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Harvesting clean hydrogen fuel through artificial photosynthesis -- ScienceDaily

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Hydrogen is the cleanest-burning fuel, with water as its only emission. But hydrogen production is not always environmentally friendly. Conventional methods require natural gas or electrical power. The method advanced by the new device, called direct solar water splitting, only uses water and light from the sun.

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In my run for U.S. Senate against Utah's Orrin Hatch, I posted many progressive ideas and principles that I internalized over the years. I'm leaving that site up indefinitely, since it describes what I believe most members of our species truly (more...)
 

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Hosea McAdoo

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This and fusion are about all that is clean and possible on the long term, although "long term" may be meaningless as we face the disaster of climate change, As clean as this, fusion, solar, geothermal and wind etc.; even with total change the world over it is very likely way too late, even if the fools leading us were interested. The Nero philosophy reigns.

Submitted on Friday, May 4, 2018 at 10:01:53 PM

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Chuck Nafziger

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There is promise here, but 3% efficiency after 40 years of trying is a long ways or a long time from the 20 to 30% that would make this the wave of the future. The .6% efficiency for natural photosynthesis sounds very low. Wikipedia says natural photosynthesis is 3 to 6%, which is more like what I remember. Solar cells can do better than this, but then you need batteries for storage. Perhaps the .6% has to do with reconverting the grown plants back to energy by burning, or by chemically producing ethanol and then burning. Hydrogen and oxygen also have storage problems and using them introduces more losses.

I wish the numbers added up better so one could have a better idea if this is hope or hype.

Submitted on Friday, May 4, 2018 at 11:22:17 PM

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Daniel Geery

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Reply to Chuck Nafziger:   New Content

It is WE who need to continuously think of better answers.

Vasectomies come promptly to mind, along with many others you've read and commented on.

Am I hopeful? NO. I am in the last stage of grief, as expressed by Elizabeth Kubler Ross, The five stages, denial, anger, bargaining, depression and acceptance are a part of the framework that makes up our learning to live with the one we lost. They are tools to help us frame and identify what we may be feeling. But they are not stops on some linear timeline in grief.

Trying hard to deal with the last stage, while still "living what's left of my life."

Submitted on Tuesday, May 15, 2018 at 11:49:15 PM

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Vernon Huffman

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When will we see the use of uncompressed hydrogen as an aviation fuel? It displaces twice the rate of helium, enabling lighter than air assent. It burns very efficiently in a simple jet engine. Variable aspect wings could allow temporary fuel storage, allowing the plane to convert from a blimp to a glider through the use of fuel. The biggest obstacle is embrittlement of flexible storage containment. Is the answer to be found through biomimicry?

Submitted on Saturday, May 5, 2018 at 1:22:53 PM

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Daniel Geery

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Probably this would be through engineering, which I am 100% in favor of. Please check hyperblimp.com if you haven't already.

And read "The Hydrogen Economy," as I did some decades ago click here

Submitted on Tuesday, May 15, 2018 at 11:52:36 PM

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