Removal of CO<sub>2</sub> from natural gas by 2-methylimidazole/ethylene glycol system at room temperature

TONG Xiongshi; PAN Yong; WANG Muyu; SHI Jialiang; CHEN Guangjin; LIU Bei

doi:10.11949/j.issn.0438-1157.20160366

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Removal of CO₂ from natural gas by 2-methylimidazole/ethylene glycol system at room temperature

更新时间：2025-11-26

- Removal of CO₂ from natural gas by 2-methylimidazole/ethylene glycol system at room temperature
- CIESC Journal Vol. 67, Issue 10, Pages: 4240-4245(2016)
- 作者机构：
  
  1. 中国石油大学(北京)重质油国家重点实验室,北京,102249
  2. 中国石油大连石化公司,辽宁,大连,116011
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160366
  CLC： E645
- Online First：05 October 2016，
  
  Published：05 October 2016
- 稿件说明：
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TONG Xiongshi, PAN Yong, WANG Muyu, et al. Removal of CO₂ from natural gas by 2-methylimidazole/ethylene glycol system at room temperature[J]. CIESC Journal, 2016, 67(10): 4240-4245. DOI: 10.11949/j.issn.0438-1157.20160366.
DOI：

TONG Xiongshi, PAN Yong, WANG Muyu, et al. Removal of CO₂ from natural gas by 2-methylimidazole/ethylene glycol system at room temperature[J]. CIESC Journal, 2016, 67(10): 4240-4245. DOI: 10.11949/j.issn.0438-1157.20160366. DOI：

摘要

将2-甲基咪唑溶于乙二醇中形成混合溶液体系，利用该体系常温下实现对天然气中二氧化碳的脱除。首先分别测定单组分甲烷和二氧化碳在体系中的吸收容量，在0.1 MPa下，CO2在2-甲基咪唑/乙二醇混合溶液中溶解度约为0.87 mol·L-1，高于同等条件下CO2在大部分离子液体中的溶解度，二氧化碳的吸收容量远大于甲烷的;然后对混合气CH4/CO2进行分离，发现该体系能较好吸收分离CH4/CO2。最后考察了体系的再生性和重复利用性，得出2-甲基咪唑/乙二醇溶液体系能完全再生并且能重复使用。

Abstract

A binary liquid mixture system of 2-methylimidazole and ethylene glycol was used to remove carbon dioxide (CO2) from natural gas at room temperature. The measurement on absorption capacity of methane (CH4) and CO2 in this system shows the CO2 solubility about 0.87 mol·L-1 at 0.1 MPa

which is higher than that in most ionic liquids under the same condition

and the absorption capacity of CO2 was greater than that of CH4. Further experimental results demonstrate that the liquid mixture could effectively separate CO2/CH4 gas mixture and could be regenerated and reused. After several cycles of absorption/desorption operations

the absorption capability was found barely changed

indicating good stability and application prospective of this binary system.

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Removal of CO2 from natural gas by 2-methylimidazole/ethylene glycol system at room temperature

DOI：10.11949/j.issn.0438-1157.20160366

摘要

Abstract

关键词

Keywords

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Removal of CO₂ from natural gas by 2-methylimidazole/ethylene glycol system at room temperature