Spouted bed gasification of western canadian coals

Foong, See Kit; Cheng, G.; Watkinson, A. P.

doi:10.1002/cjce.5450590511

Cited by 40 publications

(22 citation statements)

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“…higher than for coal of 0.5-1 .O mm. This qualitative relation, that for larger particles the gas is stronger, is in agreement with the experiments of Foong et al (1981) in spouted beds and of Franke and Pattas (1979) in fluidised beds.…”

Section: The Results Of Experimentssupporting

confidence: 91%

The influence of geometrical factors and feedstock on gasification in a high temperature fluidised bed

et al. 1987

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Results are presented for gasification of coal and char by means of air or air‐steam mixtures in fluidised bed reactors of three different volumes. Two sizes of coal feedstock particles, 0.5‐1.0 mm and 1.0‐1.5 mm, and one size of char particles, 0.5‐1.5 mm, were used. The calorific value of generated gas and the carbon conversion are presented as a function of particle residence time. For coal gasification higher carbon conversion has been obtained at the same particle residence time than for char gasification. For the steam gasification, a lower gas heating value of about 4 MJ/m3 (S.T.P.) was obtained.

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Section: The Results Of Experimentssupporting

confidence: 91%

The influence of geometrical factors and feedstock on gasification in a high temperature fluidised bed

et al. 1987

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“…Detailed descriptions are given elsewhere (Foong et al, 1981) and only a brief description will be persented here. Detailed descriptions are given elsewhere (Foong et al, 1981) and only a brief description will be persented here.…”

Section: Methodsmentioning

confidence: 99%

Gas composition and temperature profiles in a spouted bed coal gasifier

1986

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Verification of scale-up models of the spouted bed gasifier requires experimental gas composition and temperature profiles within the reactor. Radial and axial profiles are presented for key gaseous species in a 0.30-m. dia. atmospheric pressure gasifier fed at about 30 kg coal/h. Low calorific value gases were generated at air/coal mass ratios of 2.87-4.08, while medium calorific value gases were produced at an oxygen/coal mass ratio of 0.84 and steam/coal ratios of 2.23-2.84. The combustion zone within the gasifier is delineated and the effects of operating conditions on gas composition and temperature profiles are illustrated for typical sub-bituminous and bituminous coals. Recycle of char to the bed from the primary cyclone and bed depth show little effect on profile shape. La vkrification de moddes de niise a I'Cchelle pour un gazkificateur en lit "spoute" requiert des profils de composition du gaz et de temperature a I'intCrieur du rkacteur. On presente des profils radiaux et axiaux pour les composes gazeux importants, dans un gazeificateur de 0.30 m de diamktre, sous la pression atmospherique, et aliment6 a raison d'environ 30 kg/h de charbon. Des gaz de faibles pouvoirs calorifiques ont CtC produits pour des rapports massiques air/charbon de 2.87 a 4.08, tandis que des gaz de pouvoirs calorifiques moyens ont CtC produits a un rapport massique air/charbon de 0.84 et a des rapports vapeur d'eau/charbon de 2.23 a 2.84. On a pu dtlimiter la zone de combustion a I'interieur du gazeificateur et illustrer les effets des conditions operatoires sur les profils de composition du gaz et de temperature dans le cas de charbons sous-bitumineux et bitumineux typiqucs. Le recyclage vers le lit du charbon calcine provenant du cyclone primaire ainsi que la profondeur du lit n'ont que peu d'effets sur la forme des profils.he spouted bed coal gasifier has been under devel-

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“…A comparison of the gasification performance is given in Figure 1 1, where the carbon conversion and cold gas thermal efficiency in the jet-spouted bed, fixed bed, fluidized bed and entrained bed gasifiers are shown. Data for all processes are from commercial or laboratory-scale units (Fujinami et al, 1988).…”

Section: Comparison Of Gasification Performancementioning

confidence: 99%

“…Although each reactor has its own advantage (Foong et al, 1980), there is a common limitation in gasification temperature to avoid incurring ash clinkering troubles. This limitation results in a lower performance of these gasifiers than that of an entrained bed gasifier operated in the wet ash mode (Fujinami et al, 1988).…”

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confidence: 99%

Coal gasification in a jet‐spouted bed

Tsuji

Uemaki

1994

Can J Chem Eng

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Coal gasification has been studied for the production of synthesis gas by use of a laboratory‐scale, two‐stage, jet‐spouted bed reactor. Tests were conducted in the dry ash mode with oxygen‐steam mixtures. The effects of operating conditions on the gasification performance were investigated at atmospheric pressure and temperatures up to 1150°C. Carbon conversions of 75% to 97% and cold gas thermal efficiencies of 62 to 78% were obtained for Taiheiyo coal. Both the carbon conversion and thermal efficiency were mainly affected by the oxygen/coal ratio. The product gases contained 36‐41% hydrogen and 30‐43% carbon monoxide.

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Spouted bed gasification of western canadian coals

Cited by 40 publications

References 1 publication

The influence of geometrical factors and feedstock on gasification in a high temperature fluidised bed

The influence of geometrical factors and feedstock on gasification in a high temperature fluidised bed

Gas composition and temperature profiles in a spouted bed coal gasifier

Coal gasification in a jet‐spouted bed

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