Ni2P／SiO2催化剂的制备及加氢脱硫性能  

PREPARATION OF Ni_2P/SiO_2 CATALYST AND ITS HYDRODESULFURIZATION PERFORMANCE

作　　者：刘理华[1] 李广慈[1] 柳云骐[1] 刘晨光[1] 

机构地区：[1]中国石油大学重质油国家重点实验室,CNPC催化重点实验室,青岛266555

出　　处：《石油炼制与化工》2011年第1期64-68,共5页Petroleum Processing and Petrochemicals

基　　金：国家重点基础研究发展计划“973”项目(2010CB226905)资助

摘　　要：以次磷酸镍为原料在氮气气氛中进行低温固相反应,制备Ni_2P/SiO_2催化剂。用X射线衍射(XRD)、N_2吸附脱附和透射电子显微镜(TEM)等分析测试技术对催化剂结构进行表征,Ni_2P/SiO_2(负载质量分数为20%)催化剂的比表面积是为226.2 m^2/g,其活性组分在二氧化硅载体上具有良好的分散性,颗粒大小为5～8 nm。以二苯并噻吩为模型化合物,在微型固定床反应器上对该催化剂的加氢脱硫性能进行评价,在反应温度为340℃、氢气压力为2.0 MPa、空速为2.0 h、氢油体积比为300:1时,二苯并噻吩的转化率为99.1%,其直接脱硫与加氢脱硫的选择性之比为4.5。结果表明,Ni_2P/SiO_2催化剂具有较高的加氢脱硫活性和选择性。Silica-supported Ni2P catalysts were prepared by the solid phase reaction of nickel hypophosphite under N2 atmosphere and low temperature. X-ray diffraction （XRD）, N2 adsorption-desorption isotherms, and transmission electron microscopy （TEM） were used to analyze and obtain the structure parameters of the prepared catalysts. The specific surface area of a Ni2P/SiO2 catalyst having 20 Ni2P was 226.2 m^2/g;the active components, Ni2P, were well dispersed on the SiO2 support with a particle size of 5-8 nm as shown by TEM analysis. The catalytic performance of this catalyst was evaluated in a fixed-bed reactor for hydrodesulfurization using a model feed containing 2 % dibenzothiophene （DBT）. Under the conditions of a reaction temperature of 340 ℃, a hydrogen partial pressure of 2.0 MPa, a LHSV of 2. 0 h^-1 and a H2/oil volume ratio of 300, the conversion of DBT reached 99. 1%. Furthermore, the desulfurization reactions had a strong tendency of following direct desulfurization pathway.

关 键 词：磷化镍 固相反应 二苯并噻吩 加氢脱硫 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]