RESEARCH ARTICLE
Thermodynamic analysis of steam reforming of glycerol for hydrogen production at atmospheric pressure
. Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Manchester M13 9PL, UK.. Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai 200237, China.. School of Chemical Engineering and Technology, National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
Received: 2020-08-25
Accepted: 2020-10-29
Available online: 2020-10-29
Abstract
Thermodynamic chemical equilibrium analysis of steam reforming of glycerol (SRG) for selective hydrogen production was performed based on the Gibbs free energy minimisation method. The ideal SRG reaction (C H O +3H O→3CO +7H ) and a comprehensive set of side reactions during SRG are considered for the formation of a wide range of products. Specifically, this work focused on the analysis of formation of H CO , CO and CH in the gas phase and determination of the carbon free region in SRG under the conditions at atmospheric pressure, 600K–1100K and 1.013 × 10 –1.013 × 10 Pa with the steam-to-glycerol feed ratios (SGFR) of 1:5–10. The reaction conditions which favoured SRG for H production with minimum coke formation were identifies as: atmospheric pressure, temperatures of 900K–1050K and SGFR of 10:1. The influence of using the inert carrier gas (i.e., N ) in SRG was studied as well at atmospheric pressure. Although the presence of N in the stream decreased the partial pressure of reactants, it was beneficial to improve the equilibrium yield of H . Under both conditions of SRG (with/without inert gas), the CH production is minimised, and carbon formation was thermodynamically unfavoured at steam rich conditions of SGFR>5:1.
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