摘要
利用小型固定流化床试验装置，考察了混合C4烃在催化剂LTA上的低温芳构化反应。试验结果表明，混合C4烃中的C4烯烃得到有效转化，可低温芳构化生产高辛烷值汽油组分。反应温度和重时空速对混合C4烃低温芳构化反应的产品分布、气体组成、汽油组成和辛烷值等有一定影响。反应温度不仅影响C4烯烃的芳构化活性，而且也影响芳构化反应历程，较低温度（340～360℃）下芳烃主要通过氢转移生成，而在较高温度（360～390℃）下，脱氢反应成为芳烃生成的主要途径。增加空速会使催化剂含碳量增加，加速催化剂的失活，降低C4烯烃的芳构化反应性能。较高的反应温度和较低的重时空速有利于生成高辛烷值汽油组分。
The aromatization of mixed C4 hydrocarbons over a LTA catalyst at low reaction temperature（340-390℃）was investigated using a fixed fluidized bed reactor. The experimental results showed that C4 olefins in mixed C4 hydrocarbons were catalytically converted to high-octane gasoline components. The reaction temperature and space velocity had significant effects on product slates, gas compositions, the group compositions of gasoline component and corresponding octane numbers. Reaction temperature not only influenced the aromatization reactivity of C4 olefins, but also had impacts on the reaction mechanism. Hydrogen transfer reaction and dehydrogenation reaction were the main reaction routes to form aromatics at lower temperature zone（340-360℃）and higher temperature zone（360-390℃） ,respectively. Deactivation of catalyst might be caused by the increase of space velocity since more coke was deposited on the catalyst. Thus,relatively higher reaction temperature and lower space velocity were preferred to form high-octane gasoline components.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2007年第3期5-9,共5页
Petroleum Processing and Petrochemicals
关键词
混合C4烃
低温
芳构化
辛烷值
mixed C4 hydrocarbon
low temperature
aromatization
octane number
