Pressure swing adsorption (PSA) is a technology used to separate some gas species from a mixture of gases under pressure according to the species' molecular characteristics and affinity for an adsorbent material. It operates at near-ambient temperatures and differs significantly from cryogenic distillation techniques of gas separation. Specific adsorptive materials (e.g., zeolites, activated carbon, molecular sieves, etc.) are used as a trap, preferentially adsorbing the target gas species at high pressure. The process then swings to low pressure to desorb the adsorbed material.
Steam reforming is a method for producing hydrogen, carbon monoxide, or other useful products from hydrocarbon fuels such as natural gas. This is achieved in a processing device called a reformer which reacts steam at high temperature with the fossil fuel. The steam methane reformer is widely used in industry to make hydrogen. There is also interest in the development of much smaller units based on similar technology to produce hydrogen as a feedstock for fuel cells.Small-scale steam reforming units to supply fuel cells are currently the subject of research and development, typically involving the reforming of methanol, but other fuels are also being considered such as propane,gasoline, autogas, diesel fuel, and ethanol.
A mixture of water and methanol with a molar concentration ratio (water:methanol) of 1.0 - 1.5 is pressurized to approximately 20 bar, vaporized and heated to a temperature of 250 - 360 °C. The hydrogen that is created is separated through the use of Pressure swing adsorptionor a hydrogen-permeable membrane made of polymer or a palladium alloy.
The water-methanol mixture is introduced into a tube-shaped reactor where it makes contact with the catalyst. Hydrogen is then separated from the other reactants and products in a later chamber, either by pressure swing adsorption (PSA), or through use of a membrane where the majority of the hydrogen passes through. This method is typically used for larger, non-mobile units.
Methanol reformers are being considered as a component of a hydrogen fuel cell-powered vehicle. A prototype car, the NECAR 5, was introduced by Daimler-Chrysler in the year 2000. The primary advantage of a vehicle with a reformer is that it does not need a pressurized gas tank to store hydrogen fuel; instead methanol is stored as a liquid. The logistic implications of this are great; pressurized hydrogen is difficult to store and produce. Also, this could help ease the public's concern over the danger of hydrogen and thereby make fuel cell powered vehicles more attractive. However, methanol, like gasoline, is toxic and (of course) flammable. The cost of the PdAg membrane and its susceptibility to damage by temperature changes provide obstacles to adoption.
Nitrogen Plants Table:
No | Model | Capacity (Nm3/h) | Purity | Power (KW) | Overall size (mm) |
1 2 3 4 | PN-3-39 PN-5-295 PN-5-29 PN-8-295 | 3 5 5 8 | 99.9% 99.5% 99% 95% | 0.5 | 1800*1400*1500 |
5 6 7 8 | PN-5-49 PN-8-39 PN-12-295 PN-15-29 | 5 8 12 15 | 99.99% 99.9% 99.5% 99% | 0.5 | 1800*1400*1800 |
9 10 11 12 | PN-10-49 PN-15-39 PN-25-295 PN-30-39 | 10 15 25 30 | 99.99% 99.9% 99.5% 99% | 0.5 | 2000*1700*2250 |
13 14 15 16 | PN-15-49 PN-22-39 PN-35-295 PN-45-29 | 15 22 35 45 | 99.99% 99.9% 99.5% 99% | 0.5 | 2100*1800*2200 |
17 18 19 20 | PN-20-49 PN-30-39 PN-50-295 PN-60-29 | 20 30 50 60 | 99.99% 99.9% 99.5% 99% | 0.5 | 2200*1800*2200 |
21 22 23 24 | PN-30-49 PN-45-39 PN-75-295 PN-88-29 | 30 45 75 88 | 99.99% 99.9% 99.5% 99% | 0.5 | 2400*1900*2200 |
25 26 27 28 | PN-40-49 PN-60-39 PN-100-295 PN-120-29 | 40 60 100 120 | 99.99% 99.9% 99.5% 99% | 0.5 | 2500*2100*2500 |
29 30 31 32 | PN-50-49 PN-70-39 PN-120-295 PN-140-29 | 50 70 120 140 | 99.99% 99.9% 99.5% 99% | 0.5 | 2600*2200*2850 |
33 34 35 36 | PN-60-49 PN-90-39 PN-160-295 PN-190-29 | 60 90 160 190 | 99.99% 99.9% 99.5% 99% | 0.5 | 2800*2200*2500 |
37 38 39 40 | PN-80-49 PN-120-39 PN-200-295 PN-250-29 | 80 120 200 250 | 99.99% 99.9% 99.5% 99% | 0.5 | 3200*1400*2800 |
41 42 43 44 | PN-100-49 PN-140-39 PN-250-295 PN-290-29 | 100 140 250 290 | 99.99% 99.9% 99.5% 99% | 0.5 | 3500*1500*2800 |
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