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Catalytic heat exchangers for small-scale production of hydrogen - feasibility study

Abstract

A feasibility study concerning heat-exchanger reactors in small-scale production of hydrogen has been performed on the request of Svenskt Gastekniskt Center AB and SWEP International AB. The basic idea is to implement different catalysts into brazed plate-type heat exchangers. This can be achieved by installing catalytic cylinders in the inlet-and outlet ports of the heat exchangers or through treatment of the plates to render them catalytically active. It is also possible to sandwich catalytically active wire meshes between the plates. Experiments concerning steam reforming of methanol and methane have been performed in a micro-reactor to gather kinetic data for modelling purposes. Performance calculations concerning heat exchanger reactors have then been conducted with Catator's generic simulation code for catalytic reactors (CatalystExplorer). The simulations clearly demonstrate the technical performance of these reactors. Indeed, the production rate of hydrogen is expected to be about 10 nm{sup 3}/h per litre of heat exchanger. The corresponding value for a conventional steam-reforming unit is about 1 nm{sup 3}/h or less per litre of reactor volume. Also, the compactness and the high degree of integration together with the possibilities of mass production will give an attractive cost for such units. Depending on the demands concerning the purity  More>>
Authors:
Silversand, F [1] 
  1. Catator AB, Lund (Sweden)
Publication Date:
Feb 01, 2002
Product Type:
Technical Report
Report Number:
SGC-R-129
Resource Relation:
Other Information: 14 refs, 24 figs; PBD: Feb 2002
Subject:
03 NATURAL GAS; HYDROGEN GENERATORS; HYDROGEN PRODUCTION; HEAT EXCHANGERS; CATALYSIS; EFFICIENCY; COST
OSTI ID:
20235573
Research Organizations:
Svenskt gastekniskt center, Malmoe (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Other: ISSN 1102-7371; TRN: SE0207091
Availability:
Available from: http://www.sgc.se/rapporter/resources/sgc129.pdf; Available to ETDE participating countries only(see www.etde.org); commercial reproduction prohibited; OSTI as DE20235573
Submitting Site:
SWD
Size:
44 pages
Announcement Date:
Apr 17, 2002

Citation Formats

Silversand, F. Catalytic heat exchangers for small-scale production of hydrogen - feasibility study. Sweden: N. p., 2002. Web.
Silversand, F. Catalytic heat exchangers for small-scale production of hydrogen - feasibility study. Sweden.
Silversand, F. 2002. "Catalytic heat exchangers for small-scale production of hydrogen - feasibility study." Sweden.
@misc{etde_20235573,
title = {Catalytic heat exchangers for small-scale production of hydrogen - feasibility study}
author = {Silversand, F}
abstractNote = {A feasibility study concerning heat-exchanger reactors in small-scale production of hydrogen has been performed on the request of Svenskt Gastekniskt Center AB and SWEP International AB. The basic idea is to implement different catalysts into brazed plate-type heat exchangers. This can be achieved by installing catalytic cylinders in the inlet-and outlet ports of the heat exchangers or through treatment of the plates to render them catalytically active. It is also possible to sandwich catalytically active wire meshes between the plates. Experiments concerning steam reforming of methanol and methane have been performed in a micro-reactor to gather kinetic data for modelling purposes. Performance calculations concerning heat exchanger reactors have then been conducted with Catator's generic simulation code for catalytic reactors (CatalystExplorer). The simulations clearly demonstrate the technical performance of these reactors. Indeed, the production rate of hydrogen is expected to be about 10 nm{sup 3}/h per litre of heat exchanger. The corresponding value for a conventional steam-reforming unit is about 1 nm{sup 3}/h or less per litre of reactor volume. Also, the compactness and the high degree of integration together with the possibilities of mass production will give an attractive cost for such units. Depending on the demands concerning the purity of the hydrogen it is possible to add secondary catalytic steps like water-gas shifters, methanation and selective oxidation, into a one-train unit, i.e. to design an all-inclusive design. Such reactors can be used for the supply of hydrogen to fuel cells. The production cost for hydrogen can be cut by 60 - 70% through the utilisation of heat exchanger reactors instead of conventional electrolysis. This result is primarily a result of the high price for electricity compared to the feed stock prices in steam reforming. It is important to verify the performance calculations and the simulation results through experimental investigations. The continued work should focus on three major areas according to: Verification and conceptual tests with methanol reforming; Conceptual tests with reforming of natural gas and naphtha; Development and design of a totally integrated reformer unit, i.e. the 'all-inclusive reformer'.}
place = {Sweden}
year = {2002}
month = {Feb}
}