Hydrogen Production by Water Gas Shift Reaction Following Dry Reforming of Biogas Methane in Membrane and Packed Bed Tubular Reactors
type: CreativeWork
description: The goal of this study was to develop a high performance catalyst for the water gas shift reaction of reformate gas obtained from the dry reforming of biogas methane, in order to produce bio-renewable hydrogen suitable for feed to a fuel cell. Accordingly, three phases of the study were executed involving the identification and optimization of the catalyst, application in a membrane reactor and kinetic studies of the water gas shift reaction. A portfolio of ternary oxide catalysts with a nominal composition of 3Ni5Cu/CeZrM (where M = La, Mg, Y, Gd, Ca) were developed and prepared by surfactant assisted route. A binary oxide catalyst was also prepared to serve as a benchmark for comparing the effect of incorporating a promoter element. The catalysts were screened for the water gas shift reaction at 500oC at atmospheric pressure in a packed bed tubular reactor using 30% CO/balance N2 gas and the catalyst with Ca promoter element showed the best performance. This catalyst was further tested using reformate gas comprising of 46.2%CO, 8.5% CH4, 7.2% CO2 and 38.1 % H2 to simulate a realistic product stream from a biogas dry reformer. Again, the Ca catalyst fared well even under such conditions without any deactivation, making it a potential candidate for possible commercialization. To optimize the catalyst preparation method, the method of impregnation was varied using atmospheric pressure or vacuum conditions; the amount of surfactant used and calcination temperature were also varied. Subsequently, the operating conditions were also varied including reaction temperature, steam/CO ratio and reactor pressure. An extended TOS stability test was performed for 12 hours to evaluate the continuous performance of the catalyst over extended time duration. Several characterization techniques were also employed to investigate the correlation between the catalyst structure and the performance exhibited. The techniques employed include TPR, TPO, XRD, ICP-MS, N2 Physisorption, and H2 …
abstract: The goal of this study was to develop a high performance catalyst for the water gas shift reaction of reformate gas obtained from the dry reforming of biogas methane, in order to produce bio-renewable hydrogen suitable for feed to a fuel cell. Accordingly, three phases of the study were executed involving the identification and optimization of the catalyst, application in a membrane reactor and kinetic studies of the water gas shift reaction. A portfolio of ternary oxide catalysts with a nominal composition of 3Ni5Cu/CeZrM (where M = La, Mg, Y, Gd, Ca) were developed and prepared by surfactant assisted route. A binary oxide catalyst was also prepared to serve as a benchmark for comparing the effect of incorporating a promoter element. The catalysts were screened for the water gas shift reaction at 500oC at atmospheric pressure in a packed bed tubular reactor using 30% CO/balance N2 gas and the catalyst with Ca promoter element showed the best performance. This catalyst was further tested using reformate gas comprising of 46.2%CO, 8.5% CH4, 7.2% CO2 and 38.1 % H2 to simulate a realistic product stream from a biogas dry reformer. Again, the Ca catalyst fared well even under such conditions without any deactivation, making it a potential candidate for possible commercialization. To optimize the catalyst preparation method, the method of impregnation was varied using atmospheric pressure or vacuum conditions; the amount of surfactant used and calcination temperature were also varied. Subsequently, the operating conditions were also varied including reaction temperature, steam/CO ratio and reactor pressure. An extended TOS stability test was performed for 12 hours to evaluate the continuous performance of the catalyst over extended time duration. Several characterization techniques were also employed to investigate the correlation between the catalyst structure and the performance exhibited. The techniques employed include TPR, TPO, XRD, ICP-MS, N2 Physisorption, and H2 …
author: Oluku, Ishioma Judith
language: en
date published: 2013-12
date modified: 2026-07-24T04:03:38Z
provider: University of Regina
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Faculty of Graduate Studies and Research, University of Regina

PropertyValue
property ID: Handle
value: https://hdl.handle.net/10294/5431

PropertyValue
property ID: DOI
value: 10.82465/4392