Hamidah, Abdullah and Khan, Md. Maksudur Rahman and Zahira, Yaakob and Nur Aminatulmimi, Ismail (2019) A kinetic model for the photocatalytic reduction of CO2 to methanol pathways. In: IOP Conference Series: Materials Science and Engineering; 1st Process Systems Engineering and Safety Symposium 2019, ProSES 2019 , 4 September 2019 , Kuantan, Pahang, Malaysia. pp. 1-8., 702 (012026). ISSN 1757-8981
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Abstract
Carbon dioxide (CO2) is one of the greenhouse gases that contribute to global warming. CO2 could be converted to valuable products such as hydrocarbons through the photocatalytic process. The aim of this research was to develop the kinetic model for the photocatalytic reduction of CO2 to methanol (CH3OH) in liquid phase reaction using cerium oxide-titanium dioxide (CeO2-TiO2) catalyst. The Langmuir-Hinshelwood approach was used in developing rate laws for the catalytic reaction using the catalytic reaction mechanism proposed. The catalytic reaction mechanism is about the adsorption of reactant (CO2 dissolved in the liquid phase), the reaction on catalyst surface and desorption of product. The experimental kinetic data were evaluated in the Polymath 6.1 software. In this study, two types of mechanism are proposed whereas one is considered the carbon monoxide (CO) oxidation while the other is not. Based on the model fitting, it was found that the model considers the CO oxidation is fitted well with the experimental data represents that the oxidation reaction of intermediate product, CO is the rate-determining step in the photocatalytic reduction of CO2 to CH3OH in liquid phase reaction.
| Item Type: | Conference or Workshop Item (Lecture) |
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| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Catalytic reaction mechanism; Experimental kinetics; Intermediate product; Langmuir-Hinshelwood; Liquid-phase reaction; Photocatalytic process; Photocatalytic reduction; Rate determining step |
| Subjects: | Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
| Faculty/Division: | Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology |
| Depositing User: | Mr Muhamad Firdaus Janih@Jaini |
| Date Deposited: | 27 Dec 2022 03:31 |
| Last Modified: | 27 Dec 2022 03:31 |
| URI: | http://umpir.ump.edu.my/id/eprint/35836 |
| Download Statistic: | View Download Statistics |
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