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A new method of extracting hydrogen from water more efficiently

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DDj  when you burn hydrogen you get water.

There are no cylinders or explosions.  They use hydrogen fuel cells to directly create electricity.  Maybe this will help explain it:

Fuel cells and hydrogen storage are very safe.  You can even use the small ones in air travel.  There are other threads on the forum on this topic.

Mr. Bill:

--- Quote from: DDJ on October 31, 2019, 11:08:01 AM ---I get Hydrogen is a great energy source.  How is it renewable though?  Once it is burnt it is burnt.

--- End quote ---

It's not exactly renewable, it's just a way to store energy where the waste product (water) is harmless and reusable.

Many decades ago, my wife's Chemical Engineering master's thesis was on storage of hydrogen in the form of metal hydrides.  I'm sure a lot of progress has been made since then, but I'm not up-to-date.  But hydrogen is tricky stuff to work with.  If it burns, the flame is almost invisible.  It can soak into many metals and make them brittle.  I'm definitely looking forward to the day when all the technical problems are solved.

The current technology is reinforced carbon fiber high pressure tanks.  They give about a 350 mile range between refills.  Compressors have plummeted in price and size so no longer an issue.  Absorbent technology is not viewed as needed now but definitely would be a nice to have in the future.

The main hurdle to broad adoption is price of hydrogen.  By traditional hydrogen production techniques using current price electric, it is equivalent to $5 to $6 a gallon gas.  If that can be halved, use will skyrocket overnight.  If the above research works out we are half way there. 

Many good points both good and bad about hydrogen.
The reason for the current high production cost of hydrogen is the method and material (natural gas) it is made along with the need to compress it and store it as high pressure gas or compress and refrigerate it to condense it into a liquid. As a liquid, it takes even more energy to keep it that way and is the current best form for transportation.
Metal hydride storage currently works for small scale. Nickel metal hydride batteries use hydrogen in this way, but I like the research coming out of Australia with direct conversion of air and water to ammonia for storing hydrogen. Ammonia has a higher energy density per unit volume for hydrogen storage, safer and easier to store long term, easily transported, doesn't readily ignite and burn, very minimal explosive hazard, and biodegradable.
I don't mean to cast dispersions, but I don't understand the fears people still have with hydrogen. Yes, it can explode, but so can gasoline under the right conditions. Unlike gasoline, hydrogen is lighter than air so any leak rapidly rises into the air and dissipates mostly combining with oxygen from the air to reform water unless the leak is contained so concentrations can build.

On the "Renewable" subject, FIXIT is correct. Think of hydrogen more as a battery for storing energy, Water + electricity = H2 & O2. On the reverse, Hydrogen + Oxygen = Water & energy. The energy released can be either in the form of heat when burned or some heat and electrons such as in a fuel cell. There are loses every time you convert one energy form to another and hydrogen is no exception. The trick to making it a more favorable source is to minimize the loses and cost of production. Even gas and diesel have loses. First they have to find a source of crude oil. drill the well, pump the oil, transport the oil, refine the oil, and then transport it to the end user. All of this takes time, money, and energy.

Call me a "Tin Foil Hatter", but does anyone really believe that any information from big money industry or governments concerning the ability to create, store, and use hydrogen as a fuel source cutting out all the middle men is forthcoming ? Just think of the big business income and government tax loss that would result if people had the ability to easily create and use their own fuel for energy.
Water, wind and/or sunlight are all still plentiful and free. All it takes is a cheap, easy, and safe way for people to convert it to hydrogen and/or ammonia for use to heat their homes, make their own electricity, fuel their vehicles, and cook their food.
Unless some individual were to invent the method and release it to the public, the only way we would convert to a hydrogen economy would be if a method used was still beyond the average persons ability to do themselves or if it became the only viable source as oil and gas supplies ran dry necessitating a transition with no other options.


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