CH<sub>4</sub>/CO<sub>2</sub>混合气置换强化含氮低品质甲烷的浓缩

曲冬蕾; 杨颖; 钱智玲; 李平; 于建国

doi:10.11949/0438-1157.20200416

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CH₄/CO₂混合气置换强化含氮低品质甲烷的浓缩

分离工程 | 更新时间：2026-07-24

- CH₄/CO₂混合气置换强化含氮低品质甲烷的浓缩
- Intensification of low-grade methane enrichment in nitrogen mixture by CH₄/CO₂ displacement
- 化工学报 2020年71卷第12期页码：5599-5609
- 作者机构：
  
  华东理工大学化工学院，化学工程联合国家重点实验室，上海 200237
- 作者简介：
  
  曲冬蕾（1992—），女，博士研究生，dongleiqu@163.com
  李平（1962—），女，教授，liping_2007@ecust.edu.cn
- 基金信息：
  
  国家自然科学基金项目(21978090;U1610102;51804127);政府间国际合作重点专项(2016YFE0132500;2015DFG42220)
- DOI：10.11949/0438-1157.20200416
  中图分类号： TQ 028.1
- 收稿：2020-04-21，
  
  修回：2020-06-08，
  
  网络首发：2020-12-17，
  
  纸质出版：2020-12-05
- 稿件说明：
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曲冬蕾, 杨颖, 钱智玲, 李平, 于建国. CH₄/CO₂混合气置换强化含氮低品质甲烷的浓缩[J]. 化工学报, 2020, 71(12): 5599-5609 DOI: 10.11949/0438-1157.20200416.

QU Donglei, YANG Ying, QIAN Zhiling, LI Ping, YU Jianguo. Intensification of low-grade methane enrichment in nitrogen mixture by CH₄/CO₂ displacement[J]. CIESC Journal, 2020, 71(12): 5599-5609 DOI: 10.11949/0438-1157.20200416.
曲冬蕾, 杨颖, 钱智玲, 李平, 于建国. CH₄/CO₂混合气置换强化含氮低品质甲烷的浓缩[J]. 化工学报, 2020, 71(12): 5599-5609 DOI: 10.11949/0438-1157.20200416. DOI：

QU Donglei, YANG Ying, QIAN Zhiling, LI Ping, YU Jianguo. Intensification of low-grade methane enrichment in nitrogen mixture by CH₄/CO₂ displacement[J]. CIESC Journal, 2020, 71(12): 5599-5609 DOI: 10.11949/0438-1157.20200416. DOI：

摘要

针对CO

置换吸附分离CH

过程中CO

再生困难的问题，采用少量产品气CH

真空吹扫以提高CO

的解吸效果，并以解吸得到的CH

/CO

混合气为置换步骤的置换气，通过置换来强化含氮低品质甲烷的浓缩过程。以自制椰壳活性炭为吸附剂，对CH

/CO

混合气置换强化吸附回收含氮低品质甲烷工艺过程进行了实验与模拟研究。在gPROMS软件中建立并求解固定床吸附分离模型方程，预测了CH

、N

和CO

在自制椰壳活性炭上的竞争吸附穿透曲线，通过预测结果和实验的对比，验证了数学模型方程的准确性。对比了不同置换气强化吸附分离低品质甲烷的效果，结果表明CH

/CO

混合气置换强化相对于CO

置换强化可获得更高纯度产品。进行了CH

/CO

混合气置换强化真空变压吸附循环实验，可以将14%的CH

和53%的CH

/CO

联合富集到98.8%，同时获得77.8%的回收率。

Abstract

To solve the problem of CO

uncompleted desorption in the process of CO

displacemen

t enhancing the adsorption separation of CH

a small amount of product gas CH

was used as purge gas to improve the CO

desorption. CH

/CO

mixture gas obtained from desorption step was recycled as the displacement gas to enhance the enrichment of low-grade methane in nitrogen mixture. In this work

the research conducted the experiments for CH

separation using CH

/CO

displacement intensification adsorption and the laboratory-made coconut shell activated carbon as sorbent. The mathematical models were built in gPROMS and the accuracy of models was verified by comparison of simulations and CH

/CO

breakthrough experiments. The performance of enrichment of low-grade methane with displacement intensification using different displacer was compared. The result showed that the process with CH

/CO

displacement had higher purity product than CO

displacement. The CH

/ CO

mixed gas replacement enhanced vacuum pressure swing adsorption cycle experiment was carried out

which can jointly enrich 14% CH

/ N

and 53% CH

/CO

to 98.8%

and at the same time obtain a recovery rate of 77.8%.

关键词

Keywords

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CH4/CO2混合气置换强化含氮低品质甲烷的浓缩

Intensification of low-grade methane enrichment in nitrogen mixture by CH4/CO2 displacement

DOI：10.11949/0438-1157.20200416

摘要

Abstract

关键词

Keywords

references

CH₄/CO₂混合气置换强化含氮低品质甲烷的浓缩

Intensification of low-grade methane enrichment in nitrogen mixture by CH₄/CO₂ displacement