CO 2 coverage on Pd catalysts accelerates oxygen removal in oxy-combustion systems
Oxy-combustion systems result in enriched CO in exhaust gases; however, the utilization of the concentrated CO stream from oxy-combustion is limited by remnant O . CH oxidation using Pd catalysts has been found to have high O -removal efficiency. Here, the effect of excess CO in the feed stream on O...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2023-02, Vol.25 (8), p.6527-6536 |
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| container_title | Physical chemistry chemical physics : PCCP |
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| creator | Jung, Sungyoon Cao, Tengfei Mishra, Rohan Biswas, Pratim |
| description | Oxy-combustion systems result in enriched CO
in exhaust gases; however, the utilization of the concentrated CO
stream from oxy-combustion is limited by remnant O
. CH
oxidation using Pd catalysts has been found to have high O
-removal efficiency. Here, the effect of excess CO
in the feed stream on O
removal with CH
oxidation is investigated by combining experimental and theoretical approaches. Experimental results reveal complete CH
oxidation without any side-products, and a monotonic increase in the rate of CO
generation with an increase in CO
concentration in the feed stream. Density-functional theory calculations show that high surface coverage of CO
on Pd leads to a reduction in the activation energy for the initial dissociation of CH
into CH
and H, and also the subsequent oxidation reactions. A CO
-rich environment in oxy-combustion systems is therefore beneficial for the reduction of oxygen in exhaust gases. |
| doi_str_mv | 10.1039/D2CP04788H |
| format | Article |
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in exhaust gases; however, the utilization of the concentrated CO
stream from oxy-combustion is limited by remnant O
. CH
oxidation using Pd catalysts has been found to have high O
-removal efficiency. Here, the effect of excess CO
in the feed stream on O
removal with CH
oxidation is investigated by combining experimental and theoretical approaches. Experimental results reveal complete CH
oxidation without any side-products, and a monotonic increase in the rate of CO
generation with an increase in CO
concentration in the feed stream. Density-functional theory calculations show that high surface coverage of CO
on Pd leads to a reduction in the activation energy for the initial dissociation of CH
into CH
and H, and also the subsequent oxidation reactions. A CO
-rich environment in oxy-combustion systems is therefore beneficial for the reduction of oxygen in exhaust gases.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/D2CP04788H</identifier><identifier>PMID: 36786417</identifier><language>eng</language><publisher>England: Royal Society of Chemistry (RSC)</publisher><ispartof>Physical chemistry chemical physics : PCCP, 2023-02, Vol.25 (8), p.6527-6536</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c857-e041fb89892123db690907ab815d2db8900fc9e2db21085e1749863f6dbd013</cites><orcidid>0000-0003-1261-0087 ; 0000-0003-1104-3738 ; 0000000312610087 ; 0000000311043738</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,315,781,785,886,27929,27930</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/36786417$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/1924595$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Jung, Sungyoon</creatorcontrib><creatorcontrib>Cao, Tengfei</creatorcontrib><creatorcontrib>Mishra, Rohan</creatorcontrib><creatorcontrib>Biswas, Pratim</creatorcontrib><title>CO 2 coverage on Pd catalysts accelerates oxygen removal in oxy-combustion systems</title><title>Physical chemistry chemical physics : PCCP</title><addtitle>Phys Chem Chem Phys</addtitle><description>Oxy-combustion systems result in enriched CO
in exhaust gases; however, the utilization of the concentrated CO
stream from oxy-combustion is limited by remnant O
. CH
oxidation using Pd catalysts has been found to have high O
-removal efficiency. Here, the effect of excess CO
in the feed stream on O
removal with CH
oxidation is investigated by combining experimental and theoretical approaches. Experimental results reveal complete CH
oxidation without any side-products, and a monotonic increase in the rate of CO
generation with an increase in CO
concentration in the feed stream. Density-functional theory calculations show that high surface coverage of CO
on Pd leads to a reduction in the activation energy for the initial dissociation of CH
into CH
and H, and also the subsequent oxidation reactions. A CO
-rich environment in oxy-combustion systems is therefore beneficial for the reduction of oxygen in exhaust gases.</description><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNpFkF1LwzAUhoMobk5v_AESvBSq-WqaXEqnThhsDO9LmpzOStuMphvu35sxnVfn5bzP-eBF6JaSR0q4fpqyfElEptTsDI2pkDzRRInzk87kCF2F8EUIoSnll2jEZaakoNkYrfIFZtj6HfRmDdh3eOmwNYNp9mEI2FgLTbQGCNh_79fQ4R5avzMNrrtDJ7G-LbdhqONkiCPQhmt0UZkmwM1vnaDV68tHPkvmi7f3_HmeWJVmCRBBq1JppRll3JVSk_ipKRVNHXPRIKSyGqJklKgUaCa0krySrnSE8gm6Py718XYRbD2A_bS-68AOBdVMpDqN0MMRsr0PoYeq2PR1a_p9QUlxiK74jy7Cd0d4sy1bcCf0Lyv-A9WvaEM</recordid><startdate>20230222</startdate><enddate>20230222</enddate><creator>Jung, Sungyoon</creator><creator>Cao, Tengfei</creator><creator>Mishra, Rohan</creator><creator>Biswas, Pratim</creator><general>Royal Society of Chemistry (RSC)</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0003-1261-0087</orcidid><orcidid>https://orcid.org/0000-0003-1104-3738</orcidid><orcidid>https://orcid.org/0000000312610087</orcidid><orcidid>https://orcid.org/0000000311043738</orcidid></search><sort><creationdate>20230222</creationdate><title>CO 2 coverage on Pd catalysts accelerates oxygen removal in oxy-combustion systems</title><author>Jung, Sungyoon ; Cao, Tengfei ; Mishra, Rohan ; Biswas, Pratim</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c857-e041fb89892123db690907ab815d2db8900fc9e2db21085e1749863f6dbd013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jung, Sungyoon</creatorcontrib><creatorcontrib>Cao, Tengfei</creatorcontrib><creatorcontrib>Mishra, Rohan</creatorcontrib><creatorcontrib>Biswas, Pratim</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jung, Sungyoon</au><au>Cao, Tengfei</au><au>Mishra, Rohan</au><au>Biswas, Pratim</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>CO 2 coverage on Pd catalysts accelerates oxygen removal in oxy-combustion systems</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><addtitle>Phys Chem Chem Phys</addtitle><date>2023-02-22</date><risdate>2023</risdate><volume>25</volume><issue>8</issue><spage>6527</spage><epage>6536</epage><pages>6527-6536</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>Oxy-combustion systems result in enriched CO
in exhaust gases; however, the utilization of the concentrated CO
stream from oxy-combustion is limited by remnant O
. CH
oxidation using Pd catalysts has been found to have high O
-removal efficiency. Here, the effect of excess CO
in the feed stream on O
removal with CH
oxidation is investigated by combining experimental and theoretical approaches. Experimental results reveal complete CH
oxidation without any side-products, and a monotonic increase in the rate of CO
generation with an increase in CO
concentration in the feed stream. Density-functional theory calculations show that high surface coverage of CO
on Pd leads to a reduction in the activation energy for the initial dissociation of CH
into CH
and H, and also the subsequent oxidation reactions. A CO
-rich environment in oxy-combustion systems is therefore beneficial for the reduction of oxygen in exhaust gases.</abstract><cop>England</cop><pub>Royal Society of Chemistry (RSC)</pub><pmid>36786417</pmid><doi>10.1039/D2CP04788H</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-1261-0087</orcidid><orcidid>https://orcid.org/0000-0003-1104-3738</orcidid><orcidid>https://orcid.org/0000000312610087</orcidid><orcidid>https://orcid.org/0000000311043738</orcidid></addata></record> |
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| ispartof | Physical chemistry chemical physics : PCCP, 2023-02, Vol.25 (8), p.6527-6536 |
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| language | eng |
| recordid | cdi_osti_scitechconnect_1924595 |
| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| title | CO 2 coverage on Pd catalysts accelerates oxygen removal in oxy-combustion systems |
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