Hydrocrack petroleum residua

CATALYST TECHNOLOGY FOR REACTORS USED TO HYDROCRACK PETROLEUM RESIDUA... 

In this paper, the phenomena occuring in catalysts used to hydrocrack petroleum residua are discussed. Reaction sites are provided by the catalyst sulphide phase (Mo is the majority cation) and by the catalyst oxide phase (A1 is the majority cation). The influence of the promoter cations (typically Co or Ni) is also described. The catalyst is deactivated by coke and by metals. Furthermore, the reaction rate is often controlled by the rate of diffusion of the large carbonaceous molecules in the residua. All of these factors have been considered in mathematical simulations of the phenomena occuring in the catalyst. 

Yang, C., Zheng, H., Du, R, Xu, C. 2011. Reaction Characteristics and Mechanism of Residuum Hydrocracking, University of Petroleum, State Key Laboratory of Heavy Oil Processing, http //www.anl.gOv/PCS/acsfuel/preprint%20archive/Files/43 3 BOSTON 08-98 0668. pdf (accessed on October 5, 2011). 

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