文献类型：期刊文献

英文题名：Prepared hydrophobic Y zeolite for adsorbing toluene in humid environment

作者：Yin, Tao[1];Meng, Xuan[1];Jin, Linpeng[1];Yang, Chao[1];Liu, Naiwang[1];Shi, Li[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：305

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20202208774302);WOS:【SCI-EXPANDED(收录号:WOS:000551659900026)】；

基金：Project financially supported by the National Science Foundation for Young Scientists of China (No. 21706065); the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-18C02); China Postdoctoral Science Foundation (NO.2017M621389), Shanghai Sailing Program (NO.18YF1406300), and Explore and Research Foundation for Youth Scholars of Ministry of Education of China (NO. 222201814011).

语种：英文

外文关键词：Y zeolite; Adsorption; Hydrophobicity; Ion-exchange; Toluene

摘要：Decontamination of air or other gas streams loaded with low-concentration volatile organic compounds (VOCs) and high humidity is a prevalent task for adsorption using zeolites. Hydrophobic adsorbents were prepared with NaY zeolites as raw materials by the high-temperature hydrothermal treatment, and the degree of ion-exchange was considered as a key factor. Adsorbents were characterized by XRD, FTIR spectra, N-2 adsorption-desorption isotherm, SEM, water contact angle, TG/DTG, and the adsorption capacities of water and toluene were evaluated by static adsorption test and dynamic adsorption breakthrough study. The results showed that high degree of ion-exchange was beneficial to dealumination from zeolite skeleton and crystal of zeolite remains intact in the high-temperature hydrothermal treatment. The framework silicon-aluminum ratio (SiO2/Al2O3) of modified zeolite obtained by high-temperature hydrothermal treatment reached 12.41 while the degree of ion-exchange was three (SY-3). Moreover, the hydrophobic index (HI) of SY-3 increased from 0.047 of initial NaY zeolite to 10.059. In addition, regeneration of SY-3 was easier than that of initial NaY zeolite. Our work also has further studied the mass transfer in the zeolite and mechanism of high-temperature hydrothermal treatment under the effect of different ion-exchange degree.