Calcination of kaolinite clay particles for cement production: A modeling study

Abraham Teklay Gebremariam, Chungen Yin, Lasse Rosendahl, Martin Bøjer

Research output: Contribution to journalJournal articleResearchpeer-review

12 Citations (Scopus)

Abstract

Kaolinite rich clay particles calcined under certain conditions can attain favorable pozzolanic properties and can be used to substitute part of the CO2 intensive clinker in cement production. To better guide calcination of a clay material, a transient one-dimensional single particle model is developed, which fully addresses the conversion process of raw kaolinite particles suspended in hot gas. Particles are discretized into a number of spherical cells, on each of which mass, momentum, energy and species conservation equations are numerically solved by using the finite volume method. Reactions considered in the model include dehydration, dehydroxylation and various phase transformations. Thermogravimetric analysis is used to determine reaction kinetic data required as inputs in the model and to validate the model. Finally, model-based sensitivity analysis is performed, from which quantitative guidelines for calcination condition optimization are derived.
Original languageEnglish
JournalCement and Concrete Research
Volume61-62
Pages (from-to)11-19
Number of pages9
ISSN0008-8846
DOIs
Publication statusPublished - Jul 2014

Fingerprint

Kaolin
Kaolinite
Calcination
Cements
Clay
Finite volume method
Dehydration
Reaction kinetics
Sensitivity analysis
Thermogravimetric analysis
Conservation
Momentum
Gases
Phase transitions
clay

Keywords

  • Thermal treatment
  • Thermal analysis
  • Metakaolin
  • Modeling

Cite this

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title = "Calcination of kaolinite clay particles for cement production: A modeling study",
abstract = "Kaolinite rich clay particles calcined under certain conditions can attain favorable pozzolanic properties and can be used to substitute part of the CO2 intensive clinker in cement production. To better guide calcination of a clay material, a transient one-dimensional single particle model is developed, which fully addresses the conversion process of raw kaolinite particles suspended in hot gas. Particles are discretized into a number of spherical cells, on each of which mass, momentum, energy and species conservation equations are numerically solved by using the finite volume method. Reactions considered in the model include dehydration, dehydroxylation and various phase transformations. Thermogravimetric analysis is used to determine reaction kinetic data required as inputs in the model and to validate the model. Finally, model-based sensitivity analysis is performed, from which quantitative guidelines for calcination condition optimization are derived.",
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Calcination of kaolinite clay particles for cement production : A modeling study. / Gebremariam, Abraham Teklay; Yin, Chungen; Rosendahl, Lasse; Bøjer, Martin.

In: Cement and Concrete Research, Vol. 61-62, 07.2014, p. 11-19.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Calcination of kaolinite clay particles for cement production

T2 - A modeling study

AU - Gebremariam, Abraham Teklay

AU - Yin, Chungen

AU - Rosendahl, Lasse

AU - Bøjer, Martin

PY - 2014/7

Y1 - 2014/7

N2 - Kaolinite rich clay particles calcined under certain conditions can attain favorable pozzolanic properties and can be used to substitute part of the CO2 intensive clinker in cement production. To better guide calcination of a clay material, a transient one-dimensional single particle model is developed, which fully addresses the conversion process of raw kaolinite particles suspended in hot gas. Particles are discretized into a number of spherical cells, on each of which mass, momentum, energy and species conservation equations are numerically solved by using the finite volume method. Reactions considered in the model include dehydration, dehydroxylation and various phase transformations. Thermogravimetric analysis is used to determine reaction kinetic data required as inputs in the model and to validate the model. Finally, model-based sensitivity analysis is performed, from which quantitative guidelines for calcination condition optimization are derived.

AB - Kaolinite rich clay particles calcined under certain conditions can attain favorable pozzolanic properties and can be used to substitute part of the CO2 intensive clinker in cement production. To better guide calcination of a clay material, a transient one-dimensional single particle model is developed, which fully addresses the conversion process of raw kaolinite particles suspended in hot gas. Particles are discretized into a number of spherical cells, on each of which mass, momentum, energy and species conservation equations are numerically solved by using the finite volume method. Reactions considered in the model include dehydration, dehydroxylation and various phase transformations. Thermogravimetric analysis is used to determine reaction kinetic data required as inputs in the model and to validate the model. Finally, model-based sensitivity analysis is performed, from which quantitative guidelines for calcination condition optimization are derived.

KW - Thermal treatment

KW - Thermal analysis

KW - Metakaolin

KW - Modeling

U2 - 10.1016/j.cemconres.2014.04.002

DO - 10.1016/j.cemconres.2014.04.002

M3 - Journal article

VL - 61-62

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JO - Cement and Concrete Research

JF - Cement and Concrete Research

SN - 0008-8846

ER -