燃料化学学报2017，Vol.45Issue(5)：589-595,7.
无定形硅铝载体的酸性对费托蜡加氢裂化反应中柴油选择性的影响
Study of the relationship between the acidity of amorphous silica-alumina supports and diesel selectivity in Fischer-Tropsch wax hydrocracking
摘要
Abstract
Three amorphous silica-alumina supports with similar textural properties and different amounts of acidity were successfully synthesized through ammonium exchange processing and their structures,acidity properties and the coordination of Si and Al in the as-synthesized supports were characterized using XRD,N2 adsorption-desorption,NH3-TPD,Py-FTIR and NMR.Amorphous silica-alumina was impregnated into a solution of H12N4PtCl2·XH2O to obtain hydrocracking catalysts.The relationship between acidic properties of supports and catalytic performance was studied by hydrocracking of Fischer-Tropsch (F-T) wax to diesel in a continuous-flow type fixed-bed reactor as a model reaction.The results illustrated that the diesel selectivity was mainly related to Br(o)nsted acid properties of the supports while Lewis acid showed little correlation.The amount of strong Br(o)nsted acid was reversely related to the selectivity of diesel: the smaller the amount,the higher the selectivity.The as-synthesized Pt/B-1 catalyst showed high selectivity of 87.12% to diesel at the conversion of F-T wax of about 62.52%,under the reaction conditions of 370℃,7.0MPa,LHSV of 1.0h-1 and a hydrogen-to-wax ratio of 1000:1.Pt/B-1 had better catalytic performance than Pt/ASA prepared by commercial amorphous silica-alumina (ASA).关键词
加氢裂化/无定形硅铝/费托蜡/柴油/选择性Key words
hydrocracking/amorphous silica-alumina/Fischer-Tropsch wax/diesel/selectivity分类
化学化工引用本文复制引用
李涛,车晓莉,云一峰,陶智超,赵春利,杨勇,李永旺..无定形硅铝载体的酸性对费托蜡加氢裂化反应中柴油选择性的影响[J].燃料化学学报,2017,45(5):589-595,7.基金项目
The project was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA07060200).中国科学院战略性先导专项(XDA07060200)资助 （XDA07060200）
