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Fluidization dynamics of cohesive Geldart B particles. Part I : X-ray tomography analysis. / Ma, Jiliang; van Ommen, J. Ruud; Liu, Daoyin; Mudde, Robert F.; Chen, Xiaoping; Wagner, Evert C.; Liang, Cai.

In: Chemical Engineering Journal, Vol. 359, 2019, p. 1024-1034.

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Ma, Jiliang ; van Ommen, J. Ruud ; Liu, Daoyin ; Mudde, Robert F. ; Chen, Xiaoping ; Wagner, Evert C. ; Liang, Cai. / Fluidization dynamics of cohesive Geldart B particles. Part I : X-ray tomography analysis. In: Chemical Engineering Journal. 2019 ; Vol. 359. pp. 1024-1034.

BibTeX

@article{11523521351a44e6802a34e4c40ccd22,
title = "Fluidization dynamics of cohesive Geldart B particles. Part I: X-ray tomography analysis",
abstract = "Due to the presence of inter-particle cohesive force, cohesive particles reveal totally different fluidization behaviors as compared to the non-cohesive system. This paper studies the fluidization dynamics of Geldart B particles with varying thermal-induced cohesive forces. Multi-source X-ray tomography was applied to reconstruct 3D temporal images of bubbles, based on which, various bubble properties were extracted. The results show that increasing cohesive force will decrease bubble number while increase bubble size, implying that the presence of cohesive force facilitates bubble coalescence. By examining the bubble size distribution, cohesive force is found to have no effect on the number of median bubbles but greatly influence small and large bubbles. When the cohesive force is strong, the bubbles grow to a considerable size similar with bed dimension, giving rise to slugging near bed surface. With the action of inter-particle cohesive force, particle slug gradually grows by capturing other freely fluidizing particles, finally inducing “whole-bed” slugging. The particle slug may rupture in the rising process, and the bed turns back to normal fluidization. In comparison to normal bubbles, the gas slug has much larger size but far smaller frequency. The rise velocity of gas slug is also very low due to the particle-wall friction and gas-solid momentum dissipation. Therefore, the averaged values of bubble properties dramatically changed as bed temperature exceeds 35 °C. When the temperature attains 45 °C, the cohesive force is so strong that the fluidization completely fails in terms of stable whole-bed slugging.",
keywords = "Bubble, Cohesive particle, Fluidization, Slugging, X-ray tomography",
author = "Jiliang Ma and {van Ommen}, {J. Ruud} and Daoyin Liu and Mudde, {Robert F.} and Xiaoping Chen and Wagner, {Evert C.} and Cai Liang",
note = "Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",
year = "2019",
doi = "10.1016/j.cej.2018.11.082",
language = "English",
volume = "359",
pages = "1024--1034",
journal = "Chemical Engineering Journal",
issn = "1385-8947",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Fluidization dynamics of cohesive Geldart B particles. Part I

T2 - Chemical Engineering Journal

AU - Ma, Jiliang

AU - van Ommen, J. Ruud

AU - Liu, Daoyin

AU - Mudde, Robert F.

AU - Chen, Xiaoping

AU - Wagner, Evert C.

AU - Liang, Cai

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2019

Y1 - 2019

N2 - Due to the presence of inter-particle cohesive force, cohesive particles reveal totally different fluidization behaviors as compared to the non-cohesive system. This paper studies the fluidization dynamics of Geldart B particles with varying thermal-induced cohesive forces. Multi-source X-ray tomography was applied to reconstruct 3D temporal images of bubbles, based on which, various bubble properties were extracted. The results show that increasing cohesive force will decrease bubble number while increase bubble size, implying that the presence of cohesive force facilitates bubble coalescence. By examining the bubble size distribution, cohesive force is found to have no effect on the number of median bubbles but greatly influence small and large bubbles. When the cohesive force is strong, the bubbles grow to a considerable size similar with bed dimension, giving rise to slugging near bed surface. With the action of inter-particle cohesive force, particle slug gradually grows by capturing other freely fluidizing particles, finally inducing “whole-bed” slugging. The particle slug may rupture in the rising process, and the bed turns back to normal fluidization. In comparison to normal bubbles, the gas slug has much larger size but far smaller frequency. The rise velocity of gas slug is also very low due to the particle-wall friction and gas-solid momentum dissipation. Therefore, the averaged values of bubble properties dramatically changed as bed temperature exceeds 35 °C. When the temperature attains 45 °C, the cohesive force is so strong that the fluidization completely fails in terms of stable whole-bed slugging.

AB - Due to the presence of inter-particle cohesive force, cohesive particles reveal totally different fluidization behaviors as compared to the non-cohesive system. This paper studies the fluidization dynamics of Geldart B particles with varying thermal-induced cohesive forces. Multi-source X-ray tomography was applied to reconstruct 3D temporal images of bubbles, based on which, various bubble properties were extracted. The results show that increasing cohesive force will decrease bubble number while increase bubble size, implying that the presence of cohesive force facilitates bubble coalescence. By examining the bubble size distribution, cohesive force is found to have no effect on the number of median bubbles but greatly influence small and large bubbles. When the cohesive force is strong, the bubbles grow to a considerable size similar with bed dimension, giving rise to slugging near bed surface. With the action of inter-particle cohesive force, particle slug gradually grows by capturing other freely fluidizing particles, finally inducing “whole-bed” slugging. The particle slug may rupture in the rising process, and the bed turns back to normal fluidization. In comparison to normal bubbles, the gas slug has much larger size but far smaller frequency. The rise velocity of gas slug is also very low due to the particle-wall friction and gas-solid momentum dissipation. Therefore, the averaged values of bubble properties dramatically changed as bed temperature exceeds 35 °C. When the temperature attains 45 °C, the cohesive force is so strong that the fluidization completely fails in terms of stable whole-bed slugging.

KW - Bubble

KW - Cohesive particle

KW - Fluidization

KW - Slugging

KW - X-ray tomography

UR - http://www.scopus.com/inward/record.url?scp=85056629715&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2018.11.082

DO - 10.1016/j.cej.2018.11.082

M3 - Article

VL - 359

SP - 1024

EP - 1034

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

ER -

ID: 47688680