摘要
以介孔氧化钛晶须成型材料为载体,通过浸渍法制备不同MoO3负载量的MoO3/TiO2加氢脱硫催化剂.XRD分析表明,介孔氧化钛晶须成型载体为纯锐钛矿相,MoO3负载量为7.2%(ω)的催化剂未出现MoO3的衍射峰;BET分析显示,负载7.2%(ω)MoO3后,氧化钛晶须成型载体的比表面积和孔容能保持原来的80%以上.活性评价结果表明,未经预硫化的MoO3/TiO2催化剂直接应用于二苯并噻吩(DBT)加氢脱硫反应时,在温度280～300℃、氢分压2.0MPa、体积空速4h-1、H2/油体积比600的条件下,DBT转化率达100%.将模型溶液中硫含量由400×10-6g/g降至10×10-6g/g以下,催化剂表现出较高的活性,且在一定条件下运行1000h未出现失活迹象.
Mesoporous titania whiskers were used as MoO3 hydrodesulfurization catalyst support. The novel support was impregnated with ammonium heptamolybdate [（NH4）6Mo7O24·4H2O] solution at different concentrations, and MoO3/TiO2 catalyst with different MoO3 loadings was obtained. The catalyst was characterized by XRD, N2 adsorption-desorption and SEM, the one with higher dispersion of MoO3 was chosen for dibenzothiophene hydrodesulfurization. And the influences of reaction conditions and stability of MoO3/TiO2 catalyst on dibenzothiophene hydrodesulfurization of the chosen catalyst were tested in a fixed-bed reactor. Dibenzothiophene conversion rate could approach 100% under reaction temperature 280-300℃, hydrogen pressure 2.0 MPa, hydrogen/oil ratio 600 and LHSV 4 h^-1. Furthermore, there was no obvious evidence of deactivation of the catalyst after running for a long time of over 1000 h.
出处
《过程工程学报》
CAS
CSCD
北大核心
2009年第5期882-886,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金重点资助项目(编号:20736002)
国家高技术研究发展计划(863)基金资助项目(编号:2006AA03Z455)
国家自然科学基金委员会与香港研究资助局联合科研基金资助项目(编号:20731160614)
江苏省科技计划基金资助项目(编号:BG2007051)
江苏省教育厅科学基金资助项目(编号:08KJB530003)
关键词
介孔氧化钛晶须
氧化钼
二苯并噻吩
加氢脱硫
mesoporous titania whisker
molybdenum oxide
dibenzothiophene
hydrodesulfurization
