摘要
采用ＭｏＯ＿３为活性组分，以ＺｒＯ＿２、ＴｉＯ＿２、ＳｉＯ＿２、γ－Ａｌ＿２Ｏ＿３和ＭｇＯ为载体，对丙烷催化脱氢制丙烯进行了研究，得到了不同载体对反应活性与丙烯选择性的关系。实验发现γ－Ａｌ＿２Ｏ＿３对丙烷反应活性最高，ＭｇＯ对丙稀的选择性最好。采用γ－Ａｌ＿２Ｏ＿３为载体，ＭｇＯ为助催化剂，用竞争吸附法制得了ＭｏＯ＿３－ＭｇＯ／γ－Ａｌ＿２Ｏ＿３复合氧化物催化剂。此催化剂比常用的Ｃｒ＿２Ｏ＿３Ｋ＿２Ｏ／γ－Ａｌ＿２Ｏ＿３脱氢催化剂具有高的低温活性。ＭｏＯ＿３－ＭｇＯ／γ－Ａｌ＿２Ｏ＿３催化剂在５６０℃常压下，丙烯摩尔收率达２６％，能达到工业丙烷脱氢催化剂应满足的要求。
With molybdenum oxide chosen as the active metal oxide,the effects of supports(ZrO_2,TiO_2,SiO_2,γ-Al_2O_3 and MgO)on the conversion of propane and selectivity to propylene have been investigated. The catalyst of better activity and higher selectivity, MoO_3/MgO-γ-Al_2O_3 , was prepared. Particularly,the catalyst gives higher dehydrosenation activity than Cr_2O_3/γ-Al_2O_3 at low temperature.The optimum yield of propylene exceeds 26% (mol) at 560℃.
出处
《分子催化》
EI
CAS
CSCD
1995年第6期411-416,共6页
Journal of Molecular Catalysis(China)
关键词
丙烷
脱氢
氧化物催化剂
催化
催化剂
Propane dehydrogenation,Metal oxide catalysts,Molybdenum oxide,γ-Al_2O_3,MgO
