This work investigates the effect of CO₂ in pyrolysis of brown coal (also referred to as lignite). CO₂ changes the distribution of pyrolytic products of brown coal. More CO is generated for the pyrolysis of brown coal in CO₂ than that in N₂. Differential scanning calorimeter (DSC) experiments show that the pyrolysis of brown coal in CO₂ is more exothermic than that in N₂. This may indicate that the enhanced generation of CO is attributed to an enhanced thermal cracking induced by CO₂. The more generation of CO for the reaction in CO₂ (4.2 mol.% at 700 °C) than in N₂ (0.5 mol.% at 700 °C) is a result of shifting carbon distribution from condensable hydrocarbons (e.g., tar) to CO. In addition, more CO is generated from the pyrolysis of brown coal in CO₂ than pyrolysis of sub-bituminous coal. This study signifies that low-rank coal can be effectively used as an energy source when CO₂ is employed during pyrolysis process.

这项工作研究了CO ₂在褐煤（也称为褐煤）热解中的作用。CO ₂改变了褐煤热解产物的分布。在褐煤中，CO ₂中产生的CO比N _2中产生的CO更多。差示扫描量热仪（DSC）实验表明，褐煤在CO ₂中的热解比N _2中的放热大。这可能表明，CO产生的增加归因于由CO ₂引起的热裂解的增加。在CO _2中（700°C下为4.2 mol％）比在N _2中生成更多的CO（在700°C下为0.5 mol。％）是碳分布从可冷凝碳氢化合物（例如焦油）转移到CO的结果。此外，褐煤在CO _2中的热解比亚烟煤的热解产生更多的CO。煤炭。这项研究表明，在热解过程中采用CO ₂时，低阶煤可以有效地用作能源。