Carbon emission reduction accounting and competitiveness analysis of green hydrogen-coupled coal-to-methanol process

YANG Guoqing; YANG Jucai; LV Yanli; LIU Mingqi; HU Uudam; WANG Haiyan; HUO Yaoqiang; LIU Jianguo

doi:10.12434/j.issn.2097-2547.20240288

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Carbon emission reduction accounting and competitiveness analysis of green hydrogen-coupled coal-to-methanol process

更新时间：2025-04-27

- Carbon emission reduction accounting and competitiveness analysis of green hydrogen-coupled coal-to-methanol process
- Vol. 50, Issue 4, Pages: 107-112(2025)
- 作者机构：
  
  1.内蒙古工业大学资源与环境工程学院环境污染控制与修复内蒙古自治区高等学校重点实验室，内蒙古呼和浩特 010051
  2.内蒙古自治区生态环境低碳发展中心，内蒙古呼和浩特 010050
  3.呼和浩特市生态环境监控中心，内蒙古呼和浩特 010010
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240288
  CLC： TQ223.121
- Received：05 July 2024，
  
  Revised：2024-08-22，
  
  Published：25 April 2025
- 稿件说明：
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杨国庆,杨桔材,律严励等.绿氢耦合煤制甲醇碳减排量核算及竞争力分析[J].低碳化学与化工,2025,50(04):107-112.

YANG Guoqing,YANG Jucai,LV Yanli,et al.Carbon emission reduction accounting and competitiveness analysis of green hydrogen-coupled coal-to-methanol process[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):107-112.
杨国庆,杨桔材,律严励等.绿氢耦合煤制甲醇碳减排量核算及竞争力分析[J].低碳化学与化工,2025,50(04):107-112. DOI： 10.12434/j.issn.2097-2547.20240288.

YANG Guoqing,YANG Jucai,LV Yanli,et al.Carbon emission reduction accounting and competitiveness analysis of green hydrogen-coupled coal-to-methanol process[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):107-112. DOI： 10.12434/j.issn.2097-2547.20240288.

摘要

煤制甲醇生产过程伴随着大量二氧化碳排放，绿氢耦合煤化工技术可以有效降低煤化工过程碳排放，但其中存在的技术问题和经济效益未经有效评估。基于调研数据，构建了绿氢耦合煤制甲醇工艺二氧化碳排放的核算体系，并分析了绿氢耦合技术在低碳排放背景下的技术竞争力。结果表明，绿氢耦合煤制甲醇工艺通过再生能源制氢、制氧，可省去原有CO变换、空气分离工序。以某60 × 10

t/a煤制甲醇项目为例，采用传统煤制甲醇工艺二氧化碳排放量为205.94 × 10

t/a，采用绿氢耦合煤制甲醇工艺二氧化碳排放量为60.94 × 10

t/a，二氧化碳排放量相较减少了约70%。随着国家对新能源产业的大力支持，以及能源转型战略的快速推进，当绿电价格下降到0.15 CNY/(kW·h)，绿氢耦合煤制甲醇产品成本约为2883.33 CNY/t，与传统工艺产品成本相当。若未来电价持续走低并辅以碳税征收，绿氢耦合煤制甲醇工艺的经济优势将逐步体现。本研究可为“双碳”目标下煤化工行业实现净零碳排放提供参考。

Abstract

The coal-to-methanol production process is accompanied by significant carbon dioxide (CO

) emissions. Green hydrogen-coupled coal chemical technology can effectively reduce carbon emissions in coal chemical processes

yet the associated technical challenge

s and economic benefits have not been adequately assessed. Based on survey data

an accounting system for CO

emissions in the green hydrogen-coupled coal-to-methanol process was established and the technological competitiveness of green hydrogen coupling under the low-carbon emission context was analyzed. The results indicate that the green hydrogen-coupled coal-to-methanol process

utilizing renewable energy for hydrogen and oxygen production

eliminates the need for the original CO conversion and air separation steps. For a 60 × 10

t/a coal-to-methanol project

the CO

emissions of the traditional coal-to-methanol process amount to 205.94 × 10

t/a

whereas the green hydrogen-coupled process reduces emissions to 60.94 × 10

t/a

a reduction of approximately 70%. With strong national support for the renewable energy industry and rapid advancement of the energy transition strategy

when the price of green electricity decreases to 0.15 CNY/(kW·h)

the cost of green hydrogen-coupled coal-to-methanol production is approximately 2883.33 CNY/t

comparable to the cost of traditional processes. If electricity prices continue to decline and are accompanied by carbon tax implementation

the economic advantages of the green hydrogen-coupled coal-to-methanol process will gradually emerge. This study can provide a reference for achieving net-zero carbon emissions in the coal chemical industry under the “carbon peaking and carbon neutrality” goals.

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