Hydrophobic HY zeolite with enhanced stability in hot liquid water

IF 2.2 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Iranian Chemical Society Pub Date : 2025-01-07 DOI:10.1007/s13738-024-03157-w

Yuni Susanti, Ainul Maghfirah, Adroit T. N. Fajar, Rino R. Mukti, Grandprix T. M. Kadja

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引用次数: 0

Abstract

The low tolerance of zeolite in hot liquid water (HLW) could induce crystalline structure destruction and decrease the catalytic activity in aqueous system. Herein, we report modification on the zeolite external surface using organosilane to enhance the hydrophobicity. Pristine NaY was synthesized with a Si/Al ratio of 2.314. HY parent was prepared by ion exchange of NaY zeolite in ammonium chloride solution 0.1 M. External surface of HY zeolite was modified with 3-Aminopropyltriethoxysilane (APTES-HY). The structural stability of HY parent and modified HY after exposure to HLW was investigated at various times (0.5, 1, 2, 4, 10, and 72 h) at 200 °C. The modification with organosilane led to enhanced hydrophobicity and stability in the biphasic system. It was confirmed by XRD and SEM characterizations where the crystallinity and morphology of the treated APTES-HY were more preserved compared to the treated HY parent. XRF characterization showed that the ratio of Si/Al decreased as the time of HLW treatment increased. The decreasing trend of Si/Al ratio might be due to the hydrolysis of Si⁴⁺ species from zeolite framework. TGA characterization supports that organic compound protects the external surface of zeolite from degradation in a HLW environment. These studies are expected to upgrade the applications of hydrophobic zeolite as a catalyst in biomass conversion.

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来源期刊

Journal of the Iranian Chemical Society 化学-化学综合

CiteScore

4.40

自引率

8.30%

发文量

230

审稿时长

5.6 months

期刊介绍： JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.