Numerical simulation of coal gasification in entrained flow coal gasifier

Watanabe, Hiroaki; Otaka, Maromu

doi:10.1016/j.fuel.2006.02.002

Cited by 343 publications

(176 citation statements)

References 8 publications

Supporting

Mentioning

167

Contrasting

Order By: Relevance

“…Here all the kinetic parameters of the equations (1)- (10), pre-exponential factor, activation energy and temperature exponent, are referred to in Watanabe and Otaka [4].…”

Section: Cfd Models and Analysis Methodsmentioning

confidence: 99%

“…The main objectives of coal gasification research has focused on how to convert coal energy into syngas energy as much as possible through the design of a coal gasifier. Because coal and oxidizer feed conditions severely affect coal gasification efficiency, many previous coal gasification research investigated various nozzle designs with axial, swirling, opposing or staged flow types [2][3][4][5]. In Korea, a new coal gasifier has been developed through the test-bed facility of a 300MW IGCC power plant since 2010.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimal design of the oxidizer nozzles of a coal gasifier using the CFD method

Lee¹,

Lee²,

Lee³

et al. 2016

WIT Transactions on Engineering Sciences

View full text Add to dashboard Cite

The present study optimizes the oxidizer feed nozzles of a coal gasifier by using a computational fluid dynamics (CFD) technique. The CFD model on coal gasification is constructed by combining Reynolds stress averaged NavierStokes equation solver, turbulence, discrete phase and gasification reaction kinetic models. With the changes of nozzle size and oxidizer feed distribution of the coal gasifier, coal gasification performances are calculated by the present CFD method. From the CFD calculation results, the optimal design conditions of oxidizer nozzles can be obtained to maximize carbon conversion and cold gas efficiency by up to 97% and 82% respectively.

show abstract

“…Here all the kinetic parameters of the equations (1)- (10), pre-exponential factor, activation energy and temperature exponent, are referred to in Watanabe and Otaka [4].…”

Section: Cfd Models and Analysis Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal design of the oxidizer nozzles of a coal gasifier using the CFD method

Lee¹,

Lee²,

Lee³

et al. 2016

WIT Transactions on Engineering Sciences

View full text Add to dashboard Cite

show abstract

“…Viscosity turbulence model for fluid flow is expressed by the relation (Ajilkumar et al, 2008;Fluent, 2009;Jaworski, 2005;Silaen et al, 2009;Watanabe et al, 2006):…”

Section: Turbulence Modellingmentioning

confidence: 99%

Modelling Test of Autothermal Gasification Process Using CFD

Janoszek

Stańczyk

Smoliński

2017

Archives of Mining Sciences

View full text Add to dashboard Cite

There are many complex physical and chemical processes, which take place among the most notable are the chemical reactions, mass and energy transport, and phase transitions. The process itself takes place in a block of coal, which properties are variable and not always easy to determine in the whole volume. The complexity of the phenomena results in the need for a construction of a complex model in order to study the process on the basis of simulation.In the present study attempts to develop a numerical model of the fixed bed coal gasification process in homogeneous solid block with a given geometry were mode. On the basis of analysis and description of the underground coal gasification simulated in the ex-situ experiment, a numerical model of the coal gasification process was developed. The model was implemented with the use of computational fluid dynamic CFD methods. Simulations were conducted using commercial numerical CFD code and the results were verified with the experimental data. Keywords:Computational fluid dynamics (CFD), coal gasification process, numerical modelling W trakcie zgazowania węgla zachodzi wiele złożonych procesów fizykochemicznych, spośród których do najważniejszych można zaliczyć reakcje chemiczne, transport masy i energii oraz przemiany fazowe. Sam proces przebiega w bloku węgla, której właściwości są zmienne i nie zawsze łatwe do określenia w całej objętości. Złożoność zjawisk powoduje, że badanie procesu na podstawie symulacji wymaga skonstruowania złożonego modelu.W pracy podjęto próbę opracowania modelu numerycznego zgazowania węgla zachodzącego złożu jednorodnym o zadanej geometrii. Na podstawie dokonanych analiz oraz opisu eksperymentu zgazowania węgla przeprowadzanego w reaktorze doświadczalnym ex-situ, w której symulowano warunki PZW, został opracowany model zachodzących procesów. Model został zaimplementowany z wykorzystaniem

show abstract

“…Ó Ô Õ ; ; Ö ×Ö ; aeØ ÓÓ ÙÚ §Û §ÛÜ_YÛÝÞßb5àYÛáâãCaÛÂPM äå ae Õ < ae = å åçèéêëì« íîï ð ñÕ ae ae ò ae Ô å < ae ae ó Õ î < ôõ ö ÷ ð ø õ ùõ ú õ ø ö ûü ý ö ôü < þ ff õ 0 ff 1 2 Fig. 11 Schematic of two-stage entrain-flow coal gasifier and chemical reactions [15,16]. Fig.…”

mentioning

confidence: 99%

“…Fig. 12 Comparison of temperature and HHV of product gas between numerical simulation and experiment [15,16]. Fig.…”

mentioning

confidence: 99%