Modeling of mass transfers in a porous green compact with two-component binder during thermal debinding

L. E. Khoong, Y. C. Lam, J. C. Chai, J. Ma, L. Jiang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Mass transfers and phase changes of two-component binder in a porous green compact during thermal debinding process are modeled. The evaporation of low molecular weight (LMW) component and volatile fragments, the thermal degradation of high molecular weight (HMW) component, the capillary driven and pressure driven liquid phase transports, the binary diffusion in solutions, the convection and diffusion of gas phases, and the heat transfer in a porous medium are captured in the model. The model is validated with experimental data. The simulated results show that mass transfers during the early stage of thermal debinding are mainly due to capillary driven and pressure driven liquid transports. During the final stage of thermal debinding, both convective liquid and gas transports are important in binder removal. The developed model provides physical understanding of binder removal mechanisms that are essential for process optimization.

LanguageEnglish
Pages2837-2850
Number of pages14
JournalChemical Engineering Science
Volume64
Issue number12
Early online date14 Mar 2009
DOIs
Publication statusPublished - 15 Jun 2009
Externally publishedYes

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Mass Transfer
Binders
Mass transfer
Liquids
Liquid
Gases
Molecular weight
Modeling
Porous materials
Volatiles
Phase Change
Evaporation
Pyrolysis
Process Optimization
Physical Model
Heat transfer
Porous Media
Convection
Heat Transfer
Fragment

Cite this

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title = "Modeling of mass transfers in a porous green compact with two-component binder during thermal debinding",
abstract = "Mass transfers and phase changes of two-component binder in a porous green compact during thermal debinding process are modeled. The evaporation of low molecular weight (LMW) component and volatile fragments, the thermal degradation of high molecular weight (HMW) component, the capillary driven and pressure driven liquid phase transports, the binary diffusion in solutions, the convection and diffusion of gas phases, and the heat transfer in a porous medium are captured in the model. The model is validated with experimental data. The simulated results show that mass transfers during the early stage of thermal debinding are mainly due to capillary driven and pressure driven liquid transports. During the final stage of thermal debinding, both convective liquid and gas transports are important in binder removal. The developed model provides physical understanding of binder removal mechanisms that are essential for process optimization.",
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Modeling of mass transfers in a porous green compact with two-component binder during thermal debinding. / Khoong, L. E.; Lam, Y. C.; Chai, J. C.; Ma, J.; Jiang, L.

In: Chemical Engineering Science, Vol. 64, No. 12, 15.06.2009, p. 2837-2850.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Modeling of mass transfers in a porous green compact with two-component binder during thermal debinding

AU - Khoong, L. E.

AU - Lam, Y. C.

AU - Chai, J. C.

AU - Ma, J.

AU - Jiang, L.

PY - 2009/6/15

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AB - Mass transfers and phase changes of two-component binder in a porous green compact during thermal debinding process are modeled. The evaporation of low molecular weight (LMW) component and volatile fragments, the thermal degradation of high molecular weight (HMW) component, the capillary driven and pressure driven liquid phase transports, the binary diffusion in solutions, the convection and diffusion of gas phases, and the heat transfer in a porous medium are captured in the model. The model is validated with experimental data. The simulated results show that mass transfers during the early stage of thermal debinding are mainly due to capillary driven and pressure driven liquid transports. During the final stage of thermal debinding, both convective liquid and gas transports are important in binder removal. The developed model provides physical understanding of binder removal mechanisms that are essential for process optimization.

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KW - Materials processing

KW - Mathematical modeling

KW - Numerical analysis

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