褐煤热解-气化-制油系统的CO2减排策略

doi:10.11949/j.issn.0438-1157.20150795

化工学报 ›› 2015, Vol. 66 ›› Issue (8): 3204-3209.DOI: 10.11949/j.issn.0438-1157.20150795

褐煤热解-气化-制油系统的CO₂减排策略

范洋, 李文英, 谢克昌

太原理工大学, 煤科学与技术教育部和山西省重点实验室, 山西太原 030024

收稿日期:2015-06-02 修回日期:2015-06-10 出版日期:2015-08-05 发布日期:2015-08-05
通讯作者: 李文英
基金资助:
国家自然科学基金项目(51276120,U1361202);高等学校博士学科点专项科研基金项目(20121402110016)。

Strategies of lignite pyrolysis-gasification-oil system for CO₂ emission reduction

FAN Yang, LI Wenying, XIE Kechang

Key Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi Province, Taiyuan 030024, Shanxi, China

Received:2015-06-02 Revised:2015-06-10 Online:2015-08-05 Published:2015-08-05
Supported by:
supported by the National Natural Science Foundation of China (51276120, U1361202) and the Higher Specialized Research Fund for the Doctoral Program (20121402110016).

摘要/Abstract

摘要：

褐煤热解-气化-制油系统是现代煤化工发展的一个重要研究内容。来自系统多个单元产生的CH₄和CO₂如果发生重整反应,将重整得到H₂/CO比值较高的合成气添加到制油流程中,可实现更多的C被固定到产品中而减少CO₂的直接排放量。对CH₄-CO₂和CH₄-H₂O两种重整反应方式、来自煤热解和费托合成两股甲烷气和典型的干粉气化和水煤浆气化两种流程进行了组合研究。分析结果显示,来自热解和费托合成的甲烷重整后不足以提供调节合成气H₂/CO比例所需的氢气,水煤气变换反应对于褐煤制油系统来说是必需的。从C转化成油的角度来看,采用干粉气化和CH₄-H₂O重整的方案是较好的选择。

关键词: 褐煤, 热解, 气化, 制油过程系统, 流程模拟, CO₂

Abstract:

CO₂ emission reduction is an important aspect of advanced coal chemical engineering. The CH₄-CO₂ reforming is one of the important choices for CO₂ cycling, while the CH₄-H₂O reforming is able to reduce the CO₂ emission from the H₂ production or the adjustment of the H/C ratio of syngas. The feedstock methane can be obtained from several units of the lignite-pyrolysis-gasification-oil system. Through CH₄reforming, high ratio of H₂/CO syngas can be obtained and applied into the oil production system, more carbon would be fixed into the product and less CO₂ is thus emitted. Two reforming reactions, two methane sources and two types of gasifier, namely typical dry powder entrained-flow gasifier and coal-water slurry entrained-flow gasifier, were investigated in this work. Results showed that methane from pyrolysis and Fischer-Tropsch synthesis is deficient in adjusting H₂/CO ratio in the syngas, and the water gas shift reaction is necessary for lignite to oil system. In terms of carbon conversion to oil, the dry powder gasification-CH₄-H₂O reforming is the better choice.

Key words: lignite, pyrolysis, gasification, oil-production system, process simulation, CO₂

中图分类号:

TQ028.8

范洋, 李文英, 谢克昌. 褐煤热解-气化-制油系统的CO₂减排策略[J]. 化工学报, 2015, 66(8): 3204-3209.

FAN Yang, LI Wenying, XIE Kechang. Strategies of lignite pyrolysis-gasification-oil system for CO₂ emission reduction[J]. CIESC Journal, 2015, 66(8): 3204-3209.

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褐煤热解-气化-制油系统的CO₂减排策略

Strategies of lignite pyrolysis-gasification-oil system for CO₂ emission reduction

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