一步法制备含W介孔碳材料及其氧化脱硫性能研究

发布时间：2018-04-21 17:20

本文选题：WO·HO + 催化氧化脱硫　；参考：《燃料化学学报》2017年03期

【摘要】：以钨酸钠为钨源,以乙二胺四乙酸二钠为碳源经过高温煅烧制备了含W的介孔碳材料,采用XRD、SEM、FT-IR、BET对含钨的介孔碳材料进行表征。结果表明,煅烧后介孔碳材料的表面形成了粒状含有结晶水的氧化钨(WO_3·H_2O)。相比于纯的介孔碳材料,含钨介孔碳材料的总比表面积减小。以含W介孔碳材料为催化剂,H_2O_2作为氧化剂,1-丁基-3-甲基咪唑氟硼酸盐([BMIM][BF_4])离子液体作为萃取剂,组成萃取-催化氧化脱硫体系(ECODS)并研究其对模拟油中二苯并噻吩脱除效果。考察了氧化钨负载量、反应温度、H_2O_2加入量、催化剂用量、离子液体用量以及不同类型硫化物对二苯并噻吩脱除的影响。在最佳反应条件下,催化剂对二苯并噻吩(DBT)、4,6-二甲基二苯并噻吩(4,6-DMDBT)、苯并噻吩(BT)、噻吩(TH)和真实汽油的脱除率分别达到98.6%、65.6%、61.2%、57.8%和64.3%。催化剂回收利用五次之后脱硫率略有降低,仍高达95.2%。
[Abstract]:W containing mesoporous carbon materials were prepared by calcination with sodium tungstate as tungsten source and ethylenediamine tetraacetic acid disodium as carbon source. The results show that the surface of the calcined mesoporous carbon materials is characterized by the formation of WO _ 3H _ 2O _ 2 containing crystalline water on the surface of the calcined mesoporous carbon materials. Compared with pure mesoporous carbon materials, the total surface area of tungsten containing mesoporous carbon materials decreases. Using W mesoporous carbon material as catalyst, S / H _ 2O _ 2 as oxidant and [BMIM] [BF_4] ionic liquid as extractant, the extraction-catalytic oxidation desulfurization system (EcoDSs) was formed and its removal effect of dibenzothiophene from simulated oil was studied. The effects of W _ 2O _ 3 loading, reaction temperature, H _ 2O _ 2 addition, catalyst dosage, ionic liquid and sulfides on the removal of dibenzothiophene were investigated. Under the optimum reaction conditions, the removal rates of the catalyst for dibenzothiophene dibenzothiophene dibenzothiophene 4-dimethyldibenzothiophene 46-DMDBT, benzothiophene butadiene (BTN), thiophene thiophene (THH) and real gasoline reached 98.66.65.60.61.2% and 64.3%, respectively. The desulphurization rate of the catalyst decreased slightly after five times of recovery and was still as high as 95.2%.
【作者单位】：辽宁石油化工大学化学化工与环境学部石油化工学院;辽宁石油化工大学化学化工与环境学部化学与材料科学学院;
【分类号】：TE624.55;TB383.4

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