Supercritical gasification for the treatment of o-cresol wastewater
The supercritical water gasification of phenolic wastewater without oxidant was performed to degrade pollutants and produce hydrogen-enriched gases. The simulated o-cresol wastewater was gasified at 440-650℃ and 27.6 MPa in a continuous Inconel 625 reactor with the residence time of 0.42-1.25 min. T...
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| Veröffentlicht in: | Journal of environmental sciences (China) 2006, Vol.18 (4), p.644-649 |
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| creator | Wei, Chao-hai Hu, Cheng-sheng Wu, Chao-fei Yan, Bo |
| description | The supercritical water gasification of phenolic wastewater without oxidant was performed to degrade pollutants and produce hydrogen-enriched gases. The simulated o-cresol wastewater was gasified at 440-650℃ and 27.6 MPa in a continuous Inconel 625 reactor with the residence time of 0.42-1.25 min. The influence of the reaction temperature, residence time, pressure, catalyst, oxidant and the pollutant concentration on the gasification efficiency was investigated. Higher temperature and longer residence time enhanced the o-cresol gasification. The TOC removal rate and hydrogen gasification rate were 90.6% and 194.6%, respectively, at the temperature of 650℃ and the residence time of 0.83 min. The product gas was mainly composed of H2, CO2, CFL and CO, among which the total molar percentage of H2 and CFL was higher than 50%. The gasification efficiency decreased with the pollutant concentration increasing. Both the catalyst and oxidant could accelerate the hydrocarbon gasification at a lower reaction temperature, in which the catalyst promoted H2 production and the oxidant enhanced CO2 generation. The intermediates of liquid effluents were analyzed and phenol was found to be the main composition. The results indicate that the supercritical gasification is a promising way for the treatment of hazardous organic wastewater. |
| doi_str_mv | 10.3321/j.issn:1001-0742.2006.04.005 |
| format | Article |
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The simulated o-cresol wastewater was gasified at 440-650℃ and 27.6 MPa in a continuous Inconel 625 reactor with the residence time of 0.42-1.25 min. The influence of the reaction temperature, residence time, pressure, catalyst, oxidant and the pollutant concentration on the gasification efficiency was investigated. Higher temperature and longer residence time enhanced the o-cresol gasification. The TOC removal rate and hydrogen gasification rate were 90.6% and 194.6%, respectively, at the temperature of 650℃ and the residence time of 0.83 min. The product gas was mainly composed of H2, CO2, CFL and CO, among which the total molar percentage of H2 and CFL was higher than 50%. The gasification efficiency decreased with the pollutant concentration increasing. Both the catalyst and oxidant could accelerate the hydrocarbon gasification at a lower reaction temperature, in which the catalyst promoted H2 production and the oxidant enhanced CO2 generation. The intermediates of liquid effluents were analyzed and phenol was found to be the main composition. The results indicate that the supercritical gasification is a promising way for the treatment of hazardous organic wastewater.</description><identifier>ISSN: 1001-0742</identifier><identifier>EISSN: 1878-7320</identifier><identifier>DOI: 10.3321/j.issn:1001-0742.2006.04.005</identifier><identifier>PMID: 17078539</identifier><language>eng</language><publisher>Netherlands: College of Environmental Science and Technology, South China University of Technology, Guangzhou 510640, China</publisher><subject>Bioelectric Energy Sources ; Carbon Dioxide - analysis ; Carbon Dioxide - chemistry ; Catalysis ; Cresols - chemistry ; Hydrogen - analysis ; Hydrogen - chemistry ; Oxidants - chemistry ; Oxidation-Reduction ; Oxygen - analysis ; Oxygen - chemistry ; Pressure ; Temperature ; Time Factors ; Waste Disposal, Fluid - methods ; Water - chemistry ; 废水处理 ; 气化工艺 ; 超临界水</subject><ispartof>Journal of environmental sciences (China), 2006, Vol.18 (4), p.644-649</ispartof><rights>Copyright © Wanfang Data Co. 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All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85265X/85265X.jpg</thumbnail><link.rule.ids>314,776,780,4010,27900,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17078539$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Wei, Chao-hai</creatorcontrib><creatorcontrib>Hu, Cheng-sheng</creatorcontrib><creatorcontrib>Wu, Chao-fei</creatorcontrib><creatorcontrib>Yan, Bo</creatorcontrib><title>Supercritical gasification for the treatment of o-cresol wastewater</title><title>Journal of environmental sciences (China)</title><addtitle>Journal of Environmental Sciences</addtitle><description>The supercritical water gasification of phenolic wastewater without oxidant was performed to degrade pollutants and produce hydrogen-enriched gases. The simulated o-cresol wastewater was gasified at 440-650℃ and 27.6 MPa in a continuous Inconel 625 reactor with the residence time of 0.42-1.25 min. The influence of the reaction temperature, residence time, pressure, catalyst, oxidant and the pollutant concentration on the gasification efficiency was investigated. Higher temperature and longer residence time enhanced the o-cresol gasification. The TOC removal rate and hydrogen gasification rate were 90.6% and 194.6%, respectively, at the temperature of 650℃ and the residence time of 0.83 min. The product gas was mainly composed of H2, CO2, CFL and CO, among which the total molar percentage of H2 and CFL was higher than 50%. The gasification efficiency decreased with the pollutant concentration increasing. Both the catalyst and oxidant could accelerate the hydrocarbon gasification at a lower reaction temperature, in which the catalyst promoted H2 production and the oxidant enhanced CO2 generation. The intermediates of liquid effluents were analyzed and phenol was found to be the main composition. The results indicate that the supercritical gasification is a promising way for the treatment of hazardous organic wastewater.</description><subject>Bioelectric Energy Sources</subject><subject>Carbon Dioxide - analysis</subject><subject>Carbon Dioxide - chemistry</subject><subject>Catalysis</subject><subject>Cresols - chemistry</subject><subject>Hydrogen - analysis</subject><subject>Hydrogen - chemistry</subject><subject>Oxidants - chemistry</subject><subject>Oxidation-Reduction</subject><subject>Oxygen - analysis</subject><subject>Oxygen - chemistry</subject><subject>Pressure</subject><subject>Temperature</subject><subject>Time Factors</subject><subject>Waste Disposal, Fluid - methods</subject><subject>Water - chemistry</subject><subject>废水处理</subject><subject>气化工艺</subject><subject>超临界水</subject><issn>1001-0742</issn><issn>1878-7320</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkF1LwzAYhYMobk7_ghQR71rfJG3TeCfDLxh4oV6XNL7ZMrtmS1KG_96ObXh1zsXDOfAQcksh45zR-2VmQ-geKABNQeQsYwBlBnkGUJyQMa1ElQrO4HToR2ZELkJYAkBeQHFORlSAqAoux2T60a_Ra2-j1apN5ipYM7RoXZcY55O4wCR6VHGFXUycSVyqPQbXJlsVIm5VRH9JzoxqA14dckK-np8-p6_p7P3lbfo4SzWTVUx5Q4UpUKtCi6YsEVHyRjItpDQKlJKClgWTghc0b8A0NK9MyZnQpaJVY4BPyN1-d6s6o7p5vXS974bHeomhxp0HyAcL_-Dau02PIdYrGzS2rerQ9aGmUgpZlbvF6wPYNyv8rtferpT_rY9-BuBmD-iF6-YbO5w2Sv8Y22LNGCslo5L_Ab1ydYM</recordid><startdate>2006</startdate><enddate>2006</enddate><creator>Wei, Chao-hai</creator><creator>Hu, Cheng-sheng</creator><creator>Wu, Chao-fei</creator><creator>Yan, Bo</creator><general>College of Environmental Science and Technology, South China University of Technology, Guangzhou 510640, China</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7TV</scope><scope>7UA</scope><scope>C1K</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>2006</creationdate><title>Supercritical gasification for the treatment of o-cresol wastewater</title><author>Wei, Chao-hai ; 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The simulated o-cresol wastewater was gasified at 440-650℃ and 27.6 MPa in a continuous Inconel 625 reactor with the residence time of 0.42-1.25 min. The influence of the reaction temperature, residence time, pressure, catalyst, oxidant and the pollutant concentration on the gasification efficiency was investigated. Higher temperature and longer residence time enhanced the o-cresol gasification. The TOC removal rate and hydrogen gasification rate were 90.6% and 194.6%, respectively, at the temperature of 650℃ and the residence time of 0.83 min. The product gas was mainly composed of H2, CO2, CFL and CO, among which the total molar percentage of H2 and CFL was higher than 50%. The gasification efficiency decreased with the pollutant concentration increasing. Both the catalyst and oxidant could accelerate the hydrocarbon gasification at a lower reaction temperature, in which the catalyst promoted H2 production and the oxidant enhanced CO2 generation. The intermediates of liquid effluents were analyzed and phenol was found to be the main composition. The results indicate that the supercritical gasification is a promising way for the treatment of hazardous organic wastewater.</abstract><cop>Netherlands</cop><pub>College of Environmental Science and Technology, South China University of Technology, Guangzhou 510640, China</pub><pmid>17078539</pmid><doi>10.3321/j.issn:1001-0742.2006.04.005</doi><tpages>6</tpages></addata></record> |
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| source | MEDLINE; Alma/SFX Local Collection |
| subjects | Bioelectric Energy Sources Carbon Dioxide - analysis Carbon Dioxide - chemistry Catalysis Cresols - chemistry Hydrogen - analysis Hydrogen - chemistry Oxidants - chemistry Oxidation-Reduction Oxygen - analysis Oxygen - chemistry Pressure Temperature Time Factors Waste Disposal, Fluid - methods Water - chemistry 废水处理 气化工艺 超临界水 |
| title | Supercritical gasification for the treatment of o-cresol wastewater |
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