CML103 - Term paper Methanol Synthesis Industrial process/chemical synthesized: Today in industries, generally the basis for the manufacture of methanol is synthesis gas (normally called as syn gas). Syn gas is a mixture of carbon-monoxideand hydrogen.
By syn gas :-
For the production of methanol to be independent of feedstock material, the three steps that can be followed are :-
Syn gas preparation,
Methanol synthesis and,
Methanol purification that contain the reactions given below
a.) CO (g) + 2H2 (g) CH3OH (g) H25oC = -90.79 KJ/mol
b.) CO2 (g) + 3H2 (g) CH3OH(g) + H2O (g) H25oC = -11.90 KJ/mol
c.) CO2 (g) + H2 (g) CO (g) + H2O (g) H25oC = 41.01 KJ/mol
The above three given chemical reactions are reversible reactions that is why we must have to control the temp., pressure and syngas mixture for the production of intermediate or products. And by observing the
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Acetic acid (CH3COOH) and formaldehyde (HCHO) can be obtained by processing methanol and is also used for petrol bending (petroleum derived liquid). A large proportion of methanol is used to make motor spirit, vinyl acetate, acetic anhydride these chemicals is used for the manufacture of adhesives, coating, photographic film, synthetic fiber, synthetic rubber and thermoplastic and mainly the methyl-tertiary butyl ether (MTBE) which reduces “knock” and also the proportion of CO and hydrocarbon in the exhaust. we can produce various aromatic hydrocarbons and alkanes suitable for petrol (hydro carbon with five to eight carbon atoms ) by throwing the stream of vapour over alumina at temp. around 600 kelvin. An equilibrium mixture of methanol, dimethyl ether and water is produced which has 25 percent methanol. 2 CH3OH(g) CH3-O- CH3 (g) + H2O(g)