elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Solar Thermochemical Generation of Hydrogen: Development of a Receiver Reactor for the Decomposition of Sulfuric Acid

Noglik, Adam and Roeb, Martin and Rzepczyk, Thomas and Hinkley, Jim and Sattler, Christian and Pitz-Paal, Robert (2009) Solar Thermochemical Generation of Hydrogen: Development of a Receiver Reactor for the Decomposition of Sulfuric Acid. Journal of Solar Energy Engineering, 131. American Society of Mechanical Engineers (ASME). DOI: 10.1115/1.3027505

[img] PDF - Registered users only
723kB

Abstract

A critical step of sulfur based thermochemical cycles for hydrogen production from water is the endothermic recomposition of sulfuric acid. The necessary heat can be provided by concentrated solar radiation. A solar receiver-reactor has been developed and built to investigate this process. Experiments with the test reactor were carried out in the DLR solar furnace in Cologne and confirmed the technical feasibility of a receiver-reactor containing porous ceramics for the decomposition of sulfuric acid. The receiver-reactor and strategy of operation were iteratively optimized with respect to chemical conversion and reactor efficiency. Parametric studies were conducted with varying partial pressure of SO3, residence time, absorber temperature, the presence of catalyst, and the performance of different catalysts to quantify their influence on chemical conversion and reactor efficiency. The absorber temperature distribution was found to be the most crucial process parameter. Conversions close to the equilibrium�in some cases exceeding 90%�were achieved with a platinum catalyst. Thermal efficiencies of up to 35% for the foam vaporizer and 30% for the overall reactor were achieved. Enclosing the absorber in a cavity and using separate chambers for the evaporation and the SO3-decomposition were identified as potential measures to improve the reactor.

Item URL in elib:https://elib.dlr.de/63293/
Document Type:Article
Title:Solar Thermochemical Generation of Hydrogen: Development of a Receiver Reactor for the Decomposition of Sulfuric Acid
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Noglik, AdamUHDEUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Rzepczyk, ThomasMAN FerrostaalUNSPECIFIED
Hinkley, JimCSIROUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Pitz-Paal, Robertrobert.pitz-paal (at) dlr.deUNSPECIFIED
Date:2009
Journal or Publication Title:Journal of Solar Energy Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:131
DOI :10.1115/1.3027505
Publisher:American Society of Mechanical Engineers (ASME)
Status:Published
Keywords:hydrogen, solar thermal, thermochemical cycles, sulfuric acid
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Stoffumwandlung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Engineering Thermodynamics > Solar Research
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:19 Feb 2010 14:21
Last Modified:08 Mar 2018 18:45

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.