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Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol

In this paper, the molecular sieve NaZSM-5 was modified with zirconium dioxide (ZrO(2)) by a hydrothermal coating process and other methods. By comparing the effects of the crystal phase structure of ZrO(2) and the compositing method on the physicochemical properties and catalytic performance of the...

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Autores principales: Yang, Tinglong, Yao, Mengqin, Ma, Jun, Chen, Peng, Zhao, Tianxiang, Yang, Chunliang, Liu, Fei, Cao, Jianxin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9181951/
https://www.ncbi.nlm.nih.gov/pubmed/35683659
http://dx.doi.org/10.3390/nano12111803
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author Yang, Tinglong
Yao, Mengqin
Ma, Jun
Chen, Peng
Zhao, Tianxiang
Yang, Chunliang
Liu, Fei
Cao, Jianxin
author_facet Yang, Tinglong
Yao, Mengqin
Ma, Jun
Chen, Peng
Zhao, Tianxiang
Yang, Chunliang
Liu, Fei
Cao, Jianxin
author_sort Yang, Tinglong
collection PubMed
description In this paper, the molecular sieve NaZSM-5 was modified with zirconium dioxide (ZrO(2)) by a hydrothermal coating process and other methods. By comparing the effects of the crystal phase structure of ZrO(2) and the compositing method on the physicochemical properties and catalytic performance of the obtained composites, the structure–performance relationship of these composite catalysts was revealed. The results indicate that in the hydrothermal system used for the preparation of NaZSM-5, Zr(4+) is more likely to dissolve from m-ZrO(2) than from t-ZrO(2), which can subsequently enter the molecular sieve, causing a greater degree of desiliconization of the framework. The larger specific surface area (360 m(2)/g) and pore volume (0.52 cm(3)/g) of the m-ZrO(2)/NaZSM-5 composite catalyst increase the exposure of its abundant acidic (0.078 mmol/g) and basic (0.081 mmol/g) active centers compared with other composites. Therefore, this catalyst exhibits a shorter induction period and better catalytic performance. Furthermore, compared with the impregnation method and mechanochemical method, the hydrothermal coating method produces a greater variety of acid–base active centers in the composite catalyst due to the hydrothermal modifying effect.
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spelling pubmed-91819512022-06-10 Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol Yang, Tinglong Yao, Mengqin Ma, Jun Chen, Peng Zhao, Tianxiang Yang, Chunliang Liu, Fei Cao, Jianxin Nanomaterials (Basel) Article In this paper, the molecular sieve NaZSM-5 was modified with zirconium dioxide (ZrO(2)) by a hydrothermal coating process and other methods. By comparing the effects of the crystal phase structure of ZrO(2) and the compositing method on the physicochemical properties and catalytic performance of the obtained composites, the structure–performance relationship of these composite catalysts was revealed. The results indicate that in the hydrothermal system used for the preparation of NaZSM-5, Zr(4+) is more likely to dissolve from m-ZrO(2) than from t-ZrO(2), which can subsequently enter the molecular sieve, causing a greater degree of desiliconization of the framework. The larger specific surface area (360 m(2)/g) and pore volume (0.52 cm(3)/g) of the m-ZrO(2)/NaZSM-5 composite catalyst increase the exposure of its abundant acidic (0.078 mmol/g) and basic (0.081 mmol/g) active centers compared with other composites. Therefore, this catalyst exhibits a shorter induction period and better catalytic performance. Furthermore, compared with the impregnation method and mechanochemical method, the hydrothermal coating method produces a greater variety of acid–base active centers in the composite catalyst due to the hydrothermal modifying effect. MDPI 2022-05-25 /pmc/articles/PMC9181951/ /pubmed/35683659 http://dx.doi.org/10.3390/nano12111803 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yang, Tinglong
Yao, Mengqin
Ma, Jun
Chen, Peng
Zhao, Tianxiang
Yang, Chunliang
Liu, Fei
Cao, Jianxin
Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol
title Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol
title_full Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol
title_fullStr Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol
title_full_unstemmed Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol
title_short Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol
title_sort role of zirconia in oxide-zeolite composite for thiolation of methanol with hydrogen sulfide to methanethiol
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9181951/
https://www.ncbi.nlm.nih.gov/pubmed/35683659
http://dx.doi.org/10.3390/nano12111803
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