Prediction of coal reactivity during combustion and gasification by using petrographic data

Furimsky, Edward; Palmer, Allan D.; Kalkreuth, W.; Cameron, A R; Kovacik, G.

doi:10.1016/0378-3820(90)90101-w

Cited by 50 publications

(19 citation statements)

References 5 publications

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“…The role of different petrographic components on the combustion behaviour has been long acknowledged and numerous research efforts have been made in this direction (Jones et al, 1985;Oka et al, 1987;Crelling et al, 1988;Furimsky et al, 1990;Cloke and Lester, 1994;Chaudhuri et al, 1999Chaudhuri et al, -2000. The inertinites, once considered to be less reactive, have also shown good burning characteristics, particularly for the highinertinite Gondwana coals.…”

Section: Introductionmentioning

confidence: 99%

Influence of rank and macerals on the burnout behaviour of pulverized Indian coal

Choudhury

Biswas

Sarkar

et al. 2008

International Journal of Coal Geology

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Section: Introductionmentioning

confidence: 99%

Influence of rank and macerals on the burnout behaviour of pulverized Indian coal

Choudhury

Biswas

Sarkar

et al. 2008

International Journal of Coal Geology

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“…According to Shibaoka et al [59], Gondwana's coals contained more low-reflection inertinites than European ones, which, on the other hand, were rich in high-reflection inertinite. Furimsky et al [60] define reactive macerals as the sum of liptinite and vitrinite as well as one-third of the semifusinite content. According to Thomas et al [61], inertinites occurring in coals from the Southern Hemisphere, which contains more than 40-50% of the inertinites, may be 90% more reactive, so the assumption made by Furminski et al [60] concerning the 30% reactivity of semifusinite may lead to erroneous results.…”

Section: Discussionmentioning

confidence: 99%

Ignition Studies on High-Vitrinite and High-Inertinite Coals Using TGA/DSC, DTIF, EFR, and 20 L Dust Explosive Chamber

2021

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The aim of this work was to study the ignition behaviour of eight coals of different coal ranks, petrographic compositions, and places of origin. The research allows us to gain deeper insight into the ignition mechanism and the relationship between certain properties of coals and their behaviour during ignition. The methodology utilised standard fuel ASTM data, petrographic analysis, pyrolysis and oxidation reactivity, and ignition characteristics generated through lab-scale tests using various ignition measurement methods. The results show that, in the dust explosion, a homogeneous ignition of coal dust took place. The ignition potential was the highest for coals with a high content of liptinites and a low content of inertinites. The ranking of coals in terms of ignition potential under these conditions can be determined on the basis of the measurements of the devolatilization rate. During the combustion of coal dust in TGA/DSC, a dust cloud, and a pulverised fuel stream, the ignition of particles was performed according to a heterogeneous mechanism. The study showed that the reflectance index may be the most reliable method of predicting and comparing ignition temperatures of both vitrinite-rich and inertinite-rich coals. Due to the lack of regularity in the ignition temperatures of some coals, depending on the proportion of inertinites, the petrographic composition of coal cannot be used to predict ignition temperatures during the combustion of coal dust. The ranking of the coals according to their ignition potential can be determined using TGA/DSC.

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“…In addition, the petrofactor, which allowed establishing a more general relationship between coal properties and the reactivity, was also calculated. Petrofactor was calculated using formula (2) (Furimsky et al 1990):…”

Section: Samples Petrography Proximate and Ultimate Analysesmentioning

confidence: 99%

The suitability of Polish lignite for gasification

Bielowicz

2019

Clean Techn Environ Policy

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The article discusses the impact of the lithotype of lignite on the suitability for gasification in CO 2 atmosphere. The research was aimed at determining the influence of lithotype, petrographic composition, and physical and chemical properties of coal on the composition and release of syngas. The examined coals were humic coals. The first step was to determine the impact of lithotype on the degree of carbon conversion at a temperature of up to 815 °C. The gasification process was conducted in the temperature range of 600-1100 °C. During the experiment, two gas samples, used for determining the chemical content of gas, were collected at 950 and 1050 °C, respectively. What is more, continuous monitoring of the gas density during the gasification was carried out. Depending on the lithotype, the content of ash, moisture, and the degree of coalification, the intensity of gas release is different for different temperatures. In addition, it has been found that coals with a high content of poorly gelified xylite and a low ash content are the fastest reacting and the most responsive. The importance of this research lies in determining that the gasification of coal with a low degree of coalification requires technologies carried out at reactor temperatures above 1000 °C.

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Prediction of coal reactivity during combustion and gasification by using petrographic data

Cited by 50 publications

References 5 publications

Influence of rank and macerals on the burnout behaviour of pulverized Indian coal

Influence of rank and macerals on the burnout behaviour of pulverized Indian coal

Ignition Studies on High-Vitrinite and High-Inertinite Coals Using TGA/DSC, DTIF, EFR, and 20 L Dust Explosive Chamber

The suitability of Polish lignite for gasification

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