负载Ni-B非晶态合金催化剂在氯代硝基苯加氢反应中的催化性能研究  

A study on the hydrogenation properties of chloronitrobenzene over supported Ni-B amorphous alloy catalyst

作　　者：杨师棣[1] 汤发有[2] 王香爱[1] 张洪利[1] 

机构地区：[1]渭南师范学院化工化学系,陕西渭南714000 [2]陕西师范大学化学与材料科学学院,陕西西安710062

出　　处：《西北大学学报（自然科学版）》2010年第2期261-264,共4页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省自然科学基金资助项目(2007B23)

摘　　要：目的制备氯和研究了氯代硝基苯液相加氢选择性催化剂。方法分别以纳米碳管(CNTs),γ-Al2O3为载体,Ni-B为活性组分,用浸渍-化学还原法制备CNTs负载非晶态合金Ni-B/CNTs催化剂和Ni-B/γ-Al2O3催化剂,用电感耦合等离子体光谱、X-射线衍射、透射电子显微镜、差示扫描量热等手段研究催化剂的非晶性质、Ni的担载量及催化剂的热稳定性,并讨论了CNTs和Ni-B非晶态合金之间的相互作用与催化剂的催化性能的关系。结果与其他催化剂相比,3种氯代硝基苯的转化率均高于99.8%,脱氯率小于3%。结论该催化剂具有较好加氢性能和较高的抑制脱氯性能,优于其他催化剂。Aim To synthesize and study the selective hydrogenatin of chloronitrobenzen in the liqud-phase.Methods With Ni-B amorophous alloy alloy acting as the active ingredient,catalysts supported on CNTs/γ-Al2O3 carrier was prepared by the impregnation-chemical reduction.The amount of support of the as-prepared Ni-B/CNTs catalyst was analyzed by ICP.Its amorphous alloy structure of the Ni-B/CNTs catalyst was confirmed by XRD.TEM was used to determine its particle size,and the thermal stability of the Ni-B/CNTs catalyst was studied by DSC.The relationship between the interaction of CNTs and amorphous metals and the catalytic performance of the catalyst was also discussed.Results In contrast to other catalyst,the conversion of the three selected chloronitrobenzen all reached 99.9% and the dechlorination was less than 3%.Conclusion It was shown that the catalyst had higher catalytic performance than Ni-B and other Ni-based hydrogenation catalysts.It could be attributed to the unique structure of CNT s and the nature of amorphous metals on the surface of CNTs.

关 键 词：碳纳米管 镍 硼 非晶态合金 催化加氢 氯代硝基苯 

分 类 号：O643[理学—物理化学]