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Comparison of Different Concepts for Solar Reforming of Natural Gas

Holzemer-Zerhusen, Philipp (2018) Comparison of Different Concepts for Solar Reforming of Natural Gas. Master's, DLR / RWTH Aachen University.

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Abstract

Solar redox reforming of methane is investigated and compared to heterogeneously catalyzed solar reforming. An analysis of potential redox materials based on material prices and thermodynamic calculations yields iron oxide and ceria as promising candidates for redox reforming. Steam and dry methane reforming were studied for both materials, by process simulations in Aspen Custom Modeler. Models for heterogeneously catalyzed steam and dry methane reforming were used as reference processes. In total, six models were developed and used for the simulations. The impact of heat recovery between the redox material in the oxidized and the reduced state is studied. With a solar-to-fuel efficiency of 49.7 % at an oxidation temperature of 823 K, a reduction temperature of 1190 K and a corresponding pressure of 30 atm, redox steam methane reforming with iron oxide is the only redox cycle that is competitive with the reference process, in terms of efficiency. Redox steam methane reforming with iron oxide and redox dry methane reforming with ceria can produce high purity H2 and CO, respectively. No carbon formation was observed at those points of operation that lead to high solar-to-fuel efficiencies

Item URL in elib:https://elib.dlr.de/121428/
Document Type:Thesis (Master's)
Title:Comparison of Different Concepts for Solar Reforming of Natural Gas
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Holzemer-Zerhusen, PhilippPhilipp.Holzemer-Zerhusen (at) dlr.deUNSPECIFIED
Date:7 May 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:98
Status:Published
Keywords:Reforming, redox cycle, hydrogen, carbon monoxide, synthesis gas, ceria, iron oxide, solar, chemical looping, natural gas
Institution:DLR / RWTH Aachen University
Department:Institute of Solar Research / Chair of Solar Technology
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Deposited By: Holzemer-Zerhusen, Philipp
Deposited On:23 Aug 2018 11:34
Last Modified:31 Oct 2018 11:21

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