摘要
在常压固定床流动体系中研究了 Ni-Mo Ox 催化剂对正庚烷异构化反应的催化性能 .将质量分数为2 %～ 5 %的 Ni掺杂于 Mo O3 中可有效地缩短催化剂的还原活化时间 ,并较大幅度地提高催化剂的比活性 .Ni-Mo Ox 催化剂上的正庚烷异构化的反应活化能为 35 .3k J/mol,显著低于 Mo Ox 催化剂上的活化能(4 9.3k J/mol) ,仅为双功能分子筛催化剂的 1 /3～ 1 /4 .
The Ni doped molybdenum oxide(Ni-MoO x) as the catalyst for n-heptane isomerization has been studied in a conventional fixed bed reactor. It is indicated that addition of mass fractions 2%-5% Ni to MoO 3 can markedly shorten the reduction period of H 2 which is necessary for the formation of active phase Ni-MoO x catalyzing n-heptane isomerization. The relative activity for n-heptane isomerization in terms of unit surface area of the catalyst can be enhanced greatly by addition of Ni as well. On the Ni-MoO x catalyst, the apparent activation energy for n-heptane isomerization is ca. 35.3 kJ/mol, which is obviously lower than 49.3 kJ/mol obtained on MoO x. And it is 1/3-1/4 as low as those of zeolite-based bifunctional catalyst for the n-heptane isomerization.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第7期1281-1284,共4页
Chemical Journal of Chinese Universities
基金
中国石化总公司基金 (批准号 :X5 0 0 0 0 2 )资助
