【摘要】 以介孔分子筛SBA-15为载体,磷酸氢二铵为磷源,硝酸镍为镍源,硼酸为硼源,采用共浸渍法制备了B-Ni₂P/SBA-15催化剂前驱体,然后采用程序升温氢气还原法,制备了n_p/n_Ni=0.8,B含量为0.35%-2.10%（w）的一系列B-Ni₂P/SBA-15催化剂.用X射线衍射（XRD）、N₂吸附脱附、透射电子显微镜（TEM）和氨气程序升湿脱附（NH₃-TPD）等表征技术对催化剂的结构进行了研究,以1%（w）二苯并噻吩（DBT）/十氢萘溶液为模型化合物,在微型同定床反应器上对催化剂的加氢脱硫（HDS）性能进行了评价.结果表明,B-Ni₂P/SBA-15催化剂仍具有介孔结构,Ni₂P为主要的活性物相.适量B助剂的加入可促使Ni₂P晶粒减小,催化剂比表面积增加.此外,随着B含量的增加,B-Ni₂P/SBA-15催化剂的总酸量也增加.当反应压力为3.0 MPa,反应温度由300℃升主至360℃时,B含量对Ni₂P/SBA-15催化剂活性有明显的影响,B含量为1.40%（W）的B-Ni₂P/SBA-15催化剂加氢脱硫活性最高.B-Ni₂P/SBA-15催化剂上二笨并噻吩的加氢脱硫的反应机理以直接脱硫为主.更多还原

【Abstract】 The catalyst precursors of B-Ni₂P/SBA-15 were synthesized by co-impregnation using （NH₄）₂HPO₄ as the source of phosphorus,Ni（NO）₃ as the source of nickel and H₃BO₃ as the source of boron.The B-Ni₂P/SBA-15 catalysts with an initial P/Ni molar ratio of 0.8 and a boron content from 0.35%to 2.10%（w） were prepared by temperature-programmed reduction in a H₂ flow.The structure of the catalysts was characterized by X-ray diffraction（XRD）,N₂ adsorption-desorption,transmission electron microscopy （TEM） and NH₃ temperature-programmed desorption（NH₃-TPD）.The catalytic performances of hydrodesulfurization（HDS） were evaluated in a fixed-bed microreactor using dibenzothiophene（DBT） as a model compound.The results showed that the B-Ni₂P/SBA-15 catalysts still retained mesoporous structure.The Ni₂P phase was mainly active phases in all the catalysts.The proper addition of boron reduced the Ni₂P active phases but increased the specific surface area of the catalysts.The amount of acid in B-Ni₂P/SBA-15 also increased with addition of boron.When the reaction temperature was increased from 300 to 360℃,the HDS conversion of DBT over the catalyst clearly improved with an increase in the content of boron.The B-Ni₂P/SBA-15 catalyst with a boron content of 1.40%（w） had the best catalytic activity.The mechanism of the HDS of DBT consisted of main direct desulfurization（DDS） over the B-Ni₂P/ SBA-15 catalysts.更多还原