临氧条件下的轻烃催化裂化反应研究  

Study on Catalytic Cracking Reaction of Light Hydrocarbons under Oxidative Conditions.

作　　者：王林胜[1] 徐奕德[1] 陶龙骧[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《石油与天然气化工》1996年第4期188-189,共2页Chemical engineering of oil & gas

摘　　要：本文报道了轻烃临氧条件下催化裂化转化成乙烯和丙烯的反应途径，并探讨了气相氧在裂化反应中的作用。在临氧条件下，丙烷可通过脱氢二聚再裂化生成乙烯，乙烯选择性可达到４５％，氧的存在使该反应由热力学上不利变为有利。此外气相氧可提高正己烷转化率，乙烯和丙烯产物选择性，氧的作用在于促进烷烃脱氢并引发碳－碳键断裂反应。The reaction processes for propane, i-butene, and hexane cracking under oxidative conditions are Studied, together with the function of gaseous oxygen on cracking reaction. In the presence of oxygen, Profane cracking toethylene may proceed through firstly oxidative dehydrthdimerhation and then cracking,With an ethylene Selectivity of ashigh as 45 %. Presence of oxygen turns the reaction from thermo-dynamically unfavorable to favorable. In addition,oxygen in the gas phase may lead to an increase in he-cane conversion and selectivity of athylene and propene products. Thefunction of oxygen is to promote the dehydrogenation of alkanes and initiate the carbon-carbon bond bteakdown reaction ata much lowet temperature.

关 键 词：轻烃 临氧裂化 乙烯 丙烯 催化裂化 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]