重质油窄馏分的HDS和HDN反应动力学特性

用破碎的工业加氢裂化催化剂Ｎｉ－Ｍｏ／Ａｌ２Ｏ３，在１００ｍｌ的高压反应釜内，对３种不同渣的超临界流体萃取分馏的窄馏分进行氢处理，建立了釜式反应器内渣油催化加氢脱硫和加氢脱氮反应的扩散－反应动力学模型，讨论了渣油窄馏分的扩散和加氢转化反应动力学特性。

CHARACTERISTICS ON HDS AND HDN KINETICS OF NARROW FRACTIONS FROM RESIDUA

The SFEF fractions of three vacuum residua were catalytically hydroprocessed in a 100 ml autoclave with crushed commercial Ni Mo catalyst HDS and HDN can be treated as the first order irreversible reactions and the diffusion of macromolecule in catalyst micropore filled with liquid belongs to configuration diffusion The HDS and HDN diffusion reaction model of residue in autoclave reactor was established The intrinsic and apparent rate constants of HDS and HDN reaction obtained in terms of the kinetic model decrease quickly and reach to stable values with the increase of mean relative molecular mass HDN rate constant declines faster than that of HDS, but the effective factor of HDS decreases more quickly than that of HDN It means that the low conversion of HDS and HDN reaction for heavier SFEF fractions could be ascribed to the poorer reactivity and the stronger diffusion resistance The heavier the SFEF fraction, the larger the molecular size, and the severer the effect of diffusion on the reaction