Hydrocarbon reforming route has gained immense attention for producing energy-effective renewable fuels and/or chemicals in the recent era. In this simulation study, O₂ addition and CH₄ recycling's effect on the dry oxidative reforming reactor's performance was investigated. Aspen HYSYS simulation software was used to assess a biogas-to-syngas conversion process's feasibility by integrating with the CH₄ recycling loop and CO₂ sequestration in a dry oxidative reforming process. Simulation runs were performed by varying the O₂/CH₄ ratio content from 0 to 0.20 and temperature (450 to 700°C). Results illustrated that CH₄ conversion improved by re-injecting of unreacted CH₄, followed by CO₂ sequestration to a great extent. In dry oxidative reforming, at stoichiometry O₂/CH₄ ratio of 0.17, CH₄ conversion (21.7%), and CO₂ conversion (3.3%) were obtained at 500°C, with 1.2 H₂/CO ratio. Further, 0.308 kg mole/h of H₂ could be produced with biogas (1.0 kg mole/h) at optimal parameters 500°C (temperature) and 0.17 (O₂/CH₄ ratio) by using recycling loop in one cycle. Thus, dry oxidative reforming coupled with the CH₄ recycling unit provides a better option for syngas/H₂ production and remarkably addresses high energy demand in the dry reforming process.

中文翻译：

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使用 Aspen HYSYS 对 CO2 封存的沼气氧干重整进行热力学平衡分析

近年来，碳氢化合物重整路线在生产节能的可再生燃料和/或化学品方面受到了极大的关注。在该模拟研究中，研究了O ₂添加和CH ₄再循环对干式氧化重整反应器性能的影响。Aspen HYSYS 模拟软件通过与干式氧化重整过程中的 CH ₄再循环回路和 CO ₂封存相结合，用于评估沼气到合成气转化过程的可行性。通过将 O ₂ /CH ₄比率含量从 0 改变到 0.20 和温度（450 到 700°C）来进行模拟运行。结果表明 CH ₄通过重新注入未反应的 CH ₄，随后在很大程度上封存CO ₂来提高转化率。在干式氧化重整中，在0.17 的化学计量比 O ₂ /CH ₄下，CH ₄转化率 (21.7%) 和 CO ₂转化率 (3.3%) 在 500°C 下获得，H ₂ /CO 比为 1.2 。此外，通过在一个循环中使用循环回路，在最佳参数500°C（温度）和0.17（O ₂ /CH ₄比率）下，可以用沼气（1.0 kg mol/h）生产0.308 kg mol/h的H ₂。因此，干式氧化重整与 CH ₄回收装置相结合为合成气/H 提供了更好的选择₂生产，并显着解决了干重整过程中的高能量需求。