Heat of combustion CNCG
Heat of combustion CNCG
(OP)
Does anyone know how to calculate heat of combustion for CNCG gas mixtures ?
LB
LB
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RE: Heat of combustion CNCG
Cheers,
RE: Heat of combustion CNCG
(CH3)2S: 1 % , N2 : 67 % , H2O: 13 % , H2S : 15 %, CH3SH : 4 %. ( % by volume).
Regards
LB
RE: Heat of combustion CNCG
The combustibles are the sulfides: hydrogen, methyl and dimethyl. Use their heats of combustion per unit volume (or mol), multiply them by their vol% (ie, mol% as for an ideal gas mix), and add the results.
RE: Heat of combustion CNCG
But where can I find the heat of combustion for these sulfides ?
Regards
LB
RE: Heat of combustion CNCG
An example for dimethylsulfide considering water is condensed back as a liquid at 25 deg C and all other gases are returned to 25 deg C (standard state):
The heat of combustion and standard heats of formation are given in kJ/mol.
carbon dioxide: 2×393.51 = 787.02
water: 6×142.915 = 857.49
sulfur dioxide: 1×296.8 = 296.80
dimethyl sulfide: -37.40
total heat of combustion, 1903.91
Similarly for hydrogen sulfide and methyl mercaptan.
Then, multiply the heats of combustion by their vol%, and add the results. Kindly check my calculations.
RE: Heat of combustion CNCG
Thank you very much ! Yoy have helped me a lot.
Best regards
LB
RE: Heat of combustion CNCG
I don't know where your CNCG will be combusted. If it is anywhere in the USA, I hope you realize the environmental permitting problems you will encounter for burning a gas that contains 15 volume percent H2S and 5 volume percent of organic sulfides.
Milton Beychok
(Contact me at www.air-dispersion.com)
RE: Heat of combustion CNCG
This is a plant in Europe with a special combustion furnace.
LB
RE: Heat of combustion CNCG
You should be aware that, in many European countries, there will be restrictions on the amount and/or concentration of SO2 which you will be permitted to emit to the atmosphere. You may have to provide a flue gas scrubber to remove SO2.
Milton Beychok
(Contact me at www.air-dispersion.com)