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首页> 外文期刊>Fuel >Emission of hydrogen gas from weathered steam coal piles via formaldehyde as a precursor I. Oxidative decomposition of formaldehyde catalyzed by coal - batch reactor studies
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Emission of hydrogen gas from weathered steam coal piles via formaldehyde as a precursor I. Oxidative decomposition of formaldehyde catalyzed by coal - batch reactor studies

机译：风化蒸汽煤堆中以甲醛为前体释放氢气I.煤-间歇反应器研究甲醛的氧化分解。

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摘要

Molecular hydrogen is formed as a result of low temperature (40 deg C - 115 deg C) weathering of steam (bituminous) coal which occurs during relatively long term storage periods of coal piles. It is observed that formaldehyde is the precursor intermediate (formaldehyde was suggested as one of the ambient temperature oxidation products of coal). The study of the thermal decomposition of formaldehyde in batch reactors has shown that the decomposition reaction occurs only in the presence of oxygen and bituminous coal (the catalyst). The stoichiometric reaction observed, is the coal catalyzed oxidative decomposition of formaldehyde: 2CH_2O + O_2 (coal →) 2CO_2 + 2H_2 This is in contrast with the commonly observed chemical behavior of formaldehyde as hydrogen donor upon decomposition to yield carbon monoxide as a product. A possible mechanism by which the coal catalyzed oxidative decomposition of formaldehyde occurs is suggested and discussed in detail.
机译：蒸汽（烟煤）的低温（40℃-115℃）风化的结果是形成了分子氢，这发生在煤堆的相对长期存储期间。观察到甲醛是前体中间体（建议甲醛是煤的环境温度氧化产物之一）。对间歇式反应器中甲醛热分解的研究表明，分解反应仅在氧气和烟煤（催化剂）存在下发生。观察到的化学计量反应是煤催化的甲醛的氧化分解：2CH_2O + O_2（煤→）2CO_2 + 2H_2。这与通常观察到的甲醛分解为氢供体以产生一氧化碳产物的化学行为相反。提出并详细讨论了煤催化甲醛发生氧化分解的可能机理。

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