Insight into the effect of gel drying temperature on the structure and desulfurization performance of ZnO/SiO_(2)adsorbents

作     者：Chao Yang Zhelin Su Yeshuang Wang Huiling Fan Meisheng Liang Zhaohui Chen Chao Yang;Zhelin Su;Yeshuang Wang;Huiling Fan;Meisheng Liang;Zhaohui Chen

作者机构：College of Environmental Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China State Key Laboratory of Clean and Efficient Coal UtilizationTaiyuan University of TechnologyTaiyuan 030024China State Key Laboratory of Multi-phase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2023年第56卷第4期

页      面：233-241页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National Natural Science Foundation of China(22078223 and 21878209) Shanxi Province Science Foundation for Youths(20210302123065) 

主　　题：Sol-gel method Drying temperature H_(2)S removal Zinc-silica composites Hydrogen bonds 

摘      要：A series of ZnO/SiO_(2) adsorbents were prepared by a sol-gel method using tetraethyl orthosilicate,ethylene glycol(EG)and nitrates as *** effect of gel drying temperature on the structure and desulfurization performance of the adsorbents were investigated in *** is found that the low drying temperature led to a weak interaction among EG,Si AOH/H_(2)O and the nitrates in the gel system,which caused the oxidation of EG by NO3-and formed zinc glyoxylate complex during the gel calcination process,whereas this oxidation process also occurred at a high drying temperature during the gel drying *** formed zinc glyoxylate complex promoted the generation of monodentate carbonate on the surface of Zn O,which resulted in the inferior desulfurization performance of adsorbents despite they have smaller Zn O *** gel dried at 120°C formed the hydrogen bonds between EG and Si AOH/H_(2)O and a strong interaction between zinc oxo-clusters and NO3-was also found in the gel system,which avoided the oxidation of EG by NO3-during the preparation process and the Zn O nanoparticles with sizes of 6 nm were formed by a combustion *** adsorbent affords a highest sulfur capacity of 104.9 mg·g^(-1) in this *** addition,the gel drying temperature has a significant influence on the textural properties of the adsorbents except their surface area.