CO2 separation in hydrogen production by coal gasification in supercritical water

doi:10.16085/j.issn.1000-6613.2015.01.010

Chemical Industry and Engineering Progree ›› 2015, Vol. 34 ›› Issue (1): 61-64,107.DOI: 10.16085/j.issn.1000-6613.2015.01.010

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CO₂ separation in hydrogen production by coal gasification in supercritical water

YAN Qiuhui, SUN Bingjie, ZHANG Qianqian

School of Environmental and Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, Shaanxi, China

Received:2014-06-18 Revised:2014-09-10 Online:2015-01-05 Published:2015-01-05

新型超临界水中煤气化制氢产物的CO₂分离过程

闫秋会, 孙冰洁, 张倩倩

西安建筑科技大学环境与市政工程学院, 陕西西安 710055

通讯作者: 闫秋会(1965-),女,教授,从事热能动力的研究。E-mail Yanqiuhui@126.com。
作者简介:闫秋会(1965-),女,教授,从事热能动力的研究。E-mail Yanqiuhui@126.com。
基金资助:
动力工程多相流国家重点实验室开放基金和陕西省教育厅科研计划(12JK0788)共同资助项目。

Abstract

Abstract: Separation of CO₂ is mainly carried out under atmospheric pressure and there are few research reports on the methods under high pressure. A system of separating CO₂ by high pressure water and the energy and exergy analysis models of high pressure multicomponent vapor-liquid equilibrium were built according to the characteristics of coal gasification in supercritical water under high pressure. The influence of pressure on gas mole fraction and gas absorption in liquid phase in high-pressure absorber was obtained. According to the process of CO₂ separation under high pressure, the changes of energy efficiency, exergy efficiency and energy consumption of CO₂ separation during pressure change of high-pressure absorber were obtained, which provided the basis for designing separators in hydrogen production by coal gasification in supercritical water.

Key words: supercritical water, hydrogen production, dioxide carbon, coal

摘要： 目前CO₂的分离方式主要局限在常压条件下,在高压条件下分离CO₂的研究鲜有报道。本文为了解决这一问题,针对煤在超临界水中气化过程压力高的特点,构建了高压水吸收法分离CO₂系统,建立了高压多组分气液相平衡的能量分析模型和分析模型;并对CO₂的分离过程进行分析,获得了高压吸收器中压力对各种气体产物摩尔分数和液相中气体吸收率的影响规律;针对高压水吸收法分离CO₂的流程,建立了CO₂分离过程中的能量分析模型和分析模型,得到了高压吸收器中压力发生变化时,CO₂分离过程的能量效率、效率以及CO₂分离能耗的变化规律,为超临界水中煤气化制氢新技术中分离器的设计提供了依据。

关键词: 超临界水, 制氢, 二氧化碳, 煤

CLC Number:

TQ54

YAN Qiuhui, SUN Bingjie, ZHANG Qianqian. CO₂ separation in hydrogen production by coal gasification in supercritical water[J]. Chemical Industry and Engineering Progree, 2015, 34(1): 61-64,107.

闫秋会, 孙冰洁, 张倩倩. 新型超临界水中煤气化制氢产物的CO₂分离过程[J]. 化工进展, 2015, 34(1): 61-64,107.

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CO₂ separation in hydrogen production by coal gasification in supercritical water

新型超临界水中煤气化制氢产物的CO₂分离过程

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