Abstract

This review provides an analysis of prior research on liquid-media methane pyrolysis for hydrogen production. It discusses the experimental studies and reported data on methane pyrolysis in molten metals, molten binary alloys, molten salts, and molten metal–salt media. The experimental data suggest that binary metal alloys are superior to pure metals in terms of catalytic performance. A comparative assessment of catalytic activity showed that the highest performance (methane conversion above 95% at temperatures below 1200°C) has been achieved by molten Ni–Bi and Cu–Bi alloys. Besides the thermobaric conditions and characteristics of the bubbling systems, the media’s reactivity plays a key role in pyrolysis efficiency. The combined use of molten metals and salts as a reaction medium noticeably enhances the methane conversion (due to the catalytic activity of molten metals) and appreciably reduces the content of metal impurities in the carbon product.

中文翻译：

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熔融介质中甲烷热解制氢：当前进展回顾

摘要

本综述对液体介质甲烷热解制氢的先前研究进行了分析。它讨论了熔融金属、熔融二元合金、熔融盐和熔融金属盐介质中甲烷热解的实验研究和报告数据。实验数据表明，二元金属合金在催化性能方面优于纯金属。催化活性的比较评估表明，熔融 Ni-Bi 和 Cu-Bi 合金实现了最高性能（在低于 1200°C 的温度下甲烷转化率高于 95%）。除了鼓泡系统的温压条件和特性之外，介质的反应性对热解效率也起着关键作用。熔融金属和盐作为反应介质的组合使用显着提高了甲烷转化率（由于熔融金属的催化活性）并明显降低了碳产品中金属杂质的含量。