Kinetic study for burning regeneration of coked MFI-type zeolite and numerical modeling for regeneration process in a fixed-bed reactor
Kinetic analysis of burning regeneration of coked MFI-type zeolite obtained by catalytic cracking of n-hexane was studied using a multiple-reaction model. Hydrogen contained in the coke was oxidized faster than carbon, and subsequently carbon remaining after the hydrogen combustion was gradually oxi...
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| Veröffentlicht in: | Chemical engineering journal (1996) 2012-10, Vol.207, p.368-376 |
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| container_end_page | 376 |
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| container_start_page | 368 |
| container_title | Chemical engineering journal (1996) |
| container_volume | 207 |
| creator | Nakasaka, Yuta Tago, Teruoki Konno, Hiroki Okabe, Akihiro Masuda, Takao |
| description | Kinetic analysis of burning regeneration of coked MFI-type zeolite obtained by catalytic cracking of n-hexane was studied using a multiple-reaction model. Hydrogen contained in the coke was oxidized faster than carbon, and subsequently carbon remaining after the hydrogen combustion was gradually oxidized. Reaction rates of carbon and hydrogen correlated with the Arrhenius equation; and activation energies for the combustion of carbon and hydrogen were 156kJ/mol and 140kJ/mol, respectively, regardless of the coke loading. Regeneration of coked MFI-type zeolite in the fixed-bed reactor was simulated numerically using reaction rates obtained from the kinetic analysis. The numerical result for changes in gas composition with time at the reactor outlet agreed well with the experimental results. Axial distribution of the temperature and concentration of water vapor in the catalyst bed was obtained numerically and results showed that the temperature and water vapor near the outlet were higher than other location in the reactor. |
| doi_str_mv | 10.1016/j.cej.2012.06.138 |
| format | Article |
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Hydrogen contained in the coke was oxidized faster than carbon, and subsequently carbon remaining after the hydrogen combustion was gradually oxidized. Reaction rates of carbon and hydrogen correlated with the Arrhenius equation; and activation energies for the combustion of carbon and hydrogen were 156kJ/mol and 140kJ/mol, respectively, regardless of the coke loading. Regeneration of coked MFI-type zeolite in the fixed-bed reactor was simulated numerically using reaction rates obtained from the kinetic analysis. The numerical result for changes in gas composition with time at the reactor outlet agreed well with the experimental results. Axial distribution of the temperature and concentration of water vapor in the catalyst bed was obtained numerically and results showed that the temperature and water vapor near the outlet were higher than other location in the reactor.</description><identifier>ISSN: 1385-8947</identifier><identifier>EISSN: 1873-3212</identifier><identifier>DOI: 10.1016/j.cej.2012.06.138</identifier><language>eng</language><publisher>Oxford: Elsevier B.V</publisher><subject>Applied sciences ; burning ; Carbon ; Catalysis ; catalytic cracking ; Catalytic reactions ; Chemical engineering ; Chemistry ; Combustion ; equations ; Exact sciences and technology ; General and physical chemistry ; hydrogen ; Mathematical models ; Reaction kinetics ; Reactors ; Regeneration ; Theory of reactions, general kinetics. Catalysis. 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Hydrogen contained in the coke was oxidized faster than carbon, and subsequently carbon remaining after the hydrogen combustion was gradually oxidized. Reaction rates of carbon and hydrogen correlated with the Arrhenius equation; and activation energies for the combustion of carbon and hydrogen were 156kJ/mol and 140kJ/mol, respectively, regardless of the coke loading. Regeneration of coked MFI-type zeolite in the fixed-bed reactor was simulated numerically using reaction rates obtained from the kinetic analysis. The numerical result for changes in gas composition with time at the reactor outlet agreed well with the experimental results. Axial distribution of the temperature and concentration of water vapor in the catalyst bed was obtained numerically and results showed that the temperature and water vapor near the outlet were higher than other location in the reactor.</description><subject>Applied sciences</subject><subject>burning</subject><subject>Carbon</subject><subject>Catalysis</subject><subject>catalytic cracking</subject><subject>Catalytic reactions</subject><subject>Chemical engineering</subject><subject>Chemistry</subject><subject>Combustion</subject><subject>equations</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>hydrogen</subject><subject>Mathematical models</subject><subject>Reaction kinetics</subject><subject>Reactors</subject><subject>Regeneration</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>water temperature</subject><subject>Water vapor</subject><subject>Zeolites</subject><issn>1385-8947</issn><issn>1873-3212</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNpVkcFq3DAQhk1poWmaB8gpuhR6sSNZli0dS2iakIQe2pyFPBot2nilrWRDti_Q147MhkJOM4f__xi-qapzRhtGWX-5bQC3TUtZ29C-YVy-q06YHHjNW9a-LzuXopaqGz5Wn3LeUkp7xdRJ9e_OB5w9kDwv9kBcTGRcUvBhQxJuMGAys4-BREcgPqElD9e39XzYI_mLcfIzEhMsCcsOkwczkV20OK3tlfSGsE8RMGfiAzHE-We09Vh4CQ3MMX2uPjgzZTx7nafV4_X331c39f3PH7dX3-5r4ErONQjWQadwtGJwQkgn-CDawaBVo0RhjOqMhXGUMDoGTlredtJ1DgeA1gLnp9XXI7ec82fBPOudz4DTZALGJWvWD0zInquuRNkxCinmnNDpffI7kw6aUb1K11tdpOtVuqa9LopL58sr3uSiwyUTwOf_xbYXknK1nnFxzDkTtdmkknn8VUCiPEaJXij-AsHNj9s</recordid><startdate>20121001</startdate><enddate>20121001</enddate><creator>Nakasaka, Yuta</creator><creator>Tago, Teruoki</creator><creator>Konno, Hiroki</creator><creator>Okabe, Akihiro</creator><creator>Masuda, Takao</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20121001</creationdate><title>Kinetic study for burning regeneration of coked MFI-type zeolite and numerical modeling for regeneration process in a fixed-bed reactor</title><author>Nakasaka, Yuta ; Tago, Teruoki ; Konno, Hiroki ; Okabe, Akihiro ; Masuda, Takao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c398t-c514c49ebd57f558f537527aed9b8e5aa94adcbb8cbf1cf8d3248f4fe7cc2dc33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Applied sciences</topic><topic>burning</topic><topic>Carbon</topic><topic>Catalysis</topic><topic>catalytic cracking</topic><topic>Catalytic reactions</topic><topic>Chemical engineering</topic><topic>Chemistry</topic><topic>Combustion</topic><topic>equations</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>hydrogen</topic><topic>Mathematical models</topic><topic>Reaction kinetics</topic><topic>Reactors</topic><topic>Regeneration</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>water temperature</topic><topic>Water vapor</topic><topic>Zeolites</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nakasaka, Yuta</creatorcontrib><creatorcontrib>Tago, Teruoki</creatorcontrib><creatorcontrib>Konno, Hiroki</creatorcontrib><creatorcontrib>Okabe, Akihiro</creatorcontrib><creatorcontrib>Masuda, Takao</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Chemical engineering journal (1996)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nakasaka, Yuta</au><au>Tago, Teruoki</au><au>Konno, Hiroki</au><au>Okabe, Akihiro</au><au>Masuda, Takao</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Kinetic study for burning regeneration of coked MFI-type zeolite and numerical modeling for regeneration process in a fixed-bed reactor</atitle><jtitle>Chemical engineering journal (1996)</jtitle><date>2012-10-01</date><risdate>2012</risdate><volume>207</volume><spage>368</spage><epage>376</epage><pages>368-376</pages><issn>1385-8947</issn><eissn>1873-3212</eissn><abstract>Kinetic analysis of burning regeneration of coked MFI-type zeolite obtained by catalytic cracking of n-hexane was studied using a multiple-reaction model. Hydrogen contained in the coke was oxidized faster than carbon, and subsequently carbon remaining after the hydrogen combustion was gradually oxidized. Reaction rates of carbon and hydrogen correlated with the Arrhenius equation; and activation energies for the combustion of carbon and hydrogen were 156kJ/mol and 140kJ/mol, respectively, regardless of the coke loading. Regeneration of coked MFI-type zeolite in the fixed-bed reactor was simulated numerically using reaction rates obtained from the kinetic analysis. The numerical result for changes in gas composition with time at the reactor outlet agreed well with the experimental results. Axial distribution of the temperature and concentration of water vapor in the catalyst bed was obtained numerically and results showed that the temperature and water vapor near the outlet were higher than other location in the reactor.</abstract><cop>Oxford</cop><pub>Elsevier B.V</pub><doi>10.1016/j.cej.2012.06.138</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 1385-8947 |
| ispartof | Chemical engineering journal (1996), 2012-10, Vol.207, p.368-376 |
| issn | 1385-8947 1873-3212 |
| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Applied sciences burning Carbon Catalysis catalytic cracking Catalytic reactions Chemical engineering Chemistry Combustion equations Exact sciences and technology General and physical chemistry hydrogen Mathematical models Reaction kinetics Reactors Regeneration Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry water temperature Water vapor Zeolites |
| title | Kinetic study for burning regeneration of coked MFI-type zeolite and numerical modeling for regeneration process in a fixed-bed reactor |
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