Combustion theoretical oxygen

Theoretical Oxygen and Air for Combustion The amount of oxidant (oxygen or air) just sufficient to burn the carbon, hydrogen, and sulfur in a fuel to carbon dioxide, water vapor, and sulfur dioxide is the theoretical or stoichiometric oxygen or air requirement. The chemical equation for complete combustion of a fuel is... 

In processes involving the combustion of fuels, either pure oxygen or air is supplied in amounts greater than the stoichiometric requirements for complete combustion. The terms "theoretical air or theoretical oxygen are thus frequently encountered in combustion problems. The molar composition of dry air at atmospheric conditions [from International Critical Tables, Volume 1, p. 393 (1926)] ... 

Theoretical Oxygen The moles (batch) or molar flow rate (continuous) of O2 needed for complete combustion of all the fuel fed to the reactor, assuming that all carbon in the fuel is oxidized to CO2 and all the hydrogen is oxidized to H2O. 

The pure compound capacity accounts for the amount of charge that can be released by the fuel, it is independent of E° and proportional to the ratio njM. Therefore exhibits the same trend as E p. The theoretical energy conversion efficiency is the ratio between the reversible (maximum) electric work that can be obtained by electrochemical oxidation of the fuel and the heat released by direct combustion with oxygen, that is ... 

Calculate the temperature for adiabatic CO combustion by a theoretical oxygen amount at atmospheric pressure according to... 

Flame Temperature. The adiabatic flame temperature, or theoretical flame temperature, is the maximum temperature attained by the products when the reaction goes to completion and the heat fiberated during the reaction is used to raise the temperature of the products. Flame temperatures, as a function of the equivalence ratio, are usually calculated from thermodynamic data when a fuel is burned adiabaticaHy with air. To calculate the adiabatic flame temperature (AFT) without dissociation, for lean to stoichiometric mixtures, complete combustion is assumed. This implies that the products of combustion contain only carbon dioxide, water, nitrogen, oxygen, and sulfur dioxide. 

Stoichiometric Concentration (Used by permission of Frank T. Bodurtha, Inc., New London, New Hampshire). In a combustion reaction in air, the stoichiometric concentration, Cjt, of any reac tant is the concentration theoretically required for complete conversion by reacting completely with oxygen. For example, for the combustion of propane in air ... 

Theoretically, to produce 1 kg of nitric acid requires at least 0.27 kg of ammonia and 4.33 kg of air (or 1.02 kg of oxygen). These weights refer to the content of concentrated acid. Realistically, however, the process is divided into three successive stages combustion, oxidation, and absorption. 

In contrast to combustion process, which works with excess air, the gasification process works on partial combustion of coal with the oxygen supply controlled (generally 20 to 70% of the amount of 02 theoretically required for complete combustion) such that both heat and a new gaseous fuel are produced as the coal is consumed. In simplest terms, the stoichiometric reactions are as follows ... 

Although any flammable material can theoretically be used as a fuel, only a few are realistically practical. Some of them have low energy content, and/or produce toxic gases and other polluting vapors on combustion, e.g. tbe pyrophoretic combustion of iron particles. In contrast, tbe combustion of hydrogen in pure oxygen results in only heat and water. 

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