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

I. Hussain; A. A. Jalil; S. M. Izan; M. S. Azami; K. Kidam; N. Ainirazali; A. Ripin

doi:10.1016/j.ces.2020.116015

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

I. Hussain, A. A. Jalil^*, S. M. Izan, M. S. Azami, K. Kidam, N. Ainirazali, A. Ripin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

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 g_cat⁻¹ h⁻¹. The obtained experimental results highly followed the thermodynamic calculations.

Original language	English
Article number	116015
Journal	Chemical Engineering Science
Volume	229
DOIs	https://doi.org/10.1016/j.ces.2020.116015
State	Published - 16 Jan 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

CO methanation
Fibrous silica-beta zeolite
Gibbs free energy minimization
Microemulsion
Substitute natural gas
Thermodynamics

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ces.2020.116015

Cite this

@article{aeb1fd55e6134ea9848205c290eb7fb0,

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

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.",

keywords = "CO methanation, Fibrous silica-beta zeolite, Gibbs free energy minimization, Microemulsion, Substitute natural gas, Thermodynamics",

author = "I. Hussain and Jalil, \{A. A.\} and Izan, \{S. M.\} and Azami, \{M. S.\} and K. Kidam and N. Ainirazali and A. Ripin",

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year = "2021",

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doi = "10.1016/j.ces.2020.116015",

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AU - Hussain, I.

AU - Jalil, A. A.

AU - Izan, S. M.

AU - Azami, M. S.

AU - Kidam, K.

AU - Ainirazali, N.

AU - Ripin, A.

PY - 2021/1/16

Y1 - 2021/1/16

N2 - 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.

AB - 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.

KW - CO methanation

KW - Fibrous silica-beta zeolite

KW - Gibbs free energy minimization

KW - Microemulsion

KW - Substitute natural gas

KW - Thermodynamics

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