From GAR to NAR : The difference between net and gross as received (NAR v/s GAR) specific energy values is the latent heat of the water vapour which lowers the effective calorific value in the boiler. To convert from GAR to NAR for bituminous coals subtract approximately 1.09 mj/kg 260 kcal/kg 470 btu/lb

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Nov 02, 2012 · > Mining Equipment > formula for calculating nar of coal Print. formula for calculating nar of coal. Posted at:November 2, 2012[ 4.9 2896 Ratings] We know total moisture and Im on ADB. what formulae do we adopt to calculate GAR. what is NAR coal because available formulas

4.9/5(2.9K)The chemical equation for the combustion of coal is C + O2 = CO2. In this equation, C represents the carbon in the coal, which reacts with air, represented by O2, to form carbon dioxide, or CO2. When coal combustion occurs in an environment low on oxygen, the equation C + CO2 = 2CO may result.

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South Africanonly coal in the DES ARA market in order to sell that coal origin at higher levels when in negotiations, the utility trader said. Broker sources said December DES AR cargoes were bid

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coal blending in power stations was mainly adopted to reduce the cost of generation and increase the use of indigenous or more readily available coal. Low grade (high ash) coal can be mixed with IEA Clean Coal Centre – Blending of coals to meet power station requirements 9 . Reasons for coal blending . 2 Reasons for coal blending

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The chemical equation for the combustion of coal is C + O2 = CO2. In this equation, C represents the carbon in the coal, which reacts with air, represented by O2, to form carbon dioxide, or CO2. When coal combustion occurs in an environment low on oxygen, the equation C + CO2 = 2CO may result.

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4.5/5Coal is mostly carbon, but it has some other elements in it, notably sulfur, hydrogen, oxygen and nitrogen. The actual molecular structure varies there is no fixed "formula" for the chemistry of

A new formula for calculating the calorific value of coal from its ultimate analysis has been obtained by regression analysis of a data bank consisting of data on 775 samples of U.S. coals of all ranks. It yielded zero average difference between observed and calculated values and a standard deviation of 129 Btu/lb (300 kJ/kg).

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