氧对丙烷脱氢反应体系影响的热力学分析  

Thermodynamic analysis of effects of oxygen addition on dehydrogenation of propane

作　　者：林少波[1] 单玉领 隋志军[1] 朱贻安[1] 李平[1] 周兴贵[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《化工进展》2015年第4期970-975,1006,共7页Chemical Industry and Engineering Progress

基　　金：国家863计划(2012AA040306);国家自然科学基金(21276077;21376076);中央高校基本科研业务费专项资金(WG1213011;WA1313006)项目

摘　　要：针对丙烷氧化脱氢和脱氢氧化两种反应体系进行了热力学分析,并与无氧丙烷脱氢体系进行了比较。考虑了丙烷裂解、部分氧化和深度氧化过程的27种产物,应用Aspen模拟软件,计算了体系压力为0.1MPa、温度范围为300~700℃的等温等压吉布斯平衡反应器内的各物质含量,讨论了进料氧气/丙烷摩尔比对目的产物丙烯产量及产物组成分布的影响。结果表明,无论先加氧脱氢,还是脱氢后再加氧反应,氧气加入对丙烯生成都非常不利,反应温度越高、氧气加入量越大,丙烯平衡生成量就越少,原料损耗也越严重;最主要的副产物是甲烷和一氧化碳,而非二氧化碳和水。The thermodynamics of both oxidative dehydrogenation and dehydrogenation-oxidation of propane were analyzed and compared with that of simple dehydrogenation of propane. Twenty seven products from the reactions of cracking,partial oxidation and deep oxidation of propane were taken into consideration. The molar fractions of the feed and the products in the Gibbs reactor under isotonic and isothermal conditions were calculated by using Aspen Plus simulation software. The effects of oxygen addition on the molar fraction of target product propylene and the composition of other products under pressure of 0.1MPa and in the temperature range of 300—700℃ were discussed. For whichever propane dehydrogenation system,i.e. adding oxygen before or after the dehydrogenation, addition of oxygen was extremely harmful to production of propylene. The higher the temperature and the larger the oxygen addition amount,the less the propylene production and the greater the feed loss. The major byproducts were CH4 and CO rather than CO2 and H2O.

关 键 词：烷烃 氧化 脱氢 丙烯 热力学 

分 类 号：TQ021.2[化学工程]