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Process modeling, simulation, and technical analysis of coke-oven gas solid oxide fuel cell integrated with anode off-gas recirculation and CLC for power generation

机译：集成了阳极废气再循环和CLC的焦炉气固体氧化物燃料电池的过程建模，仿真和技术分析

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摘要

In order to improve the thermal efficiency of coke-oven gas power generation, this work establishes electrochemical and thermodynamic models for a novel process of coke-oven gas fueled solid oxide fuel cell integrated with its anode off-gas recirculation and chemical looping combustion. It begins with a traditional process with all anode off-gas combusted with air in an after burner for heat recovery, which suffers from higher steam consumption, lower power generation, and higher CO2 emissions. Key operating parameters of the steam/COG ratio of steam methane reforming, fuel utilization factor and recycle ratio of solid oxide fuel cell, as well as oxygen carrier and air inputs of chemical looping combustion are thoroughly analyzed and optimized for power generation of the proposed process. The net electricity generation for the novel and traditional processes are 315.8 and 290.7 MW per 500.3 MW of coke-oven gas consumption, respectively. Moreover, the exergy efficiency is improved from 56.4% to 63.1% and about zero direct CO2 emissions is achieved in the novel process.
机译：为了提高焦炉煤气发电的热效率，这项工作建立了一种以焦炉煤气为燃料的固体氧化物燃料电池及其阳极废气再循环和化学循环燃烧的新工艺的电化学和热力学模型。它从传统工艺开始，所有阳极废气在后燃烧器中与空气燃烧以回收热量，这会导致蒸汽消耗增加，发电量降低以及二氧化碳排放量增加。彻底分析和优化了关键工艺参数，包括蒸汽甲烷重整的蒸汽/ COG比，固体氧化物燃料电池的燃料利用率和再循环比，以及化学循环燃烧的氧气载体和空气输入，以优化该工艺的发电。每500.3 MW焦炉煤气消耗量，新工艺和传统工艺的净发电量分别为315.8 MW和290.7 MW。此外，在新工艺中，火用效率从56.4％提高到63.1％，并且实现了约零的直接CO2排放。

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