bio-power jeff
This sounds like a nonsense research. With all due respect to the scientists behind this study, this method of getting hydrogen from ethanol looks inefficient. Why can\'t they just use ethanol as fuel? Why do they have to use extra materials just to get hydrogen? Ethanol can be used in a direct ethanol fuel cell, which does not require expensive platinuim materials like hydrogen fuel cells.
splatman
So it looks like they are taking ethanol, which AFAIK has pretty much been shown to be a pointless source of energy (the energy output is little more than twice the energy required to produce it, and it consumes valuable farm land), and to this they add more energy in the form of sunlight to produce hydrogen.
Or am I missing something?
Knutars
Why a detour? The Efuel Microfueler makes ethanol from waste material and allows you to plug in a power generator directly to the system, giving you engine fuel and electricity without the hassle.
Blixdevil
Yeah, this doesn\'t make sense to me either. Considering the inefficiencies of ethanol production wouldn\'t it be better use of that sunlight to use photovoltaic or solar-conversion?
donwine
There is a factory that produces fuel from the sun with a byproduct of oxygen. I am amazed when scientist are put to shame by something as simple as the green leaf. They cannot even explain how it got here and will never be able to duplicate it. If they could just recreate [the accident]!
Jim Sadler
This seems like an effort to lock the technology into corporate distribution schemes. By creating a complex technology and one that involves safety concerns from fire and explosions this process will be industrial and never for home producers. With solar cells becoming both better and cheaper one need not be overly concerned with efficiency for making a supply of hydrogen. Since sunlight or wind power are free whether you get 5% efficiency or 3% efficiency is a mute point. Add a larger solar cell unit and up your personal production or increase the windmills size a tiny bit and you are set. The technology involved is simple enough for most high school dropouts to apply.
Matt
I agree that ethanol isn\'t a good choice as a hydrogen source. Even if we ignore the costs of the gold catalyst, titanium dioxide, and fuel cell, the amount of ethanol required would easily show that this process isn\'t cost efficient. The average cost per kWh in the U.S. is about $0.13 and the average home uses about 30 kWh per day so the average daily cost is $4/day. I\'m confused as to why the article state the energy produced as kW instead of kWh.If ethanol costs over $2/gallon then this system would need to use less than 2 gallons per day to be cost effective. The article states that the researchers have been able to produce 1.32 gallons per minute with 1kg of catalyst and the researchers estimate a typical household would require 9kg of catalyst. Based on this it would be safe to say that the system would be using much more than 2 gallons of ethanol per day. Ethanol (CH3-Ch2-OH) has 5 hydrogen atoms however I\'d guess that only 1-2 hydrogen atoms could be extracted before the ethanol became unstable or is converted into unusable byproducts. This means that this process would extract 1.3-2.6 gallons of hydrogen per gallon of ethanol.
shawnhcorey
I think everyone\'s missing the point. The ethanol is a catalyst. That means they\'re getting more energy out (as hydrogen gas) then is in the ethanol consumed by the process. From what I read in the above, it\'s 4 to 5 times the energy. So, yes, it\'s worth the extra effort.
YetAnotherBob
@shawnhcorey, no, the ethanol is the hydrogen source. The Gold is the catalyst. Go back and read the Article again. The original article makes it clear that Hydrogen is produced from ethanol.
Bill Bennett
ethanol sucks wind as a car fuel additive, with 10% of that in my tank my Audi loses 20% in highway mileage ethanol is not efficient, why does our government insist to put it in my fuel tank?