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Theoretical study of the ethanol steam reforming in a parallel channel reactor
The ethanol steam reforming (ESR) is studied in a parallel plate reactor with square channels of 500–2000 μm and washcoated with Pd-based catalyst. The endothermic process is co- or countercurrently heated by means of a flue gas stream flowing through contiguous channels. Two contiguous square chann...
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Published in: | International journal of hydrogen energy 2012-10, Vol.37 (19), p.14887-14894 |
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container_end_page | 14894 |
container_issue | 19 |
container_start_page | 14887 |
container_title | International journal of hydrogen energy |
container_volume | 37 |
creator | Bruschi, Yanina M. López, Eduardo Schbib, Noemí S. Pedernera, Marisa N. Borio, Daniel O. |
description | The ethanol steam reforming (ESR) is studied in a parallel plate reactor with square channels of 500–2000 μm and washcoated with Pd-based catalyst. The endothermic process is co- or countercurrently heated by means of a flue gas stream flowing through contiguous channels. Two contiguous square channels, assumed as representative of the whole reactor behavior, are simulated using both 1D pseudohomogeneous and heterogeneous models for comparison purposes. The influence of the main operating variables, flow configuration and design parameters on the performance of the reformer has been analyzed.
The reactor performance is mainly controlled by the heat supply from the flue gas to the process stream. For low inlet temperatures of the ethanol + water feed, the countercurrent flow configuration allows improved heat recuperation and the reactor shows a higher performance. Conversely, when the feed is pre-heated upstream the reactor, the cocurrent scheme appears preferable due to a more favorable axial profile of heat transferred. The channel width has a strong influence on the hydrogen production rate and the residual methane slips when cocurrent operation is selected. For the countercurrent scheme, a more robust design is achieved in terms of ethanol conversion and hydrogen yield for variations in the feed temperature. Moreover, the channel dimension losses influence provided enough small channels are considered. The heat conduction phenomenon through the solid metal wall was studied varying the wall thickness; diminished reactor performance for thicker walls was observed due to a drop in the heat duty. |
doi_str_mv | 10.1016/j.ijhydene.2012.01.175 |
format | article |
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The reactor performance is mainly controlled by the heat supply from the flue gas to the process stream. For low inlet temperatures of the ethanol + water feed, the countercurrent flow configuration allows improved heat recuperation and the reactor shows a higher performance. Conversely, when the feed is pre-heated upstream the reactor, the cocurrent scheme appears preferable due to a more favorable axial profile of heat transferred. The channel width has a strong influence on the hydrogen production rate and the residual methane slips when cocurrent operation is selected. For the countercurrent scheme, a more robust design is achieved in terms of ethanol conversion and hydrogen yield for variations in the feed temperature. Moreover, the channel dimension losses influence provided enough small channels are considered. The heat conduction phenomenon through the solid metal wall was studied varying the wall thickness; diminished reactor performance for thicker walls was observed due to a drop in the heat duty.</description><identifier>ISSN: 0360-3199</identifier><identifier>EISSN: 1879-3487</identifier><identifier>DOI: 10.1016/j.ijhydene.2012.01.175</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Channels ; Ethanol ; Ethanol steam reforming ; Ethyl alcohol ; Flues ; Heat transfer ; Hydrogen production ; Mathematical models ; Pd catalyst ; Reactors ; Reforming ; Square channel ; Walls</subject><ispartof>International journal of hydrogen energy, 2012-10, Vol.37 (19), p.14887-14894</ispartof><rights>2012 Hydrogen Energy Publications, LLC.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c463t-fa2410a4271e6ec7cd94ce273f8e58398eb2be41a223d6557138db9beeaf8ca23</citedby><cites>FETCH-LOGICAL-c463t-fa2410a4271e6ec7cd94ce273f8e58398eb2be41a223d6557138db9beeaf8ca23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids></links><search><creatorcontrib>Bruschi, Yanina M.</creatorcontrib><creatorcontrib>López, Eduardo</creatorcontrib><creatorcontrib>Schbib, Noemí S.</creatorcontrib><creatorcontrib>Pedernera, Marisa N.</creatorcontrib><creatorcontrib>Borio, Daniel O.</creatorcontrib><title>Theoretical study of the ethanol steam reforming in a parallel channel reactor</title><title>International journal of hydrogen energy</title><description>The ethanol steam reforming (ESR) is studied in a parallel plate reactor with square channels of 500–2000 μm and washcoated with Pd-based catalyst. The endothermic process is co- or countercurrently heated by means of a flue gas stream flowing through contiguous channels. Two contiguous square channels, assumed as representative of the whole reactor behavior, are simulated using both 1D pseudohomogeneous and heterogeneous models for comparison purposes. The influence of the main operating variables, flow configuration and design parameters on the performance of the reformer has been analyzed.
The reactor performance is mainly controlled by the heat supply from the flue gas to the process stream. For low inlet temperatures of the ethanol + water feed, the countercurrent flow configuration allows improved heat recuperation and the reactor shows a higher performance. Conversely, when the feed is pre-heated upstream the reactor, the cocurrent scheme appears preferable due to a more favorable axial profile of heat transferred. The channel width has a strong influence on the hydrogen production rate and the residual methane slips when cocurrent operation is selected. For the countercurrent scheme, a more robust design is achieved in terms of ethanol conversion and hydrogen yield for variations in the feed temperature. Moreover, the channel dimension losses influence provided enough small channels are considered. The heat conduction phenomenon through the solid metal wall was studied varying the wall thickness; diminished reactor performance for thicker walls was observed due to a drop in the heat duty.</description><subject>Channels</subject><subject>Ethanol</subject><subject>Ethanol steam reforming</subject><subject>Ethyl alcohol</subject><subject>Flues</subject><subject>Heat transfer</subject><subject>Hydrogen production</subject><subject>Mathematical models</subject><subject>Pd catalyst</subject><subject>Reactors</subject><subject>Reforming</subject><subject>Square channel</subject><subject>Walls</subject><issn>0360-3199</issn><issn>1879-3487</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkM1OwzAQhC0EEqXwCshHLgle24njG6jiT6rgUs6W62yIozQudorUtydV4dzTSKtvZzRDyC2wHBiU913uu3Zf44A5Z8BzBjmo4ozMoFI6E7JS52TGRMkyAVpfkquUOsZAMaln5H3VYog4emd7msZdvaehoWOLFMfWDuFwRLuhEZsQN374on6glm5ttH2PPXUTNEwa0boxxGty0dg-4c2fzsnn89Nq8ZotP17eFo_LzMlSjFljuQRmJVeAJTrlai0dciWaCotK6ArXfI0SLOeiLotCgajqtV4j2qZylos5uTv6bmP43mEazcYnh31vBwy7ZKZ2WimpoTiNgigLWWmmJrQ8oi6GlKbKZhv9xsa9AWYOW5vO_G9tDlsbBlPUIePh-IhT5x-P0STncXBY-4huNHXwpyx-AczVi9I</recordid><startdate>20121001</startdate><enddate>20121001</enddate><creator>Bruschi, Yanina M.</creator><creator>López, Eduardo</creator><creator>Schbib, Noemí S.</creator><creator>Pedernera, Marisa N.</creator><creator>Borio, Daniel O.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20121001</creationdate><title>Theoretical study of the ethanol steam reforming in a parallel channel reactor</title><author>Bruschi, Yanina M. ; López, Eduardo ; Schbib, Noemí S. ; Pedernera, Marisa N. ; Borio, Daniel O.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c463t-fa2410a4271e6ec7cd94ce273f8e58398eb2be41a223d6557138db9beeaf8ca23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Channels</topic><topic>Ethanol</topic><topic>Ethanol steam reforming</topic><topic>Ethyl alcohol</topic><topic>Flues</topic><topic>Heat transfer</topic><topic>Hydrogen production</topic><topic>Mathematical models</topic><topic>Pd catalyst</topic><topic>Reactors</topic><topic>Reforming</topic><topic>Square channel</topic><topic>Walls</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bruschi, Yanina M.</creatorcontrib><creatorcontrib>López, Eduardo</creatorcontrib><creatorcontrib>Schbib, Noemí S.</creatorcontrib><creatorcontrib>Pedernera, Marisa N.</creatorcontrib><creatorcontrib>Borio, Daniel O.</creatorcontrib><collection>CrossRef</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>International journal of hydrogen energy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bruschi, Yanina M.</au><au>López, Eduardo</au><au>Schbib, Noemí S.</au><au>Pedernera, Marisa N.</au><au>Borio, Daniel O.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Theoretical study of the ethanol steam reforming in a parallel channel reactor</atitle><jtitle>International journal of hydrogen energy</jtitle><date>2012-10-01</date><risdate>2012</risdate><volume>37</volume><issue>19</issue><spage>14887</spage><epage>14894</epage><pages>14887-14894</pages><issn>0360-3199</issn><eissn>1879-3487</eissn><abstract>The ethanol steam reforming (ESR) is studied in a parallel plate reactor with square channels of 500–2000 μm and washcoated with Pd-based catalyst. The endothermic process is co- or countercurrently heated by means of a flue gas stream flowing through contiguous channels. Two contiguous square channels, assumed as representative of the whole reactor behavior, are simulated using both 1D pseudohomogeneous and heterogeneous models for comparison purposes. The influence of the main operating variables, flow configuration and design parameters on the performance of the reformer has been analyzed.
The reactor performance is mainly controlled by the heat supply from the flue gas to the process stream. For low inlet temperatures of the ethanol + water feed, the countercurrent flow configuration allows improved heat recuperation and the reactor shows a higher performance. Conversely, when the feed is pre-heated upstream the reactor, the cocurrent scheme appears preferable due to a more favorable axial profile of heat transferred. The channel width has a strong influence on the hydrogen production rate and the residual methane slips when cocurrent operation is selected. For the countercurrent scheme, a more robust design is achieved in terms of ethanol conversion and hydrogen yield for variations in the feed temperature. Moreover, the channel dimension losses influence provided enough small channels are considered. The heat conduction phenomenon through the solid metal wall was studied varying the wall thickness; diminished reactor performance for thicker walls was observed due to a drop in the heat duty.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.ijhydene.2012.01.175</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Channels Ethanol Ethanol steam reforming Ethyl alcohol Flues Heat transfer Hydrogen production Mathematical models Pd catalyst Reactors Reforming Square channel Walls |
title | Theoretical study of the ethanol steam reforming in a parallel channel reactor |
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