Results 181 to 190 of about 101,799 (216)

Leach Characteristics of Coal-Gasification Char

Journal of the Environmental Engineering Division, 1980
A methodology is presented for assessing the potential for release of elements from solid waste resulting from gasification of coal and is applied to the case of a coal char formed from the Hygas steam-oxygen process. The char was subjected to both batch and continuous-flow leach tests under a variety of simulated model water types and environmental ...
Richard G. Luthy, Pantelis Vassiliou, Mark J. Carter   +2 more
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Treatment of Biomass Gasification Wastewater by Adsorption on Biomass Gasification Char

2012
Proceedings of the 20th European Biomass Conference and Exhibition, 18-22 June 2012, Milan, Italy, pp.
Castello, Daniele, M. Iamarino, F. Nanna, G. Braccio   +3 more
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The kinetics of CO2 gasification of coal chars

Journal of Thermal Analysis and Calorimetry, 2013
The gasification reactivities of three char samples derived from coals of varying ranks (“Turow” lignite, “Piast”, and “Wieczorek” sub-bituminous coals) toward CO2 were investigated isothermally using thermogravimetric analysis. Kinetic behavior was studied at temperatures of 900, 950, and 1,000 °C under atmospheric pressure.
Martyna Tomaszewicz, Grzegorz Łabojko, Grzegorz Tomaszewicz, Michalina Kotyczka-Morańska   +3 more
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Gasification reactivity of biomass chars with CO2

Biomass and Bioenergy, 2010
Abstract In this study, carbon conversion was calculated from the data obtained with a real-time gas analyzer. In a lab-scale furnace, each biomass sample was pyrolyzed in a nitrogen environment and became biomass char. For preparation of the char, the furnace was electrically heated over 40 min up to the wall temperature of 850 °C, and maintained at
Dong Kyun Seo, Sun Ki Lee, Min Woong Kang, Jungho Hwang, Tae-U. Yu   +4 more
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Kinetics of Oil Shale Char Gasification

1981
The kinetics of oil shale char gasification have been studied for Colorado oil shale from the Parachute Creek member. Reaction rate expressions similar to those previously reported for coal char were obtained for the H/sub 2/O-char, CO/sub 2/-char, and water gas shift reactions.
W. J. THOMSON, M. A. GERBER, M. A. HATTER, D. G. OAKES   +3 more
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Kinetics of a lignite-char gasification by CO2

Fuel, 1985
Abstract The gasification reaction C CO 2 has been studied using a char produced from an Utrillas lignite (Spain). The kinetics were investigated under conditions in which the chemical reaction was the controlling step, using 2.5 MPa total pressure, temperatures between 800 and 1000 °C and a fluidized-bed reactor.
J ADANEZ, J MIRANDA, J GAVILAN
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Progress in the kinetics of coal and char gasification

Chemical Engineering & Technology, 1987
AbstractThis contribution reviews the work performed mainly at Bergbau‐Forschung during the past few years. First, it deals with the quantitative description of gasification kinetics, taking into account the pressure of the gasifying agent and partial pressures of product gases.
Karl Heinrich van Heek, Heinz‐Jürgen Mühlen, Harald Jüntgen   +2 more
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Characterization of coal char gasification rate

AIChE Journal, 1991
AbstractThe transient kinetic technique was applied to the evaluation of both elemental rate constants, kav and kin, and the amount of reactive carbons, nw, which participate in gasification. The dynamic change in gasification rate with increasing conversion is due to the change in nw. Differences in the gasification rates of ten different chars can be
Tadafumi Adschiri, Takao Nozaki, Takehiko Furusawa, Zhu Zi‐bin   +3 more
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Studies on the gasification of a single char particle

Industrial & Engineering Chemistry Fundamentals, 1982
The internal structure of a devolatilized char particle (derived from coal) can be characterized by two populations of pores, the large spherical vesicles and the cylindrical micropores. A probabilistic model is developed for the evolution of the internal surface area and pore volume during the gasification of a single char particle.
Kyriacos Zygourakis, Luis Arri, Neal R. Amundson   +2 more
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Gasification Kinetics of Food Waste Char

7th International Energy Conversion Engineering Conference, 2009
*† Gasification is proven to be more beneficial than pyrolysis based on energy yield and waste destruction, but longer time is needed to finish the gasification process. Longer time of gasification is attributed to slow reactions between the residual char and gasifying agent. Consequently, the char gasification kinetics was investigated.
Islam Ahmed, Ashwani Gupta
openaire   +1 more source