TAILIEUCHUNG - Catalytic Cracking of Heavy Oil over Catalysts Containing Different Types of Zeolite Y in Active and Inactive Matrices

The effects of addition of alumina to the matrices of cracking catalysts containing different types of zeolite Y, on their cracking performance, were investigated using a micro activity test and two different feed oils. | 143 Applied Catalysis 38 1988 143-155 Elsevier Science Publishers . Amsterdam Printed in The Netherlands Catalytic Cracking of Heavy Oil over Catalysts Containing Different Types of Zeolite Y in Active and Inactive Matrices . OTTERSTEDT YAN-MING ZHU and J. STERTE Department of Engineering Chemistry I Chalmers University of Technology 412 96 Goteborg Sweden Received 3 July 1987 accepted 22 September 1987 ABSTRACT The effects of addition of alumina to the matrices of cracking catalysts containing different types of zeolite Y on their cracking performance were investigated using a micro activity test and two different feed oils. For the heavier feed oil the alumina addition resulted in a higher conversion at the same catalyst to oil ratio independent of the type of zeolite. This higher conversion was accompanied by a greater selectivity for coke and a lower selectivity for gasoline. For the lighter feed oil the effect of alumina addition on the total conversion was much less pronounced while the effects on the selectivity were similar to those observed using the heavier feed. The performance of the catalysts in a commercial fluid catalytic cracking unit is discussed in view of their coke forming tendencies and the heat balance of the cracker. INTRODUCTION In the past decade there has been a trend towards using heavier feedstocks in fluid catalytic cracking FCC . The composition of these heavy cuts have caused problems of different kinds. The pore structure of the zeolite in zeolite catalysts is too fine to allow fast diffusion of the large molecules present in these fractions. Typically these feeds have high contents of metals such as vanadium and nickel aromatics and compounds containing heteroatoms of nitrogen sulfur and oxygen. The effect of vanadium is primarily a decrease in catalyst activity while the major effect of nickel is a selectivity change reflected in increased coke and gas yields 1 . The high-boiling aromatics act as coke precursors and the .

• Báo cáo khoa học
• Catalytic cracking
• Inactive matrices
• Engineering Chemistry
• Aluminum chlorohydrate solutions
• Hydroprocessed mixture
• Zeolites in active
• Post synthesis design
• Hierarchical ZSM 5 materials
• Optimal catalytic performance
• The cracking of petroleum feedstock
• Chemical EngineeringScience
• Iron oxide catalyst
• Catalytic activity
• OrganicGeochemistry
• ChemicalEngineering
• Mesoporous materials
• Fluid catalytic cracking
• Nanoporous materials
• Zeolite catalysis
• Catalyst testing
• FCC additives
• Catalyst deactivation
• Công nghệ hóa
• Vegetable oil sludge
• HY catalyst
• Hóa hữu cơ
• Dầu hạt thực vật
• Journal of Chemistry
• Tungstophosphoric acid
• GC MS analysis
• Low density polyethylene (LDPE)
• TPA loaded kaolin catalysts
• Catalysts preparation
• FCC catalysts
• Structural properties
• Ammonia adsorbed
• Microporous Solids
• Economic evaluation
• Synthesis of nanozeolites
• Synthesis of nanofaujasite
• Qrganic solvents
• Crystallization medium
• Characterization of catalysts
• Model compound
• Oxide catalysts
• Steam atmosphere