Assessment of carbon capture and utilization in steelmaking: A case study using a hybrid fuel cell - gas turbine system

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2024-11-16 DOI:10.1016/j.ijhydene.2024.11.128

Elisângela Martins Leal , Natália Ribeiro

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引用次数: 0

Abstract

This paper investigates a carbon capture and utilization plant that converts steelmaking exhaust gases into valuable fuels. It examines the behavior of synthesis gas, identifies optimal operational parameters, and explores kinetics for methanol and ethanol production. Additionally, it examines the impact of varying H₂/CO, and H₂/CO₂ ratios and evaluates the efficiency of a hybrid system combining a solid oxide fuel cell (SOFC) and gas turbine (GT) powered by synthesized methanol. Using the Chemical Equilibrium with Applications software, the study analyzes the dynamic behavior of synthesis gas molar fractions within the water-gas shift reactor and Fischer Tropsch reactor. Optimal operational parameters were identified at a temperature range of 200–250 °C, pressure of 4.5 MPa, H₂/CO, and H₂/CO₂ ratios of 2.0, enabling efficient carbon conversion. Further exploration into the kinetics, alongside the commercial Cu/ZnO/Al₂O₃ catalyst in the Fischer Tropsch synthesis, supports methanol and ethanol production. Increased H₂/CO, and H₂/CO₂ ratios favor methanol production with lower carbon dioxide fractions, while ethanol production and CO₂ emissions decrease as these ratios rise. Finally, a case study incorporates exergoeconomic and exergoenvironmental analyses of a SOFC-GT hybrid system fuelled by methanol from Fischer Tropsch synthesis, where the combustor exhibits the lowest exergy efficiency (62.3%), while the fuel cell achieves an exergy efficiency of about 86.5%.

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评估炼钢过程中的碳捕集与利用：使用混合燃料电池-燃气轮机系统的案例研究

本文研究了将炼钢废气转化为有价值燃料的碳捕集与利用工厂。它研究了合成气的行为，确定了最佳运行参数，并探讨了甲醇和乙醇的生产动力学。此外，它还研究了不同 H2/CO 和 H2/CO2 比率的影响，并评估了由合成甲醇驱动的固体氧化物燃料电池 (SOFC) 和燃气轮机 (GT) 混合系统的效率。研究使用化学平衡与应用软件分析了水-气变换反应器和费托合成反应器中合成气摩尔分数的动态行为。研究确定了最佳操作参数，温度范围为 200-250 °C，压力为 4.5 兆帕，H2/CO 和 H2/CO2 比率为 2.0，从而实现了高效的碳转化。在费托合成中使用商用 Cu/ZnO/Al2O3 催化剂的同时，还对动力学进行了进一步探索，以支持甲醇和乙醇的生产。H2/CO 和 H2/CO2 比率的增加有利于甲醇的生产，同时降低二氧化碳的馏分，而乙醇的生产和二氧化碳的排放则随着这些比率的增加而减少。最后，案例研究结合了以费托合成甲醇为燃料的 SOFC-GT 混合系统的能效经济和能效环境分析，其中燃烧器的能效最低（62.3%），而燃料电池的能效约为 86.5%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.