Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells,Industrial & Engineering Chemistry Research

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Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-28 , DOI: 10.1021/acs.iecr.1c02811
Qing Yang ₁ , Genyun Chu ₁ , Qingchun Yang _{1,

2} , Jinliang Zhang ₁ , Huairong Zhou ₃ , Dawei Zhang ₁

Affiliation

The conventional coal-to-ethylene glycol (CtEG) process is criticized for its high CO₂ emissions. Because most CtEG projects are located in areas rich in renewable energy such as wind energy and solar energy, two novel green hydrogen-assisted CtEG processes are proposed and analyzed by the integration of solid oxide electrolysis cell (SOEC) technology: the CtEG process integrated with the SOEC technology of only steam electrolysis (SOEC-CtEG) and that of steam and carbon dioxide electrolysis (CoSOEC-CtEG). The effects of the operating temperature, current density, and inlet gas composition on the electrochemical performance of the solid oxide steam electrolytic and coelectrolytic processes are investigated and compared based on their electrochemical and flowsheet-based models. The thermodynamic and technoeconomic advantages of the two proposed processes are manifested by comparison with a conventional process. The results show that the two proposed processes are promising because they increase the carbon utilization efficiency by 26.13 and 22.48%, increase the exergy efficiency by 14.82 and 17.34%, decrease the total capital investment by 23.60 and 19.38%, decrease the levelized production cost by 20.55 and 27.47%, and increase the internal rate of return by 8.85 and 9.18%. In addition, the sensitivity analysis results show that the two proposed processes have stronger antirisk ability than the conventional process.

中文翻译：

煤制乙二醇工艺与固体氧化物电解槽不同集成方法的工艺开发和技术经济分析

传统的煤制乙二醇 (CtEG) 工艺因其高 CO ₂排放。由于大多数 CtEG 项目位于风能和太阳能等可再生能源丰富的地区，因此结合固体氧化物电解槽 (SOEC) 技术提出并分析了两种新型绿色氢辅助 CtEG 工艺：CtEG 工艺与SOEC 技术只有蒸汽电解（SOEC-CtEG）和蒸汽和二氧化碳电解（CoSOEC-CtEG）。基于电化学和基于流程图的模型，研究和比较了操作温度、电流密度和入口气体成分对固体氧化物蒸汽电解和共电解过程电化学性能的影响。与传统工艺相比，这两种提议工艺的热力学和技术经济优势得以体现。结果表明，这两种工艺是有前景的，因为它们将碳利用效率提高了 26.13% 和 22.48%，火用效率提高了 14.82% 和 17.34%，总投资减少了 23.60% 和 19.38%，平均化生产成本降低了20.55 和 27.47%，并提高内部收益率 8.85 和 9.18%。此外，敏感性分析结果表明，提出的两种工艺比常规工艺具有更强的抗风险能力。18%。此外，敏感性分析结果表明，提出的两种工艺比常规工艺具有更强的抗风险能力。18%。此外，敏感性分析结果表明，提出的两种工艺比常规工艺具有更强的抗风险能力。

更新日期：2021-10-13

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