Weight is an issue for freight truck. DOT has weight limits on roads. Truckers get paid based on the weight of goods moved. If the truck weighs more then it will be able to carry less payload and revenue will decrease. If fuel cost savings will offset the payload reduction then it can work economically. It may work with BEV.
I actually thought of getting the Hindenberg over with in the first post.
Chinese EV maker Nio has swapping stations. Tesla decided against it and spent on a much larger charging network, instead of a much smaller battery swapping network.
Syngas. Methane. Haber-Bosch process yields ammonia from natural gas (or methane). Fischer-Tropsch converts syngas to longer chain hydrocarbons. The Germans in WWII used the Fischer-Tropsch process to make fuels and other stuff (POL), as did South Africa during Aparthied.
Bio Butanol?
I'd like to see if this was peer reviewed. It seems there is a violation of the 2nd law of Thermodynamics here. This describes a perpetual motion machine. Less energy to generate the H2 than by recombining it with O2. Impossible or energy crisis solved.
I don’t think that’s what the article says. Aluminum is simply more reactive with oxygen than hydrogen. Aluminum oxygen reactions usually stop because aluminum oxide protects aluminum but with nano particles of aluminum in the presence of gallium there’s always more aluminum exposed to break the oxygen hydrogen bond.
The article is a summary of, and indeed links to, a peer-reviewed paper. Enjoy.
If the reaction consumes aluminum then you need to consider the energy input needed to create the nano-aluminum, no? You got to mine it, reduce it (mucho energy) and then produce a nano form of it (energy unknown). BTW fossil is largely involved in aluminum production, it is very energy intensive. How many grams of aluminum are consumed per 1g of H2? Then do the energy balance. I will wager a days pay that it uses MORE net energy than direct electrolysis.
The article says that the aluminum could come from recycled. So no additional energy costs from mining and production other than initial use. The gallium metal would be more of a challenge. Again from the article some of it can be reclaimed from the hydrogen production process. I found it interesting that coincidentally gallium is a by product of the processing of bauxite into aluminum.
Yes but recycled aluminum isn't free. You are taking that scrap out of the stream so it has to be replaced with freshly mined and reduced bauxite. There is no free energy lunch. The process is essentially burning aluminum and generating hydrogen. Its just reverting the aluminum (does it have to be pure Al? scrap isn't pure Al by a long shot) back to Al2O3 and recovering the energy that was done to reduce it in the first place.
My day’s pay (I’m retired) versus yours? Doesn’t seem fair to you.
Perfectly fair. Never bet against the laws of thermodynamics. You will lose everytime. Can't even breakeven.My day’s pay (I’m retired) versus yours? Doesn’t seem fair to you.
Oh, I believe you that it uses more energy, but the article never did claim it violated the laws of thermodynamics or even that it was cheap or that they were getting more out than they put in. In fact within the first few paragraphs they said that it could be useful only if scientists could make use of existing aluminum and gallium and if they could figure out how to do it cheaply.
It's a job criteria for professional chemists to know the laws of thermodynamics. They use them to look for new and ever more efficient ways to make stuff. The price of anything depends on how much of it they make.
There is also the law of economics. Existing aluminum isn't free. At current alloy prices this conversion costs a minimum of $5.71 per kwh. And aluminum alloy isnt likely to decrease much in price if the overall cost of energy increases. If you want to decarbonize electrical generation just set the price of electricity at $5.71 and cutout the middleman of green hydrogen folly. CO2 emissions will drop like a rock. Problem solved.
I am not a defeatist, I can just do math and take data. I know dreaming is fun but this is a subject that needs a reality viewpoint. Someone needs to provide it, with analysis. Throwing valueable resources at technological and economic dead ends is dangerous for society.
I haven't really been following SLS until last week, but now that I see how much problems they've been having with H2 fueling, I'm starting to feel I should read the books and go down there myself. 
Not saying I could do a better job, but what the 
is going on that in 2022, liquid hydrogen is suddenly a problem? 
I have the same questions as you.
