Combustion kinetics and the heterogeneous ignition of pulverized coal

Wall, Terry; Gururajan, V.S.

doi:10.1016/0010-2180(86)90087-8

Cited by 39 publications

(14 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The question may be asked as to whether a momentum balance is necessary to model in-flight uptake. Scala et al (10) found that assuming a stationary boundary layer resulted in no more than 10 % error into the results and for that reason a similar assumption is made in this model.…”

Section: Rate Modelsmentioning

confidence: 97%

“…Over the last decade, there have been numerous studies of coal particle ignition mechanisms [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Essenhigh et al [8] completed a classical review on coal particle ignition mechanisms in 1980.…”

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

“…The heterogeneous mechanism neglects the influence of volatile matter and depends on heat generation by combustion on the coal surface (either externally or internally), whereas the homogeneous mechanism involves the combustion of evolved volatile matter in the vicinity of the particle with its heating by conduction from the volatile flame. [11] Wall and Gururajan [10,11 ] applied analyses of both heterogeneous and homogenous mechanisms to data obtained in their study and showed that:…”

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

“…Essenhigh et al [8] completed a classical review on coal particle ignition mechanisms in 1980. Both homogenous, gas phase ignition(GI), and heterogeneous (HI) mechanisms have been proposed to describe the ignition process [8][9][10][11][12][13][14][15]. The greatest controversy lies on which mechanism is controlling: devolatilization followed by gas phase ignition (first proposed by Faraday) or gas/solid reaction (whole coal ignition).…”

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

“…2. Analysis of the ignition temperature data (at temperatures ranging from 650K-1200K and particle sizes less than 500 ) to determine the reactivity of coal or char, requires a) the assumption of heterogeneous ignition, b) an assumption on the nature of the product of combustion (generally CO 2 rather than CO), and c) the reaction order with respect to oxygen (if experiments were not preformed over a range of oxygen partial pressures) [10]. 3.…”

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

See 4 more Smart Citations

Clean Coal Program Research Activities

Baxter¹,

Eddings²,

Fletcher³

et al. 2009

View full text Add to dashboard Cite

Although remarkable progress has been made in developing technologies for the clean and efficient utilization of coal, the biggest challenge in the utilization of coal is still the protection of the environment. Specifically, electric utilities face increasingly stringent restriction on the emissions of NO x and SO x , new mercury emission standards, and mounting pressure for the mitigation of CO 2 emissions, an environmental challenge that is greater than any they have previously faced. The Utah Clean Coal Program addressed issues related to innovations for existing power plants including retrofit technologies for carbon capture and sequestration (CCS) or green field plants with CCS.The Program focused on the following areas: simulation, mercury control, oxycoal combustion, gasification, sequestration, chemical looping combustion, materials investigations and student research experiences. The goal of this program was to begin to integrate the experimental and simulation activities and to partner with NETL researchers to integrate the Program's results with those at NETL, using simulation as the vehicle for integration and innovation. The investigators also committed to training students in coal utilization technology tuned to the environmental constraints that we face in the future; to this end the Program supported approximately 12 graduate students toward the completion of their graduate degree in addition to numerous undergraduate students. With the increased importance of coal for energy independence, training of graduate and undergraduate students in the development of new technologies is critical.ii

show abstract

Section: Rate Modelsmentioning

confidence: 97%

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

Section: Single Coal Particle Ignition Mechanismmentioning

confidence: 99%

See 3 more Smart Citations

Clean Coal Program Research Activities

Baxter¹,

Eddings²,

Fletcher³

et al. 2009

View full text Add to dashboard Cite

show abstract

Combustion kinetic parameters of thai lignite char

Wongvicha

Bhattacharya

1994

Int. J. Energy Res.

View full text Add to dashboard Cite

Kinetic parameters, the pre‐exponential factor and the activation energy, of two Thai lignite char of different ash contents and electrode carbon have been experimentally determined based on the Semenov's thermal ignition theory adapted to single particle ignition. Combustion rate constants obtained have been comparatively plotted with those from Field's correlation (1969). Results indicated that the reaction rate coefficient for lignite char approaches value estimated from Field's equation at temperature about 850°C.

show abstract

Investigation on the Transient Enthalpy of Coal Combustion

Wang

et al. 2012

Cleaner Combustion and Sustainable World

View full text Add to dashboard Cite

Combustion kinetics and the heterogeneous ignition of pulverized coal

Cited by 39 publications

References 10 publications

Clean Coal Program Research Activities

Clean Coal Program Research Activities

Combustion kinetic parameters of thai lignite char

Investigation on the Transient Enthalpy of Coal Combustion

Contact Info

Product

Resources

About