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化工进展  2015 

氧对丙烷脱氢反应体系影响的热力学分析

DOI: 10.16085/j.issn.1000-6613.2015.04.012

Keywords: 烷烃,氧化,脱氢,丙烯,热力学

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Abstract:

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.

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