Self-oscillations in an airlift reactor
Oscillations in the gas holdup and liquid circulation velocity were found at low liquid levels in an airlift reactor with a designed gas–liquid separator. The hydrodynamic behavior and the frequency and amplitude of the oscillations were investigated. The gas holdup and liquid circulation velocity o...
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| Veröffentlicht in: | Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2010-05, Vol.160 (1), p.277-283 |
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| container_title | Chemical engineering journal (Lausanne, Switzerland : 1996) |
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| creator | Zhang, Nian Wang, Tiefeng Deng, Zhonghuo Wang, Jinfu |
| description | Oscillations in the gas holdup and liquid circulation velocity were found at low liquid levels in an airlift reactor with a designed gas–liquid separator. The hydrodynamic behavior and the frequency and amplitude of the oscillations were investigated. The gas holdup and liquid circulation velocity oscillated at the same frequency. The frequency increased from 0.07 to 0.18
Hz with an increase in the superficial gas velocity or liquid level. The gas holdup oscillation occurred mainly in the downcomer. The oscillation amplitude of the average gas holdup in the downcomer was 0.02 at superficial gas velocities of 0.03–0.06
m/s, and was close to zero at other superficial gas velocities. Using the superficial gas velocity and unaerated liquid level, the flow was classified into three regimes: non-circulating regime, self-oscillation regime and completely circulating regime. The self-oscillation regime, determined from the oscillation amplitude, became wider as the liquid level decreased. |
| doi_str_mv | 10.1016/j.cej.2010.03.005 |
| format | Article |
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Hz with an increase in the superficial gas velocity or liquid level. The gas holdup oscillation occurred mainly in the downcomer. The oscillation amplitude of the average gas holdup in the downcomer was 0.02 at superficial gas velocities of 0.03–0.06
m/s, and was close to zero at other superficial gas velocities. Using the superficial gas velocity and unaerated liquid level, the flow was classified into three regimes: non-circulating regime, self-oscillation regime and completely circulating regime. The self-oscillation regime, determined from the oscillation amplitude, became wider as the liquid level decreased.</description><identifier>ISSN: 1385-8947</identifier><identifier>EISSN: 1873-3212</identifier><identifier>DOI: 10.1016/j.cej.2010.03.005</identifier><language>eng</language><publisher>Oxford: Elsevier B.V</publisher><subject>Airlift reactor ; Applied sciences ; Chemical engineering ; Exact sciences and technology ; Gas holdup ; Hydrodynamics of contact apparatus ; Liquid circulation velocity ; Reactors ; Self-oscillation</subject><ispartof>Chemical engineering journal (Lausanne, Switzerland : 1996), 2010-05, Vol.160 (1), p.277-283</ispartof><rights>2010 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c359t-8993c0b9df0c11b4b89efe43943f4b7e23bbc2f9953653d796b1ef91c268ce9d3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.cej.2010.03.005$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22757905$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhang, Nian</creatorcontrib><creatorcontrib>Wang, Tiefeng</creatorcontrib><creatorcontrib>Deng, Zhonghuo</creatorcontrib><creatorcontrib>Wang, Jinfu</creatorcontrib><title>Self-oscillations in an airlift reactor</title><title>Chemical engineering journal (Lausanne, Switzerland : 1996)</title><description>Oscillations in the gas holdup and liquid circulation velocity were found at low liquid levels in an airlift reactor with a designed gas–liquid separator. The hydrodynamic behavior and the frequency and amplitude of the oscillations were investigated. The gas holdup and liquid circulation velocity oscillated at the same frequency. The frequency increased from 0.07 to 0.18
Hz with an increase in the superficial gas velocity or liquid level. The gas holdup oscillation occurred mainly in the downcomer. The oscillation amplitude of the average gas holdup in the downcomer was 0.02 at superficial gas velocities of 0.03–0.06
m/s, and was close to zero at other superficial gas velocities. Using the superficial gas velocity and unaerated liquid level, the flow was classified into three regimes: non-circulating regime, self-oscillation regime and completely circulating regime. The self-oscillation regime, determined from the oscillation amplitude, became wider as the liquid level decreased.</description><subject>Airlift reactor</subject><subject>Applied sciences</subject><subject>Chemical engineering</subject><subject>Exact sciences and technology</subject><subject>Gas holdup</subject><subject>Hydrodynamics of contact apparatus</subject><subject>Liquid circulation velocity</subject><subject>Reactors</subject><subject>Self-oscillation</subject><issn>1385-8947</issn><issn>1873-3212</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKs_wFsv0tOu-dhsNniS4hcUPKjnkMxOIMt2tyZbwX9vaotHYWBm4J15Zx5CrhktGWX1bVcCdiWnuaeipFSekBlrlCgEZ_w016KRRaMrdU4uUuoopbVmekaWb9j7YkwQ-t5OYRzSIgwLmyPEPvhpEdHCNMZLcuZtn_DqmOfk4_HhffVcrF-fXlb36wKE1FN20AKo062nwJirXKPRYyV0JXzlFHLhHHCvtRS1FK3StWPoNQNeN4C6FXOyPOzdxvFzh2kym5AA83EDjrtklBRKcqp0VrKDEuKYUkRvtjFsbPw2jJo9E9OZzMTsmRgqTGaSZ26O220C2_toBwjpb5BzJZX-1d0ddJhf_QoYTQaEA2AbIsJk2jH84_IDnWp1QQ</recordid><startdate>20100515</startdate><enddate>20100515</enddate><creator>Zhang, Nian</creator><creator>Wang, Tiefeng</creator><creator>Deng, Zhonghuo</creator><creator>Wang, Jinfu</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7SU</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>20100515</creationdate><title>Self-oscillations in an airlift reactor</title><author>Zhang, Nian ; Wang, Tiefeng ; Deng, Zhonghuo ; Wang, Jinfu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c359t-8993c0b9df0c11b4b89efe43943f4b7e23bbc2f9953653d796b1ef91c268ce9d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Airlift reactor</topic><topic>Applied sciences</topic><topic>Chemical engineering</topic><topic>Exact sciences and technology</topic><topic>Gas holdup</topic><topic>Hydrodynamics of contact apparatus</topic><topic>Liquid circulation velocity</topic><topic>Reactors</topic><topic>Self-oscillation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhang, Nian</creatorcontrib><creatorcontrib>Wang, Tiefeng</creatorcontrib><creatorcontrib>Deng, Zhonghuo</creatorcontrib><creatorcontrib>Wang, Jinfu</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Environmental Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><jtitle>Chemical engineering journal (Lausanne, Switzerland : 1996)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhang, Nian</au><au>Wang, Tiefeng</au><au>Deng, Zhonghuo</au><au>Wang, Jinfu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Self-oscillations in an airlift reactor</atitle><jtitle>Chemical engineering journal (Lausanne, Switzerland : 1996)</jtitle><date>2010-05-15</date><risdate>2010</risdate><volume>160</volume><issue>1</issue><spage>277</spage><epage>283</epage><pages>277-283</pages><issn>1385-8947</issn><eissn>1873-3212</eissn><abstract>Oscillations in the gas holdup and liquid circulation velocity were found at low liquid levels in an airlift reactor with a designed gas–liquid separator. The hydrodynamic behavior and the frequency and amplitude of the oscillations were investigated. The gas holdup and liquid circulation velocity oscillated at the same frequency. The frequency increased from 0.07 to 0.18
Hz with an increase in the superficial gas velocity or liquid level. The gas holdup oscillation occurred mainly in the downcomer. The oscillation amplitude of the average gas holdup in the downcomer was 0.02 at superficial gas velocities of 0.03–0.06
m/s, and was close to zero at other superficial gas velocities. Using the superficial gas velocity and unaerated liquid level, the flow was classified into three regimes: non-circulating regime, self-oscillation regime and completely circulating regime. The self-oscillation regime, determined from the oscillation amplitude, became wider as the liquid level decreased.</abstract><cop>Oxford</cop><pub>Elsevier B.V</pub><doi>10.1016/j.cej.2010.03.005</doi><tpages>7</tpages></addata></record> |
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| subjects | Airlift reactor Applied sciences Chemical engineering Exact sciences and technology Gas holdup Hydrodynamics of contact apparatus Liquid circulation velocity Reactors Self-oscillation |
| title | Self-oscillations in an airlift reactor |
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