Post AtM7OsUhf0X2cor1DU by GuillaumeRossolini@infosec.exchange
(DIR) More posts by GuillaumeRossolini@infosec.exchange
(DIR) Post #AtKBrkVMSG8nkFGS2a by publius@mastodon.sdf.org
2025-04-21T18:55:28Z
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@BlakeHamiltonCA @collectifission Ultimately, my attitude is shaped by the many times I have been told "we don't need nuclear, renewables are more than enough", and the fact that renewables have (at least since the 1970s) consistently been used as a smokescreen for anti-nuclear-ism, and consistently tied to the "low-energy society"/"degrowth" concept.Not everybody who promotes renewables does so in bad faith, but renewables promotion itself is basically a bad-faith enterprise.
(DIR) Post #AtM4wPDUiixXo16IUK by publius@mastodon.sdf.org
2025-04-22T16:47:10Z
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@BlakeHamiltonCA @collectifission Here's the thing.On the one hand, "alternative energy" has ALWAYS meant "alternative to nuclear", NOT "alternative to fossils" — as in Amory Lovins' "coal-based, fission-free bridge to a solar future".On the other hand, I will happily tell people that I can envision a world in which half to two-thirds of the energy is supplied by solar, wind, et cetera — but only if the remainder comes from nuclear. Concentrated to balance diffuse at acceptable density.
(DIR) Post #AtM5BUcIvPMititoTA by icanbob@techhub.social
2025-04-21T21:02:11Z
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@publius @collectifission @BlakeHamiltonCA My analysis of the renewable datasets has led me to the conclusion that we are misapplying our renewable resources trying to green a JIT grid. From a climate perspective there are much better uses for those renewables.#renewableshttps://energyasicit.ca/EnergyVision/
(DIR) Post #AtM5BVkUiRVkPPjrsG by GuillaumeRossolini@infosec.exchange
2025-04-22T05:44:00Z
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@icanbob @publius @collectifission @BlakeHamiltonCA we should be storing the produced energy in a form that’s near-ready to use and doesn’t have harmful emissions as a byproductAnd we know how to do that, we’ve known for decades, yet it’s still really expensive
(DIR) Post #AtM5BWzQ6R2oFzjImG by publius@mastodon.sdf.org
2025-04-22T16:49:50Z
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@GuillaumeRossolini @icanbob @collectifission @BlakeHamiltonCA If something is really expensive (per unit of results achieved), it's often not a productive or even viable line to pursue, because it will squeeze out other economic activity. This is doubly true in the case of energy supply, the whole function of which is to enable other economic activity. As long as the motors turn when you hit the switch, you don't care where the current comes from!
(DIR) Post #AtM7OsUhf0X2cor1DU by GuillaumeRossolini@infosec.exchange
2025-04-22T17:14:45Z
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@publius @icanbob @collectifission @BlakeHamiltonCA if storing hydrogen (that was my line of thinking) means that fossil fuels will go out of business, I’m ok with that
(DIR) Post #AtMBk3vKlD95yGfREu by publius@mastodon.sdf.org
2025-04-22T18:03:30Z
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@GuillaumeRossolini @icanbob @collectifission @BlakeHamiltonCABut it doesn't, because it's unworkable. An energy supply "solution" which consumes too much energy and other resources, and delivers too little, is no solution at all, because either it won't be implemented at all, or the people who don't implement it will do so much better than the people who do that the implementation in some places won't matter.(Hydrogen is a bad solution partly because it leaks straight through steel.)
(DIR) Post #AtMByEmXBfORhWJK3k by publius@mastodon.sdf.org
2025-04-22T18:06:05Z
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@GuillaumeRossolini @icanbob @collectifission @BlakeHamiltonCA The rationale for promoting rooftop solar in Britain was not to supply a meaningful part of the country's energy needs, which it could never do, but explictly to "get people to engage more with their energy use". This is a purely ideological project, not a practical one, and the ideology is not one I find useful.
(DIR) Post #AtMK3g8RiMSbcKfIwq by GuillaumeRossolini@infosec.exchange
2025-04-22T19:36:38Z
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@publius @icanbob @collectifission @BlakeHamiltonCA what is “too much energy consumed”, when the energy we’re talking about happens to be renewable energy that would otherwise fall on the roof?The mere presence of the roof prevents that energy from achieving its intended purpose (heating the ground), so we might as well do something with itWe could send it to the grid, but too much is too much and at some point the grid will be fullWhat else, store that energy? We don’t have batteries big enough and building them for cross seasonal storage would be ludicrousThen convert this energy, use it for dialysis or something for later reuse, that’s the best strategy hereI also disagree with your assessment, there are challenges to hydrogen storage but it’s been done for a long while, just not at a scale that drives costs down
(DIR) Post #AtMoyJbDAllqr12hA8 by icanbob@techhub.social
2025-04-23T01:22:57Z
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@GuillaumeRossolini @publius @collectifission @BlakeHamiltonCA H2 and electricity are both energy currencies. They deliver an energy service from an energy source. Just because we can convert btw these currencies doesn’t mean it always makes sense to do so.https://energyasicit.ca/Currencies/
(DIR) Post #AtQcvs9DqNWCJmrKmO by GuillaumeRossolini@infosec.exchange
2025-04-24T21:26:59Z
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@publius @icanbob @collectifission @BlakeHamiltonCA w/r/t leaking, my understanding is that we can’t simply use existing infrastructure, but adapting is absolutely doableI hear there are salt caves that can hold the stuff, it’s not like this is high tech
(DIR) Post #AtT4Eon1dgawU4egdc by icanbob@techhub.social
2025-04-25T10:08:40Z
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@publius @GuillaumeRossolini @BlakeHamiltonCA @collectifission The world already produces and handles a lot of H2. “Global production of hydrogen is around 110MTpa in 2023, of which c30% is for ammonia, 25% is for refining, c20% for methanol and c25% for other metals and materials.”https://thundersaidenergy.com/downloads/global-hydrogen-supply-demand-by-region-by-use-over-time/
(DIR) Post #AtT4EqHY5gbZ71wZqy by GuillaumeRossolini@infosec.exchange
2025-04-25T10:28:20Z
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@icanbob @publius @BlakeHamiltonCA @collectifission I’m more interested in the production method for hydrogen itself, than how it is being usedYes there is already a lot of demand that could be switched to methods that cause less co2 emissions, and to no one’s surprise, they are industry, not domestic use or transports [edit] The link is a video (in French) by @lemonde titled “Climat : L'hydrogène, une réponse viable pour l'avenir ?”Description:L'hydrogène est-il le futur des énergies renouvelables ? A quoi sert-il et comment l’utilise-t-on aujourd’hui ? Est-ce qu’il va remplacer le pétrole dans les voitures et les avions ? Comment l’utiliser au bon endroit pour réussir la transition ?Ines Bouacida est chercheuse à l’IDDRI et spécialiste du gaz et de l’hydrogène dans la transition.https://youtu.be/goppqPjyN98
(DIR) Post #AtT4ErP1vMBQaWS49Y by icanbob@techhub.social
2025-04-25T14:44:49Z
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@BlakeHamiltonCA @publius @GuillaumeRossolini @collectifission @lemonde The most common H2 production method; SMR uses the carbon in methane to split water. CH4 + 2H20 => CO2 + 4H250% of the H2 comes from the steam. 2nd most common ;coal gasification uses carbon in coal to split water.C + 2H2O => CO2 + 2H2100% of H2 comes from steam.In both cases CO2 is concentrated and not diluted with N2.
(DIR) Post #AtT4EscBPwIaLbc5IG by icanbob@techhub.social
2025-04-25T14:55:07Z
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@BlakeHamiltonCA @lemonde @GuillaumeRossolini @publius @collectifission Contrast this with how methane is combusted in nat gas turbine to produce electricityCH4 + 2(20%O2; 80%N2) => CO2 + 2H2O + 2(80%N2)Much more difficult to capture this flue gas CO2 because of the N2 from combustion air.The only reason we don’t currently capture concentrated CO2 from H2 manufacturing is that CO2 is not priced sufficiently.
(DIR) Post #AtT4EtNKae0qhpfjma by publius@mastodon.sdf.org
2025-04-26T01:42:11Z
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@icanbob @BlakeHamiltonCA @lemonde @GuillaumeRossolini @collectifission “Carbon capture and sequestration” is a dead end, less because of the absurd effort required to concentrate CO₂ out of flue gas, or worse yet, atmospheric air, than because of the colossal arisings of the stuff. That's millions of tonnes every single day, of a gaseous waste which combines avidly with water to form an acid known to dissolve rock, and which sometimes seeps from the ground in suffocating bursts.
(DIR) Post #AtT4uHVXlrFpQNFWpk by publius@mastodon.sdf.org
2025-04-26T01:49:55Z
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@GuillaumeRossolini @icanbob @collectifission @BlakeHamiltonCA The use case that is being promoted is the substitution of hydrogen for pipeline gas (methane), or more often, the use of a methane-hydrogen blend.I don't know about where you are, but here, the gas lines were recently replaced with plastics. Hydrogen would diffuse slowly through the walls of the old metal lines, much more rapidly through joints or gaskets that were methane-tight. But these plastic lines won't hold it at all.
(DIR) Post #AtT5FdXn2HkTqkU19U by publius@mastodon.sdf.org
2025-04-26T01:53:40Z
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@GuillaumeRossolini @icanbob @collectifission @BlakeHamiltonCA One thing you can't do with hydrogen is put fossil-fuel companies out of business, because they're the ones with the expertise in handling it.In fact, it's due to pressure from the oil refiners that California now has in effect a mandate for all transit buses to be hydrogen-powered by 2030, which is almost certainly unworkable.(Ask any petroleum engineer if you want to hear about how much trouble H₂ is to work with.)
(DIR) Post #AtTngQ8zlvQc2brZVA by icanbob@techhub.social
2025-04-26T10:11:31Z
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@publius @GuillaumeRossolini @BlakeHamiltonCA @collectifission IMO the H2=fossil industry=bad is not the helpful debate. How to provide energy in a climate sensible way is. For example is this bad=fossil industry? Or a win for climate?https://protonh2.comOr is e-LOHC bad=fossil industry? Or a great idea for energy storage and transport and a win for climate?https://ayrtonenergy.comBoth are headquartered in Calgary.
(DIR) Post #Au2Q0TpYHiY9AXC7Tk by publius@mastodon.sdf.org
2025-05-13T03:01:11Z
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@icanbob @BlakeHamiltonCA @GuillaumeRossolini @collectifission @lemonde Of course, for either steam reforming of methane or coal gasification, you first have to produce the steam. Mostly that's done by burning fossil fuels. If you did it with a high-temperature nuclear reactor, you'd have a much better carbon balance.
(DIR) Post #Au2yR8nC0b7eBGyWwq by icanbob@techhub.social
2025-05-13T09:26:57Z
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@GuillaumeRossolini @publius @collectifission @lemonde @BlakeHamiltonCA Or you could do gasification in situ and only extract the H2.https://protonh2.comhttps://en.m.wikipedia.org/wiki/Underground_coal_gasification