Methanol Decomposition for Hydrogen Production Unit

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Posting date : Sep 02, 2013

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MACHINERY & ELECTRICAL | Nuclear re

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Methanol in the temperature range of 220 to 300 degrees, cracking in the copper catalyst to generate hydrogen and carbon monoxide, carbon monoxide in the same catalyst under the reaction with steam to produce carbon dioxide, carbon dioxide is removed by pressure swing adsorption process, ultimately producing hydrogen. The reaction is: of CH3OH = 2H2 + CO, CO + H2O = H2 + CO2, and the total reaction: of CH3OH + H2O = 3H2 + CO2. Process principles The reaction is as follows: The main reaction: CH3OH = CO +2 H2 -90.7KJ/mol CO + H2O = CO2 + H2 +41.2 KJ / mol The overall reaction: CH3OH + H2O = CO2 +3 H2 -49.5KJ/mol Side effects: 2CH3OH = CH3OCH3 + H2O +24.9 KJ / mol CO +3 H2 = CH4 + H2O +206.3 KJ / mol Reaction transforming the gas by the heat exchanger, cooling, condensing its composition H2 CO2 CO CH3OH H2O Saturation of 73 ~ 74% 23 ~ 24.5% ~ 1.0% 300ppm The main reaction is an endothermic reaction, the use of external heat conducting oil. Conversion of gas by the heat exchanger, cooling, condensing into the scrubber tower kettle collection not transformed after methanol and water recycling Technical indicators Gas production: 2.5 ~ 300Nm3 / h Impurities: ≤ 10PPm Working pressure: 0.05 ~ 1.0MPa Pressure dew point: ≤ -40 ° C.