Kinetic exploration of CO2 methanation over nickel loaded on fibrous mesoporous silica nanoparticles (CHE-SM)

Muhammad Akmal, Aziz and Aishah, Abdul Jalil and Nurul Sahida, Hassan and Mahadi, Bahari and Abdul Hakim, Hatta and Tuan Amran, Abdullah and Nurfatehah Wahyu, Che Jusoh and Herma Dina, Setiabudi and Saravanan, Rajendran (2024) Kinetic exploration of CO2 methanation over nickel loaded on fibrous mesoporous silica nanoparticles (CHE-SM). Process Safety and Environmental Protection, 186. pp. 1229-1241. ISSN 0957-5820. (Published)

	Pdf Kinetic exploration of CO2 methanation over nickel loaded on fibrous.pdf Restricted to Repository staff only Download (3MB) | Request a copy
Preview	Pdf Kinetic exploration of CO2 methanation over nickel loaded on fibrous mesoporous silica nanoparticles (CHE-SM)_ABS.pdf Download (273kB) | Preview

Abstract

A novel series of nickel (Ni) loaded on Fibrous Mesoporous Silica Nanoparticles (CHE-SM) support with varying Ni contents (x=1–30 wt%) were synthesized, denoted as xNi/CHE-SM and then investigated for carbon dioxide (CO2) methanation. The catalysts underwent comprehensive characterization using XRD, N2 adsorption-desorption, FESEM, FTIR-KBr, H2-TPR, and CO2-TPD techniques. The XRD and FESEM analyses confirmed the structural integrity of CHE-SM, irrespective of the Ni loading. However, the size of the nanocrystalline NiO particles appeared to be influenced by the Ni loading. Notably, 20Ni/CHE-SM exhibited the highest CO2 conversion of 92% at 350 °C, demonstrating its potential for low-temperature activation. H2-TPR and CO2-TPD results revealed favorable NiO reduction at lower temperatures, indicating medium-strength basicity that facilitated efficient CO2 and H2 adsorption and activation. Consequently, 20Ni/CHE-SM exhibited superior catalytic performance compared to other catalysts, with lower activation energy (61.5 kJ/mol). Kinetic studies focusing on 20Ni/CHE-SM indicated a molecular adsorption mechanism of CO2 and H2 on a single site after evaluation using four Langmuir-Hinshelwood models. This result was attributed to the high amount of medium strength basicity possessed by the 20Ni/CHE-SM catalyst which provided an abundance of adsorption sites, resulting in greater fractional coverage of reactants and enhancing the CH4 formation rate.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	CO2 methanation; Kinetic analysis; Low-temperature activation; Ni/CHE-SM
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:	Faculty of Chemical and Process Engineering Technology
Depositing User:	Mr Muhamad Firdaus Janih@Jaini
Date Deposited:	01 Jul 2024 01:25
Last Modified:	01 Jul 2024 01:25
URI:	http://umpir.ump.edu.my/id/eprint/41398
Download Statistic:	View Download Statistics

Actions (login required)

View Item