Abstract
Glycerol to syngas conversion has been investigated under different reaction conditions like reaction temperature, feed ratio, and gas hourly space velocity (GHSV) over various binary oxides, i.e., MgO.Al 2 O 3 , CaO.Al 2 O 3 , and Al 2 O 3 prepared via a combination of simple sol-gel and wet impregnation techniques. The physicochemical characteristics of the materials were evaluated by BET, XRD, TPR, TPO, CO 2 -TPD, SEM, and TEM analysis analyses. The effects of catalyst support composition as well as metal oxides ratio in support formulation on the textural properties and catalytic performance were investigated in details. Among the examined catalysts, the Ni/CaO.Al 2 O 3 sample with 55% conversion of glycerol had a better catalytic performance in terms of activity, stability, and resistance to coke formation during reaction under the harsh reaction conditions (GHSV = 72000 ml/ (h g cat ) -1 ). The experimental results demonstrated that the Ni catalyst with an equal Ca/ AL molar ratio of support possessed the highest catalytic activity. Reaction conditions’ investigation proved that temperature and GHSV were mainly effective parameters but feed stream concentration of carbon dioxide did not directly contribute to the production of reaction products.
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