Purification of Aromatics over a Promising SO_4^(2-)/ZrO_2 Catalyst

作     者：Zhao Qing Liu Jianfei Yao Jiajia Shi Li Wang Xin 

作者机构：The State Key Laboratory of Chemical Engineering East China University of Science and Technology 

出 版 物：《China Petroleum Processing & Petrochemical Technology》 (中国炼油与石油化工（英文版）)

年 卷 期：2016年第18卷第3期

页      面：49-56页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

主　　题：aromatics sulfated zirconia purification olefin conversion catalyst 

摘      要：A promising sulfated zirconia(SZ) was successfully synthesized to remove olefins from aromatics. The effects of type and quantity of precipitant, the concentration of impregnants and the calcination temperature were studied, and the synthesized samples were characterized by XRD, SEM, TG-DTG, FTIR, N_2 adsorption analysis and the FTIR pyridine adsorption(py-IR) techniques. This catalyst was found to be superiorly active as compared with the commercial ROC, which exhibited promising application prospects in industry. The optimum synthesis variables required that SZ was impregnated with 2.0 mol/L sulfuric acid and calcined at 650 ℃, and the precursor was precipitated by ammonium hydroxide to reach eventually a p H value of over 9.46. The addition of SO_4^(2-) species increased the amount of catalytically active t-ZrO_2, which was helpful to an increasing abundance of acid sites for enhancing the activity. Meanwhile, the calcination temperature had a great effect on the structure, composition and properties of sulfated zirconia.