燃料化学学报2025，Vol.53Issue(11)：1617-1627,11.DOI:10.1016/S1872-5813(25)60567-6
方糖状CSS@n-TS-1分子筛的合成及其催化氧化脱硫性能
Synthesis of cubic sugar-shaped CSS@n-TS-1 zeolites and their catalytic performance in the oxidative desulfurization of oil products
摘要
Abstract
Cubic sugar-shaped silicon-1(CSS)was synthesized by using the seed induction method with ammonium fluoride(NH4F)as the structure directing agent.The surface charge of CSS was then modified using the polymer electrolyte PDDA under alkaline conditions with a pH value of 9.5.After static adsorption in a titanium sol system for 4 h,the PDDA-modified CSS was further crystallized statically with water vapor for 24 h,to obtain the cubic sugar-shaped CSS@n-TS-1 zeolites where a titanium-silicon structure was coated on the surface of the all-silica zeolites.The CSS@n-TS-1 zeolites were characterized by means of SEM,TEM,XRD,FT-IR,UV-vis spectroscopy,XPS and N2 sorption.The results indicate that the CSS@n-TS-1 zeolites display a hierarchical mesoporous structure,with a particle size of about 100 nm;in addition,the content of Ti in the surface phase is over 9.0％.When used in the oxidative desulfurization of a model oil,viz.,n-octane containing 500 mg/L dibenzothiophene(DBT)or 4,6-dimethyldibenzothiophene(4,6-DMDBT),the cubic sugar-shaped CSS@n-TS-1 zeolites with a titanium-rich surface exhibit excellent catalytic performance in the oxidative desulfurization towards large molecular organic sulfur compounds;the conversion of both DBT and 4,6-DMDBT reach 100％within 150 min.关键词
钛硅分子筛/表面富钛/方糖状/氧化脱硫Key words
titanium silicate zeolite/titanium-enriched silicon surface/cubic-sugar shaped/oxidative desulfurization分类
化学工程引用本文复制引用
张玉妹,任铁强,王钰佳,孙悦,耿忠兴,武宏大,刘宇彤,王海彦..方糖状CSS@n-TS-1分子筛的合成及其催化氧化脱硫性能[J].燃料化学学报,2025,53(11):1617-1627,11.基金项目
The project was supported by Liaoning Province Department of Education(JYTMS20231433).辽宁省教育厅基本科研基金(JYTMS20231433)资助 （JYTMS20231433）
