摘要
在100℃下,将草酸与氯化胆碱按照等物质的量混合搅拌制备氯化胆碱/草酸低共熔溶剂(Ch Cl/H_2C_2O_4)。采用红外光谱(IR),热重(TGA)和氢谱(1HNMR)对其结构分别进行了相关表征分析。以Ch Cl/H_2C_2O_4低共熔溶剂作为萃取剂和催化剂,过氧化氢为氧化剂氧化脱除模拟油中的二苯并噻吩。分别考察了反应温度、过氧化氢用量以及不同含硫化合物对脱硫率的影响。实验表明最优反应条件为5 m L模拟油,1 m L的Ch Cl/H_2C_2O_4低共熔溶剂,0.3 m L的过氧化氢,反应温度为40℃,在160 min的最佳反应条件下DBT的脱除率高达93.4%。结果表明其表观活化能较低。在5次循环反应以后,其脱硫效果略有降低,表明该低共熔溶剂的催化脱硫活性和稳定性较高。
ChCl/H2C2O4 deep eutectic solvents （DESs） were formed by stirring the oxalic acid （H2 C2O4 ） and choline chloride （ChCl） in accordance with the same molar amount under 100℃. The structure of them were characterized by infrared analysis （IR）, thermogravimetrie analysis （TGA） and hydrogen spectrum analysis （1HNMR）. Dibenzothiophene（DBT） in model oil was removed by using ChC]/H2C2O4 DESs as extraetant and catalyst and hydrogen peroxide （H202 ） as oxidant. The effects of reaction temperature, dosage of hydrogen peroxide and different sulfur compounds were investigated. The optimal reaction condition is 5 mL of model oil, 1 mL of ChC1/H2C2O4 DESs, 0.3 mL of H2O2, 40℃ of reaction temperature. The removal rate of DBT in the model oil up to 93.4% in the 160 min under the optimal reaction condition. The result show that the apparent activation energy is pretty low, and the desulfurization rate is slightly decreased after 5 cycles. There are high catalytic activity and stability for the DESs.
出处
《化学工程》
CAS
CSCD
北大核心
2017年第5期6-10,共5页
Chemical Engineering(China)
关键词
低共熔溶剂
活化能
分析
二苯并噻吩
脱硫率
deep euteetic solvents
activation energy
analysis
DBT
desulfurization rate
