介孔WO3/SiO2的制备及其氧化脱硫性能
Preparation of Mesoporous WO3/SiO2 and Its Catalytic Property in Oxidative Desulfurization
张敬唯 1赵茹玉 1何苗 1王阳 1张银海 1刘晓雪 2李颢1
作者信息
- 1. 长江大学 化学与环境工程学院,湖北 荆州 434023
- 2. 长江大学 农学院,湖北 荆州 434000
- 折叠
摘要
以稻壳为硅源和介孔模板,磷钨酸为钨源,采用等体积浸渍法制备了一系列不同 WO3 负载量的介孔WO3/SiO2 催化剂.结果表明,低负载量的样品,WO3 晶粒在载体SiO2 上高度分散,且样品的比表面积、外表面积和介孔体积均较高.采用二苯并噻吩(DBT)和4,6-二甲基二苯并噻吩(4,6-DMDBT)模拟油的氧化脱硫反应,评价了样品的催化性能.在优化的条件下,2.4%WO3/SiO2 样品给出了 99.9%的 DBT 转化率和99.5%的4,6-DMDBT转化率.
Abstract
A series of mesoporous WO3/SiO2 catalysts with different WO3 loadings were prepared by an incipient-wetness impregnation method using agricultural waste rice husk as both silica source and mesoporous template,and phosphotungstic acid as tungsten source.The relevant char-acterization results showed that for the samples with low loading,the WO3 grains were highly dispersed on the carrier SiO2,and the samples had higher specific surface area,external surface area and mesopore volume.The catalytic performance of the samples was evaluated by oxidative des-ulfurization reactions of dibenzothiophene(DBT)and 4,6-dimethyldibenzothiophene(4,6-DMDBT).The 2.4%WO3/SiO2 sample gave 99.9%DBT conversion and 99.5%4,6-DMDBT conversion under optimized conditions.
关键词
稻壳/介孔/WO3/SiO2催化剂/氧化脱硫Key words
Rice Husk/Mesopore/WO3/SiO2 Catalysts/Oxidative Desulfurization引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据