Simulation of flash dehydroxylation of clay particle using gPROMS: A move towards green concrete

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

Research output: Contribution to journalConference article in JournalResearchpeer-review

2 Citations (Scopus)

Abstract

The use of SCMs (supplementary cementitious materials) to replace part of the clinker in cement industry is gaining an increasing interest in order to reduce the CO2 footprint. The abundantly available clay minerals are potential sources of SCMs. Thermal treatment of kaolinite clay under moderate temperatures (700-1000K) yields an amorphous phase called metakaolinite, a material that has great promise as a mineral admixture for cement and concrete. However, the optimum properties of metakaolinite are highly dependent on operating temperature and residence time during thermal treatment. This article presents the development of a numerical model for the simulation of dehydroxylation of kaolinite clay using gPROMS (general PROcess Modeling System). Accordingly, a 1D dehydroxylation model is used to examine the thermal transformation of kaolinite into different phases. This model is used to predict the temperature and residence time at which the kaolinite particle attains optimum pozzolanic reactivity. The usefulness and validity of the method is evaluated by comparing the predicted variables with experimental values collected from a gas suspension calciner (GSC).
Original languageEnglish
JournalEnergy Procedia
Volume61
Pages (from-to)556-559
Number of pages4
ISSN1876-6102
DOIs
Publication statusPublished - 2014
Event6th International Conference on Applied Energy - Taipei, Taiwan, Province of China
Duration: 30 May 20142 Jun 2014

Conference

Conference6th International Conference on Applied Energy
CountryTaiwan, Province of China
CityTaipei
Period30/05/201402/06/2014

Fingerprint

Kaolinite
Clay
Concretes
Heat treatment
Cement industry
Clay minerals
Temperature
Numerical models
Cements
Minerals
Gases

Keywords

  • Dehydroxylation
  • gPROMS
  • Kaolinite
  • Metakaolinite
  • Modelling
  • SCM

Cite this

Gebremariam, Abraham Teklay ; Bøjer, Martin ; Adelsward, Anicka ; Yin, Chungen ; Rosendahl, Lasse. / Simulation of flash dehydroxylation of clay particle using gPROMS : A move towards green concrete. In: Energy Procedia. 2014 ; Vol. 61. pp. 556-559.
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title = "Simulation of flash dehydroxylation of clay particle using gPROMS: A move towards green concrete",
abstract = "The use of SCMs (supplementary cementitious materials) to replace part of the clinker in cement industry is gaining an increasing interest in order to reduce the CO2 footprint. The abundantly available clay minerals are potential sources of SCMs. Thermal treatment of kaolinite clay under moderate temperatures (700-1000K) yields an amorphous phase called metakaolinite, a material that has great promise as a mineral admixture for cement and concrete. However, the optimum properties of metakaolinite are highly dependent on operating temperature and residence time during thermal treatment. This article presents the development of a numerical model for the simulation of dehydroxylation of kaolinite clay using gPROMS (general PROcess Modeling System). Accordingly, a 1D dehydroxylation model is used to examine the thermal transformation of kaolinite into different phases. This model is used to predict the temperature and residence time at which the kaolinite particle attains optimum pozzolanic reactivity. The usefulness and validity of the method is evaluated by comparing the predicted variables with experimental values collected from a gas suspension calciner (GSC).",
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Simulation of flash dehydroxylation of clay particle using gPROMS : A move towards green concrete. / Gebremariam, Abraham Teklay; Bøjer, Martin; Adelsward, Anicka; Yin, Chungen; Rosendahl, Lasse.

In: Energy Procedia, Vol. 61, 2014, p. 556-559.

Research output: Contribution to journalConference article in JournalResearchpeer-review

TY - GEN

T1 - Simulation of flash dehydroxylation of clay particle using gPROMS

T2 - A move towards green concrete

AU - Gebremariam, Abraham Teklay

AU - Bøjer, Martin

AU - Adelsward, Anicka

AU - Yin, Chungen

AU - Rosendahl, Lasse

PY - 2014

Y1 - 2014

N2 - The use of SCMs (supplementary cementitious materials) to replace part of the clinker in cement industry is gaining an increasing interest in order to reduce the CO2 footprint. The abundantly available clay minerals are potential sources of SCMs. Thermal treatment of kaolinite clay under moderate temperatures (700-1000K) yields an amorphous phase called metakaolinite, a material that has great promise as a mineral admixture for cement and concrete. However, the optimum properties of metakaolinite are highly dependent on operating temperature and residence time during thermal treatment. This article presents the development of a numerical model for the simulation of dehydroxylation of kaolinite clay using gPROMS (general PROcess Modeling System). Accordingly, a 1D dehydroxylation model is used to examine the thermal transformation of kaolinite into different phases. This model is used to predict the temperature and residence time at which the kaolinite particle attains optimum pozzolanic reactivity. The usefulness and validity of the method is evaluated by comparing the predicted variables with experimental values collected from a gas suspension calciner (GSC).

AB - The use of SCMs (supplementary cementitious materials) to replace part of the clinker in cement industry is gaining an increasing interest in order to reduce the CO2 footprint. The abundantly available clay minerals are potential sources of SCMs. Thermal treatment of kaolinite clay under moderate temperatures (700-1000K) yields an amorphous phase called metakaolinite, a material that has great promise as a mineral admixture for cement and concrete. However, the optimum properties of metakaolinite are highly dependent on operating temperature and residence time during thermal treatment. This article presents the development of a numerical model for the simulation of dehydroxylation of kaolinite clay using gPROMS (general PROcess Modeling System). Accordingly, a 1D dehydroxylation model is used to examine the thermal transformation of kaolinite into different phases. This model is used to predict the temperature and residence time at which the kaolinite particle attains optimum pozzolanic reactivity. The usefulness and validity of the method is evaluated by comparing the predicted variables with experimental values collected from a gas suspension calciner (GSC).

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KW - Metakaolinite

KW - Modelling

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