Thermodynamic and experimental explorations of CO2 methanation over highly active metal-free fibrous silica-beta zeolite (FS@SiO2-BEA) of innovative morphology

Hussain, I. and A. A., Jalil and S. M., Izan and M. S., Azami and K., Kidam and Nurul Aini, Razali and A., Ripin (2021) Thermodynamic and experimental explorations of CO2 methanation over highly active metal-free fibrous silica-beta zeolite (FS@SiO2-BEA) of innovative morphology. Chemical Engineering Science, 229 (116015). pp. 1-14. ISSN 0009-2509. (Published)

Preview

Pdf
Thermodynamic and experimental explorations of CO2 methanation over highly .pdf
Download (566kB) | Preview

Pdf
Thermodynamic and experimental explorations of CO2 methanation over highly_FULL.pdf
Restricted to Repository staff only
Download (4MB) | Request a copy

DOI/Official URL: https://doi.org/10.1016/j.ces.2020.116015

Abstract

CO2 methanation is a novel way for climate change mitigation by converting CO2 into substitute natural gas. In this study, a highly active fibrous silica-beta zeolite (FS@SiO2-BEA) catalyst was prepared for CO2 methanation by a microemulsion process, and examined by N2 adsorption–desorption, field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), and electron spin resonance (ESR) spectroscopy techniques. It was found that the FS@SiO2-BEA catalyst possessed a fibrous silica morphology, leading to high surface area (609 m2/g), oxygen vacancies, and basicity. A thermodynamic study was also carried out using Gibbs free energy minimization method, and it was found that low temperatures (25–350 °C) and high H2: CO2 ≥ 4 ratios have enhanced the CO2 methanation activity. The prepared FS@SiO2-BEA catalyst exhibited high CO2 conversion (65%), and CH4 selectivity (61%) with a space–time yield of 3.30 g gcat−1 h−1. The obtained experimental results highly followed the thermodynamic calculations.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	CO2 methanation; Fibrous silica-beta zeolite; Gibbs free energy minimization; Microemulsion; Thermodynamics; Substitute natural gas
Subjects:	T Technology > TP Chemical technology
Faculty/Division:	College of Engineering Faculty of Chemical and Process Engineering Technology
Depositing User:	Mrs Norsaini Abdul Samat
Date Deposited:	28 Oct 2021 07:12
Last Modified:	28 Oct 2021 07:12
URI:	http://umpir.ump.edu.my/id/eprint/29707
Download Statistic:	View Download Statistics

Actions (login required)

View Item