Ni含量对镍催化剂芳烃加氢抗硫性能的影响  

Effect of nickel content on sulfur tolerance of nickel-based catalysts for aromatic hydrogenation

作　　者：黄华[1] 尹笃林[2] 文建军 张茂昆[1] 徐斌[1] 

机构地区：[1]中国石化长岭分公司研究院,湖南岳阳414012 [2]湖南师范大学精细催化合成研究所,湖南长沙410081 [3]湖南建长石化股份有限公司,湖南岳阳414012

出　　处：《工业催化》2005年第1期13-16,共4页Industrial Catalysis

摘　　要：采用浸渍法制备了一系列不同Ni含量的负载型Ni/Al2O3催化剂。以甲苯为探针分子,噻吩为毒物,在1 0MPa、200℃、空速2 0h-1的反应条件下,用固定床连续流动微反装置进行了催化剂的抗硫性评价,并运用XRD、TPR、DSC和BET等手段研究了催化剂的物化性能和结构特征。结果表明,当Ni质量分数低于6 0%时,Ni几乎与γ Al2O3形成NiAl2O4尖晶石结构,失去芳烃加氢活性和抗硫性能;Ni含量高有利于提高催化剂的还原度,从而提高了催化剂的抗硫性。Ni/Al_2O_3 catalysts with different nickel content were prepared by impregnation method. Tolerance of the nickel-based catalysts to sulfur poisoning was investigated via hydrogenation of toluene containing thiophene in a fixed-bed continuous-flow microreactor at 1.0　MPa, 200 ℃ and LHSV (2.0 h^(-1)). Physicochemical properties and structure of the catalysts were examined by XRD, TPR,DSC and BET. The results showed that the catalysts with high nickel content exhibited very high aromatic hydrogenation activity and tolerance to sulfur, while catalysts with low nickel content (less than 6.0%) was likely to form NiAl_2O_4 of no aromatic hydrogenation activity.

关 键 词：镍含量 金属催化剂 芳烃加氢 抗硫 

分 类 号：TE624.431[石油与天然气工程—油气加工工程]