以氯化镍(硝酸镍)和次磷酸铵(磷酸氢二铵)(Ni∶P摩尔比为1)为原料,氢等离子体还原法(PR)制备高活性加氢脱硫Ni2P催化剂,新制备的催化剂在移入固定床反应器之前用质量分数10％ H2S/Ar钝化,以保护其结构不被破坏.以质量分数为0.8％的二苯并噻吩(DBT)/十氢萘溶液为模型化合物,考察了不同磷原催化剂的加氢脱硫(HDS)性能.X射线衍射(XRD)对制备的催化剂晶相进行了表征.实验证明,低价态P源制备的Ni2P催化剂(N2P-1-PR)的加氢脱硫(HDS)活性高于高价态P源制备的Ni2P催化剂(N2 P-2-PR).XRD表征结果表明,N2P-1-PR粒度较小,导致其高活性增加.在Ni2P催化剂上,DBT主要通过直接脱硫路径(DDS).%Ni2P highly active hydrodesulfurization (HDS)catalyst was prepared by the hydrogen plasma reduction (PR),in which the precursors containing NiCl2 [Ni(NO3)] and NH4H2PO2 [(NH4) 2HPO4] (Ni∶ P mole ratio of 1) were directly converted to the active phosphide phase.A mixture of 10％ H2S in Ar was used to passivate the freshly synthesized Ni2P to protect their crystal structures before entering fixed bed reactor.The HDS performances of different phosphorus source catalysts were studied using a model fuel containing mass fraction 0.8％ dibenzothiophene in decalin,and the morphologies of the catalysts were characterized by X-ray diffraction (XRD).The catalytic activity was compared Ni2 P with phosphate as raw materials by the hydrogen plasma reduction.The results show that hydrodesulfurization (HDS) activity of the Ni2P catalyst(N2P-1-PR) prepared with low state P source is higher than the Ni2P catalyst(N2P-2-PR) prepared with high state P source.The XRD characterization results reveal that particle size of N2P-1-PR is less than N2P-2-PR,which increases its highly active.The DBT was mainly through the path of DDS desuffurization over the Ni2P catalyst.
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