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Front Chem

Title:		Synthesis of ZSM-5/Siliceous Zeolite Composites for Improvement of Hydrophobic Adsorption of Volatile Organic Compounds
Author(s):		Li R; Chong S; Altaf N; Gao Y; Louis B; Wang Q;
Address:		"College of Environmental Science and Engineering, Beijing Forestry University, Beijing, China. ICPEES - Institut de Chimie et Procedes pour l'Energie, l'Environnement et la Sante, UMR 7515 CNRS - Universite de Strasbourg, Strasbourg, France"
Journal Title:		Front Chem
Year:		2019
Volume:		20190716
Issue:
Page Number:		505 -
DOI:		10.3389/fchem.2019.00505
ISSN/ISBN:		2296-2646 (Print) 2296-2646 (Electronic) 2296-2646 (Linking)
Abstract:		"In this research, we investigated the hydrophobicity and dynamic adsorption-desorption behaviors of volatile organic compounds (VOCs) by applying different optimized coating dosage (25, 50, and 75%) on designed novel ZSM-5/MCM-41 and ZSM-5/Silicalite-1 hierarchical composites. The relatively large specific surface area and pore volume of adsorbents ZSM-5/MCM-41 and ZSM-5/Silicalite-1 composites with excellent stability were affirmed by ex-situ XRD, FTIR, BET, SEM, and water contact angle analyses. Regarding, toluene adsorption-desorption investigation, ZSM-5/MCM-41 composite lead a longer stable toluene breakthrough time no matter under dry or 50% humid conditions. However, under different loading dosage condition, the breakthrough time of 75% coating ratio was the longest, which was 1.6 times as long as that of pure ZSM-5 under wet adsorption. Meanwhile, the complete elimination of toluene for ZSM-5/MCM-41-75% was done by largest desorption peak area and the lowest desorption temperature of 101.9 degrees C, while, the largest contact angle of ZSM-5/MCM-41-75% was 17.0 degrees higher than pure ZSM-5 zeolite. Therefore, we believe that the present hydrophobic sorbent will provide new insight with great research potential for removing low concentration of VOCs at industrial scale"
Keywords:		Zsm-5 composite materials hydrophobicity evaluation siliceous zeolite toluene adsorption;
Notes:		"PubMed-not-MEDLINELi, Renna Chong, Shijia Altaf, Naveed Gao, Yanshan Louis, Benoit Wang, Qiang eng Switzerland 2019/08/06 Front Chem. 2019 Jul 16; 7:505. doi: 10.3389/fchem.2019.00505. eCollection 2019"