文献类型：期刊文献

英文题名：Study of the inner surface silanization of zeolite to improve the toluene capture ability in humid environment and fixed-bed adsorption kinetics analysis

作者：Yin, Tao[1];Xu, Jiawen[1];Li, Yanyao[1];Liu, Naiwang[1];Meng, Xuan[1];Shi, Li[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：371

外文期刊名：FUEL

收录：;EI(收录号：20242116121574);WOS:【SCI-EXPANDED(收录号:WOS:001345674800001)】；

基金：The authors acknowledge the lab of Prof. Johannes Lercher at Technical University of Munich for providing the kinetics testing methods and instruments, and this work was supported by National Science Foundation for Young Scientists of China (No. 21706065) .

语种：英文

外文关键词：Zeolites; Silanization; Hydrophobicity; Adsorption; VOCs

摘要：Although Y zeolites are considered as a promising adsorbent for capturing volatile organic compounds (VOCs), its hydrophilic nature causes a significantly decrease in VOCs adsorption performance due to the pervasive water vapor in VOCs streams. Herein, a facile approach is proposed to significantly enhance the hydrophobicity by grafting methyl on the inner surface of Y zeolite. Attachment of methyl to the inner surface leads to a significant reduction in water affinity, resulting in a notable enhancement of toluene adsorption capacity in humid environment. The silanization process and the evolution of silane species are further elucidated through in-situ DRIFTS, NMR and TGA. Adsorption kinetics reveals that inner surface silanization reduces the adsorption rate constant of water by 50 %. However, the outer surface silanization with propyl is ineffective in mitigating the detrimental impact of water on the toluene adsorption. Moreover, Yoon-Nelson (Y-N) model analysis is applied to predict the breakthrough characteristics of fixed-bed adsorption and to evaluate the applicability in actual industry. In this work, this regioselective silanization approach could provide a facile strategy for controlling VOCs in humid environment.