Pressure Electrolysis based / Methanol Reforming Based / Ammonia Cracking Based
The methanol and water is mixed in specified ratio and pressurized. This mixture is passed through evaporator, metering pump and then to super heater. This hot gas is then fed into a reactor. The reaction of methanol reforming and the shift reaction, takes place in the catalytic reactor of fixed beds simultaneously to form H2 and CO2 finally.
The Main reaction:
CH3OH=CO+2H2-90.7kj/mol
CO+H2O=CO2+H2+41.2kj/mol
The general reaction:
CH3OH+H2O=CO2+3H2-49.5kj/mol
The mixed gas after reaction is passed though the heat exchanger to have the heat exchanged with feed gas in order to recover part of heat and then fed further into the gas-liquid separation buffer to separate the unreacted methanol and water, prior to passing to the condenser and cooling gas dryer for condensation in order to ensure the methanol in the reforming gas to meet the specified quality. The liquid from condensation and separation is the mixture of methanol and water, which are returned back to the feedstock tank for reuse. The reformed gas enters a set of PSA system, which separates all impurities through the adsorption and separation in one time. The hydrogen purification through PSA is adopted in the manner of 4-1-2/P and desorption at the atmospheric pressure (4 absorbers, one absorber is in adsorption, 2 times of pressure equalization). Each adsorber in a cycle undergoes adsorption (A); equalized pressure-drop for the first time (E1D); equalized pressure-drop for the second time (E2D); cis-exhale (PP), inverse purge (D); flushing (P); equalized pressure increase for the second time (E2R); equalized pressure increase for the first time (E1R) and the final pressurisation (FR). The four adsorbers shift regularly, alternating between adsorption and regeneration, according to the arranged program in a closed loop. In this way raw gas feeds and hydrogen withdraws continuously. There are a small amount of carbon monoxide and about 35%(v/v) hydrogen in the desorbed off gas. If it is recovered and used as fuel, it brings the benefit of saving energy and minimizing the pollution.
| No. | Description | Quantity |
| 1 | Heat exchanger | 1 |
| 2 | Condenser | 1 |
| 3 | Reformer | 1 |
| 4 | Evaporation super-heater | 1 |
| 5 | Raw material liquid storage tank | 1 |
| 6 | Metering pump for feedstock solution | 1 |
| 7 | Gas –liquid seporation buffer | 0 |
| No. | Description | Quantity |
| 1 | Adsorber | 4 |
| 2 | Product gas buffer | 1 |
| Description | Specification |
| Hydrogen purity | ≥99.99% (V/V) |
| Hydrogen pressure | 5 Kg/cm2g |
| Temperature of the product | At ambient temp. |
| Description | Specification |
| Methanol |
0.60~0.68 kg/Nm3-H2 |
| Demineralized water |
0.40~0.50 kg/Nm3-H2 |
| Electricity | 0.1 ~ 0.15 kwh/Nm3-H2 |
• Raw material resource is easier, storage is convenient, price is stable.
• Short in flow,high automation,simple operation.
• Minimum land occupation,low cost,when capacity is 1500 nm3/hr and under,the land occupation is less than 400m2.
• Low electricity consuming and low cost.
• No environmental pollution.
CH3OH+H2O→CO2+3H2
• Production capacity :- 20 Nm3/hr – 4000 Nm3/hr
• Purity :-99% - 99.999%
• Temperature :-Ambient
• Pressure :-8 bar – 25 bar
