Results 261 to 270 of about 50,249 (312)

Recycling of coal combustion wastes

Waste Management & Research: The Journal for a Sustainable Circular Economy, 2009
The separation of unburned carbon from coal-fired power plant bottom ashes was conducted in order to increase the possibility of the recycling of coal combustion wastes. A two-stage flotation technique was used for this study. In the rougher flotation experiments the amounts of collector, dispersant and frother, pulp density, pH, particle size ...
Öz, Derya, Koca, Sabina, Koca, Hüseyin
openaire   +2 more sources

Development and Validation of a Coal Combustion Model for Pulverised Coal Combustion

2010 14th International Heat Transfer Conference, Volume 3, 2010
To fully understand the processes of heat-and-mass transfer on the laboratory-scale and full-scale coal boilers, computer models are needed to develop, which can predict flow fields, heat transfer and the combustion of the coal particles with reasonable accuracy.
M. J. Chernetsky, A. A. Dekterev
openaire   +1 more source

Organic emissions in coal combustion in relation to coal structure and combustion temperature

Fuel, 1985
Abstract The pulsed combustion of coal has been studied in a small fluidized-bed reactor. The effect of combustion temperature and coal rank on the organic composition of the off-gas was investigated. Results are presented for the combustion of an anthracite, a medium-volatile bituminous coal and a high-volatile bituminous coal at 700, 800 and 900°C.
Odulphus S.L. Bruinsma, Everhardus J.H. Verhagen, Jacob A. Moulijn   +2 more
openaire   +1 more source

MODELLING PULVERISED COAL COMBUSTION USING A DETAILED COAL COMBUSTION MODEL

Combustion Science and Technology, 2006
ABSTRACT The ability to assess the combustion behaviour of internationally traded coals and accurately predict flame characteristics, stable species concentration, unburned carbon and pollutant emissions is of importance to the power generating industry. Despite recent advances in coal combustion modelling detailed understanding is still lacking on the
R. I. BACKREEDY, L. M. FLETCHER, L. MA, M. POURKASHANIAN, A. WILLIAMS   +4 more
openaire   +1 more source

A REVIEW OF SPONTANEOUS COMBUSTION OF COALS

Fuel Science and Technology International, 1995
ABSTRACT Coal is one of the carbonaceous materials which, under certain conditions, can combust spontaneously as a result of its oxidation with atmospheric oxygen. Coal oxidation is an irreversible exothermic reaction and its rate increases with temperature.
openaire   +2 more sources

Coal Characterization in Relation to Coal Combustion

1987
Most coals are used worldwide for combustion today. Generally all kinds of coals are applicable for combustion. The major methods of burning are fixed bed firing, fluidized bed firing and suspension firing. The last technique is used in big industrial plants for electric power generation.
openaire   +1 more source

The fluidised combustion of coal

Symposium (International) on Combustion, 1977
Fundamental and engineering aspects of fluidised combustion are reviewed. The main areas discussed include: u - the application of the two phase theory of fluidisation to the combustion of coal, - the relevance of available information on the kinetics of volatile evolution, volatile combustion and of the carbon-oxygen and carbon-carbon dioxide ...
openaire   +1 more source

Combustion and Gasification of Coal

2018
Incuding an overview of two of the most common uses of coal: combustion and gasification. First, it outlines problems and possible solutions, and then the nature of coal is described. The book goes on to describe the technical aspects of combustion of pulverized coal and the combustion mechanism of coal in fixed, moving, and fluidized beds.
A. Williams, M. Pourkashanian, J. M. Jones, N. Skorupska   +3 more
openaire   +1 more source

Spontaneous Combustion of Coal

2020
This is another aspect of Permian Gondwana coal that is rarely given significant attention in books about coal, although numerous short scientific papers dealt in the past and the present with the subject.
openaire   +2 more sources

Combustion behaviour of coal blends

1997
The combustion behaviour of several coals, different in rank and maceral composition, and of their blends was studied by thermogravimetric analysis and kinetic tests. Combustion profiles of the blends reflect those of the individual components. In particular, the curves representing the weight loss of the blends are located in between those pertaining ...
P. CIAMBELLI, M. D'AMORE, PALMA, Vincenzo, RUSSO, Paola, VACCARO, Salvatore   +4 more
openaire   +3 more sources