Thermochemical and combustion behaviors of coals of different ranks and their blends for pulverized-coal combustion

Moon, Cheoreon; Sung, Youl-Moon; Ahn, Seongyool; Kim, Tae‐Kyung; Choi, Gyung‐Min; Kim, Duckjool

doi:10.1016/j.applthermaleng.2013.01.009

Cited by 97 publications

(36 citation statements)

References 32 publications

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“…The TG curves shifted toward the high temperature region and the entire coal combustion process was delayed because of the change in coal rank [33], as shown in Fig. 4.…”

Section: Influence Of Upgrading On Coal Combustionmentioning

confidence: 91%

Influence of the hydrothermal dewatering on the combustion characteristics of Chinese low-rank coals

Zhang

et al. 2015

Applied Thermal Engineering

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“…The TG curves shifted toward the high temperature region and the entire coal combustion process was delayed because of the change in coal rank [33], as shown in Fig. 4.…”

Section: Influence Of Upgrading On Coal Combustionmentioning

confidence: 91%

Influence of the hydrothermal dewatering on the combustion characteristics of Chinese low-rank coals

Zhang

et al. 2015

Applied Thermal Engineering

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“…Ignition temperature corresponds to the Tig of the volatile matter. Tig is an important characteristic of combustion, especially for low-rank coal due to its high intensity of spontaneous combustion (Moon et al, 2013).…”

Section: Fc =100 -(M % + a % + Vm %)mentioning

confidence: 99%

Study on combustion characteristics of coal-biomass for co-firing system as a feedstock of coal gasification process

Umar

Hudaya

Sulistyohadi

2017

IMJ

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Biomass co-firing is recognised as a crucial technology to aid in the use of fossil fuels, particularly due to its relative ease of implementation. Many studies of the combustion processes associated with cofiring have been conducted elsewhere. This paper discusses the combustion characteristics of coal and torrefied biomasses. Combustion profiles can be used to study certain combustion properties of fuels and fuel blends. The biomass fuels utilized in this study include twig, trunk and weed as the wastes from tea plantation. The results of this work provide data concerning the combustion processes of co-firing determined by simultaneous thermal analysis (STA) methods. Simultaneous thermogravimetric & differential scanning calorimetry/differential thermal analysis (STA, TGA-DSC/DTA) measures both the heat flow (DSC) and the weight changes (TG) in a material as a function of temperature or time in a controlled atmosphere. The results indicate that the mixture of coal and torrefied trunk in the weight ratio of coal-trunk of 25:75 shows the best combustion performance compared to other compositions of coal -torrefied biomass.Keywords: coal, biomass, co-firing, torrefaction, combustion Kata kunci: batubara, biomasa, pembakaran bersama, pengarangan, pembakaran. ABSTRAK Sistem pembakaran bersama (co-firing) diakui sebagai teknologi yang dapat membantu dalam membatasi penggunaan bahan bakar fosil, terutama karena mudah untuk diimplementasikan. Beberapa studi tentang proses pembakaran terkait dengan pembakaran bersama ini telah banyak dilakukan. Makalah ini membahas karakteristik pembakaran batubara dan biomasa yang telah mengalami proses pengarangan (torrefaction). Profil pembakaran dapat digunakan untuk mempelajari

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“…In contrast, the addition of kaolin representing non-swelling clays did not lead to a rapid increase. Kaolinite, Al 2 Si 2 O 5 (OH) 4 , typically consists of 14-42% on mineral matter basis, while montmorillonite, a key constituent of bentonite with a chemical formular of (Ca,Na) 0.3 (Al,Mg,Fe) 2 Si 4 O 10 (OH) 2 .nH 2 O is about 0-4% [17]. Although not presented here, the mineral matter composition of the tested coals was analyzed by the X-ray diffraction method.…”

Section: Relationship Between Cohesion Strength and Coal Propertiesmentioning

confidence: 99%

“…Due to the large variation between coals, promptly analyzing detailed fuel properties has become crucial for the stable operation of power plants. In terms of the boiler, important fuel properties include the combustion and ash slagging/fouling characteristics of individual coals and their blends [3] [4]. For the handling and pre-processing of coals, self-heating propensity and cohesion properties are crucial [5] [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Cohesion Properties for Various Coals

Kim¹,

Lee²,

Ryu³

et al. 2016

KEPCO Journal on Electric Power and Energy

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Assessing the handling properties of coal becomes a major issue for the operation of a fuel supply system in power plants, due to the increased types of coal imported into Korea. In this study, the cohesion strengths of 13 bituminous and sub-bituminous coals from different countries were tested by measuring the amount of force that leads to a failure of consolidated particles. The particle size was in the range of 0.1-2.8 mm, which represents the coarse particles before pulverization. While the cohesion strength was proportional to the compression force in the tested range, the effects of the surface moisture content and the weight fraction of fines were crucial for cohesive coals. At fixed conditions of surface moisture and particle size, large variations were found in the cohesion propensity between coals. For coals of 0.1-0.5 mm with the moisture added close to the critical value, cohesive coals had the density over 900 kg/m 3 after consolidation. The cohesion propensity was not correlated with the basic properties of coals with sufficient statistical significance.

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Thermochemical and combustion behaviors of coals of different ranks and their blends for pulverized-coal combustion

Cited by 97 publications

References 32 publications

Influence of the hydrothermal dewatering on the combustion characteristics of Chinese low-rank coals

Influence of the hydrothermal dewatering on the combustion characteristics of Chinese low-rank coals

Study on combustion characteristics of coal-biomass for co-firing system as a feedstock of coal gasification process

Experimental Evaluation of Cohesion Properties for Various Coals

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