摘要
以MoO3及沉淀法制得的CoMo氧化物为前驱体 ,在N2 H2 混合气中用程序升温反应制得一系列氮化 (钴 )钼催化剂 ;用二苯并噻吩加氢脱硫为模型反应 ,考察了催化剂的催化性能 .结果表明 :( 1 )二苯并噻吩在氮化钼催化剂上的加氢脱硫有两条反应途径 ,即噻吩环直接氢解加氢脱硫 ;苯环先加氢 ,然后噻吩环氢解脱硫 .( 2 )氮化钼有高的活性和选择C—S键断裂生成联苯的选择性 ,Co的加入明显提高了氮化钼的催化活性 .( 3)不同预处理条件对催化剂的催化性能有不同的影响 ,预还原降低催化活性 ,预硫化与未处理时的活性相当 ,预硫化使催化剂上生成联苯的选择性有所降低 .
Molybdenum nitride ( γ Mo 2N) and cobalt promoted molybdenum nitride (Co Mo N) catalysts with high surface area were prepared from reaction of MoO 3 with N 2 H 2 and characterized by XRD and BET. It was concluded for hydrodesulfurization of dibenzothiophene that γ Mo 2N and Co Mo N had higher HDS activity and selectivity for C S bond breakage of dibenzothiophene; the different pretreatment conditions affected the HDS activity and selectivity; the HDS activity of γ Mo 2N was significantly improved with the addition of Co promoter.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2000年第4期337-340,共4页
基金
中国石油天然气集团公司资助
石油大学基础研究基金资助
关键词
二苯并噻吩
加氢脱硫
氮化钴钼
催化剂
石油加工
dibenzothiophene, hydrodesulfurization, cobalt molybdenum nitride, molybdenum nitride
