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