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首页> 外文期刊>Journal of power sources >Steam, dry and autothermal methane reforming for hydrogen production: A thermodynamic equilibrium analysis
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Steam, dry and autothermal methane reforming for hydrogen production: A thermodynamic equilibrium analysis

机译：氢气生产蒸汽，干燥和自热甲烷重整：热力学平衡分析

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Environmental issues of fossil fuels use in energy systems are boosting research in the field of H-2 generation. Although steam reforming is the most well-established process for H-2 production, alternative thermochemical routes are emerging.The paper aims to compare three reforming processes: steam methane reforming, dry methane reforming and autothermal methane reforming. To this end, a thermodynamic equilibrium model is developed and validated via comparison with literature data. The influence of operating conditions on the performance of the reforming options is investigated, addressing chemical and energy-related aspects. Regarding the former, attention is focused on H-2 yield and selectivity over CO and CO2. From the energy viewpoint, performance indices investigated include the lower heating value of syngas, the reformer thermal power requirement and the chemical energy increase of fuel at the reformer exit. An H-2 production efficiency is also evaluated to directly compare steam, dry and autothermal methane reforming.The study revealed that moderate pressures and oxidant-to-methane ratios allow finding the best compromise between H-2 production and process efficiency in all investigated reforming options; under these conditions, steam methane reforming performs better than dry methane reforming; however, when the reformer operates under autothermal conditions, the performance of dry methane reforming approaches that of steam methane reforming.
机译：化石燃料的环境问题在能量系统中使用的是在H-2代领域的促进研究。虽然蒸汽重整是H-2生产最熟悉的过程，但替代的热化学途径正在出现。纸张旨在比较三种重整过程：蒸汽甲烷重整，干燥甲烷重整和自热甲烷重整。为此，通过与文献数据的比较开发和验证了热力学平衡模型。调查，解决了化学和能源相关方面，研究了操作条件对改革选项性能的影响。关于前者，注意力集中在CO和CO2上的H-2产量和选择性。从能量观点来看，调查的性能指数包括合成气的较低的加热值，改革器热功率要求和重整器出口燃料的化学能量增加。还评估了H-2生产效率，直接比较蒸汽，干燥和自热甲烷重整。研究表明，中等压力和氧化剂 - 甲烷比允许在所有调查的重整中找到H-2生产和过程效率之间的最佳折衷选项;在这些条件下，蒸汽甲烷重整比干甲烷重整更好;然而，当重整器在自热条件下运作时，干燥甲烷重整的性能接近蒸汽甲烷重整。

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