The principle of hydrogen production from natural gas
Release Date: 2022-01-08 16:30:15 Visit: 239
The production of hydrogen from natural gas mainly adopts the following three different chemical treatment processes.
(1) Methane steam reforming (Steam Methance reforming, SMR)
Steam reforming is the endothermic conversion of methane and water vapor to H2 and CO.
The chemical reaction process is: CH4+H2O+heat→CO+3H2
The heat required for the reaction is supplied by the heat generated by the combustion of methane. The temperature required for this process to occur is 700~850 °C, and the reaction products are CO and H2 gas, of which CO gas accounts for about 12% of the total product; CO is further converted into CO2 and H2 through a water gas transfer reaction, such as a chemical reaction process.
(2) Partial oxygen (POX)
The hydrogen production process of natural gas partial oxidant is to release CO and H2 through the partial combustion of methane and oxygen. The chemical reaction process is: CH4+1/2O2→CO+2H2+heat
This process is an exothermic reaction, which requires strict design. The reactor does not require additional heat supply sources, and the reactor outlet temperature can reach 950~1100 °C. The CO produced by the reaction is then converted into H2 through a water gas shift reaction. The hydrogen produced by the autothermal reforming process needs to be purified, which greatly increases the cost of hydrogen production.
(1) Methane steam reforming (Steam Methance reforming, SMR)
Steam reforming is the endothermic conversion of methane and water vapor to H2 and CO.
The chemical reaction process is: CH4+H2O+heat→CO+3H2
The heat required for the reaction is supplied by the heat generated by the combustion of methane. The temperature required for this process to occur is 700~850 °C, and the reaction products are CO and H2 gas, of which CO gas accounts for about 12% of the total product; CO is further converted into CO2 and H2 through a water gas transfer reaction, such as a chemical reaction process.
(2) Partial oxygen (POX)
The hydrogen production process of natural gas partial oxidant is to release CO and H2 through the partial combustion of methane and oxygen. The chemical reaction process is: CH4+1/2O2→CO+2H2+heat
This process is an exothermic reaction, which requires strict design. The reactor does not require additional heat supply sources, and the reactor outlet temperature can reach 950~1100 °C. The CO produced by the reaction is then converted into H2 through a water gas shift reaction. The hydrogen produced by the autothermal reforming process needs to be purified, which greatly increases the cost of hydrogen production.
