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Research on the Property and Cracking Ability of Modified REY Zeolite

Author: SuiShuHui
Tutor: HuWangMing
School: Zhejiang University
Course: Chemical Engineering
Keywords: Modified Ultra-stable Hydrothermal roasting Shen silicon Evaluate
CLC: O643.36
Type: Master's thesis
Year: 2005
Downloads: 209
Quote: 2
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Abstract


To further improve the the REY zeolite activity and hydrothermal stability , reduce production costs , developed a modified molecular sieve HAY . The molecular sieve by appropriate amount of precipitation in the NaY zeolite SiO 2 , the introduction of rare earth elements , and pass into the roasting process quantitative superheated steam to water heat roasting processing made ??by ion exchange . The FCC prepared by the molecular sieve catalyst for heavy oil cracking test, and achieved good results . In this paper, a modified the HAY molecular sieve preparation conditions and characterized by their physical properties . The study shows that the hydrothermal calcination treatment increased the molecular sieve zeolites , inhibition of macromolecules (RE-O-RE) 4 formation to most RE 3 from ultra- cage to the sodalite cage migration , help to improve the activity and stability of the molecular sieve ; adding the right amount of active SiO 2 can increase the degree of crystallinity of the molecular sieve , and adjustable amount of acid zeolites change distribution . The article also modified HAY molecular sieve catalyst performance . The study showed that : HAY molecular sieve prepared modified FCC catalyst compared with conventional REY zeolite catalyst has high activity , good activity and stability , and good resistance to carbon deposition characteristics . The small fixed fluidized bed evaluation showed that the modified HAY zeolite catalysts greatly improved product distribution and conversion rates can increase gasoline and diesel , to reduce heavy oil yield . Modified HAY the REY zeolite molecular sieve preparation process , the original pay two baking process simplification as an exchange with the roasting process , can greatly reduce the manufacturing cost of the molecular sieve .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalyst
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