what is the problem to use vehicles powered by hydrogen?
443005
The infrastructure to deliver teh hydrogen isn't set up yet.  But the biggest problem is where do you get the hydrogen?  It's not like you can sink a hydrogen well.  You need to liberate it from some other molecule like water and that takes a lot of energy.  Right now the cheapest form of energy is fossil fuel so we would just burn oil to liberate the hydrogen.  \nIt is also a problem to transport.  Needs to be highly compressed or it takes up a lot of space.  That takes more energy.  It is a bit dangerous to carry a compressed gas around.  The tank could rupture but don't worry about H-bomb issues.  Fusion isn't easy to do.  And the Hindenburg was more of a problem with the skin of the blimp.  As far as explosion I would rather be in a car accident with hydrogen then gas.  Once the collision is over the hydrogen will float up and away.  The gas will pool around all the hot engine parts and electric sparks and will be more likely to catch afire and burn you.\n\nThe up side of hydrogen is that it can be reacted in a fuel cell.  This is much more efficient then an internal combustion engine.
312779
Separating the Hydrogen and the Oxygen from regular water is a simple grade school physic's experiment. I have included a link to a experiment page. Now whether it is illegal in Great Briton, I do not know. Now why we don't use it, you would have to ask the major car manufactures that question. The technology is not new, there has been powerful fuel cells floating in outer space for almost 4 decades. The problem with hydrogen as a fuel, is that if it expands uncontrollably you will have one big explosion on your hands.
525342
Plenty of buses run on LNG, it is one of the options car companies should be thinking about.  \nWhat we really need to be working on is more renewable fuel sources like E85.  Many cars can already use this and their owners don't ever know it (check out www.cars.com).  The solution is certainly not to "open up more federal lands to oil and gas exploration", as the person above says. We need to be thinking long-term and not just coming up with ways to destroy the environment more quickly.
362726
my dear, hope u r big enough to under stand my answer.\nok i appreciate ur idea to conserve all the mechanical energy produced in a car, but the problem is c if the battery can run a car which requires 100w power that means the power delivered by the battery is 100w now that power is exactly sufficient to run the car but if u want to recharge the battery again u need 100w of more power which will increase the load on the same battery which is to be recharged. which is absurd. so my dear it is practically IMPOSSIBLE to manufacture a car of ur kind. hope u got my answer if u dint understand u go through it once again then also if u face problems do not hesitate to write to me ok bye.
987641
One of the best ideas is a device that uses the motion of the ocean waves to produce energy.  Also, it would be more efficient to simply burn hydrogen as a fuel source as opposed to trying extract the energy created when it bonds with oxygen to create water.  Another is simply burning garbage, I believe a major metropolitan city in Minnesota created a site to do this in the middle of downtown to show that it could be done with minimal side effects on the people living/working there.
686527
There are many ways to generate hydrogen outside electrolysis. Steam reforming, methane reforming, propane reforming, etc... Coastal countries may appear to have an advantage but you cannot have a fair comparison of supply and demand.  Consider the following:\n1. Many, many, many countries have access to coastal water, thus competition would be extremely fierce\n2. Countries will be more than self-sufficient and may "sell" excess product at a very low cost.\n3. Rivers, streams, rainwater etc... is available to more countries in the world than petroleum to many. \n \nI would not worry about it, depleting the sea is way way way way off, and besides, using H2 as fuel means that emission is....water. And no, the roads are not going to be slippery from algae (sorry, but I have heard a statement like that in the past)\n\nEver considered that we may come up with the technology to recover and re-use the water emission? Thus less filling up at your local Shell H2 station? \n\nI hope I was able to answer it for you in a objective manner
401900
you would have to find the hydrogen somewhere.
1031342
Hydrogen will replace fossil fuels as we gain newer technology. At first it will be expensive to run a car on Hydrogen but as with anything else cost will decrease over time.  Hydrogen is a very dangerous element to use but we have an almost limitless supply of it in our water resources here on Earth.  The equation is rather simple.  2H2O yields 4H + 2O
29987
It's an ozone depleter, and it is extremely volitile.  If you've ever heard of the Hindenberg explosion (36 people dies) that was because the Zeplin was filled with hydrogen gas.\n\nManufacture of hydrogen will result in CO2 emmission even though the use of hydrgoen does not.  That's because hydrogen gas is usually made from methane or other fossils fuels.  Theoretically, it can also be made from the electrolysis of water, but this requires a lot of electricity, and very little of the electricity available comes from sources other than fossil fuels.\n\nAsk any engineer or chemist, and they'll tell you: it's a scam.
970781
Potential of Hydrogen.
215423
The problem is oil is running out. Once the oil runs out, we will probably be able to switch to renewables and get by. But the problem is there are many things other than car transport we use petrochemicals for. Plastics, fetilizer, lubricants, moving tankers across the seas and so forth. We will still need those things, and wind farms will not fertilize our crops.\n\nSo the short answer is, we need to stop using oil for things we have alternative sources of power for, because we will still need oil for other things 100 or 200 or 500 years from now. For those things for which there is no replacement for oil.
744587
Hydrogen powered autos is the way to go. The sun's energy can be used to separate Hydrogen from Oxygen, so you definitely have something environmentally friendly.
406611
Either hydrogen or ethanol.  Research is being done at this moment to find safe, cheap, and efficient ways to bring these alternatives to the general public (of the US).  Nuclear power isn't very practical when it comes to cars, and it's proven to be pretty darned dangerous when it comes to powering homes and businesses.  Solar power is another option, but so far, it's not economical. (And for the people who say that we can't use solar power because the sun is running out, don't you realize that when the sun runs out, so do we?  Until then, the solar power is a very real - and potent - source of energy.)
510778
Blowing up engine? are we trying to use electrolysis to run an engine?? Try diluting the mixture with something other than oxygen. Or, better yet, just stop and let someone who knows what they are doing give it a whirl. The fact that you are here doesn't give me much faith in your chemical or engineering skills.
691565
Hydrogen as an energy source\n\nHydrogen is not a pre-existing source of energy like fossil fuels, but a carrier, much like a battery. There are no "hydrogen wells" or "hydrogen mines" on Earth, so H2 cannot be considered a primary energy source such as fossil fuels or uranium. Since H2 is so light, any amount present on earth will float up into the atmosphere and out into space. H2 can however be burned in internal combustion engines, an approach advocated by BMW's experimental hydrogen car. There are several methods of storing hydrogen for transport applications, the most commonly-used being gaseous storage in gas cylinders similar to those used for the storage of any pressurised gas. Alternatives include storage as metal or chemical hydrides, cryogenic storage of liquid hydrogen (as in BMW's hydrogen internal combustion engine car) and research points to nanomaterials that will be able to store hydrogen more efficiently than any of the methods above. Crucially, there is another option for those wishing to drive a hydrogen-fuelled vehicle: on-board reformation. Often over-looked, this concept involves refuelling your vehicle with a hydrocarbon fuel such as ethanol, methanol, gasoline, diesel (preferably the biofuel alternatives) and then using an on-board reformer (a device that strips hydrogen from hydrocarbon fuel to leave carbon dioxide and water vapour as waste products) to convert the fuel to hydrogen just before it is needed by the engine.\nEmission spectrum of an ultraviolet deuterium arc lamp clearly showing characteristic hydrogen emission lines (sharp peaks at 656 nm and 486 nm) and continuum emission in the 200-500 nm region. The emission spectrum of deuterium differs from that of protium due to the influence of hyperfine interactions, though these effects alter the wavelength of the lines by mere fractions of a nanometer and are too fine to be discerned by the spectrometer used here.\nEnlarge\nEmission spectrum of an ultraviolet deuterium arc lamp clearly showing characteristic hydrogen emission lines (sharp peaks at 656 nm and 486 nm) and continuum emission in the 200-500 nm region. The emission spectrum of deuterium differs from that of protium due to the influence of hyperfine interactions, though these effects alter the wavelength of the lines by mere fractions of a nanometer and are too fine to be discerned by the spectrometer used here.\n\nHydrogen fuel cells are being investigated as mobile power sources with lower emissions than hydrogen-burning internal combustion engines. The low emissions of hydrogen in internal combustion engines and fuel cells are currently offset by the pollution created by hydrogen production. This may change if the substantial amounts of electricity required for water electrolysis can be generated primarily from low pollution sources such as solar energy or wind. Research is being conducted on H2 as a replacement for fossil fuels. It could become the link between a range of energy sources, carriers and storage. H2 can be converted to and from electricity (solving the electricity storage and transport issues), from biofuels, and from and into natural gas and diesel fuel. All of this can theoretically be achieved with zero emissions of CO2 and toxic pollutants. (See also Hydrogen economy.)\n\nIn the Haber process for the production of ammonia and the world's fifth most produced industrial compound, hydrogen is generated in situ from natural gas.
337234
The answer to most of the US's problems is our dependency on oil.  Not only for automotive fuel but also for energy generation and heating.  We need to find cheaper and more efficient ways to handle these issues and soon.
512052
Most hybrid cars currently on the market are cars that have engines that can use gasoline as well as electricity as sources of power. Typically, engine runs completely from batteries from startup to 40MPH. Once the speed of the vehicle passes 40MPH, the engine switches to burning gasoline. While the vehicle is running on gasoline, the batteries would recharge. Another great thing about hybrid is that whenever the vehicle is braking, usually the excess kinetic energy is wasted and converted into heat, but in this case, the hybrid car will take that energy and convert it into electricity by recharging the batteries.