期刊
ENERGY & FUELS
卷 24, 期 5, 页码 2825-2829出版社
AMER CHEMICAL SOC
DOI: 10.1021/ef100064d
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资金
- National Nature Science Foundation of China [20976192]
- National Natural Science Foundation for Distinguished Young Scholars of China [20725620]
Large-pore fluidized catalytic cracking (FCC) catalysts, using polystyrene spheres as templates, were prepared. By adsorption equilibrium experiments, the Freundlich adsorption isotherm of Dagang vacuum residue oil fractions on the prepared FCC catalysts was established. The data of adsorption rate were obtained and the effective diffusion coefficient of the oil fractions in the catalyst particles was calculated to be 10(-9)-10(-8) cm(2)/s. The effective diffusion coefficient in the large-pore catalyst was 2-3 times larger than that in the conventional catalyst, and it decreased with the molecular weight of the oil fraction. This verified that, because of promotion of the diffusion rate of heavy oil caused by the larger pore size of the catalyst, the catalytic performance of a macroporous catalyst was better than the conventional catalyst.
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