Synthesis of ZSM-5/Siliceous Zeolite Composites for Improvement of Hydrophobic Adsorption of Volatile Organic Compounds

Frontiers in Chemistry
Renna LiQiang Wang

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°C, while, the largest contact angle of ZSM-5/MCM-41-75% was 17.0° 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 conce...Continue Reading

References

Jan 30, 2007·Environmental Science & Technology·Hefa Cheng, Martin Reinhard
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May 24, 2017·Journal of Hazardous Materials·Xueyang ZhangYuncong Li

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Citations

Mar 3, 2020·Frontiers in Chemistry·Jingze HuChunmao Chen
Jan 7, 2021·Applied Biochemistry and Biotechnology·Iemedelais BordinMarcelo Luis Mignoni
Mar 27, 2021·Annual Review of Chemical and Biomolecular Engineering·M Thommes, C Schlumberger

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Methods Mentioned

BETA
X-ray
scanning electron microscopy

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