Effect of drying conditions of supports on properties of metal catalyst for CO2 hydrogenation

Name: Nattawut Nintao

LCSH: Kasetsart University -- Theses. M.Eng. (Chemical Engineering) 2021

Classification :.LCCS: TP245.C4

LCSH: Kasetsart University. -- Department of Chemical Engineering -- Theses

LCSH: Carbon dioxide

LCSH: Metal catalysts

LCSH: Heterogeneous catalysis

LCSH: Hydrogenation

LCSH: Methanol

Abstract: Carbon dioxide (CO2) hydrogenation is an alternative catalytic process for the conversion of CO2 into methanol and dimethyl ether (DME). Silica and alumina were wildly used as catalyst support of copper catalysts that utilized in CO2 hydrogenation. Drying process is an effective physical process that could directly affect on the structural characteristics and performance of support. To enhance the structural properties of silica and alumina support, the effect of the using of hot air and microwave drying on the properties of silica and alumina support were evaluated. The microwave drying at the MW power of 600 and 1000 W could shorten the drying time by 86 and 92%, respectively, when compared with the drying time of hot air drying. Additionally, the microwave drying could be enhanced the particles distribution that resulted to the increasing of surface area and pore volume of supports. On the contrary, the hot air drying causes the particle aggregation of supports that resulted to the low surface area and pore volume of supports. The different properties of supports that dried by different drying techniques resulted to the properties of the copper catalysts. Silica and alumina supports have several different properties such as surface area, pore size, pore volume and acid sites. It was also resulted to the properties of the copper catalysts. The silica and alumina support showed the highest surface area and pore volume when the supports were dried by microwave drying at 1000 W. The Cu/SiO2- MW1000 catalyst exhibited the highest CO2 conversion. In addition, it showed the highest methanol selectivity and methanol space-time yield. On the other hand, the Cu/Al2O3-MW1000 catalyst exhibited the highest DME selectivity and DME spacetime yield. The catalytic stability of all prepared copper catalyst was noted to be excellent over the 4 h period of CO2 hydrogenation reaction.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Chalida Niamnuy

Role: Thesis Advisor

Name: Siripon Anantawaraskul

Role: Thesis CO-Advisor

Created: 2021

Modified: 2025-07-20

Issued: 2025-07-20

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2564/nattawut-nin-all.pdf

CallNumber: TP245.C4 .N38

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Chemical Engineering

Grantor: Kasetsart University

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