CAJ | 학술논문

分别以碳纳米管(CNTs),γ-Al_2O_3,SiO_2,TiO_2为载体,Ni、B为活性组分,采用浸渍-化学还原法制备了一系列负载型Ni-B非晶态合金催化剂,并将其用于三种氯代硝基苯液相加氢反应.采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了催化剂的非晶性质、Ni的担载量及催化剂的热稳定性.结果表明,负载型Ni-B非晶态合金催化剂在氯代硝基苯液相加氢反应中表现出较高的活性和良好的选择性,其中以CNTs为载体的非晶态合金Ni-B催化剂可使三种氯代硝基苯的转化率均达到了99.9%,加氢脱氯率小于2.5%.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.
분별이탄납미관(CNTs),γ-Al_2O_3,SiO_2,TiO_2위재체,Ni、B위활성조분,채용침지-화학환원법제비료일계렬부재형Ni-B비정태합금최화제,병장기용우삼충록대초기분액상가경반응.채용전감우합등리자체광보、X-사선연사、투사전자현미경、차시소묘량열등수단연구료최화제적비정성질、Ni적담재량급최화제적열은정성.결과표명,부재형Ni-B비정태합금최화제재록대초기분액상가경반응중표현출교고적활성화량호적선택성,기중이CNTs위재체적비정태합금Ni-B최화제가사삼충록대초기분적전화솔균체도료99.9%,가경탈록솔소우2.5%.토론료CNTs화Ni-B비정태합금지간적상호작용여최화제적최화성능적관계.
The selective hydrogenation of chloronitrobenzene in liquid-phase with Ni-B amorophous alloy catalysts supported on CNTs,γ-Al_2O_3,and AC carriers prepared by impregnation-chemical reduction method was studied.The amount of support of the as-prepared Ni-B/CNTs catalyst was analyzed by ICP.The 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 Ni-B amorophous alloy catalyst supported on CNTs showed the best catalytic performance among all the Ni-B and other Ni-based hydrogenation catalysts,which could be attributed to the unique structure of CNTs and the nature of the amorphous alloy on the surface of CNTs.The relationship between the interaction of CNTs and the ariaorophous alloy and the catalytic performance of the catalyst was discussed.The conversion of the three selected chloronitrobenzene all reached 99.9%and the dechlorination was less than 2.5%.