A series of B-Ni_2P/SBA-15,cord monolithic catalysts were prepared by coating the slurry of the B-Ni_2P/SBA-15 precursors on a pretreated cordierite support,and followed by temperature-programmed reduction in a H_2flow.The samples were characterized by X-ray diffraction(XRD) and N_2 adsorption-desorption technique.The catalytic activities for the hydrodesulfurization(HDS) of dibenzothiophene(DBT) were evaluated.The results showed that Ni_2P phase was present in all B-Ni_2P/SBA-15/cord monolithic catalysts.The specific surface areas(S_(Bet)) of the B-Ni_2P/SBA-15/cord monolithic catalysts was first increased to 167 m^3·g^(-1),and then decreased to 155 m^2·g^(-1) with the increase of boron contents.The catalytic activity also showed the similar trend with the increase of boron contents.The 1.75%(by mass) B-Ni2P/SBA-15/cord monolithic catalysts exhibited the highest DBT conversion of 98.4%at 380 ℃.The cordierite-based monolithic catalysts showed better low temperature sensitivity for HDS of DBT in comparison with the particle catalysts.Moreover,two HDS routes,direct desulfurization(DDS) and hydrogenation(HYD),proceeded independently over B-Ni2P/SBA-15/cord monolithic catalysts and the main pathway was DDS.
