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Showing 1 to 20 of 23 for “"Combustion of coal"”.
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Fluidized-bed combustion of coal
A general review of the literature pertaining to the combustion of coal in an atmospheric fluidized bed of ,inert particles is presented. In particular, the ~henomena of fluidization and combustion have been investigated and the status of research and development in various parts of the world is …
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Fluidized-Bed combustion of coal
A general review of the literature pertaining to the combustion of coal in an atmospheric fluidized bed of ,inert particles is presented. In particular, the phenomena of fluidization and combustion have been investigated and the status of research and development in various parts of the world is …
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Combustion of Coal in Shallow Fluidised Beds
Some new information, which may enable coalfired shallow fluidized bed combustors to be designed with greater assurance, have been presented in this thesis. The mechanism of combustion of a single coal particle in a fluidized bed is studied. Experimental observations and published data suggest that …
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Co-Pyrolysis and Co-Combustion of Coal and Biomass
Sustainability, security of supply, and diversity, as well as economic competitiveness are key components of energy policy. There is increasingly stringent legislation on the environmental impact of energy production, and there is growing pressure to reduce not just NOx and SOx emissions, but also …
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Some aspects of combustion of coal in fluidized beds
This thesis presents an experimental study of the mechanism of combustion of carbon in shallow fluidized bed combustors. Burning rates and temp eratures of electrode carbon spheres and burn -out times of hatch charges of char particles were measured experimentally over a wider range of variables …
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Combustion of Coal Dust-Air Mixtures (Flammability, Radiation, Volatile)
Coal dust flammability studies are essential in order to evaluate propagation limit concentrations and the fundamental burning velocity as a function of dust concentration. This work presents such data for Pittsburgh seam bituminous coal dust using a relatively large scale horizontal flammability …
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The shallow atmospheric coal fired fluidized-bed combustor furnace
… combustor furnace is considered as being made up of two zones, the fluidized bed itself and an upper free-board zone for the disengagement of ejected particles and in which further combustion may take. place simultaneously with the radiative transfer of heat to the surrounding walls. A general …
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SIMULATION OF COMPLEX MULTIPHASE, MULTI-COMPONENT, REACTING FLOWS IN POROUS MEDIA
In this study we are concerned with the modelling of multi-component, multiphase chemically reacting flows in porous media, with particular application to the spontaneous combustion of coal and the extraction of coalbed methane. These two related problems involve complex multiphase, multi-component …
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A Study of Polycyclic Aromatic Hydrocarbons During Combustion in an AFBC System
The purpose of this study was to develop the on-line method of analysis which leads to the study of polycyclic aromatic hydrocarbons (PAHs) during combustion in an atmospheric fluidized bed combustor (AFBC) system. The study of PAHs is important because they may be produced upon the combustion of …
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An investigation on the combustion of individual coal particles
The usage of the coal is very extensive. For each particular process, there is always a better method to burn some kinds of coals than the others. Each application of the combustion of coal is an individual problem. This problem involves not only the single factor of burning of coal but also the …
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Processing of high-sulfur coals using microbubble column flotation
… emissions, which are produced through the combustion of coal, are thought to be a leading contributor to acid rain. A number of postcombustion techniques for the reduction of sulfur dioxide emissions are being tested; however, the reduction in the pyritic sulfur content of coal through …
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The suitability of coal-oil and other slurries as blast furnace tuyere injectants
This thesis examines the combustion of coal-oil slurries in the unusual low-recirculation conditions obtaining in the blast furnace tuyere raceway.<br/>A computer-controlled combustion rig was built which would simulate, as nearly as possible, the conditions of air velocity (typically 200 m/s) air …
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PREDICTING THE FORMATION OF CONDENSATION ASH FROM COAL COMBUSTION
<p>This study predicts the nature of condensation ash formed from direct combustion of coal. Three coal-fire combustors, a cyclone-fired (CF) boiler, a pulverized-fuel (PF) and a drop tube (DT) furnace were considered.</p><p>Predictions were based on the hypothesis that condensation ash is formed …
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Theoretical Studies Of Oxides Relevant To The Combustion Of Fossil Fuels
… revolution and continues to increase as more of the world becomes dependent upon fossil fuels for important applications like transportation and power production. In a general case, whenever a fossil fuel is consumed, a primary product of a complete combustion reaction is carbon dioxide. In a …
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Design and synthesis of aryl hydrocarbon receptor fusion proteins for polyclonal antibodies production and cellular delivery
… chemicals that are produced during incomplete combustion of coal, oil, gas, and garbage. Toxic effects of these compounds are mediated via the ligand activated Aryl Hydrocarbon Receptor (AHR) signaling pathway. To enable the study of the AHR signaling mechanism, our lab has generated many human …
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Fly Ash as a Soil Amendment in the Northern Red River Valley
<p>Combustion of coal occurs worldwide to produce energy for numerous residential and industrial processes. During coal combustion, byproducts including fly ash, bottom ash and slag are formed (Lafarge, 2004). By standard regulations, power plants in the United States and many other countries must …
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Experimental investigation of coal combustion in coal-laden methane jets
Combustion characteristics of methane jets laden with pulverized coal were studied by using a vertically oriented solid particle injector that entrained pulverized coal particles using the Venturi effect. The dependence of entrainment rate on the size of coal particles was studied as a function of …
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Gradient ion chromatographic determination of rare earth elements in coal and fly ash
Rare Earth Element (REE) determination in samples of coal and fly ash was undertaken by gradient high performance ion chromatography (HPIC). Ion chromatographic analysis requires that samples be in solution and that the matrix transition metals be removed. Coal samples, weighing 0.20g, were …
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Optimisation of Co-Firing of High Moisture Biomass with Coal in a Bubbling Fluidised Bed Combustor
… thesis was carried out with a particular view of enhancing the of coal fired fluidised bed hot gas generator (HGG) at the Cantley factory of British Sugar. It covers combustion of coal and biomass and their blends also called co-firing in a fluidised bed combustor. Particularly it focuses on …
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