To reveal the effect mechanism of CO atmosphere on coal pyrolysis, a study on raw and demineralized lignite was carried out in a horizontal tube furnace under N₂ and CO/N₂ atmosphere. CO had a negligible effect on the char yield at low temperatures, whereas it enhances the char yield at temperatures higher than 550 °C. The release of tar was higher in the presence of CO above 450 °C because of more free radicals, which reduced low‐temperature crosslinking, and higher selectivity of hydroxyl groups to phenols in the CO‐containing atmosphere. The yields of CO₂ and H₂ increased, water and CO yields decreased under CO/N₂ atmosphere. Light hydrocarbon gases were not affected by changing the reaction atmosphere. The difference between product yields from raw and demineralized coal confirmed that the catalysis of inherent minerals had a great catalytic effect on the water‐gas shift reaction and Boudouard reaction.

中文翻译：

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一氧化碳气氛对典型褐煤热解的影响

为了揭示CO气氛对煤热解的影响机理，在水平管式炉中，在N ₂和CO / N ₂气氛下，对褐煤原料和软化褐煤进行了研究。在低温下，CO对焦炭收率的影响可忽略不计，而在高于550°C的温度下，CO提高了焦炭收率。在高于450°C的CO下，焦油的释放量更高，这是因为更多的自由基减少了低温交联，并且在含CO的气氛中羟基对苯酚的选择性更高。在CO / N ₂条件下，CO ₂和H ₂的产率增加，水和CO的产率降低大气层。轻烃气体不受反应气氛变化的影响。原煤和软煤的产品产量之间的差异证实，固有矿物的催化作用对水煤气变换反应和Boudouard反应有很大的催化作用。