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Post by huon on Sept 25, 2022 13:48:14 GMT 9.5
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Post by David B. Benson on Nov 13, 2022 3:40:45 GMT 9.5
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Post by David B. Benson on Feb 14, 2023 3:12:49 GMT 9.5
The Future Is Bright For Pink Hydrogen Felicity Bradstock 2023 Feb 12 OilPrice oilprice.com/Alternative-Energy/Nuclear-Power/The-Future-Is-Bright-For-Pink-Hydrogen.html‘Pink’ signifies that the power source for the hydrolysis is from nuclear power plants. Nuclear power isn’t considered to be renewable; I suppose because uranium has to be mined. Despite this, a good plan for excess power generated beyond the grid requirements of the moment. This way the reactors can just run flat-out, easy to control.
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Post by Roger Clifton on Feb 19, 2023 13:02:12 GMT 9.5
The Future Is Bright For Pink Hydrogen.... ‘Pink’ signifies that the power source for the hydrolysis is from nuclear power plants. Nuclear power isn’t considered to be renewable The greenhouse crisis has absolutely nothing to do with "renewability", it is entirely due to our continuing emissions of fossil carbon. We are surrounded by weak-minded people who think that our emissions will be forgiven if we can only paint our fuel sources with a virtuous colour. "Fossil-free hydrogen" is the only label that you and I should be using for hydrogen created by nuclear power. Anyone using the phrase "green hydrogen" should be treated with deep suspicion that they are trying to conceal a fossil component in its energy source. We should reply to such people with the correct phrase "Fossil-derived hydrogen", with an emphasis on its scientific measurability. Any other colour assigned to hydrogen is almost certainly a calculated deception on the part of marketing wordsmiths, so we should treat the speaker with a contempt that implies they should be shot on the spot. One such deceit that we should call out is the German plan to reform Norwegian methane in Norway and pump the hydrogen across to Germany, where it will be labelled as "carbon-free hydrogen". We should shout out from the crowd that it is "Fossil-derived hydrogen!".
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Post by David B. Benson on Mar 12, 2023 12:36:46 GMT 9.5
Inside the Global Race to Turn Water Into Fuel Max Bearak 2023 May 11 The New York Times www.nytimes.com/2023/03/11/climate/green-hydrogen-energy.htmlIn remote West Australia there is plenty of sunshine and wind. There are customers for transportable energy to power the ultra-large mining machinery, iron ore haulers, and batteries won’t suffice. So the plan is to produce so-called green hydrogen via electrolysis of sea water and consume it right there in the haulers. Looks quite feasible.
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Post by cyrilr on Mar 14, 2023 1:35:44 GMT 9.5
Inside the Global Race to Turn Water Into Fuel Max Bearak 2023 May 11 The New York Times www.nytimes.com/2023/03/11/climate/green-hydrogen-energy.htmlIn remote West Australia there is plenty of sunshine and wind. There are customers for transportable energy to power the ultra-large mining machinery, iron ore haulers, and batteries won’t suffice. So the plan is to produce so-called green hydrogen via electrolysis of sea water and consume it right there in the haulers. Looks quite feasible. Have always been sceptical of green hydrogen schemes. Hydrogen production plants are industrial facilities. They are run 24/7 to recover the large investments. Capital intensive. Running them at 20% capacity factor (when the sun is shining) makes the CAPEX 4x higher than running it at 80% (as in a grid connected system powered by reliable power). Even if your energy cost is very low, it is hard to survive such a large CAPEX disadvantage. Any investor would prefer to have the hydrogen plant be grid connected so it can run at a high capacity factor. Which means it won't be green, other than in the usual accounting fraud of "renewable energy credits". Seems to me that this is the direction things are going. Pretend green hydrogen that actually comes from fossil power.
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Post by David B. Benson on Mar 14, 2023 10:08:37 GMT 9.5
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Post by David B. Benson on Mar 14, 2023 12:08:08 GMT 9.5
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Post by cyrilr on Mar 14, 2023 17:04:33 GMT 9.5
What about the ozone layer then?
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Post by David B. Benson on Mar 17, 2023 7:55:09 GMT 9.5
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Post by cyrilr on Mar 18, 2023 0:02:20 GMT 9.5
Author makes several salient points. Most hydrogen initiatives bleed out, and even the rare successes seem to only find niche uses. We will need a lot of hydrogen for industry. Replacing coal in steelmaking with hydrogen is a huge demand driver further in the future, unless direct high temperature or aqeous electrolysis turns out the winner. Disagree with his view on biofuels. These are part of the problem and should not be encouraged other than for niche and mainly local uses (re use of waste streams etc). Using biofuels for energy is also very inefficient, such complex molecules shouldn't be burned, they should be used for bio materials, medicine etc. Synthetic fuels (made with high temperature nuclear reactors) are a much better means of powering long distance travel like planes and boats. Not terribly efficient compared to electric vehicles but it's hard to see intercontinental flights and supertankers going about on batteries, even with large improvements like lithium-air etc.
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Post by David B. Benson on Apr 5, 2023 3:43:23 GMT 9.5
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Post by huon on May 31, 2023 15:33:15 GMT 9.5
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Post by David B. Benson on Jul 5, 2023 6:17:21 GMT 9.5
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Post by David B. Benson on Oct 14, 2023 5:08:01 GMT 9.5
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Post by cyrilr on Oct 15, 2023 19:17:03 GMT 9.5
Condensation isn’t a problem; the problem is rather if you don’t condense it. Exhaust T for gas turbines is very high. No condensation. But, a lot of energy is wasted. Much more so than with natural gas. You want a condensing application when firing hydrogen, so the heat can be recovered. A CCGT or cogen process heat with flue gas exit << 100C. Fortunately, condensing clean water vapor is very easy; with no sulpheric or carbonic acid around, corrosion is not much concern, allowing cheap materials. Hot water production is potentially interesting. You could store hot water in a pit thermal store which is ridiculously cheap.
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Post by David B. Benson on Oct 28, 2023 0:47:50 GMT 9.5
Plastic Waste Becomes Clean Hydrogen Goldmine Haley Zaremba 2023 Oct 27 OilPrice oilprice.com/Energy/Energy-General/Plastic-Waste-Becomes-Clean-Hydrogen-Goldmine.htmlUnsorted, dirty plastic waste is electrically flash heated to make graphene and releases all the hydrogen as gas! Presumably an operator is paid to take the plastic waste, buys the electricity required when low-priced (better given away), to sell valuable graphene and hydrogen gas. Sounds ideal and possibly it actually is commercially feasible near large sources of plastic waste.
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Post by David B. Benson on Nov 2, 2023 8:37:09 GMT 9.5
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Post by huon on Nov 8, 2023 13:45:39 GMT 9.5
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Post by David B. Benson on Nov 29, 2023 4:36:47 GMT 9.5
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Post by David B. Benson on Dec 1, 2023 4:12:05 GMT 9.5
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Post by David B. Benson on Dec 4, 2023 9:18:53 GMT 9.5
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Post by David B. Benson on Dec 5, 2023 8:54:53 GMT 9.5
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Post by David B. Benson on Dec 16, 2023 4:50:08 GMT 9.5
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Post by David B. Benson on Dec 22, 2023 4:59:44 GMT 9.5
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Post by huon on Apr 17, 2024 14:51:48 GMT 9.5
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