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Cited by 58 publications
(71 citation statements)
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“…However, furnaces that burn low-quality coal with low volatile content are undesirable because low-NO x burners induce an increase in unburned carbon and lower furnace efficiency even if NO x emissions are reduced. A recent study by Hitachi Ltd. analyzed the relation between coal burnout and NO x emissions in a fuel-rich coal flame and found that unburned carbon linearly increases with a decrease in NO x emissions [3,4]. Consequently, maintaining high combustion efficiency in low-NO x burners, especially with frequent changes in coal quality, is important in the design and operation of pulverized coal furnaces.…”
Section: Introductionmentioning
confidence: 99%
“…However, furnaces that burn low-quality coal with low volatile content are undesirable because low-NO x burners induce an increase in unburned carbon and lower furnace efficiency even if NO x emissions are reduced. A recent study by Hitachi Ltd. analyzed the relation between coal burnout and NO x emissions in a fuel-rich coal flame and found that unburned carbon linearly increases with a decrease in NO x emissions [3,4]. Consequently, maintaining high combustion efficiency in low-NO x burners, especially with frequent changes in coal quality, is important in the design and operation of pulverized coal furnaces.…”
Section: Introductionmentioning
confidence: 99%
“…In contrast, our previous paper shows the role of CO 2 was to advance CH 4 oxidation during fuel-rich O 2 /CO 2 combustion where the concentrations of reactants were high because R3 became insignificant under fuel-rich condition, and R1 produced an abundance of OH radicals that were more active than the H radicals in hydrocarbon reactions in the specific temperature range (12,13) . In addition to this, the total hydrocarbon in oxy-fuel coal combustion was lower than that in air combustion in some literature (1,2) . Therefore, further investigations are needed in hydrocarbon oxidation process under O 2 /CO 2 environments.…”
Section: Journal Of Thermal Science and Technologymentioning
confidence: 99%
“…typically coal, a large part of the fuel conversion occurs in the gas phase, and hydrocarbon oxidation plays an important role in combustion process (1)(2)(3)(4) . CH 4 is not only a natural gas component but also one of the major volatile matter released from coal.…”
Section: Journal Of Thermal Science and Technologymentioning
confidence: 99%
“…However, boiler design and development cannot be done efficiently if it is necessary to change the method of NO x reduction for each coal property. In a previous study, we proposed an index to estimate NO x reduction performance [5]. This index has hardly any influence from the burning conditions.…”
Section: Introductionmentioning
confidence: 99%
“…While studies on NO x reduction by char [16][17][18][19] have been made, the contribution for total NO x emission from the pulverized coal combustion was not clear. In previous studies, we proposed a NO x reaction model which focused on the gas phase reaction in the char combustion region [5,15]. A key reaction was reduction of NO x by hydrocarbons.…”
Section: Introductionmentioning
confidence: 99%