Abstract

The kinetic patterns of the attainment of the equilibrium product composition in non-catalytic processes of partial oxidation and of steam and carbon dioxide reforming of hydrocarbons in the temperature range 1400–1800 K, characteristic of these processes, were analyzed. The need for such analysis is caused by the rapidly increasing consumption of natural gas as a chemical feedstock and by growing attention to environmental problems, in particular, to a decrease in СО₂ emissions or to partial CO₂ utilization. The forward and reverse water gas shift reactions (WGSRs) play an important role in approach to the equilibrium product composition in these processes. Analysis has shown that the elementary reactions characteristic of forward and reverse WGSRs start to play a significant role long before the equilibrium in the system is attained. Already in the intermediate steps of the process, the distribution of the major reaction products, Н₂, СО, Н₂О, and СО₂, almost corresponds to the equilibrium value of K_t = ([H₂][CO₂])/([CO][H₂O]), close to the WGSR equilibrium constant K_eq, and further conversion of the products occurs at K_t values close to K_eq.

中文翻译：

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烃类非催化转化产物的平衡组成

摘要

分析了在 1400-1800 K 温度范围内，烃类的部分氧化和蒸汽和二氧化碳重整的非催化过程中达到平衡产物组成的动力学模式，这些过程的特征是这些过程的特征。由于天然气作为化学原料的消耗量迅速增加，以及对环境问题的日益关注，特别是对 СО ₂排放量或部分 CO _{2排放量的减少，导致了对此类分析的需求}利用率。在这些过程中，正向和反向水煤气变换反应 (WGSR) 在接近平衡产物组成方面发挥着重要作用。分析表明，正向和反向 WGSR 的基本反应特征早在系统达到平衡之前就开始发挥重要作用。已经在该过程的中间步骤中，主要反应产物Н ₂、СО、Н ₂ О 和СО ₂的分布几乎对应于K _t = ([H ₂ ][CO ₂ ])的平衡值/([CO][H ₂ O])，接近WGSR平衡常数K _eq，并且产品的进一步转换发生在接近K _eq的K _t值处。