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Nine-Lump Kinetic Study of Catalytic Pyrolysis of Gas Oils Derived from Canadian Synthetic Crude Oil


Affiliations
1 State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
 

Catalytic pyrolysis of gas oils derived from Canadian synthetic crude oil on a kind of zeolite catalyst was conducted in a confined fluidized bed reactor for the production of light olefins. The overall reactants and products were classified into nine species, and a nine-lump kinetic model was proposed to describe the reactions based on appropriate assumptions. This kinetic model had 24 rate constants and a catalyst deactivation constant. The kinetic constants at 620°C, 640°C, 660°C, and 680°C were estimated by means of nonlinear least-square regression method. Preexponential factors and apparent activation energies were then calculated according to the Arrhenius equation. The apparent activation energies of the three feed lumps were lower than those of the intermediate product lumps.The nine-lump kinetic model showed good calculation precision and the calculated yields were close to the experimental ones.
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  • Nine-Lump Kinetic Study of Catalytic Pyrolysis of Gas Oils Derived from Canadian Synthetic Crude Oil

Abstract Views: 74  |  PDF Views: 1

Authors

Rui Zhang
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Li Li
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Zhichang Liu
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Xianghai Meng
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Abstract


Catalytic pyrolysis of gas oils derived from Canadian synthetic crude oil on a kind of zeolite catalyst was conducted in a confined fluidized bed reactor for the production of light olefins. The overall reactants and products were classified into nine species, and a nine-lump kinetic model was proposed to describe the reactions based on appropriate assumptions. This kinetic model had 24 rate constants and a catalyst deactivation constant. The kinetic constants at 620°C, 640°C, 660°C, and 680°C were estimated by means of nonlinear least-square regression method. Preexponential factors and apparent activation energies were then calculated according to the Arrhenius equation. The apparent activation energies of the three feed lumps were lower than those of the intermediate product lumps.The nine-lump kinetic model showed good calculation precision and the calculated yields were close to the experimental ones.