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Hydrogen production from glycerol dry reforming over Ag-promoted Ni/Al 2 O 3

Harun, N. and Abidin, S.Z. and Osazuwa, O.U. and Taufiq-Yap, Y.H. and Azizan, M.T. (2019) Hydrogen production from glycerol dry reforming over Ag-promoted Ni/Al 2 O 3. International Journal of Hydrogen Energy . pp. 213-225.

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Abstract

In recent times, glycerol has been employed as feedstock for the production of syngas (H 2 and CO) with H 2 as its main constituent. This study centers on dry reforming of glycerol over Ag-promoted Ni/Al 2 O 3 catalysts. Prior to characterization, the catalysts were synthesized using the wet impregnation method. The reforming process was carried out using a fixed bed reactor at reactor operating conditions; 873�1173 K, carbon dioxide to glycerol ratio of 0.5 and gas hourly space velocity (WHSV) in the range of 14.4 � 72 L g cat �1 h �1 ). Ag (3)-Ni/Al 2 O 3 gave highest glycerol conversion and hydrogen yield of 40.7 and 32, respectively. The optimum conditions which gave highest H 2 production, minimized methane production and carbon deposition were reaction temperature of 1073 K and carbon dioxide to glycerol ratio of 1:1. This result can attributed to the small metal crystallite size characteristics possessed by Ag (3)�Ni/Al 2 O 3 , which enhanced metal dispersion in the catalyst matrix. Characterization of the spent catalyst revealed the formation of two types of carbon species; encapsulating and filamentous carbon which can be oxidized by O 2 . © 2018 Hydrogen Energy Publications LLC

Item Type:Article
Impact Factor:cited By 0
Uncontrolled Keywords:Carbon dioxide; Catalysts; Chemical reactors; Crystallite size; Glycerol; Hydrogen; Silver; Synthesis gas, Dry reforming; Gas hourly space velocities; Glycerol conversions; Nickel based catalysts; Operating condition; Reaction temperature; Syn-gas; Wet impregnation method, Hydrogen production
ID Code:22276
Deposited By: Ahmad Suhairi
Deposited On:28 Feb 2019 02:43
Last Modified:28 Feb 2019 02:43

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