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Cold plasma dielectric barrier discharge reactor for dry reforming of methane over Ni/ɤ-Al2O3-MgO nanocomposite

Khoja, Asif Hussain and Tahir, Muhammad and Saidina Amin, Nor Aishah (2018) Cold plasma dielectric barrier discharge reactor for dry reforming of methane over Ni/ɤ-Al2O3-MgO nanocomposite. Fuel Processing Technology, 178 . pp. 166-179. ISSN 0378-3820

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Official URL: http://dx.doi.org/10.1016/j.fuproc.2018.05.030

Abstract

Dry reforming of methane (DRM) to syngas in a dielectric barrier discharge (DBD) plasma reactor over Ni-loaded ɤ-Al2O3-MgO nanocomposite catalysts has been investigated. The catalysts are prepared by modified incipient wetness impregnation method, assisted by cold plasma treatment. The samples are characterized by XRD, N2 adsorption-desorption, H2-TPR, CO2-TPD, FESEM and EDX. The performance of the catalyst for DRM is evaluated at various specific input energy (SIE J ml−1) and gas hourly space velocity (GHSV, h−1). The maximum conversion achieved are 74.5% and 73% for CH4 and CO2 respectively, over 10% Ni/ɤ-Al2O3-MgO at specific input energy (SIE) = 300 J ml−1 and gas hourly space velocity (GHSV) = 364 h−1. The main reaction products are H2 (29.5%), CO (30.5%) with H2/CO = 1 inferring RWGS reaction is suppressed for 12 h operation time. The enhanced conversion and yield are due to the strong metal-support interaction, high Lewis basicity and stable 10% Ni/ɤ-Al2O3-MgO catalyst as well as the plasma-catalyst interface. The energy efficiency (EE) of the plasma-catalytic DRM is higher (0.117 mmol kJ−1) compared to plasma only (0.087 mmol kJ−1) demonstrating the synergy between catalyst and plasma. The reaction mechanism is also proposed to postulate the steps involved in the DRM.

Item Type:Article
Uncontrolled Keywords:Energy efficiency, Non-thermal plasma
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:85028
Deposited By: Widya Wahid
Deposited On:29 Feb 2020 21:22
Last Modified:29 Feb 2020 21:22

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