Influence of microwave drying of silica support on properties of Cu/SiO2 catalyst for CO2 hydrogenation

Journal article

Authors/Editors

SAKAMON DEVAHASTIN

Strategic Research Themes

Materials synthesis and Characterization (Innovative Materials, Manufacturing and Construction)

Publication Details

Author list: Niamnuy C.; Devahastin S.; Charoenpanich M.; Witoon T.; Seubsai A.; Panchan N.; Nintao N.

Publisher: Taylor and Francis Group

Publication year: 2025

Journal: Drying Technology (0737-3937)

Volume number: 43

Issue number: 10

Start page: 1575

End page: 1592

Number of pages: 18

ISSN: 0737-3937

eISSN: 1532-2300

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-105013750782&doi=10.1080%2F07373937.2025.2546901&partnerID=40&md5=65289d8ee3dd961ccf8c29400b15df71

Languages: English-Great Britain (EN-GB)

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Abstract

Carbon dioxide (CO2) hydrogenation represents an alternative catalytic approach for converting CO2 into valuable chemical compounds, mainly methanol. The drying process of the support could directly affect the structural characteristics and performance of the support and catalyst for methanol production. Silica, a ubiquitous material, has been applied extensively as a catalyst in the CO2 hydrogenation process. This work studied the effect of microwave (MW) drying on the properties of a silica support and a Cu/SiO2 catalyst. MW drying of the support at 600 and 1000 W shortened the drying time by 86 and 92%, respectively, compared to hot-air (HA) drying at 100 °C. The properties of the silica support and the Cu/SiO2 catalysts were characterized using N2-sorption, X-ray diffraction, field emission scanning electron microscopy, field emission transmission electron microscopy, inductively coupled plasma-optical emission spectrometry, H2-temperature-programmed reduction, NH3-temperature-programmed desorption, and X-ray photoelectron spectroscopy. All prepared Cu/SiO2 catalysts had methanol and DME space-time yields in 130–355 and 5–20 g/kgcat⋅h, respectively. Cu/SiO2- MW600 catalyst exhibited the highest DME selectivity and DME space-time. On the other hand, Cu/SiO2-MW1000 catalyst achieved the highest methanol selectivity and space-time yield, as well as the highest methanol purity. This catalyst showed excellent catalytic stability over a 24-h period of CO2 hydrogenation reaction. © 2025 Elsevier B.V., All rights reserved.

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