Transformation of plant oils in catalytic cracking

Abstract

Effect of zeolite catalyst composition, the process conditions, the nature of oil on the distribution of products at their targeted transformations under catalytic cracking conditions was studied. The study was conducted on bizeolite catalysts containing zeolites – ultrastable Y and ZSM-5 in various proportions, and on the catalyst LUX where 18 wt.% of zeolite Y in HREY form. It is shown that the presence of ZSM-5 zeolite in the catalyst promotes the formation of С2–С4 olefins. Increased rigidity of the cracking process (increase temperature and the ratio of catalyst : feed) increases the yields of gaseous products and coke, while reducing the gasoline fraction. Effect of the nature of vegetable oils was studied on the example of palm, rapeseed, mustard and sunflower oils. It is shown that the maximum yield of С2–С4 olefins and gasoline have to use oils with a high content of saturated fatty acids. The laws of the joint cracking of sunflower oil and vacuum gasoil. It’s found that the total conversion of the feed mix and yield of the gasoline fraction increase at a joint cracking; maximum effect is achieved by adding 3–10 wt.% vegetable oil.