Preparation of WP/SiO2 hydrodesulfurization catalyst by a non-calcination method
ZHU Duihu1， YU Zhiquan2， WANG Wei1， HUANG Ruimin1， WANG Anjie2
1.Yinchuan Institute of Energy， Institute of Petrochemical Technology， Yinchuan 750105， China；2.Liaoning Key Laboratory of Petrochemical Technology and Equipment， Dalian，Liaoning 116024， China
Abstract：Calcinated and non-calcinated WP/SiO2 precursors were prepared by an incipient impregnation method， followed by H2 temperature-programmed reduction (H2-TPR) method. The morphologies of the catalysts were characterized by XRD and N2 physical adsorption， and the HDS performances were studied with a model fuel containing 0.8% (mass fraction) dibenzothiophene (DBT) in decalin. Compared with the calcinated WP/SiO2 (C-WP/SiO2)， NC-WP/SiO2 possessed larger specific surface area and pore volume. After HDS of DBT， the specific surface area and pore volume of both catalysts decreased. Over NC-WP/SiO2， the conversion of DBT was slightly lower than that over C-WP/SiO2. Over these two catalysts， the conversion of DBT increased with elevated temperature. Besides， as the reaction temperature increased， the selectivity of BP increased， while that of the hydrogenation intermediate decreased. It could be concluded that high temperature enhanced the HDS performance of the catalysts. At 340℃， C-WP/SiO2 (0.33 mol·g－1·min－1) showed higher k than that over NC-WP/SiO2 (0.28 mol·g－1·min－1). Over NC-WP/SiO2， HDS of DBT mainly occurred through DDS pathway. On the other hand， the hydrogenation performance was much higher over C-WP/SiO2.
2017, Vol. 51 
