Modeling of calcination of single kaolinitic clay particle

Abraham Teklay Gebremariam; Chungen Yin; Lasse Rosendahl

Modeling of calcination of single kaolinitic clay particle

Abraham Teklay Gebremariam, Chungen Yin, Lasse Rosendahl

AAU Energy

Research output: Contribution to conference without publisher/journal › Paper without publisher/journal › Research › peer-review

Abstract

The present work aims at modeling of the calcination (dehydroxylation) process of clay particles, specifically kaolinite, and its thermal transformation. For such purpose, 1D single particle calcination model was developed based on the concept of shrinking core model to assess the dehydroxylation process with special emphasis given to the heat and mass transfer phenomena on the particle surface, heat conduction from surface to reaction front, chemical kinetics at reaction front and diffusion of the water through the product layer. The mathematical model is used to predict the transient temperature distribution within the clay particle and simultaneous density changes due to the reaction kinetics. Accordingly, a particular residence time was noticed as a point where kaolinitic clay particles attain optimum conversion to metakaolinite which is pozzolanic.

Original language	English
Publication date	2013
Number of pages	19
Publication status	Published - 2013
Event	8th International Conference on Multiphase Flow - Jeju, Korea, Republic of Duration: 26 May 2013 → 31 May 2013

Conference

Conference	8th International Conference on Multiphase Flow
Country/Territory	Korea, Republic of
City	Jeju
Period	26/05/2013 → 31/05/2013

Keywords

Modeling
Discretization
Calcination
Dehydroxylation
Kaolin

Access to Document

http://www.icmf2013.org/file/program_schedule_130524.xlsx

AUB Link

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SCM: SCM - Manufacturing of highly reactive Supplementary Cementitious Materials for low-CO2 cement (The Danish National Advanced Technology Foundation, 095-2010-1)
Rosendahl, L., Yin, C. & Gebremariam, A. T.
01/08/2011 → 31/12/2014
Project: Research

Cite this

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title = "Modeling of calcination of single kaolinitic clay particle",

abstract = "The present work aims at modeling of the calcination (dehydroxylation) process of clay particles, specifically kaolinite, and its thermal transformation. For such purpose, 1D single particle calcination model was developed based on the concept of shrinking core model to assess the dehydroxylation process with special emphasis given to the heat and mass transfer phenomena on the particle surface, heat conduction from surface to reaction front, chemical kinetics at reaction front and diffusion of the water through the product layer. The mathematical model is used to predict the transient temperature distribution within the clay particle and simultaneous density changes due to the reaction kinetics. Accordingly, a particular residence time was noticed as a point where kaolinitic clay particles attain optimum conversion to metakaolinite which is pozzolanic.",

keywords = "Modeling, Discretization, Calcination, Dehydroxylation, Kaolin",

author = "Gebremariam, {Abraham Teklay} and Chungen Yin and Lasse Rosendahl",

year = "2013",

language = "English",

note = "8th International Conference on Multiphase Flow ; Conference date: 26-05-2013 Through 31-05-2013",

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TY - CONF

T1 - Modeling of calcination of single kaolinitic clay particle

AU - Gebremariam, Abraham Teklay

AU - Yin, Chungen

AU - Rosendahl, Lasse

PY - 2013

Y1 - 2013

N2 - The present work aims at modeling of the calcination (dehydroxylation) process of clay particles, specifically kaolinite, and its thermal transformation. For such purpose, 1D single particle calcination model was developed based on the concept of shrinking core model to assess the dehydroxylation process with special emphasis given to the heat and mass transfer phenomena on the particle surface, heat conduction from surface to reaction front, chemical kinetics at reaction front and diffusion of the water through the product layer. The mathematical model is used to predict the transient temperature distribution within the clay particle and simultaneous density changes due to the reaction kinetics. Accordingly, a particular residence time was noticed as a point where kaolinitic clay particles attain optimum conversion to metakaolinite which is pozzolanic.

AB - The present work aims at modeling of the calcination (dehydroxylation) process of clay particles, specifically kaolinite, and its thermal transformation. For such purpose, 1D single particle calcination model was developed based on the concept of shrinking core model to assess the dehydroxylation process with special emphasis given to the heat and mass transfer phenomena on the particle surface, heat conduction from surface to reaction front, chemical kinetics at reaction front and diffusion of the water through the product layer. The mathematical model is used to predict the transient temperature distribution within the clay particle and simultaneous density changes due to the reaction kinetics. Accordingly, a particular residence time was noticed as a point where kaolinitic clay particles attain optimum conversion to metakaolinite which is pozzolanic.

KW - Modeling

KW - Discretization

KW - Calcination

KW - Dehydroxylation

KW - Kaolin

M3 - Paper without publisher/journal

T2 - 8th International Conference on Multiphase Flow

Y2 - 26 May 2013 through 31 May 2013

ER -

Modeling of calcination of single kaolinitic clay particle

Abstract

Conference

Keywords

Access to Document

AUB Link

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Projects

SCM: SCM - Manufacturing of highly reactive Supplementary Cementitious Materials for low-CO2 cement (The Danish National Advanced Technology Foundation, 095-2010-1)

Cite this