气煤联供实现资源高效利用和碳减排技术进展

doi:10.16085/j.issn.1000-6613.2018-1226

化工进展 ›› 2019, Vol. 38 ›› Issue (01): 664-671.DOI: 10.16085/j.issn.1000-6613.2018-1226

气煤联供实现资源高效利用和碳减排技术进展

刘硕士(),杨思宇,顾竞芳,钱宇()

华南理工大学化学与化工学院，广东省绿色化学产品技术重点实验室，广东广州 510640

收稿日期:2018-06-12 修回日期:2018-07-31 出版日期:2019-01-05 发布日期:2019-01-05
通讯作者: 钱宇
作者简介:刘硕士（1994—），男，博士研究生，研究方向为过程系统工程。E-mail：<email>cemasterliu@mail.scut.edu.cn</email>。|钱宇，教授，博士生导师，研究方向为过程系统工程。E-mail：<email>ceyuqian@scut.edu.cn</email>。
基金资助:
国家自然科学基金重点项目(21736004);省部共建煤炭高效利用与绿色化工国家重点实验室开放课题(2017-K03);国家自然科学基金重点项目（21736004）；省部共建煤炭高效利用与绿色化工国家重点实验室开放课题（2017-K03）。

Review on coal and gas co-feed processes for better resource use and lower carbon emission

Shuoshi LIU(),Siyu YANG,Jingfang GU,Yu QIAN()

The Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China

Received:2018-06-12 Revised:2018-07-31 Online:2019-01-05 Published:2019-01-05
Contact: Yu QIAN

摘要/Abstract

摘要：

为解决煤化工过程资源利用率低和碳排放高的问题，有研究者提出以天然气、焦炉气、页岩气等富氢资源和煤炭资源联供方案，旨在实现源头碳减排。文章指出依据联供过程技术的差异，较有代表性的方案可分为集成甲烷部分氧化和集成甲烷干/水蒸气重整的气煤联供过程。文章以生产甲醇为例，从资源利用和经济效益等方面对集成甲烷部分氧化和集成甲烷干/水蒸气重整的气煤联供过程进行分析和比较。集成甲烷部分氧化的工艺碳元素利用率达到57.9%，每吨甲醇排放CO₂为1.50t，较传统煤制甲醇工艺排放减少37.5%。甲醇产品成本稍低于传统工艺。集成甲烷干/水蒸气重整工艺的碳元素利用率最高，达到83.7%。减排效果最明显，每吨甲醇排放CO₂为0.90t，较传统工艺排放减少62.5%，但是由于CO₂转化增加能耗，甲醇产品成本有所提升。由于气煤联供过程有利于CO₂减排，当碳税高于65CNY/tCO₂时，两个气煤联供工艺的生产成本低于传统的煤制甲醇工艺。

关键词: 气煤联供, 甲烷部分氧化, 甲烷干/水蒸气重整, 技术-经济分析, 碳氢元素利用

Abstract:

The low resource efficiency and high carbon emission are severe in coal chemical industries. A great number of co-feed processes of coal and hydrogen-rich gas were proposed to achieve carbon reduction at source. The integrated hydrogen-rich gas includes natural gas, coke-oven gas and shale gas. The representative co-feed processes can be divided into the co-feed process integrated with methane partial oxidation (MPO) and the co-feed process integrated with dry/steam methane reforming (DMR/SMR) according to the differences in process. Tech-economic analysis was conducted for these two processes by means of resource utilization and economic performance, compared with the conventional coal to methanol (CTM) process. The co-feed process with MPO has higher carbon elemental utilization ratios up to 57.9%. It emits 1.50t CO₂ per ton methanol, giving 37.5% reduction. It has a slightly lower production cost. The process integrated with DMR/SMR has the highest carbon utilization ratios of 83.7%. The carbon emission reduction effect is the most obvious. This process emits 0.90t CO₂ per ton methanol, which is 62.5% lower than the traditional process. It has a slightly higher production cost brought by the energy consumption of CO₂ conversion. With the carbon tax higher than 65CNY/t, the advantage of these co-feed processes is emerging on economy due to its carbon reduction.

Key words: coal and gas co-feed, methane partial oxidation, dry/steam methane reforming, techno-economic analysis, element utilization

中图分类号:

TQ536.1

刘硕士, 杨思宇, 顾竞芳, 钱宇. 气煤联供实现资源高效利用和碳减排技术进展[J]. 化工进展, 2019, 38(01): 664-671.

Shuoshi LIU, Siyu YANG, Jingfang GU, Yu QIAN. Review on coal and gas co-feed processes for better resource use and lower carbon emission[J]. Chemical Industry and Engineering Progress, 2019, 38(01): 664-671.

图/表 11

参考文献 36

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流程	技术规范参数	CTM^[9,10]	MPO^[5,13]	DMR/SMR^[6,20,23]
煤气化（Texaco）	气化压力/MPa	4.2	4.2	4.2
	气化温度/℃	1300	1300	1300
	碳转化率/%	98	98	98
空分	高压/MPa	0.6	0.6	0.6
	低压/MPa	0.13	0.13	0.13
水煤气变换（Co-Mo）	高温段入口温度/℃	400
	低温段入口温度/℃	210
酸性气体脱除（Rectisol）	CO₂吸收温度/℃	-33		-33
	H₂S吸收温度/℃	-23		-23
变压吸附	氢气收率			>90%
甲烷部分氧化	反应压力/MPa		3.0
	反应温度/℃		1000
	碳转化率/%		>88
甲烷干重整	反应压力/MPa			0.1
	反应温度/℃			800
	碳转化率/%			99.9
甲烷水蒸气重整	反应压力/MPa			0.1
	反应温度/℃			900
	碳转化率/%			99.9
甲醇合成	反应压力/MPa	5.0	5.0	5.0
	反应温度/℃	240	250	240
	循环比	4.5	4.0	4.5

流程	技术规范参数	CTM^[9,10]	MPO^[5,13]	DMR/SMR^[6,20,23]
煤气化（Texaco）	气化压力/MPa	4.2	4.2	4.2
	气化温度/℃	1300	1300	1300
	碳转化率/%	98	98	98
空分	高压/MPa	0.6	0.6	0.6
	低压/MPa	0.13	0.13	0.13
水煤气变换（Co-Mo）	高温段入口温度/℃	400
	低温段入口温度/℃	210
酸性气体脱除（Rectisol）	CO₂吸收温度/℃	-33		-33
	H₂S吸收温度/℃	-23		-23
变压吸附	氢气收率			>90%
甲烷部分氧化	反应压力/MPa		3.0
	反应温度/℃		1000
	碳转化率/%		>88
甲烷干重整	反应压力/MPa			0.1
	反应温度/℃			800
	碳转化率/%			99.9
甲烷水蒸气重整	反应压力/MPa			0.1
	反应温度/℃			900
	碳转化率/%			99.9
甲醇合成	反应压力/MPa	5.0	5.0	5.0
	反应温度/℃	240	250	240
	循环比	4.5	4.0	4.5

参数	流程
参数	CTM	MPO	DMR/SMR
规模/kt·a^-1	1200	1200	1200
总投资/×10⁹ CNY	5.8	2.5	4.0
物料和能量消耗
煤/t·(t甲醇) ^-1	1.32	0.21	0.36
焦炉气/m³·(t甲醇) ^-1	N/A	1600	1217
氧气/m³·(t甲醇) ^-1	858	560	234
蒸汽/MJ·(t甲醇) ^-1	5403	0	5093
电力/KW·h·(t甲醇) ^-1	548	651	612
产品成本/CNY·t ^-1	1840	1732	1936

参数	流程
参数	CTM	MPO	DMR/SMR
规模/kt·a^-1	1200	1200	1200
总投资/×10⁹ CNY	5.8	2.5	4.0
物料和能量消耗
煤/t·(t甲醇) ^-1	1.32	0.21	0.36
焦炉气/m³·(t甲醇) ^-1	N/A	1600	1217
氧气/m³·(t甲醇) ^-1	858	560	234
蒸汽/MJ·(t甲醇) ^-1	5403	0	5093
电力/KW·h·(t甲醇) ^-1	548	651	612
产品成本/CNY·t ^-1	1840	1732	1936

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气煤联供实现资源高效利用和碳减排技术进展

Review on coal and gas co-feed processes for better resource use and lower carbon emission

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