Influence of Al2O3 Content in Pelletized SAPO-11 Molecular Sieves on Their Physicochemical Properties, Activity, and Selectivity in Hydroisomerization of n-Hexadecane
摘要
Abstract
The physicochemical properties of a series of pelletized SAPO-11 molecular sieves differing in the binder (Al2O3) content were characterized; their activity and selectivity were investigated in the hydroisomerization of n-hexadecane. An increase in the binder content from 20 to 60 wt % was found to decrease the specific micropore volume and increase the external specific surface area as well as the mechanical strength, activity, and selectivity of Pt-containing samples in the hydroisomerization of n-hexadecane. The study proposes the formulations of pelletized SAPO-11 that ensure mechanical (axial crushing) strength of 9.9 to 15.1 N/mm2 and the yield of C16 isomers up to 78% in the hydroisomerization of n-hexadecane.