摘要
采用二次纳米自组装方法制备具有框架式结构的纳米氧化铝载体,在该载体上浸渍钼、镍活性金属后制得渣油脱金属催化剂,其孔体积为1.650cm3/g、比表面积为407m2/g、平均孔径为16.2nm。在渣油加氢反应条件下,对制得的催化剂进行脱金属评价试验,结果表明,金属Ca、V可以均匀沉积在该介孔氧化铝载体上,并在载体内部孔道形成棒状粒子沉淀,运转3000h后,共沉积了19.0%的金属,孔体积为0.793cm3/g,孔隙率为80.4%,大于10nm孔道占95.3%,显示了这种载体的孔道结构有利于沥青质胶团的贯穿性扩散。
A nano-alumina with build-up framework pore structure and high penetrating diffusion property was prepared by secondary nano-assembly technique. Said mesoporous alumina support was impregnated with solution containing Ni-Mo active metals to obtain a hydrodemetallization catalyst having a pore volume of 1.65 cm^3/g, a specific surface area of 407 m^2/g and an average pore diameter of 16.2 nm. The demetallization performance of the catalyst was evaluated under residue feed hydrotreating conditions. Results showed that Ca and V could be precipitated evenly on the mesoporous alumina support and some cylindrical metal deposits were formed in the channels. After running 3 000 h, the amount of deposited metals reached 19.0%;the pore volume of the used catalyst was still 0.793 cm^3/g with porosity of 80.4%,in which over 95.3% of the pores were larger than 10 nm, indicating that the pore structure of this mesoporous alumina support was favorable for asphaltene micelles to penetrating diffuse in the build-up passages.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2010年第1期31-35,共5页
Petroleum Processing and Petrochemicals
关键词
纳米自组装
催化剂
氧化铝
渣油
贯穿
扩散
nano-assembly
catalyst
aluminum oxide
residue
penetrating
diffusion
