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Steam reforming of tars at low temperature and elevated pressure for model tar component naphthalene

Speidel, Michael and Fischer, Holger (2016) Steam reforming of tars at low temperature and elevated pressure for model tar component naphthalene. International Journal of Hydrogen Energy, 41 (30), pp. 12920-12928. Elsevier. DOI: doi:10.1016/j.ijhydene.2016.05.023 ISSN 0360-3199

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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2016.05.023

Abstract

A process of pressurized gasification and power generation in a hybrid system of Solid Oxide Fuel Cell (SOFC) and gas turbine enables an efficient use of biomass. This process requires tar reforming in order to protect the SOFC from plugging. Tars must be converted at 5 bar absolute pressure (bara) while avoiding secondary steam reforming of methane in order to reduce the required heat input for the tar reformer. This can be realized at low reforming temperatures (<700 _C) where methane conversion is reduced due to chemical equilibrium. A laboratory-scale test rig is introduced, which enables an investigation of the steam reforming of the model tar component naphthalene at up to 5 bara. Deactivation of the nickel catalyst caused by coke formation was detected. Despite the reduced amount of free active centers on the catalyst surface, stationary naphthalene conversions are possible at temperatures between 600 _C and 700 _C. The lower the temperature, the more active centers are covered. For stationary conditions a hyperbolic approach for the reaction rate of steam reforming of naphthalene is developed and parameters for 650 _C and 700 °C are determined.

Item URL in elib:https://elib.dlr.de/105290/
Document Type:Article
Title:Steam reforming of tars at low temperature and elevated pressure for model tar component naphthalene
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Speidel, MichaelMichael.Speidel (at) dlr.deUNSPECIFIED
Fischer, Holgerholger.fischer (at) dlr.dehttps://orcid.org/0000-0002-0808-0143
Date:10 August 2016
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:41
DOI :doi:10.1016/j.ijhydene.2016.05.023
Page Range:pp. 12920-12928
Publisher:Elsevier
ISSN:0360-3199
Status:Published
Keywords:Biomass, Pressurized gasification, SOFC, Tar reforming, Naphthalene, Coke Formation
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Synthetic Hydrocarbons
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemical Processes (Synth. HC.) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Fischer, Holger
Deposited On:20 Jul 2016 08:37
Last Modified:31 Jul 2019 20:02

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