Progress in coal pyrolysis

Solomon, P.R.; Fletcher, Thomas H.; Pugmire, Ronald J.

doi:10.1016/0016-2361(93)90570-r

Cited by 325 publications

(151 citation statements)

References 59 publications

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“…It means that decomposition of LVC is accomplished in broader temperature range and thermal degradation of the studied coal starts at lower temperature (T I =272 °C) and ends at higher temperature (T F =644 °C) than polymers which corresponds with literatures [5,7]. Temperature range for plastic thermal decomposition varies from T I =220 (for ST) to T F =586 °C (for PP) and in this temperature range the highest effect of polymers addition in coal could be occurred [15]. For this reason, synergic effect between polymers and coal was evaluated for temperature range 200 -600 °C.…”

Section: Tabsupporting

confidence: 60%

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

Mikulová¹,

Večeř²,

Frantík³

2012

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Amount of polymer waste increase every year and for this reason upgrading of this waste is a necessity. Nowadays waste disposal and incineration of polymers waste are the most frequently used methods which (i) did not allowed chemical and energy utilization and (ii) are not environmentally friendly. Pyrolysis and co-pyrolysis provide an attractive way to dispose of and convert polymer waste and coal into higher value fuel and the specific benefits of this method potentially include many environmental friendly advantages. Pyrolysis and co-pyrolysis has been studied using termogravimetry apparatus NETZCH TG-DTA STA 409 EP. The pyrolysis of all polymers except for scrap tyres was a one-step process and temperature range was narrower than for coal pyrolysis. The overlapping temperature range for pyrolysis of polymers and coal was 200-600°C. The synergic effect and kinetics of co-pyrolysis of polymers and coal has been studied in the given temperature range. The addition of polymers to coal led to (i) the enhancement of weight loss of brown coal, (ii) the shift of temperature of the max pyrolysis speed and (iii) the slight influence of E A of coal pyrolysis. AbstraktMnožství odpadních polymerů každoročně stoupá a jejich recyklace je velmi důležitá. V dnešní době je největší část těchto odpadů ukládána na skládky nebo spalována. Tyto dvě metody však nejsou příliš vhodné (nedochází k chemickému ani energetickému využití materiálu) a nejsou ani šetrné k životnímu prostředí. Pyrolýza a ko-pyrolýza jsou vhodné recyklační metody umožňující přeměnu odpadních polymerů a uhlí na paliva s vyšším energetickým obsahem a jsou šetrné k životnímu prostředí. Pyrolýza a ko-pyrolýza vybraných polymerních materiálů s hnědým uhlím byla studována pomocí dynamické termogravimetrie na přístroji LECO TG-DTA STA 409 EP firmy NETZCH. Pyrolýza polymerů, kromě odpadních pneumatik, probíhala v jednom stupni a v užším teplotním intervalu než pyrolýza uhlí. Teplotní interval, kdy docházelo k pyrolýze polymeru i uhlí byl 200-600°C. V tomto teplotním intervalu byla rovněž studována kinetika ko-pyrolýzy a synergický efekt studovaných polymerů a hnědého uhlí. Nejvyšší pozitivní synergický efekt vedoucí ke zvýšení hmotnostního úbytku hnědého uhlí a rychlejší pyrolýzy při nižších teplotách měl ze studovaných polymerů polypropylen.

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Section: Tabsupporting

confidence: 60%

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

Mikulová¹,

Večeř²,

Frantík³

2012

TransVSBms

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“…Coal pyrolysis can be considered as a depolymerization reaction during which the weak bonds such as methylene and oxymethylene bridges are broken, resulting in tars that contain structures representative of the parent coals [15].…”

Section: Introductionmentioning

confidence: 99%

Fuel-oils from co-pyrolysis of scrap tyres with coal and a bituminous waste. Influence of oven configuration

Acevedo

Barriocanal

2014

Fuel

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“…9,10,27,[28][29][30][31][32][33][34][35][36][37][38] ). Kok et al 39 and Solomon et al 40 observe that non-isothermal chemical kinetic studies of coal combustion are made difficult by the presence of various complex substances in coals, and due to the high number of consecutive and parallel chemical reactions that take place. On the other side, Prasad et al 29 observe that in isothermal analyses the materials physically change during reaction and suggests that no unique set of kinetic parameters can be derived for the whole process.…”

Section: Introductionmentioning

confidence: 99%

A thermogravimetric analysis of the combustion of a Brazilian mineral coal

Filho¹,

Milioli²

2008

Quím. Nova

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Recebido em 8/3/07; aceito em 11/7/07; publicado na web em 19/12/07Knowledge of coal combustion kinetics is crucial for burner design. This work aims to contribute on this issue by determining the kinetics of a particular Brazilian bituminous coal. Non-isothermal thermogravimetry was applied for determining both the preexponential factor and the activation energy. Coal samples of 10 mg and 775 μm mean size were used in synthetic air atmospheres (21 % O 2 ). Heating rates from 10 to 50 o C/min were applied until the temperature reached 850 o C, which was kept constant until burnout. The activation energy for the primary and the secondary combustion resulted, respectively, in 135.1 kJ/mol and 85.1 kJ/mol.

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Progress in coal pyrolysis

Cited by 325 publications

References 59 publications

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

Fuel-oils from co-pyrolysis of scrap tyres with coal and a bituminous waste. Influence of oven configuration

A thermogravimetric analysis of the combustion of a Brazilian mineral coal

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