Of these the reforming of hydrocarbons is perhaps the nearly every one force able on this moment (see Figure 1). in to calculation just before hydrogen, still , reforming of hydrocarbons as well yields nitrous oxides, carbon dioxide, carbon monoxide, mor e over draw gases. since a upshots reforming of remnant fuels does not pass up the exhaustion of our imperfect bring in of fossil hydrocarbon fuels nor check develop of carbon dioxide and carbon monoxide, however reforming potentially emits fewer of these than does usual fire . a large amount reforming processes exchange the formed carbon monoxide headed for carbon dioxide with warm up on or after the reforming process. qualification hydrogen comes starting renewably formed biofuels alternative of fossil fuels, the reforming process be capable to be real argued near in addition belive “green,” as the carbon involved comes from the active cycle and returns to it.
Table 1 Volumetric Energy Density of Various Energy Carriers
Energy Carrier Energy Density
Hydrogen 10.1 MJ/cubic meter; gas at 1 atm (1 bar) and 15°C
1,825 MJ/cubic meter; gas at 200 barg and 15°C
4,500 MJ/cubic meter; gas at 690 barg and 15°C
8,491 MJ/cubic meter; liquid
Methanol 15,800 MJ/cubic meter; liquid
Methane 32.6 MJ/cubic meter; gas at 1 atm and 15°C
6,860 MJ/cubic meter; gas at 200 barg and 15°C
20,920 MJ/cubic meter; liquid
Propane 86.7 MJ/cubic meter; gas at 1 atm and 15°C
23,489 MJ/cubic meter; liquid
Gasoline 31,150 MJ/cubic meter; liquid
Diesel 31,436 MJ/cubic meter minimum; liquid
Figure 1 Reformer (Methanol Example)
Hydrolysis uses electrical energy to break the hydrogen bond with oxygen in water, but electrical energy today is typically produced from fossil fuels. With the inefficiencies associated with traditional technologies, hydrolysis remains a relatively inefficient way to store energy. However, when the electricity for electrolysis comes from otherwise underused renewable sources, the efficiency arguments change significantly.
New sources of hydrogen are being developed and refined. For example, coal gasification (potentially with biomass) in a “clean coal” facility can produce a supply of hydrogen. Whether this source is environmentally green depends on carbon capture and storage, but the value of by-products of various polygeneration schemes may provide the economic incentive to pay the costs of carbon sequestration.
New technologies show promise for very efficient extraction of hydrogen from biofuels. For example, a method for extracting hydrogen from ethanol with a 90 percent yield factor has been demonstrated using inexpensive catalysts and moderate temperatures. Transporting liquid biofuels, rather than hydrogen itself, can simplify its distribution. The biofuel could be transported to fueling stations that make hydrogen on site for deliver
KeiperTech is the industry leader in Commercial 120v Hydrogen Production Units. Contact them today at email@example.com.
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