Simulation and analysis of dual-reflux pressure swing adsorption for air separation

WANG Yayan; TIAN Caixia; DING Zhaoyang; TANG Zhongli; ZHANG Donghui

doi:10.11949/0438-1157.20190172

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Simulation and analysis of dual-reflux pressure swing adsorption for air separation

Separation engineering | 更新时间：2026-07-24

- Simulation and analysis of dual-reflux pressure swing adsorption for air separation
- CIESC Journal Vol. 70, Issue 10, Pages: 4002-4011(2019)
- 作者机构：
  
  天津大学化工学院，化学工程研究所，化学工程联合国家重点实验室，天津 300350
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190172
  CLC： TQ 028.1
- Received：01 March 2019，
  
  Revised：2019-06-05，
  
  Online First：24 July 2026，
  
  Published：05 October 2019
- 稿件说明：
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汪亚燕, 田彩霞, 丁兆阳, 唐忠利, 张东辉. 基于双回流变压吸附工艺的空气分离模拟及分析[J]. 化工学报, 2019, 70(10): 4002-4011

WANG Yayan, TIAN Caixia, DING Zhaoyang, TANG Zhongli, ZHANG Donghui. Simulation and analysis of dual-reflux pressure swing adsorption for air separation[J]. CIESC Journal, 2019, 70(10): 4002-4011
汪亚燕, 田彩霞, 丁兆阳, 唐忠利, 张东辉. 基于双回流变压吸附工艺的空气分离模拟及分析[J]. 化工学报, 2019, 70(10): 4002-4011 DOI： 10.11949/0438-1157.20190172.

WANG Yayan, TIAN Caixia, DING Zhaoyang, TANG Zhongli, ZHANG Donghui. Simulation and analysis of dual-reflux pressure swing adsorption for air separation[J]. CIESC Journal, 2019, 70(10): 4002-4011 DOI： 10.11949/0438-1157.20190172.

摘要

双回流变压吸附是一种在吸附塔中间位置进料，塔顶和塔底分别采用轻、重组分回流的变压吸附过程，能够同时生产两种高纯度、高回收率的产品气。以实验室自主合成的LiLSX分子筛为吸附剂，利用Aspen Adsorption模拟软件，对进料组成为78%N

/21%O

/1%Ar的实际空气进行了两塔双回流变压吸附的模拟研究。模拟结果表明：当原料气为78%N

/21%O

/1%Ar，吸附压力为2 bar(1 bar=10

Pa)，解吸压力为0.3 bar，进料量为0.4 m

/h，轻组分回流流量为0.095 L/min，重组分回流流量为5.22 L/min时，能够得到体积分数为95.67%的O

和体积分数为98.25%的N

，回收率分别为94.60%和99.91%。并且进一步探究了进料位置、吸附时间、轻组分回流流量、重组分产品气流量等因素对O

和N

两种产品气纯度和回收率的影响。

Abstract

Double reflux pressure swing adsorption is a pressure swing adsorption process in which the feed is carried out in the middle of the adsorption tower

and the top and bottom of the tower are respectively reflowed with light and heavy components

and two high purity and high recovery product gases can be simultaneously produced. In this paper

a LiLSX zeolite synthesized by the laboratory was used as the adsorbent

meanwhile

numerical simulation of a two-bed

dual-reflux pressure swing adsorption air separation process was carried out with feed mixture (78%N

/21%O

/1%Ar) using the commercial software Aspen Adsorption. The adsorption and desorption pressure are 2 bar and 0.3 bar

the feed flow rate is 0.4 m

the light and the heavy component reflux flow rate are 0.095 L/min and 5.22 L/min. Ultimately

the purity of O

and N

reach 95.67% and 98.25% in their respective product gas

and the recovery rates are 94.60% and 99.91%

respectively. Besides

effects of operating parameters (the feed position

duration of feed step

light reflux flow rate

heavy product flow rate) on the process performances were investigated

which was more helpful for understanding this process.

关键词

Keywords

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