Discussion on Industrial Hydrogen Production Methods
Steam Methane Reformer-SMR
Hydrogen production from methanol cracking-MC
Main reaction:
CH3OH=CO+2H2 +90.7 KJ/mol
CO+H2O=CO2+H2 -41.2 KJ/mol
Total reaction:
CH3OH+H2O=CO2+3H2 +49.5 KJ/mol
Side reaction:
2CH3OH=CH3OCH3+H2O -24.9 KJ/mol
CO+3H2=CH4+H2O -+206.3KJ/mol
After the conversion gas that above-mentioned reaction generates is cooled and condensed, its composition is:
H2- 73~74%
CO2-23~24.5%
CO-~1.0%
CH3OH-300ppm
H2O-饱和
H2O-saturated
Hydrogen production from water electrolysis-Electrolyzer
Comparison of three hydrogen production methods
The main methods of hydrogen production are: natural gas steam reforming to produce hydrogen, methanol cracking to produce hydrogen, and water electrolysis to produce hydrogen
These three hydrogen production methods have different applicability:
1. Large-scale hydrogen production prefers natural gas steam reforming process
2. For high-purity hydrogen that strictly limits carbon-containing impurities, only the water electrolysis process can be selected
3.Considering the cost factor, it is recommended to choose the methanol cracking hydrogen production process under the condition that the natural gas supply is constrained.