Chemical Industry and Engineering Progress ›› 2021, Vol. 40 ›› Issue (11): 6061-6070.DOI: 10.16085/j.issn.1000-6613.2020-2341

• Energy processes and technology • Previous Articles     Next Articles

Development and system assessment of a coal-to-ethylene glycol process coupled with SOEC

YANG Qingchun1,2(), YANG Qing1(), ZHANG Jinliang1, GAO Minglin2, MEI Shumei2, ZHANG Dawei1()   

  1. 1.School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
    2.Anhui HaoYuan Chemical Group Co. , Ltd. , Fuyang 236023, Anhui, China
  • Received:2020-11-23 Revised:2020-12-20 Online:2021-11-19 Published:2021-11-05
  • Contact: ZHANG Dawei

耦合SOEC的煤制乙二醇新工艺开发与系统评价

杨庆春1,2(), 杨庆1(), 张金亮1, 高明林2, 梅树美2, 张大伟1()   

  1. 1.合肥工业大学化学与化工学院,安徽 合肥 230009
    2.安徽昊源化工集团有限公司, 安徽 阜阳 236023
  • 通讯作者: 张大伟
  • 作者简介:杨庆春(1990—),男,博士,讲师。E-mail:ceqcyang@hfut.edu.cn。|杨庆春(1990—),男,博士,讲师。E-mail:ceqcyang@hfut.edu.cn
  • 基金资助:
    安徽省自然科学基金(JZ2019AKZR0236)

Abstract:

Traditional coal-to-ethylene glycol process is criticized by the problems of high CO2 emissions and low resource utilization efficiency. To address these issues, this paper proposed a novel coal-to-ethylene glycol process coupled with solid oxide electrolytic cells (SO-CtEG). Since the novel process is integrated with the solid oxide electrolytic cells for hydrogen production technology, the water gas shift and air separation units are avoided. In addition, the processing scale of the coal gasification and acid gas removal units is also effectively reduced. According to the modeling and simulation results of the whole SO-CtEG process, techno-economic analysis and sensitivity analysis were conducted in detail. The results show that the carbon utilization efficiency and exergy efficiency of the novel SO-CtEG process are 2.16 times and 1.48 times of the traditional coal-to-ethylene glycol process, respectively. Moreover, compared with the traditional coal-to-ethylene glycol process, the total capital investment and total production cost of the novel SO-CtEG process are reduced by 23.64% and 17.14%, respectively, as well as the internal rate of return is increased by 8.85%. Since the novel process can utilize the energy of wind and light, reduces the carbon emissions of traditional coal-to-ethylene glycol process, and has better technical, economic and environmental performance, it is a promising direction for the coal-to-ethylene glycol industry in the future.

Key words: coal to ethylene glycol, solid oxide electrolytic cells (SOEC), carbon reduction, simulation, techno-economic analysis

摘要:

针对传统煤制乙二醇过程CO2排放高和资源利用率低等问题,本文提出了一种耦合固体氧化物电解池(SOEC)的煤制乙二醇新工艺(SO-CtEG)。新工艺通过集成固体氧化物电解池制氢技术,避免了水煤气变换单元和空分单元,也有效降低了煤气化和酸性气体脱除单元的处理规模。在全流程建模与模拟的基础之上,进行了详细的技术经济分析与灵敏度分析。结果表明,SO-CtEG新工艺的碳元素利用效率和?效率分别是传统煤制乙二醇项目的2.16倍和1.48倍。与传统煤制乙二醇过程相比,SO-CtEG新工艺总投资费用降低23.64%、生产成本节约17.14 %,内部收益率提高8.85%。因此,新工艺不但可以提高风光消纳能力和减少传统煤制乙二醇的碳排放,还具有更佳的技术经济环境性能,是未来煤制乙二醇行业具有良好发展前景的工艺路线之一。

关键词: 煤制乙二醇, 固体氧化物电解池, 碳减排, 模拟, 技术经济分析

CLC Number: 

京ICP备12046843号-2;京公网安备 11010102001994号
Copyright © Chemical Industry and Engineering Progress, All Rights Reserved.
E-mail: hgjz@cip.com.cn
Powered by Beijing Magtech Co. Ltd