Hydrogen production via CO2 dry reforming of glycerol over Resingle bondNi/CaO catalysts

Nur Nabillah, Mohd Arif and Sumaiya, Zainal Abidin and Osazuwa, Osarieme U. and Vo, Dai-Viet N. and Mohammad Tazli, Azizan and Taufiq Yap, Yun-Hin (2019) Hydrogen production via CO2 dry reforming of glycerol over Resingle bondNi/CaO catalysts. International Journal of Hydrogen Energy, 44 (37). pp. 20857-20871. ISSN 0360-3199. (Published)

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Abstract

The present work investigates the performance of Re-promoted Nickel-based catalyst supported on calcium oxide for glycerol dry reforming reaction. The catalysts were prepared using wet impregnation method and their catalytic performance was tested in a packed bed reactor with CO2 to glycerol ratio (CGR) of 1–5, reaction temperature of 600–900 °C and gas hourly specific velocity (GHSV) of 1.44 × 104–7.20 × 104 ml gcat−1 s−1. The optimum operating temperature for both Ni/CaO and Resingle bondNi/CaO is 800 °C, with the GHSV of 3.6 × 104 mL gcat−1s−1. The optimum CGR for Ni/CaO and Resingle bondNi/CaO is 1.0 and 3.0, respectively. At this condition, hydrogen gas is directly produced from glycerol decomposition and indirectly from water-gas-shift reaction. After 2 h at the optimum conditions, 5% Resingle bondNi/CaO gives optimal glycerol conversion and hydrogen yield of approximately 61% and 56%, respectively, while in comparison to 15% Ni/CaO, the conversion and yield are 35 and 30%, respectively. Characterization of the spent catalysts showed the existence of whisker carbon from the CO2 hydrogenation and methanation processes. By comparing to 15% Ni/CaO, the addition of Re increases the acidic sites of the catalyst and enhanced the surface adsorption of OH group of the glycerol. The adsorbed glycerol on the catalyst surface would further react with the adsorbed CO2 to yield gases products. Thus, the catalytic activity improved significantly.

Item Type:	Article
Uncontrolled Keywords:	Glycerol; Dry reforming; Hydrogen; Nickel-based catalyst; Whisker carbon
Subjects:	T Technology > TP Chemical technology
Faculty/Division:	Centre of Excellence: Centre of Excellence for Advanced Research in Fluid Flow Faculty of Chemical & Natural Resources Engineering Institute of Postgraduate Studies
Depositing User:	Noorul Farina Arifin
Date Deposited:	10 May 2021 06:26
Last Modified:	10 May 2021 06:26
URI:	http://umpir.ump.edu.my/id/eprint/22041
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