Carbon-Steam Reaction Kinetics from Pilot Plant Data

May, W. G.; Mueller, Roger; Sweetser, Sumner B.

doi:10.1021/ie50585a038

Cited by 14 publications

(9 citation statements)

References 2 publications

(2 reference statements)

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“…Carbon dioxide, which appears late in experiments above 1150°a nd throughout experiments at 1040°, must result from the shift reaction 2. May et al (1958) suggest that the forward rate of the shift reaction is slower than the carbonsteam reaction rate and decreases with temperature. The equilibrium constant for the shift reaction 2 also decreases with temperature (Lowry, 1963).…”

Section: Discussion Of the Carbon-steam Reactionmentioning

confidence: 97%

The Kinetics of Gasification of Carbon Contained in Coal Minerals at Atmospheric Pressure

Jensen¹

1975

Ind. Eng. Chem. Proc. Des. Dev.

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Section: Discussion Of the Carbon-steam Reactionmentioning

confidence: 97%

The Kinetics of Gasification of Carbon Contained in Coal Minerals at Atmospheric Pressure

Jensen¹

1975

Ind. Eng. Chem. Proc. Des. Dev.

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“…0196-4313/81/1020-0006301.00/0 May et al (1958) studied coke gasification in fluidized and fixed beds and presented correlations for design purposes. They derived rate constants from the results on the fixed-bed reactor with the assumption of plug flow.…”

Section: Introductionmentioning

confidence: 99%

Study of kinetics of carbon gasification reactions

Katta¹,

Keairns²

1981

Ind. Eng. Chem. Fund.

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The rates of carbon-steam (C-H20) and carbon-carbon dioxide (C-C02) reactions were studied in a laboratory fluidized bed with coke breeze over a temperature range of 920 to 1040 °C at 1013 kPa. Rate equations suggested by a simplification of the Langmuir-Hinshelwood rate expression and also Ergun's model for a fully back-mixed fluidized bed were developed for both reactions, with rate as a function of temperature and gas composition. The success of these equations in fitting gasification results affords some support for Ergun's model but not In all details, and no attempt is made to prove the detailed mechanisms for the reactions In the present study. The reaction rate was found to be independent of the particle size and the inert gas concentration. The variation of the reaction rate with carbon conversion was also studied. This study forms a basis for interpreting char reactivities to be used in projecting plant performance within the range of experimental conditions studied here.

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“…Squires (1961) analyzed the gasification data obtained by May et al (1958) and discussed the difference between the gasification rate observed in the fixed bed and that in the fluidized bed. He stated that the intensive solid circulation between the oxidizing and the reducing zones in the fluidized bed gasifier might increase the reactivity of the surface of the carbon particles, and this effect might be more clearly observed as the reaction temperature increases.…”

Section: Resultsmentioning

confidence: 99%

Study of char gasification by carbon dioxide. 2. Continuous gasification in fluidized bed

Matsui¹,

Kojima²,

Kunii³

et al. 1987

Ind. Eng. Chem. Res.

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Coal char gasification with carbon dioxide was performed in a fludized bed. The continuous pyrolysis of the char was carried out in the nitrogen stream to evaluate the amount of gas produced by thermal decomposition. The gasification reaction was analyzed by assuming the reaction takes place independently after the pyrolysis is completed. The bubble size under the gasification condition was measured by use of the electroresistivity probe. The bubbling bed model and the thermogravimetrically obtained rate equation were used for the prediction of the conversions of both char and carbon dioxide, where the bubbling bed model was modified to give the stoichiometrically consistent material balance between the consumed char and carbon dioxide. The results of the fluidized bed gasification could be well explained by the modified bubbling bed model, where the effective bubble size was chosen as the bubble size observed at the middle height of the bed by the electroresistivity probe.

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Carbon-Steam Reaction Kinetics from Pilot Plant Data

Cited by 14 publications

References 2 publications

The Kinetics of Gasification of Carbon Contained in Coal Minerals at Atmospheric Pressure

The Kinetics of Gasification of Carbon Contained in Coal Minerals at Atmospheric Pressure

Study of kinetics of carbon gasification reactions

Study of char gasification by carbon dioxide. 2. Continuous gasification in fluidized bed

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