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Study of transition velocities from bubbling to turbulent fluidization by statistic and wavelet multi-resolution analysis on absolute pressure fluctuations
Experiments were conducted in three circulating fluidized beds of 70 mm - i . d . × 2.2 in high, 108 mm - i . d . × 7 m high and 108 mm - i . d . × 5.75 m high (with an expanded top section of 1.5 m high) at ambient condition. The spent fluid cracking catalyst (FCC), glass beads and sand particles w...
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| Published in: | Chemical engineering science 2008-04, Vol.63 (7), p.1950-1970 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c504t-d22d5a6fd3ddf08243eb9c80be951adb0fedee4e68a6d0ab883eb3a894fb9d793 |
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| cites | cdi_FETCH-LOGICAL-c504t-d22d5a6fd3ddf08243eb9c80be951adb0fedee4e68a6d0ab883eb3a894fb9d793 |
| container_end_page | 1970 |
| container_issue | 7 |
| container_start_page | 1950 |
| container_title | Chemical engineering science |
| container_volume | 63 |
| creator | Yang, Tung-Yu Leu, Lii-ping |
| description | Experiments were conducted in three circulating fluidized beds of
70
mm
-
i
.
d
.
×
2.2
in
high,
108
mm
-
i
.
d
.
×
7
m
high and
108
mm
-
i
.
d
.
×
5.75
m
high (with an expanded top section of 1.5
m high) at ambient condition. The spent fluid cracking catalyst (FCC), glass beads and sand particles were taken as bed materials. The transition velocities
U
c
and
U
k
were analyzed by means of traditional statistic analysis and multi-resolution analysis (MRA) of wavelet analysis on the absolute pressure fluctuation (APF) signals acquired at different axial positions in the beds. According to the standard deviation of APF, the effects of axial positions and static bed heights on
U
c
and
U
k
were systematically investigated. An appropriate measuring interval of relative axial position was recommended to identify
U
k
and two correlations calculated by regression of data in literatures and this work were proposed to predict
U
c
and
U
k
for absolute pressure measurement. By means of MRA of wavelet analysis, a redefined variable, homogeneous index HI, deduced from the energy of SF and LF subsignals, was successfully applied to determine the
U
c
and
U
k
and demarcated the dynamic behaviors of Geldart group A (spent FCC) and group B (sand particles and glass beads) particles in the circulating fluidized beds. |
| doi_str_mv | 10.1016/j.ces.2007.12.024 |
| format | article |
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70
mm
-
i
.
d
.
×
2.2
in
high,
108
mm
-
i
.
d
.
×
7
m
high and
108
mm
-
i
.
d
.
×
5.75
m
high (with an expanded top section of 1.5
m high) at ambient condition. The spent fluid cracking catalyst (FCC), glass beads and sand particles were taken as bed materials. The transition velocities
U
c
and
U
k
were analyzed by means of traditional statistic analysis and multi-resolution analysis (MRA) of wavelet analysis on the absolute pressure fluctuation (APF) signals acquired at different axial positions in the beds. According to the standard deviation of APF, the effects of axial positions and static bed heights on
U
c
and
U
k
were systematically investigated. An appropriate measuring interval of relative axial position was recommended to identify
U
k
and two correlations calculated by regression of data in literatures and this work were proposed to predict
U
c
and
U
k
for absolute pressure measurement. By means of MRA of wavelet analysis, a redefined variable, homogeneous index HI, deduced from the energy of SF and LF subsignals, was successfully applied to determine the
U
c
and
U
k
and demarcated the dynamic behaviors of Geldart group A (spent FCC) and group B (sand particles and glass beads) particles in the circulating fluidized beds.</description><identifier>ISSN: 0009-2509</identifier><identifier>EISSN: 1873-4405</identifier><identifier>DOI: 10.1016/j.ces.2007.12.024</identifier><identifier>CODEN: CESCAC</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Applied sciences ; Catalysis ; Catalytic reactions ; Chemical engineering ; Chemistry ; Exact sciences and technology ; Fluidization ; General and physical chemistry ; Multi-resolution analysis ; Pressure fluctuations ; Reactors ; Regime transition ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Transition velocity ; Turbulent fluidization ; Wavelet transformation</subject><ispartof>Chemical engineering science, 2008-04, Vol.63 (7), p.1950-1970</ispartof><rights>2008 Elsevier Ltd</rights><rights>2008 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c504t-d22d5a6fd3ddf08243eb9c80be951adb0fedee4e68a6d0ab883eb3a894fb9d793</citedby><cites>FETCH-LOGICAL-c504t-d22d5a6fd3ddf08243eb9c80be951adb0fedee4e68a6d0ab883eb3a894fb9d793</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20210693$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Yang, Tung-Yu</creatorcontrib><creatorcontrib>Leu, Lii-ping</creatorcontrib><title>Study of transition velocities from bubbling to turbulent fluidization by statistic and wavelet multi-resolution analysis on absolute pressure fluctuations</title><title>Chemical engineering science</title><description>Experiments were conducted in three circulating fluidized beds of
70
mm
-
i
.
d
.
×
2.2
in
high,
108
mm
-
i
.
d
.
×
7
m
high and
108
mm
-
i
.
d
.
×
5.75
m
high (with an expanded top section of 1.5
m high) at ambient condition. The spent fluid cracking catalyst (FCC), glass beads and sand particles were taken as bed materials. The transition velocities
U
c
and
U
k
were analyzed by means of traditional statistic analysis and multi-resolution analysis (MRA) of wavelet analysis on the absolute pressure fluctuation (APF) signals acquired at different axial positions in the beds. According to the standard deviation of APF, the effects of axial positions and static bed heights on
U
c
and
U
k
were systematically investigated. An appropriate measuring interval of relative axial position was recommended to identify
U
k
and two correlations calculated by regression of data in literatures and this work were proposed to predict
U
c
and
U
k
for absolute pressure measurement. By means of MRA of wavelet analysis, a redefined variable, homogeneous index HI, deduced from the energy of SF and LF subsignals, was successfully applied to determine the
U
c
and
U
k
and demarcated the dynamic behaviors of Geldart group A (spent FCC) and group B (sand particles and glass beads) particles in the circulating fluidized beds.</description><subject>Applied sciences</subject><subject>Catalysis</subject><subject>Catalytic reactions</subject><subject>Chemical engineering</subject><subject>Chemistry</subject><subject>Exact sciences and technology</subject><subject>Fluidization</subject><subject>General and physical chemistry</subject><subject>Multi-resolution analysis</subject><subject>Pressure fluctuations</subject><subject>Reactors</subject><subject>Regime transition</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Transition velocity</subject><subject>Turbulent fluidization</subject><subject>Wavelet transformation</subject><issn>0009-2509</issn><issn>1873-4405</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNp9kcuOFCEUhitGE9vRB3DHRndVHqh7XJmJt2QSF-qacDkYOnTRcmBM-yq-rHT3xKUrfsh3PgJ_07zk0HHg05t9Z5A6ATB3XHQghkfNji9z3w4DjI-bHQCsrRhhfdo8I9rX7Txz2DV_vuZiTyw6lpPayGcfN3aPIZoakZhL8cB00Tr47QfLkeWSdAm4ZeZC8db_VpcRfWKUa6TsDVObZb9UtWBmhxKybxNSDOVCqk2FE3li56wvx8iOFaCS8Cw1uVyc9Lx54lQgfPGw3jTfP7z_dvupvfvy8fPtu7vWjDDk1gphRzU521vrYBFDj3o1C2hcR66sBocWccBpUZMFpZelAr1a1sHp1c5rf9O8vnqPKf4sSFkePBkMQW0YC8leTDOM0FeQX0GTIlFCJ4_JH1Q6SQ7yXIPcy1qDPNcguZC1hjrz6kGuyKjg6i8bT_8GBQgO03p2v71yWF967zFJMh43g9YnNFna6P9zy1_blKQn</recordid><startdate>20080401</startdate><enddate>20080401</enddate><creator>Yang, Tung-Yu</creator><creator>Leu, Lii-ping</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>L7M</scope></search><sort><creationdate>20080401</creationdate><title>Study of transition velocities from bubbling to turbulent fluidization by statistic and wavelet multi-resolution analysis on absolute pressure fluctuations</title><author>Yang, Tung-Yu ; Leu, Lii-ping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c504t-d22d5a6fd3ddf08243eb9c80be951adb0fedee4e68a6d0ab883eb3a894fb9d793</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Applied sciences</topic><topic>Catalysis</topic><topic>Catalytic reactions</topic><topic>Chemical engineering</topic><topic>Chemistry</topic><topic>Exact sciences and technology</topic><topic>Fluidization</topic><topic>General and physical chemistry</topic><topic>Multi-resolution analysis</topic><topic>Pressure fluctuations</topic><topic>Reactors</topic><topic>Regime transition</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>Transition velocity</topic><topic>Turbulent fluidization</topic><topic>Wavelet transformation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yang, Tung-Yu</creatorcontrib><creatorcontrib>Leu, Lii-ping</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Chemical engineering science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yang, Tung-Yu</au><au>Leu, Lii-ping</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Study of transition velocities from bubbling to turbulent fluidization by statistic and wavelet multi-resolution analysis on absolute pressure fluctuations</atitle><jtitle>Chemical engineering science</jtitle><date>2008-04-01</date><risdate>2008</risdate><volume>63</volume><issue>7</issue><spage>1950</spage><epage>1970</epage><pages>1950-1970</pages><issn>0009-2509</issn><eissn>1873-4405</eissn><coden>CESCAC</coden><abstract>Experiments were conducted in three circulating fluidized beds of
70
mm
-
i
.
d
.
×
2.2
in
high,
108
mm
-
i
.
d
.
×
7
m
high and
108
mm
-
i
.
d
.
×
5.75
m
high (with an expanded top section of 1.5
m high) at ambient condition. The spent fluid cracking catalyst (FCC), glass beads and sand particles were taken as bed materials. The transition velocities
U
c
and
U
k
were analyzed by means of traditional statistic analysis and multi-resolution analysis (MRA) of wavelet analysis on the absolute pressure fluctuation (APF) signals acquired at different axial positions in the beds. According to the standard deviation of APF, the effects of axial positions and static bed heights on
U
c
and
U
k
were systematically investigated. An appropriate measuring interval of relative axial position was recommended to identify
U
k
and two correlations calculated by regression of data in literatures and this work were proposed to predict
U
c
and
U
k
for absolute pressure measurement. By means of MRA of wavelet analysis, a redefined variable, homogeneous index HI, deduced from the energy of SF and LF subsignals, was successfully applied to determine the
U
c
and
U
k
and demarcated the dynamic behaviors of Geldart group A (spent FCC) and group B (sand particles and glass beads) particles in the circulating fluidized beds.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ces.2007.12.024</doi><tpages>21</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0009-2509 |
| ispartof | Chemical engineering science, 2008-04, Vol.63 (7), p.1950-1970 |
| issn | 0009-2509 1873-4405 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_32670503 |
| source | ScienceDirect Journals |
| subjects | Applied sciences Catalysis Catalytic reactions Chemical engineering Chemistry Exact sciences and technology Fluidization General and physical chemistry Multi-resolution analysis Pressure fluctuations Reactors Regime transition Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Transition velocity Turbulent fluidization Wavelet transformation |
| title | Study of transition velocities from bubbling to turbulent fluidization by statistic and wavelet multi-resolution analysis on absolute pressure fluctuations |
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