存在4,6-DMDBT时喹啉、吲哚和咔唑在Ni-Mo加氢催化剂上加氢脱氮自抑制作用  

SELF-INHIBITION FOR HDN OF QUINOLINE,INDOLE AND CARBAZOLE OVER Ni-Mo CATALYST IN THE PRESENCE OF 4,6-DMDBT

作　　者：韩姝娜[1] 周同娜[1] 柴永明[1] 刘晨光[1] 单永为 

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,山东青岛266555 [2]中国石油大港石油化工公司,天津300280

出　　处：《石油学报（石油加工）》2010年第3期351-356,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：教育部创新团队“重质油高效转化的绿色化学与工程”项目资助

摘　　要：在S质量分数(w(S))为849μg/g的4,6-DMDBT甲苯溶液中,分别添加不同量的喹啉、吲哚和咔唑,采用Ni-Mo加氢催化剂,在温度280℃、总压力2MPa、V(H2)/V(Oil)为300、液时空速5h-1的条件下进行加氢实验,考察4,6-DMDBT存在时喹啉、吲哚和咔唑在Ni-Mo加氢催化剂上加氢脱氮自抑制作用。结果表明,添加喹啉当N质量分数达到455μg/g时没有出现加氢脱氮自抑制现象,脱氮率在3种氮化物中最低。喹啉的部分加氢产物四氢喹啉是产生自抑制的主要物质。添加吲哚和咔唑在实验的N质量分数范围内均出现加氢脱氮自抑制现象,其部分加氢产物二氢吲哚、吲哚氮烷基取代产物N-乙基-吲哚、四氢咔唑是产生自抑制的主要物质。咔唑的加氢脱氮自抑制作用比吲哚低。The hydrodenitrogenation （HDN） experiments of quinoline,indole and carbazole,respectively,in the 4,6-DMDBT toluene solution with w（S） of 849 μg/g were carried out under the conditions of 280℃,total pressure 2 MPa,V（H2）/V（Oil）=300 and the liquid hourly space velocity 5 h-1,to investigate self-inhibition for HDN of the three nitrogen-containing compounds over Ni-Mo catalyst in the presence of 4,6-DMDBT.According to the rate of HDN,the pathways of reaction and the change of products,quinoline had no self-inhibition effect for HDN,even the N mass fraction was 455 μg/g in the presence of 4,6-DMDBT.The conversion of quinoline was 97% and the rate of HDN was 10%,which was the lowest in the three-containing compounds.The product of part hydrogenation of quinoline,tetrahydroquionline,had self-inhibition effect for HDN.In the range of N mass fraction used in this experiment,indole and carbazole both had self-inhibition effect for HDN,which was mainly from their part hydrogenation products,indoline and tetrahydrocarbazole,also the product of N alkyl substitution of indole,N-ethyl-indole.The self-inhibition effect for HDN of carbazole was lower than that of indole.

关 键 词：Ni-Mo催化剂 4 6-DMDBT 喹啉 吲哚 咔唑 加氢脱氮(HDN) 自抑制 

分 类 号：O643[理学—物理化学]