以稻壳为原料的介孔MoO3/SiO2制备及其氧化脱硫性能
Study on the Green Preparation of Mesoporous MoO3/SiO2 by rice husk and Its Catalytic Performance in Oxidative Desulfurization
胡健 1邓颖 1向晓蓉 1李琴琴 1程慧清 2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 434023
- 折叠
摘要
以稻壳为硅源和介孔模板,四水合钼酸铵为钼源,通过等体积浸渍法制备了一系列不同MoO3 负载量的介孔MoO3/SiO2.通过XRD、UV-Vis、FT-IR和N2 吸附-脱附等温线的技术手段对样品进行了表征.结果表明,低负载量的样品,MoO3 在载体SiO2 上分散较好;高负载量的样品开始出现正交晶系的 MoO3 晶体.样品具有较大的比表面积和明显的介孔结构.采用二苯并噻吩(DBT)和 4,6-二甲基二苯并噻吩(4,6-DMD-BT)模拟油的氧化脱硫反应,评价了样品的催化性能,筛选出合适的催化剂为10％ MoO3/SiO2.在优化的反应条件下,DBT和4,6-DMDBT的转化率均为99.9％.
Abstract
A series of mesoporous MoO3/SiO2 catalysts with different MoO3 loadings were prepared by an incipient-wetness impregnation meth-od using rice husk as both silica source and mesoporous template,and ammonium molybdate tetrahydrate as molybdenum source.The samples were characterized by XRD,UV-Vis,FT-IR and N2 adsorption-desorption isotherms techniques.The results showed that MoO3 is well dis-persed on the carrier SiO2 for samples with low MoO3 loadings;MoO3 crystals with orthorhombic phase begin to appear for samples with high MoO3 loadings.The samples had large specific surface area and obvious mesoporous structure.The catalytic performance of the samples was eval-uated by oxidative desulfurization reactions of dibenzothiophene(DBT)and 4,6-dimethyldibenzothiophene(4,6-DMDBT)model oils,and the suitable catalyst was screened to be 10％ MoO3/SiO2.Under the optimum reaction conditions,the conversions of both DBT and 4,6-DMDBT were 99.9％.
关键词
MoO3/SiO2催化剂/氧化脱硫/稻壳/介孔Key words
MoO3/SiO2 Catalysts/Oxidative Desulfurization/Rice Husk/Mesopore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