Results 171 to 180 of about 101,799 (216)

Solar char gasification

Proceedings of the 24th Intersociety Energy Conversion Engineering Conference, 2003
The potential application of high-temperature solar heat for the production of synthesis gas from char has been investigated. Indirect transfer of solar heat, simulated by an electric furnace, to a bench-scale fluidized bed reactor has been examined, the fluidizing gas being the heat-carrying medium.
S. Chaudhary, V.K. Mathur
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Noncatalytic coal char gasification

AIChE Journal, 1984
AbstractA simple particle model is used to interpret differential thermogravimetric data taken on the gasification of coal/char with CO2, H2 and H2O. The model takes into account the major physical factors which influence the gasification rate, viz., the changing magnitudes of surface area, porosity, activation energy and effective diffusivity during ...
Sunggyu Lee, J. C. Angus, R. V. Edwards, N. C. Gardner   +3 more
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Modeling of catalytic char gasification

Industrial & Engineering Chemistry Fundamentals, 1984
A mathematical model is presented for catalytic char gasification where naturally occurring mineral impurities catalyze the gasification reactions. The model is based on a probabilistic description of the evolution of the catalytically active mineral surface during the gasification of a single char particle.
Sebastian Reyes, Klavs F. Jensen
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Char gasification in a countercurrent reactor

AIChE Journal, 1978
AbstractA model is developed for the countercurrent char gasifier of Lurgi form. Char particles are fed to the top and oxygen, inert, and steam in the bottom. The combustion zone is defined as the zone in which there is a nonzero molfraction of oxygen.
Neal R. Amundson, Luis Ernesto Arri
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Percolative Fragmentation of Char Particles during Gasification

Energy & Fuels, 2000
Percolative fragmentation was confirmed to occur during gasification of three microporous coal chars. Indirect evidence obtained by the variation of electrical resistivity (ER) with conversion was supported by direct observation of numerous fragments during gasification.
Feng, Bo, Bhatia, Suresh K.
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Single particle char combustion and gasification

Computer Methods in Applied Mechanics and Engineering, 1989
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ballal, Girish, Li, Chin-Hsien, Glowinski, Roland, Amundson, Neal R.   +3 more
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CO2 gasification of eucalyptus wood chars

Fuel, 1996
Chars obtained from Eucalyptus grandis sawdust at different carbonization temperatures were gasified with CO2 in isothermal and non-isothermal t.g. experiments. At low and intermediate conversion values the reactivity can be reasonably well explained in terms of the development of surface area as gasification proceeds. At high conversion values a steep
Néstor Tancredi, Tomás Cordero, José Rodríguez-Mirasol, Juan J. Rodríguez   +3 more
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Char Properties and Gasification

1985
There is increasing interest in the conversion of coal and biomass to gaseous fuels through the use of both high temperature and low temperature gasification processes. In gasification at high temperatures, the exothermic C-02 reaction supplies the heat to drive the endothermic C-H20 reaction and CO and H2 are the primary fuel gases produced ...
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A single‐particle char gasification model

AIChE Journal, 1980
AbstractA model is developed for the gasification of a single‐char particle in an environment of water, hydrogen, carbon dioxide, carbon monoxide and methane, existing in the gasification zone of a reactor. The model, consisting of the mass and energy conservation equations, together with the Stefan‐Maxwell relations includes the intraparticle effects ...
B. Srinivas, Neal R. Amundson
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Catalytic steam gasification of lignite char

Fuel, 1989
Abstract Three different catalysts (K2CO3, Na2CO3, Li2CO3) and the mixture [(Na,K)2CO3] were impregnated onto a lignite char to determine the effects of catalyst type and amount of catalyst loading (1–5 wt%) at different reaction temperatures (700–800 °C) on the rate of steam gasification in a thermobalance reactor using large sample weights of up to
S.D. Kim Kim, Sang Done, T.W. Kwon, J.R. Kim, W.H. Park   +3 more
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