地下煤气化合成气的脱碳提氢耦合工艺探讨

王涛; 史世杰; 曾丽瑶; 罗珊; 周振华; 丁锋; 王召民; 高继峰

doi:10.12434/j.issn.2097-2547.20230182

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地下煤气化合成气的脱碳提氢耦合工艺探讨

制氢与氢能开发利用

- 地下煤气化合成气的脱碳提氢耦合工艺探讨
- Discussion on coupling process of decarbonization and hydrogen extraction for underground coal gasification syngas
- 低碳化学与化工 2024, 49(1): 125-132.
- 作者机构：
  
  1.中石化中原石油工程设计有限公司河南郑州 451000
  2.中石化石油工程建设有限公司，北京 100020
- 作者简介：
  
  王涛（1993—），博士，工程师，研究方向为油气田地面工程，E-mail：137562701@qq.com。
  高继峰（1979—），博士，正高级工程师，研究方向为油气田地面工程，E-mail：gaojf.osec@sinopec.com。
- 基金信息：
  
  中石化石油工程公司课题(SG21-48J)
- DOI：10.12434/j.issn.2097-2547.20230182
  中图分类号：
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王涛,史世杰,曾丽瑶等.地下煤气化合成气的脱碳提氢耦合工艺探讨[J].低碳化学与化工,2024,49(01):125-132.

WANG Tao,SHI Shijie,ZENG Liyao,et al.Discussion on coupling process of decarbonization and hydrogen extraction for underground coal gasification syngas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(01):125-132.
王涛,史世杰,曾丽瑶等.地下煤气化合成气的脱碳提氢耦合工艺探讨[J].低碳化学与化工,2024,49(01):125-132. DOI： 10.12434/j.issn.2097-2547.20230182.

WANG Tao,SHI Shijie,ZENG Liyao,et al.Discussion on coupling process of decarbonization and hydrogen extraction for underground coal gasification syngas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(01):125-132. DOI： 10.12434/j.issn.2097-2547.20230182.

摘要

针对煤炭地下气化（UCG）技术制备的合成气具有温度高（,>, 200 ℃）、压力大（3.35 MPa）、饱和含水量大及组分复杂（含CH,4,、H,2,、CO,2,和CO等）的特点，设计并采用膜分离+溶剂吸收耦合的处理方法以实现地下煤合成气中CO,2,的脱除和H,2,的提纯。地下煤合成气经过二级膜分离单元的处理，实现了CO,2,/H,2,与CH,4,的分离并得到了脱碳净化气，其中CO,2,含量（物质的量分数）≤ 3%，该膜分离工艺所需能耗为0.297 kW·h/m,3,。使用醇胺吸收法处理CO,2,/H,2,混合气，并通过配方溶液筛选、工艺流程优化和校验分析等方法开展了研究，最终得到了H,2,纯度（物质的量分数）≥ 99%的产品，该醇胺吸收法的能耗为0.341 kW·h/m,3,。使用膜分离+溶剂吸收耦合处理复杂工况的地下煤合成气，可得到脱碳净化气、纯CO,2,和工业级H,2,，提高了项目的经济价值，具有较大的应用潜力。

Abstract

In response to the characteristics of high synthesis gas temperature (,>, 200 ℃), high pressure (3.35 MPa), high saturated water content and complex components (including CH,4, H,2, CO,2, CO, etc.) prepared by underground coal gasification (UCG) technology, a membrane separation + solvent absorption coupling treatment method was designed to achieve CO,2, removal and H,2, purification from underground coal gasification syngas. The underground coal gasification syngas was treated by a secondary membrane separation unit to achieve the separation of CO,2,/H,2, and CH,4, and the decarbonized purified gas is obtained, where the CO,2, content (mole fraction) is less than 3%. The energy consumption required for this membrane separation process is 0.297 kW·h/m,3,. The CO,2,/H,2, mixture was treated by amine absorption method, and the research was conducted by the methods of formula solution screening, process optimization and check analysis. Finally, the product with H,2, purity (mole fraction) ≥ 99% is obtained. The energy consumption of the amine absorption method is 0.341 kW·h/m,3,. Using membrane separation + solvent absorption coupling treatment method to treat underground coal synthesis gas under complex working conditions, decarbonized purified gas, pure CO,2, and industrial grade H,2, can be obtained, greatly improving the economic value of the project and having great application potential.

关键词

地下煤气化膜分离溶液吸收法脱碳提氢

Keywords

underground coal gasificationmembrane separationsolvent absorption methoddecarbonizationhydrogen extraction

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