【摘要】 建立了一套可以同时进行吸热型碳氢燃料催化裂解研究和催化剂结焦评价的装置。选用SAPO 34、HZSM 5以及USY型不同孔径的分子筛催化剂对自行研制的吸热型碳氢燃料S 1进行催化裂解反应 ,采用注氧烧焦的方法考察了改变反应温度、反应时间等实验条件对催化剂结焦性能的影响 ,结果发现 ,当温度达到 70 0℃时 ,三种催化剂都有最大的结焦量 ,而USY型分子筛高达 5 5μL/mg。同时还考察了作为结焦母体的小分子烯烃在裂解产物中的分布与催化剂结焦的关系 ,对燃料S 1在三种分子筛上裂解结焦的规律有了初步的了解 ,从而为筛选适用于吸热型碳氢燃料催化裂解的催化剂提供了有力的依据。更多还原

【Abstract】 A set of chromatogram system has been set up, which can be applied both for catalytic cracking of endothermic hydrocarbon fuel and determination of coke on zeolites. Coke deposits produced by endothermic hydrocarbon fuel S-1 cracking on SAPO-34, HZSM-5 and USY were measured by using this equipment. Effects of cracking time and temperature on coke formation were studied, which shows long reaction time and high temperature are in favor of coke-deposit. Investigation was also carried out on the influence of olefin content on coke distribution on zeolites. Results show that compared with HZSM-5 and USY, SAPO-34 has lower conversion rate and yield of olefin. That is why it has lower coking quantity.更多还原