摘要
在柱撑黏土Ti-PILCs的合成过程中,加入各种表面活性剂进行改性,通过负载Zn制备了Zn/Ti-PILCs吸附剂,考察了其对模拟柴油中二苯并噻吩的选择吸附性能。结果表明,经表面活性剂尤其是十六烷基三甲基溴化铵(CTAB)改性制备的Zn/Ti-PILCs其吸附脱硫率得以显著提高。当CTAB/Ti摩尔比为0.5时,Zn/Ti-PILCs-CATB具有最佳的吸附性能,DBT去除率达96.3%。N2吸附脱附等温线和孔径分布研究表明,CTAB改性可增加1 nm~4 nm孔的数量,并改善黏土层间柱子的分布,使Ti-PILCs具有更高的比表面及更均匀的孔径分布。
Various surfactants were added during the synthesis of pillared clays Ti-PILCs to modify their structure and properties.Zn supported on the surfactant-modified Ti-PILCs(Zn/Ti-PILCs) was used as a desulfurization adsorbent and its performance in desulfurization of a model diesel oil containing dibenzothiophene(DBT) was investigated.The results showed that the capability of Zn/Ti-PILCs for DBT selective adsorption is enhanced by the surfactant modification.Especially,Zn/Ti-PILCs-CTAB obtained through modification with hexadecyl-trimethyl-ammonium bromide(CTAB)(CTAB/Ti molar ratio being 0.5) exhibits high desulfurization performance with a DBT removal rate of 96.3%.The characterization results of nitrogen sorption indicated that the surfactants added during the pillaring process can increase the surface area of the resultant Ti-PILCs and improve their pore distribution by enhancing the amounts of mesopores(1nm~4nm).
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2011年第3期203-206,共4页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(20776031)
广州市属高校科技计划项目(08C076)