摘要
焦炉煤气非催化热重整,转化为合成气是一条有效的资源化路线。焦炉煤气重整涉及多种化学物质,反应复杂。本文针对焦炉煤气中关键代表组分的重整,进行相关反应的化学热力学平衡常数分析,推断有机烃的转化率和合成气组成。研究发现,焦炉煤气中甲烷重整反应的平衡常数较小,只有提高温度至1 200℃以上,才能保证甲烷转化。在O2、水蒸气混合气氛中,反应温度达到1 000℃以上,上述有机烃类几乎完全转化;荒煤气中加入O2可以提高反应温度,提升化学反应速率。在焦炉煤气热重整体系中,维持一定的温度和水蒸气浓度,荒煤气中的有机组成可以完全转化为合成气,化学反应热力学并不是重整反应的限制因素。提升重整反应速度,突破反应动力学限制是工艺技术开发的关键。
Coke oven gas non-catalytic thermal reforming to synthesis gas is an effective resource route.Coke oven gas reforming involves many chemicals and the reaction is complex.The research work of this paper is to analyze the chemical thermodynamic equilibrium constants of the related reactions for the reforming of key representative components in coke oven gas,and infer the conversion rate of organic hydrocarbons and the composition of synthesis gas.The research shows that the equilibrium constant of methane reforming reaction in coke oven gas is small,and only by raising the temperature to above 1200℃can methane conversion be guaranteed.The reaction temperature reached above 1000℃in the mixed atmosphere of O2 and steam,and the organic hydrocarbons were almost completely converted.Adding O2 into raw gas can increase the reaction temperature and the chemical reaction rate.In the thermal reforming system of coke oven gas,the organic composition in raw gas can be completely converted into synthesis gas by maintaining a certain temperature and steam concentration,and the thermodynamics of chemical reaction is not the limiting factor of reforming reaction.It is the key to improve the speed of reforming reaction and break through the limitation of reaction kinetics.
作者
董靖
Dong Jing(Shanghai Electric Guokong Global Engineering Co.,Ltd.,Taiyuan Shanxi 030001,China)
出处
《山西化工》
CAS
2023年第11期70-72,共3页
Shanxi Chemical Industry
关键词
焦炉煤气
热重整
反应平衡
coke oven gas
thermal reforming
reaction equilibrium
