Modeling Soot Derived from Pulverized Coal

Brown, Alexander L.; Fletcher, Thomas H.

doi:10.1021/ef9702207

Cited by 81 publications

(65 citation statements)

References 29 publications

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“…However, as shown in Figure 3.11e, the model predictions also highlight some deficiencies in the model because it predicts a non-zero soot number density in regions where the soot mass fraction is zero. This behavior has been previously reported by Brown (1997). In private communications, Fletcher has suggested model modifications that should eliminate this non-physical behavior and lead to a more robust model.…”

Section: Modelingsupporting

confidence: 75%

“…A soot model originally developed by Fletcher [Fletcher et al, 1992], [Brown & Fletcher, 1998] has been implemented into REI's two phase combustion CFD code GLACIER. In this model, it is assumed that coal soot forms only from tar.…”

Section: Modelingmentioning

confidence: 99%

“…In this model, it is assumed that coal soot forms only from tar. The model is comprised of three transport equations for tar mass fraction, soot volume/mass fraction, and soot number density [Brown & Fletcher, 1998]. Tar evolution is calculated from the Lagrangian particle phase equations that use the CPD model to determine devolatilization rates and tar yields [Fletcher et al, 1992].…”

Section: Modelingmentioning

confidence: 99%

See 2 more Smart Citations

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

Bockelie¹,

Cremer²,

Davis³

et al. 2001

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This is the third Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NOx control strategies and their possible impact on boiler performance for firing US coals. The Electric Power Research Institute (EPRI) is providing cofunding for this program. This program contains multiple tasks and good progress is being made on all fronts. A Rich Reagent Injection (RRI) design has been developed for a cyclone fired utility boiler in which a field test of RRI will be performed later this year. Initial evaluations of RRI for PC fired boilers have been performed. Calibration tests have been developed for a corrosion probe to monitor waterwall wastage. Preliminary tests have been performed for a soot model within a boiler simulation program. Shakedown tests have been completed for test equipment and procedures that will be used to measure soot generation in a pilot scale test furnace. In addition, an initial set of controlled experiments for ammonia adsorption onto fly ash in the presence of sulfur have been performed that indicates the sulfur does enhance ammonia uptake.

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Section: Modelingsupporting

confidence: 75%

Section: Modelingmentioning

confidence: 99%

Section: Modelingmentioning

confidence: 99%

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NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

Bockelie¹,

Cremer²,

Davis³

et al. 2001

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show abstract

“…In order to further investigate the detailed particle devolatilization behavior and predict the scaling-up performance to a 5 MW reactor, Yan et al [53] thereafter improved the work of Chen and Cheng [50] by considering the above particle heat transfer mechanisms [49] in the CFD-discrete phase model (CFD-DPM), together with the improved CPD model and the tar cracking reactions [54,55] . The improved CFD-DPM model was validated with the experimental data reported by Baumann et al [27] .…”

Section: Cleaner Production Of Acetylene By Coal Pyrolysis In Thermalmentioning

confidence: 99%

China goes green: cleaner production of chemicals

Yan¹,

Lu²,

Cheng³

2012

Green Processing and Synthesis

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The effort that China is making for cleaner production of chemicals especially based on technology innovations of green processing and synthesizing methods, is reviewed. An example is the rapidly expanding chlor-alkali industry in China, which manufactures a large volume of products of caustic soda, polyvinyl chloride (PVC), etc. With a distinct difference from conventional technologies, a series of novel processes are under investigation, both in academic research and in industrial demonstrations, such as clean coal conversion to acetylene using thermal plasma, mercury free catalysis to synthesize vinyl chloride monomer (VCM) and a plasma-assisted gas-solid contacting process to make chlorinated PVC (CPVC). All efforts are directed to improving the process effi ciency, saving the materials and energy cost, and accordingly to reducing the emission/disposal of waste gases, liquids and solid residues. We try to address the signifi cance of technology innovations to drive the industry reformation, in order to fully update the outdated processes with heavy pollution and energy consumption, to the state of the art green process and synthesis techniques.

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“…Simulation of the L1500 (4.5 MMBtu) pilot scale test furnace at the University of Utah Combustion Research Laboratory was performed using a soot model originally developed by Fletcher [Fletcher et al, 1992], [Brown & Fletcher, 1998] which was implemented into REI's two phase combustion CFD code GLACIER. To better simulate l ow NOx firing conditions, staging air is introduced further downstream from the burner than has been used in previous simulations reported for this project.…”

Section: Task 32 Sootmentioning

confidence: 99%

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

Bockelie¹,

Cremer²,

Davis³

et al. 2001

View full text Add to dashboard Cite

This is the fifth Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NOx control strategies and their possible impact on boiler performance for firing US coals. The Electric Power Research Institute (EPRI) is providing cofunding for this program. This program contains multiple tasks and good progress is being made on all fronts. Field tests for NOx reduction in a cyclone fired utility boiler due to using Rich Reagent Injection (RRI) have been started. CFD modeling studies have been started to evaluate the use of RRI for NOx reduction in a corner fired utility boiler using pulverized coal. Field tests of a corrosion monitor to measure waterwall wastage in a utility boiler have been completed. Computational studies to evaluate a soot model within a boiler simulation program are continuing. Research to evaluate SCR catalyst performance has started. A literature survey was completed. Experiments have been outlined and two flow reactor systems have been designed and are under construction. Commercial catalyst vendors have been contacted about supplying catalyst samples. Several sets of new experiments have been performed to investigate ammonia removal processes and mechanisms for fly ash. Work has focused on a promising class of processes in which ammonia is destroyed by strong oxidizing agents at ambient temperature during semi-dry processing (the use of moisture amounts less than 5 wt-%). Both ozone and an ozone/peroxide combination have been used to treat both basic and acidic ammonia-laden ashes.

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Modeling Soot Derived from Pulverized Coal

Cited by 81 publications

References 29 publications

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

China goes green: cleaner production of chemicals

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS

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