Thermodynamic analysis of steam reforming of glycerol for hydrogen production at atmospheric pressure

doi:10.1007/s11705-020-1975-0

Frontiers of Chemical Science and Engineering

2021, Vol. 15

Issue (1): 60-71 https://doi.org/10.1007/s11705-020-1975-0

本期目录

Thermodynamic analysis of steam reforming of glycerol for hydrogen production at atmospheric pressure

Ammaru Ismaila¹, Xueli Chen², Xin Gao^1,³(

), Xiaolei Fan¹(

)

¹. Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Manchester M13 9PL, UK
². Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai 200237, China
³. 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

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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 (C₃H₈O₃+3H₂O→3CO₂+7H₂) 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_2, CO₂, CO and CH₄ in the gas phase and determination of the carbon free region in SRG under the conditions at atmospheric pressure, 600 K–1100 K and 1.013 × 10⁵–1.013 × 10⁶ Pa with the steam-to-glycerol feed ratios (SGFR) of 1:5–10. The reaction conditions which favoured SRG for H₂ production with minimum coke formation were identifies as: atmospheric pressure, temperatures of 900 K–1050 K and SGFR of 10:1. The influence of using the inert carrier gas (i.e., N₂) in SRG was studied as well at atmospheric pressure. Although the presence of N₂ in the stream decreased the partial pressure of reactants, it was beneficial to improve the equilibrium yield of H₂. Under both conditions of SRG (with/without inert gas), the CH₄ production is minimised, and carbon formation was thermodynamically unfavoured at steam rich conditions of SGFR>5:1.

Key words： steam reforming of glycerol H₂ N₂ carbon deposition thermodynamic analysis Gibbs free energy minimisation

收稿日期: 2020-02-29 出版日期: 2021-01-12

Corresponding Author(s): Xin Gao,Xiaolei Fan

引用本文:

. [J]. Frontiers of Chemical Science and Engineering, 2021, 15(1): 60-71.
Ammaru Ismaila, Xueli Chen, Xin Gao, Xiaolei Fan. Thermodynamic analysis of steam reforming of glycerol for hydrogen production at atmospheric pressure. Front. Chem. Sci. Eng., 2021, 15(1): 60-71.

链接本文:

https://academic.hep.com.cn/fcse/CN/10.1007/s11705-020-1975-0
https://academic.hep.com.cn/fcse/CN/Y2021/V15/I1/60

Parameter	Formula
Glycerol conversion	$X g l y c e r o l (%) = F g l y c e r o l i n − F g l y c e r o l o u t F g l y c e r o l i n × 100$
Hydrogen yield	$Y H 2 (%) = F H 2 o u t 7 × F g l y c e r o l i n × 100$
Yield of C-containing product i	$Y i (%) = ♯ c F i o u t 3 × F g l y c e r o l i n × 100$
Molar fraction	$M F = n i o u t n t o t a l o u t$
Product selectivity	$S i (%) = F i o u t ∑ j F j o u t × 100$
CO₂ ratio	$CO 2 CO x = F CO 2 o u t F CO 2 o u t + F CO o u t$

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