A reduced NOx reaction model for pulverized coal combustion under fuel-rich conditions

Taniguchi, Masayuki; Yamamoto, Kenji; Kobayashi, Hironobu; Kiyama, Kenji

doi:10.1016/s0016-2361(01)00167-3

Cited by 40 publications

(34 citation statements)

References 13 publications

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“…Peng et al (2016) discovered that the CO 2 emissions can be reduced by different ways, i.e., water absorption at high pressure, combustion in the presence of calcium oxide, oxy-fuel combustion, and electrical absorption. Among the CO 2 reduction methods cited, oxy-fuel combustion is considered as one of the most important and promissing options for CO 2 sequestration, due to their ability for a significant reduction in the operating costs (Taniguchi et al, 2002). It was known that oxy-fuel combustion of pulverized biomass in O 2 /CO 2 atmosphere can result in an increasing of the char conversion amount and combustion efficiency (Peng et al, 2016;Cruz and Crnkovic, 2016).…”

Section: Features Gasification Combustionmentioning

confidence: 99%

“…It was known that oxy-fuel combustion of pulverized biomass in O 2 /CO 2 atmosphere can result in an increasing of the char conversion amount and combustion efficiency (Peng et al, 2016;Cruz and Crnkovic, 2016). Taniguchi et al (2002) reported that NO x emissions under O 2 /CO 2 atmosphere are about 25% those emitted in air atmosphere. In addition, coal oxy-fuel combustion makes it possible to capture and sequester carbon, using technology already available in conventional pulverized coal boilers, and to capitalize on the enormous quantities of money invested in the existing boilers (Riaza et al, 2012).…”

Section: Features Gasification Combustionmentioning

confidence: 99%

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Application of cassava harvest residues (Manihot esculenta Crantz) in biochemical and thermochemical conversion process for bioenergy purposes: A literature review

Rodrigues¹,

Cruz²,

Souza³

et al. 2018

Afr. J. Biotechnol.

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Bioenergy production from biomass and agricultural wastes has gained significant interest due to rising fossil fuel prices and their decrease in air pollutant emissions. This review paper evaluates the state-of-art for the several applications from cassava harvest residues and their use in bioenergy industry, using different thermochemical and biochemical processes. Regarding the great available literature for this biomass, several pretreatment techniques, including mechanical, chemical, biological, thermal, ultrasonic and wet explosion were observed. The use of cassava harvest residues for the biochemical pretreatments, for example, hydrolysis, fermentation and thermochemical processes, such as direct combustion, gasification, pyrolysis, fast pyrolysis and oxy-fuel combustion was also discussed. Therefore, studies are necessary in order to understand that the use of cassava residues in thermal processes can increase the viability of this feedstock for biofuels production and/or in power co-firing units. After extensive study, it was observed that informations are still lacking about the use of cassava harvest residues in other conversion processes, thus, new studies to discover more on the use of this biomass, in order to extend their application in the bioenergy market is encouraged.

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Section: Features Gasification Combustionmentioning

confidence: 99%

Section: Features Gasification Combustionmentioning

confidence: 99%

Application of cassava harvest residues (Manihot esculenta Crantz) in biochemical and thermochemical conversion process for bioenergy purposes: A literature review

Rodrigues¹,

Cruz²,

Souza³

et al. 2018

Afr. J. Biotechnol.

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“…The NO x reaction submodel proposed by Taniguchi et al (5) was used in this study. The reaction schemes of the submodels are shown in Fig.…”

Section: No X Reaction Submodelmentioning

confidence: 99%

“…As the char in flames had about one mol of hydrogen to eight mols of carbon (5) , hydrocarbon radicals were assumed to be formed from the hydrogen (R8). The reaction route R6 is particularly important for low volatile coal.…”

Section: No X Reaction Submodelmentioning

confidence: 99%

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Validation of Coal Combustion Model by Using Experimental Data of Utility Boilers

Yamamoto

Taniguchi

Kobayashi

et al. 2005

JSME international journal. Ser. B, Fluids and thermal engineer

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Applicability of a coal combustion model was validated by comparing its predictions with experimental data of utility boilers. The coal combustion model had gasification and NO x reaction submodels and it was developed by using a small drop-tube-furnace (coal feed rate 0.6 kg/h). A turbulence combustion simulation program was developed by introducing the coal combustion model. The program was validated by comparing its predictions with 23 sets of experimental results which contained different plant, load and coal data. The temperature difference between simulated and experimental results was within 30• C at the furnace exit. The decreasing characteristic of coal burnout with increasing load was well predicted. The NO x emission difference between simulated and experimental results was less than 15%. The coal combustion model was judged applicable to utility boilers.

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Investigation of NO x precursor compounds and other combustion by-products in the primary combustion zone of a waste-incineration plant using on-line, real-time mass spectrometry and Fourier-transform infrared spectrometry (FTIR)

et al. 2005

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On-line analysis of trace and bulk gas compounds in the burning chamber of a waste-incineration plant has been performed, with high temporal resolution, by use of a variety of distinctly different measurement techniques. Time-of-flight mass spectrometry was performed with simultaneous use of three ionization techniques-resonance-enhanced multiphoton ionization (REMPI), single-photon ionization (SPI), and electron-impact ionization (EI). Chemical-ionization mass spectrometry (CIMS), Fourier-transform infrared spectrometry (FTIR), and electrochemical methods were also used. Sampling was conducted by means of a newly developed air-cooled stainless steel lance, to cope with the high temperatures and elevated particle concentrations at the sampling location. Nitrogen species were mainly nitrogen monoxide, ammonia, and hydrogen cyanide (HCN), with a small amount (approximately 0.3%) of aromatic nitrogen compounds. NO, NH(3), and HCN are the main contributors to the NO(x)-formation process in the postulated fuel-NO reaction scheme dominant at this location. The NO recycling process thereby plays a major role. Changes in plant operating conditions have a noticeable impact only when the air supply is varied. For example, reduction of oxygen leads to an increase in the HCN fraction of the total nitrogen content and a decrease in the NO fraction, and vice versa.

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A reduced NOx reaction model for pulverized coal combustion under fuel-rich conditions

Cited by 40 publications

References 13 publications

Application of cassava harvest residues (Manihot esculenta Crantz) in biochemical and thermochemical conversion process for bioenergy purposes: A literature review

Application of cassava harvest residues (Manihot esculenta Crantz) in biochemical and thermochemical conversion process for bioenergy purposes: A literature review

Validation of Coal Combustion Model by Using Experimental Data of Utility Boilers

Investigation of NO x precursor compounds and other combustion by-products in the primary combustion zone of a waste-incineration plant using on-line, real-time mass spectrometry and Fourier-transform infrared spectrometry (FTIR)

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