氢等离子体法还原Ni(H_2PO_2)_2制备高活性Ni_2P加氢脱硫催化剂  

Preparation of highly active Ni_2P hydrodesulfurization catalysts by reduction of Ni( H_2PO_2)_2with hydrogen plasma

作　　者：王伟[1,2] 王安杰[1,3] 李翔[1,3] 崔艳宏[2] 亓伟[2] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116012 [2]银川能源学院,宁夏银川750105 [3]辽宁省省级高校石油化工技术与装备重点实验室,辽宁大连116012

出　　处：《现代化工》2016年第10期80-82,共3页Modern Chemical Industry

基　　金：国家自然科学基金(20773020;20973030;21073022;21173033);宁夏自然科学基金(NZ15284);宁夏高校优秀青年培育基金资助项目(NGY2015209)

摘　　要：以次磷酸钠和氯化镍为原料,采用氢等离子体还原法(PR)制备了高活性加氢脱硫(HDS)Ni_2P-PR催化剂,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,考察了催化剂的加氢脱硫反应性能,并用X射线衍射(XRD)对催化剂晶相进行表征。新制备的催化剂在移入固定床反应器之前用10%H2S/Ar钝化,以保护其结构不被破坏。实验证明,PR还原法制备的Ni_2P-PR催化剂的加氢脱硫活性高于程序升温还原(TPR)法制备的Ni_2P-TPR催化剂。XRD表征结果表明,Ni_2P-PR的粒度较小,活性中心较多,导致其高活性增加。在Ni_2P-PR催化剂上,DBT主要通过直接脱硫(DDS)路径脱硫。Ni_2P-PR highly active hydrodesulfurization（ HDS） catalyst is prepared by the hydrogen plasma reduction method（ PR）,in which the precursors containing Ni Cl_2 and Na H_2PO_2 are directly converted to the active phosphide phase. The HDS performances of the prepared catalysts are studied using a model fuel containing 0. 8 wt. % of dibenzothiophene in decalin. The morphologies of the catalysts are characterized by XRD. A mixture of 10% H_2 S in Ar is used to passivate the freshly synthesized Ni_2 P to protect their crystal structures before entering fixed bed reactor.Experimental results show that catalytic performances of Ni_2P-PR prepared by the hydrogen plasma reduction（ PR）method are higher for hydrodesulfurization than that of Ni_2P-TPR. XRD characterization results reveal that smaller particle size and more active centers of Ni_2P-PR catalyst is contributed to its improved catalytic performance. Over the Ni_2P-PR catalyst,DBT is mainly removed though DDS desulfurization.

关 键 词：氢等离子体 Ni(H_2PO_2)_2 Ni_2P 二苯并噻吩 加氢脱硫 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]