Supercritical water partial oxidation (SCWPO) is a clean and efficient coal conversion method to produce H2. However, the detailed SCWPO mechanism of coal is still unknown at present. In this paper, a lumped kinetic model is used to propose a non-catalytic SCWPO mechanism of coal. The results show that oxidation reaction of intermediate carbon is under diffusion control. Bituminous coal is harder to be gasified than lignite, due to the denser structure of bituminous coal. CH4 is produced only from coal pyrolysis, and it is negligible for steam reforming of CH4 without catalyst. The ash in coal plays a certain catalysis on water-gas shift reaction. The proposed mechanism provides important insights in SCWPO process of coal.

中文翻译：

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煤的非催化超临界水部分氧化机理


超临界水部分氧化 （SCWPO） 是一种清洁高效的煤转化方法 H2。然而，煤炭的详细 SCWPO 机制目前仍不清楚。在本文中，使用集总动力学模型提出了煤的非催化 SCWPO 机制。结果表明，中间碳的氧化反应受到扩散控制。由于烟煤的结构更致密，烟煤比褐煤更难气化。CH4 仅由煤热解产生，在没有催化剂的情况下，CH4 的蒸汽重整可以忽略不计。煤中的灰分对水气变换反应起一定的催化作用。所提出的机制为煤的 SCWPO 过程提供了重要的见解。