摘要
以钙型蒙脱土为原料,以ZrOCl2·8H2O和Ce(NO3)3为交联改性液的前驱体,制备了锆交联粘土和铈改性锆交联粘土,采用吸附法同步脱除汽油中的含硫和含氮物质,从而得到低硫、低氮清洁汽油.采用XRD和BET孔结构分析、SEM等方法对制备的多孔柱撑粘土结构进行了表征,并提出了粘土交联改性过程中结构变化的模型.结果表明,交联后粘土层间距d001值可达2.38nm,比原土的1.54nm有显著增大,比表面积和孔容明显增大,对汽油中含氮、含硫化合物的同步脱除率分别达72.8%和58.7%.
Zr and Zr-Ce pillared clays were prepared using Ca-montmorillonite （Ca-MMT） as clay material by different methods. The intercalation solutions were prepared using ZrOCl28H2O and Ce（NO3）3 as precusors. Synchronous adsorptive desulfurization and denitrification of gasoline were investigated with the modified clays. The results show that clean gasoline with low sulfur and nitrogen could be produced. The intercalated clay was characterized by XRD, N2 adsorption-desorption and SEM analysis. And the structural model was proposed in pillared intercalation process. The XRD result shows that d001 of the modified clay is 2.38 nm, which is much larger than Ca-MMT of 1.54 nm. The specific surface area and specific pore volume of the pillared clays also increase obviously. The results show that the efficiencies of denitrification and desulfurization of the gasoline by the modified montmorillonite are 72.8% and 58.7% respectively.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2008年第3期484-488,共5页
The Chinese Journal of Process Engineering
基金
国家重点基础研究发展规划(973)基金资助项目(编号:2004CB719501)
中国石油天然气股份有限公司科技风险创新基金资助项目(编号:050511-3-2)
关键词
锆交联粘土
锆铈交联粘土
同步脱硫脱氮
汽油
Zr-PILC
Zr-Ce-PILC
synchronous desulfurization and denitrification
gasoline
