氧化铝载体孔结构对长链正构烷烃(C_(16)～C_(19))脱氢Pt-Sn-K/Al_2O_3催化剂性能的影响  

Effects of pore structure of alumina supports on the performance of Pt-Sn-K/Al_2O_3 catalysts for long chain n-paraffin (C_(16)-C_(19)) dehydrogenation

作　　者：李悦[1,2] 罗沙[3] 陈东[1] 曹凤英[1] 许普[1] 何松波 

机构地区：[1]中国石油抚顺石化公司研究院表面活性剂研究所,辽宁抚顺113001 [2]南京大学研究生院,江苏南京210008 [3]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040 [4]大连和诚催化技术有限公司,辽宁大连116085

出　　处：《工业催化》2016年第12期46-49,共4页Industrial Catalysis

摘　　要：通过N2吸附-脱附法对4种Al2O3载体进行孔结构表征,采用等体积真空浸渍法制备Pt质量分数0.5%的Pt-Sn-K/Al2O3催化剂,以直链烷烃C16-C19脱氢反应为探针,考察Al2O3载体孔结构对催化剂脱氢性能的影响。结果表明,催化剂载体的孔容、平均孔径和比表面积之间存在相互制约的关系。载体孔容和平均孔径大,则其比表面积相对较小。对于直链烷烃C16-C19脱氢催化剂,较大孔容、孔径和一定比表面积的Al2O3载体为最佳,孔容和孔径较小的催化剂脱氢活性和稳定性较差。The pore structure of alumina supports were characterized by nitrogen adsorption-desorption method. Pt-Sn-K/Al2O3 catalysts with Pt mass fraction of 0. 5% were prepared by using vacuum impregnation method. The influence of the pore structure of Al2O3 supports on the catalytic performance of the catalysts was investigated by using long chain n-paraffin C16-C19 dehydrogenation as the probe reaction.The results showed that the pore volume,average pore size and specific surface area of the supports had the mutual restriction. When the pore volume and size of the support were large,its surface area was relatively small. Al2O3 supports with larger pore volume and pore size,and a certain surface area were suitable for the catalysts for long chain n-paraffin C16-C19 dehydrogenation. The catalysts with smaller pore volume and pore size possessed the relatively low dehydrogenation activity and stability.

关 键 词：催化剂工程 氧化铝载体 长链正构烷烃 孔结构 Pt-Sn-K/Al2O3催化剂 

分 类 号：TQ426.6[化学工程] TQ314.242