C_9H_(10)O_2-0.5ZnCl_2/Al_2O_3的制备及其氧化脱硫性能

通过将C_9H_(10)O_2-0.5ZnCl_2双酸型低共熔溶剂固载到Al_2O_3上制备了C_9H_(10)O_2-0.5ZnCl_2/Al_2O_3催化剂。该催化剂采用XRD、FT-IR、SEM、EDS、N_2吸附-脱附技术进行了分析。以C_9H_(10)O_2-0.5ZnCl_2/Al_2O_3为催化剂,过氧化氢为氧化剂研究模拟油中芳香族硫化物的脱除性能。考察反应参数如温度、催化剂加入量、O/S物质的量比、硫化物类型等对催化剂脱硫活性的影响。实验结果表明,在模拟油为5 mL、催化剂量为0.2 g、O/S比为8、反应温度为60℃、反应时间为180 min的条件下,模拟油中二苯并噻吩(DBT)脱硫率为99.2%。此外,在模拟油氧化脱硫中催化剂循环使用六次,其氧化脱硫活性略有降低。研究了C_9H_(10)O_2-0.5ZnCl_2/Al_2O_3催化氧化脱硫的反应机理。

Preparation of C9H10O2-0.5ZnCl2/Al2O3 and its oxidative desulfurization performance

A C₉H₁₀O₂-0.5ZnCl₂/Al₂O₃ catalyst was successfully prepared by immobilizing phenylpropionic acid-zinc chloride(C₉H₁₀O₂-0.5ZnCl₂) double acid deep eutectic solvent on Al₂O₃, and analyzed by XRD, FT-IR, SEM, EDS and N₂ adsorption-desorption. The removal activity for aromatic sulfides in model oil using C₉H₁₀O₂-0.5ZnCl₂/Al₂O₃ as catalysis and H₂O₂ as oxidant and the effect of some reaction parameters such as temperature, catalyst dosage, O/S molar ratio and different sulfide types on the desulfurization activity of catalyst were investigated. The experimental results show that with the model oil of 5 mL, the catalyst dosage of 0.2 g and the O/S molar ratio of 8, at temperature of 60℃and reaction time of 180 min, the removal rate of DBT can reach to 99.2%. In addition, the catalyst can be recycled up to 6 times with a little decrease in catalytic activity for the ODS process. The catalysis-oxidation desulfurization mechanism of C₉H₁₀O₂-0.5ZnCl₂/Al₂O₃ was also explored.