Indexed by:Journal Article

Date of Publication:2013-09-10

Journal:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

Included Journals:Scopus、EI、SCIE

Volume:38

Issue:27

Page Number:11902-11909

ISSN:0360-3199

Key Words:Sorption-enhanced steam reforming; Glycerol; High-purity hydrogen; NiO/NiAl2O4 catalyst; CaO sorbent

Abstract:In this study, the continuous sorption-enhanced steam reforming of glycerol to high-purity hydrogen production by a simultaneous flow concept of catalyst and sorbent for reaction and regeneration using two moving-bed reactors has been evaluated experimentally. A Ni-based catalyst (NiO/NiAl2O4) and a lime sorbent (CaO) were used for glycerol steam reforming with and without in-situ CO2 removal at 500 degrees C and 600 degrees C. The simultaneous regeneration of catalyst and sorbent was carried out with the mixture gas of N-2 and steam at 900 degrees C. The product gases were measured by a GC gas analyzer. It is obvious that the amounts of CO2, CO and CH4 were reduced in the sorption-enhanced steam reforming of glycerol, and the H-2 concentration is greatly increased in the pre-CO2 breakthrough periods within 10 min both 500 degrees C and 600 degrees C. The extended time of operation for high-purity hydrogen production and CO2 capture was obtained by the continuous sorption-enhanced steam reforming of glycerol. High-purity H-2 products of 93.9% and 96.1% were produced at 500 degrees C and 600 degrees C and very small amounts of CO2, CH4 and CO were formed. The decay in activity during the continuous reaction-regeneration of catalyst and sorbent was not observed. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.