is adsorbed while the non-target component gas flows out of the adsorption tower, the position and shape of the adsorption front within the adsorption tower is differ.
Therefore, when purging non-target components with high-purity target component gas, differences in the shape of the adsorption front cause differences in the purge effect, reducing loss of target component gas and increasing yield. It will be done.
実施例
PSA法によるテスト装置において、吸着塔内
を最高圧1.2Kg/cm2、最低圧0.13Kg/cm2とし、ハロ
ゲン化銅を担持した活性炭系の吸着剤を用いて、
CO76.6％、N223.4％の原料混合ガスからCOを回
収する実験を行なつた。Example In a test device using the PSA method, the maximum pressure inside the adsorption tower was set to 1.2 Kg/cm 2 and the minimum pressure was 0.13 Kg/cm 2 , using an activated carbon-based adsorbent carrying copper halide.
An experiment was conducted to recover CO from a raw material mixed gas containing 76.6% CO and 23.4% N 2 .
すなわち、原料混合ガスを吸着塔からN2を排
出せしめることなく供給して0.13Kg/cm2から1.2
Kg／cm2まで充圧する本発明法（case1）と、0.113
Kg／cm2から1.2Kg/cm2まで充圧し、N2を主体とする
ガスを排出せしめつつcase1の供給ガス量の1.3倍
の量を供給した場合（case2）のそれぞれについ
て、パージ工程における製品ガスの使用量と製品
ガス中のCO濃度、CO収率との関係を試験した。
その結果を第１図に示す。 That is, by supplying the raw material mixed gas without discharging N 2 from the adsorption tower, the amount of 0.13Kg/cm 2 to 1.2
The method of the present invention (case 1) that charges up to Kg/cm 2 and 0.113
For each case (case 2) where the pressure is increased from Kg/cm 2 to 1.2Kg/cm 2 and gas consisting mainly of N 2 is exhausted, the amount of gas supplied is 1.3 times that of case 1 (case 2). We tested the relationship between the amount of gas used, the CO concentration in the product gas, and the CO yield.
The results are shown in FIG.
第１図に示すとおり、case1においては、純度
98％のCOガスを得る場合のCO収率が75％である
のに対し、case2の場合は55％であり、大きく相
違しており、本願発明の優位性は明らかである。 As shown in Figure 1, in case 1, the purity
The CO yield when obtaining 98% CO gas is 75%, whereas it is 55% in case 2, which is a large difference, and the superiority of the present invention is clear.
効 果
上記のとおりこの発明によれば、原料混合ガス
から着目成分を吸着分離する際、非着目成分ガス
を吸着塔から流出せしめることなく、原料混合ガ
スの供給を吸着塔内が充圧するだけの量にとどめ
ることによつて、高純度着目成分ガスによる非着
目成分のパージ効果が大きくなり、着目成分ガス
のロスを最小限に抑えることができ、収率を上昇
せしめることができる。Effects As described above, according to the present invention, when a component of interest is adsorbed and separated from a raw material mixed gas, the raw material mixed gas is supplied only to the pressure inside the adsorption tower, without causing non-targeted component gas to flow out of the adsorption tower. By keeping the amount to a minimum, the effect of purging non-target components by the high-purity target component gas becomes greater, the loss of the target component gas can be minimized, and the yield can be increased.
第１図は実施例におけるパージ工程での製品ガ
スの使用量と製品ガス中のCO濃度およびCO収率
との関係を示す線図である。
FIG. 1 is a diagram showing the relationship between the amount of product gas used in the purge step in the example, the CO concentration in the product gas, and the CO yield.
Claims (1)
を充填した圧力スイング式または温度スイング式
吸着法の吸着塔に原料混合ガスを供給して着目成
分ガスを吸着させ、しかるのち、吸着塔内に高純
度の製品着目成分ガスを供給して非着目成分ガス
をパージし、減圧または昇温脱着して高純度の着
目成分ガスを回収するガス分離方法において、吸
着工程で非着目成分ガスを吸着塔から流出せしめ
ることなく、原料混合ガスの供給を吸着塔内を充
圧するだけの量にとどめることを特徴とするガス
分離方法。1. The raw material mixed gas is supplied to an adsorption tower of pressure swing type or temperature swing type adsorption method filled with an adsorbent that has selective adsorption properties for the target component, and the target component gas is adsorbed. In a gas separation method in which the target component gas of the product is supplied, the non-target component gas is purged, and the high-purity target component gas is recovered by depressurization or temperature elevation desorption, the non-target component gas flows out of the adsorption tower during the adsorption process. A gas separation method characterized by limiting the supply of raw material mixed gas to an amount sufficient to fill an adsorption tower with no pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59178132A JPS6157218A (en) | 1984-08-27 | 1984-08-27 | Gas separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59178132A JPS6157218A (en) | 1984-08-27 | 1984-08-27 | Gas separation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6157218A JPS6157218A (en) | 1986-03-24 |
| JPH0423562B2 true JPH0423562B2 (en) | 1992-04-22 |
Family
ID=16043207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59178132A Granted JPS6157218A (en) | 1984-08-27 | 1984-08-27 | Gas separation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6157218A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5672196A (en) * | 1995-08-01 | 1997-09-30 | The Boc Group, Inc. | Process and apparatus for the separation of gases |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254681A (en) * | 1975-10-31 | 1977-05-04 | Toray Ind Inc | Method of recovering component easy to adsorb in mixed gas |
| JPS5299973A (en) * | 1976-02-18 | 1977-08-22 | Toray Ind Inc | Adsorption and separation apparatus of mixed gas |
| JPS52152894A (en) * | 1976-06-16 | 1977-12-19 | Toray Ind Inc | Method and apparatus for separating nitrogen from mixed gas |
| JPS52152893A (en) * | 1976-06-15 | 1977-12-19 | Toray Ind Inc | Separation and recovery of nitrogen |
| JPS5517614A (en) * | 1978-07-21 | 1980-02-07 | Hitachi Ltd | Vane for gas turbine |
-
1984
- 1984-08-27 JP JP59178132A patent/JPS6157218A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254681A (en) * | 1975-10-31 | 1977-05-04 | Toray Ind Inc | Method of recovering component easy to adsorb in mixed gas |
| JPS5299973A (en) * | 1976-02-18 | 1977-08-22 | Toray Ind Inc | Adsorption and separation apparatus of mixed gas |
| JPS52152893A (en) * | 1976-06-15 | 1977-12-19 | Toray Ind Inc | Separation and recovery of nitrogen |
| JPS52152894A (en) * | 1976-06-16 | 1977-12-19 | Toray Ind Inc | Method and apparatus for separating nitrogen from mixed gas |
| JPS5517614A (en) * | 1978-07-21 | 1980-02-07 | Hitachi Ltd | Vane for gas turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6157218A (en) | 1986-03-24 |
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