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Pulverized coal-fired (PC) power plants are the major technology used to generate electricity for power generation around the world. These processes are generally considered to make a significant contribution to global climate change since they have high CO 2 emissions, with the exception of those coal-fired power plants that employ CO 2 capture and storage (CCS) technology.With regard...
Freely-falling droplets of ethanol, diesel, (castor oil) biodiesel, and their mixtures were experimentally examined in a high-temperature combustion chamber. The combustion characteristics including the burning rate, microexplosion, and sooting propensity are reported. Results show that adding biodiesel to diesel significantly reduces the extent of soot formation and slightly reduces the burning rate...
This paper investigates the impact of hydrogen (H 2 ) addition on the exhaust emissions of a 2004 Mack MP7 355E heavy-duty diesel engine. As expected, the addition of H 2 reduced substantially the emissions of particulate matter (PM), unburned hydrocarbon (HC), and carbon dioxide (CO 2 ). However, the effects of H 2 addition on the emissions of carbon monoxide (CO)...
Using sustainably-grown biomass as the sole fuel, or co-fired with coal, is an effective way of reducing the net CO 2 emissions from a combustion power plant. There may be a reduction in efficiency from the use of biomass, mainly as a result of its relatively high moisture content, and the system economics may also be adversely affected.The economic cost of reducing CO 2 emissions...
Nitrogen oxides (NO x ) is one of the harmful emissions from power plants. Efforts are made to reduce NO x emissions by researchers and engineers all the times. NO x emissions are from three resources during the combustion: prompt NO, fuel NO and thermal NO. The last one – thermal NO, which is described by ‘Zeldovich-mechanism’, is the main source for NO x emissions...
The use of biomass, which is considered to produce no net CO 2 emissions in its life cycle, can reduce the effective CO 2 emissions of a coal-fired power generation system, when co-fired with the coal, but may also reduce system efficiency.The technical and environmental analysis of fluidised bed technologies, using the ECLIPSE suite of process simulation software, is the subject of...
A technical-economic assessment of an innovative system which integrates absorption enhanced reforming (AER) of lignite with molten carbonate fuel cell (MCFC) for electricity generation is investigated using the ECLIPSE process simulator.The simulation results show that the proposed system of combining AER with MCFC has the electricity output of 206kW, with the electrical efficiency of 44.7% (low...
The performance of a combined cycle pressurised fluidised bed combustion (PFBC) plant has been calculated, using the eclipse process simulator, for a wide range of coal properties. The overall efficiency varies between 40.8 and 43.4% on a higher heating value basis according to the changing coal properties. A mathematical equation has been developed, using the least-squares algorithm, which can be...
A numerical model has been developed to describe the main deposition processes of ash particles with a predetermined chemical composition. Thermophoresis and inertial impaction are considered, the latter being the predominant process for particles > 10 μm. A single drop-tube furnace and a horizontal p.f.-fired furnace have been modelled in this study. Predicted results show that the denser (iron-rich)...
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