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Newly discovered enzyme that turns air into electricity

Posted: Thu Mar 09, 2023 10:23 am
by Juniper
https://phys.org/news/2023-03-newly-enz ... ource.html

Newly discovered enzyme that turns air into electricity, providing a new clean source of energy

Australian scientists have discovered an enzyme that converts air into energy. The finding, published today in the journal Nature, reveals that this enzyme uses the low amounts of the hydrogen in the atmosphere to create an electrical current. This finding opens the way to create devices that literally make energy from thin air.

The research team, led by Dr. Rhys Grinter, Ph.D. student Ashleigh Kropp, and Professor Chris Greening from the Monash University Biomedicine Discovery Institute in Melbourne, Australia, produced and analyzed a hydrogen-consuming enzyme from a common soil bacterium.

Recent work by the team has shown that many bacteria use hydrogen from the atmosphere as an energy source in nutrient-poor environments. "We've known for some time that bacteria can use the trace hydrogen in the air as a source of energy to help them grow and survive, including in Antarctic soils, volcanic craters, and the deep ocean" Professor Greening said. "But we didn't know how they did this, until now."

In this Nature paper, the researchers extracted the enzyme responsible for using atmospheric hydrogen from a bacterium called Mycobacterium smegmatis. They showed that this enzyme, called Huc, turns hydrogen gas into an electrical current. Dr. Grinter notes, "Huc is extraordinarily efficient. Unlike all other known enzymes and chemical catalysts, it even consumes hydrogen below atmospheric levels—as little as 0.00005% of the air we breathe."

The researchers used several cutting-edge methods to reveal the molecular blueprint of atmospheric hydrogen oxidation. They used advanced microscopy (cryo-EM) to determine its atomic structure and electrical pathways, pushing boundaries to produce the most resolved enzyme structure reported by this method to date. They also used a technique called electrochemistry to demonstrate the purified enzyme creates electricity at minute hydrogen concentrations.

Laboratory work performed by Kropp shows that it is possible to store purified Huc for long periods. "It is astonishingly stable. …

Re: Newly discovered enzyme that turns air into electricity

Posted: Mon Mar 13, 2023 9:25 pm
by Finrock
Someone was worried about what if they eat up all the hydrogen?

...

Re: Newly discovered enzyme that turns air into electricity

Posted: Sat May 30, 2026 5:51 am
by High Spy
Finrock wrote: Mon Mar 13, 2023 9:25 pm Someone was worried about what if they eat up all the hydrogen?

...
India looks to bake a ginormous hydrogen pie. 8-)
++ transcript

Did you know that while Pakistan has no electricity for hours every day, India just found a way to become the world's biggest energy maker? India spends $90 billion every year buying fuel from other countries. They buy 40% of all their energy from outside. But they just started a secret plan to change this completely. By 2030, India wants to make 5 million tons of clean fuel every year. Green hydrogen. The amazing part, it will cost less than the dirty fuel they buy today. $96 billion is already promised to make this happen. Big companies have promised over $100 billion more. But India has one huge advantage no other country has. They already know who will buy their clean fuel. Their own factories are waiting for it. 5 million tons of sure buyers. And by the end of this video, you'll understand why this plan could make every other country's energy plan look completely [music] wrong. India has a huge problem. It's the world's third biggest energy user with 1.4 billion people. But it has to buy 40% of its energy from other countries. That costs $90 billion every year. India also makes more pollution than almost any country, and it's getting worse by 3.8% every year. India promised to stop all pollution by 2070 and stop buying energy from others by 2047. These aren't just nice promises. They're about survival. A country that spends $90 billion every year buying energy will always be weak. Green hydrogen could solve both problems at once. Stop pollution and stop buying energy from others. India doesn't have time [music] to test this slowly. With 90 billion flowing out every year, this isn't about climate. It's about economic survival. But the plan to fix this is massive. In 2023, India launched the National Green Hydrogen Mission. The government put in $2.3 billion to start. But the total plan needs $96 billion. The goal, make 5 million tons of green hydrogen every year by 2030. The scale is massive. 125 gigawatts of new clean energy. 600,000 new jobs. Save $12 billion on energy imports every year. Stop 50 million tons of pollution annually. [music] This isn't a small test. This is changing the entire economy. The mission includes money for factories, pilot projects, research, and special hydrogen ports. $96 billion sounds like a lot for a developing country. But here's the smart part. India spends $90 billion every year buying energy. A one-time $96 billion investment could stop that 90 billion going out forever. The money is ready. The targets are set. But what makes this plan work isn't the money. It's the cost advantage no other country can match. India has the biggest advantage for making green hydrogen. The world's cheapest renewable energy. Electricity makes up 50 to 70% of green hydrogen costs. So, cheap electricity means cheap hydrogen. In states like Gujarat and Rajasthan, solar power costs only [music] 2.6 cents per kilowatt-hour. By 2030, it will drop to just 1.8 cents. That's the cheapest in the world. India has 748 gigawatts of solar potential and 1,790 gigawatts of wind potential. The country is drowning in renewable energy. Right now, India's green hydrogen costs 4.8 $4 to $6.11 per kilogram. But by 2030, they plan to make it for $1.37 per kilogram. Here's the amazing part. Dirty hydrogen from fossil fuels costs $2 per kilogram today. That means India's green hydrogen will be cheaper than dirty hydrogen. No subsidies needed. Economics alone will force the change. But India stacked another advantage on top. $61 billion in state incentives. The federal government put in $2.3 billion. But Indian states went much bigger. They added $61 billion in extra incentives. That's 26 times more than the federal budget. Seven states provide 92% of this support. Maharashtra gives free transmission for 10 years. Gujarat pays 20% of the cost for hydrogen machines and desalination plants. Power subsidies [music] alone are worth $38 billion. Projects starting before [music] 2030 get 25 years of free transmission. 18 companies have already been approved to make [music] 862,000 tons per year. Here's the smart design. The federal government creates the rules. The states compete to attract projects with bigger incentives. This creates a race where states try to offer better deals. The result is incentives that keep getting bigger. Cheap energy plus massive subsidies reduces costs. But India's next advantage is location. Three special ports that make global exports possible. India picked three special ports for green hydrogen hubs. Kandla in Gujarat, Tuticorin in Tamil Nadu, and Paradip in Odisha. These ports can ship to both Europe and Asia at the same time. Kandla is India's biggest port and sits next to huge oil refineries and chemical plants. Paradip is getting a 797 crore project to build a special jetty for hydrogen and ammonia. Tuticorin connects to Japan, South Korea, and Singapore. Here's the smart part. All three ports put everything in one [music] place. Factories, renewable energy, water supply, customers, and shipping all together. Most countries have to move hydrogen long distances. India makes it right next to where [music] it ships. Transportation costs become almost zero. The ports enable exports. But India's most powerful advantage is the 5 million tons of customers already waiting inside the country. Most countries building green hydrogen have to find customers first. India already has customers. India uses 5 million tons of gray hydrogen every year right now. Oil refineries use it to clean fuel. Fertilizer factories use it to make ammonia for farmers. Steel mills [music] use it to make iron. All of this currently uses dirty fossil fuel hydrogen. Green hydrogen doesn't need to create new customers. It just needs to replace what they already buy. Government estimates show oil and fertilizer alone need 5 million tons. By 2030, total demand could reach 15 to 20 million tons. This is India's most powerful advantage. Other countries build supply and then search for customers. India already knows who will buy it day one. Guaranteed revenue from existing customers. But the export opportunity adds billions more. Europe, Japan, [music] and South Korea are actively looking for the hydrogen India is ready to supply. The world is getting hungry for clean hydrogen. Europe wants 10 million tons per year by 2030. Japan wants 3 million tons. South Korea wants 27.9 million tons by 2050. India has already signed deals with Japan for 412,000 tons. Singapore also signed supply agreements. European and Asian demand could be 3.4 to 6 million tons by 2030. That's an $8 billion export opportunity. In January 2026, India and [music] Europe signed a trade deal that makes hydrogen equipment cheaper. India launched special certificates in 2025 to prove their hydrogen meets European quality standards. Here's the perfect timing. Europe's demand ramps up 2028 to 2030. Exactly when India's production comes online. The supply and demand curves meet at the perfect moment. But none of this works without companies willing to build everything. And India's corporate backing is unprecedented. Three of India's biggest companies have put over $100 billion into green hydrogen. NTPC, Reliance, and Adani. NTPC is building a huge hydrogen hub in Andhra Pradesh with 1.85 lakh crore investment. It will make 1,500 tons per day. Even with all these advantages, India faces big problems. Water shortage is the biggest issue. Making 1 kg of green hydrogen needs 8.92 L of clean water. India already doesn't have enough water in many places. Electrolyzer shortage is another problem. India needs 60 to 100 GW of hydrogen machines. They only have 3 GW awarded so far. Cost is still too high. Green hydrogen costs $3.5 to $5 per kg today. It needs to be under $2 to compete. Storage tanks, pipes, and transport systems are not ready. Only 4% of announced projects have actually started building. But India has solutions for each problem. Gujarat pays for desalination plants. Reliance [music] is building giant hydrogen factories. $61 billion in incentives [music] will bridge costs. The question is whether solutions are moving faster than problems. India's plan works because it has many advantages working together, not just one. If export markets are slow, domestic demand buys everything. If costs drop faster, exports become easier. If one company has problems, others keep going. By 2030, if India achieves just 70% of its target, it will make 3.5 million [music] tons for $7 billion. That replaces dirty hydrogen that costs 7 to 10 billion today. Exports of 1 to 2 million tons would make 4 to 8 billion dollars per year. No other country combines cheap renewable energy with existing customers and strategic ports. India uses strengths it already has instead of betting on things it doesn't have yet. India's green hydrogen plan could win big than any competitor has to stop it. India's plan could win big because it solves five problems at once. >> [music] >> Stop 90 billion in energy imports. Cut 50 million tons of pollution. Create 600,000 jobs. Make billions from exports. And beat fossil fuel prices. No other country's hydrogen plan fixes this many problems together. From the 90 billion energy import problem to the 96 billion solution, you've seen how India could become the world's green hydrogen superpower. This isn't speculation. Every number is real. Subscribe if this changed [music] how you see India's energy future. Which advantage matters most? Cheap renewables, existing demand, or corporate backing?

https://m.youtube.com/watch?v=ZIfc5oh4yBc
How India’s Green Hydrogen Plan Could Win Big! 2,581 views · 1 month ago #GreenHydrogen #IndiaEnergy #CleanEnergy ...more Gigacity Chronicles 4.76K

Video mentions 3 sea ports. Identify best places for floating and land based SWAC and OTEC cooling districts and communities. ++

I’ll treat the three video ports—Kandla, Tuticorin/Thoothukudi, and Paradip—as candidates, then rank them by deep cold-water access, coastline geometry, industrial demand, and practical district-cooling/community use.

Best OTEC/SWAC Answer For The 3 Hydrogen Ports

Video URL preserved: https://m.youtube.com/watch?v=ZIfc5oh4yBc

India’s three recognized green-hydrogen hub ports are Deendayal/Kandla, V.O. Chidambaranar/Tuticorin, and Paradip.

1. Tuticorin / Thoothukudi — Best Overall
Best candidate for floating OTEC, industrial cooling districts, desalination, ammonia, hydrogen, and port-adjacent communities. NIOT already selected an offshore Tuticorin site for a 1 MW OTEC demonstration about 60 km southeast of Tuticorin where 1200 m depth was available.
Verdict: India’s strongest of the three for OTEC + SWAC.

2. Paradip — Best East-Coast Industrial Cooling Candidate
Good for land-based industrial cooling districts if deep-water pipe routing is feasible, especially because Paradip is already being developed for green hydrogen/ammonia cargo with dedicated jetty, storage, pipelines, and handling infrastructure.
Weakness: Bay of Bengal cyclone risk, sediment, river influence, and rougher offshore engineering.
Verdict: Good for heavy-industry cooling; harder than Tuticorin.

3. Kandla / Gulf of Kutch — Weak For OTEC/SWAC
Kandla is excellent for hydrogen, desalination, methanol, ammonia, and port fuel logistics, but the Gulf of Kutch is shallow; sources describe inner/central Gulf depths mostly tens of meters, not near-shore 800–1000 m cold-water access.
Verdict: Great hydrogen hub, poor OTEC/SWAC site.

Better Than All Three For True OTEC Communities
Lakshadweep/Kavaratti is the real proof-of-concept zone: recent reporting describes OTEC/LTTD using warm surface water around 29°C and cold deep water around 5°C from 1000 m, with about a 24°C gradient.

Ranking

1. Tuticorin — best OTEC/SWAC/hydrogen synergy.
2. Paradip — best heavy-industry cooling district candidate.
3. Kandla — hydrogen/desalination only; not good cold-water geography.

Bottom Line
Tuticorin is the “big pipe” winner. Paradip is second if engineered for industrial cooling. Kandla is not the cold-water play.

Latest I can verify

Yes: Tuticorin is still historically the key floating-OTEC site, but the active Indian deployment focus has shifted to Kavaratti, Lakshadweep.

As of March 7, 2026, India’s Ministry of Earth Sciences says NIOT’s first OTEC-powered desalination plant at Kavaratti is nearing civil-construction completion; major process equipment is fabricated; installation is phased; and NIOT is welding a 3.8 km HDPE cold-water pipeline to draw seawater from more than 1,000 m depth.

For Tuticorin/Sagar-Shakthi, the older 1 MW floating plant remains a crucial lesson: closed Rankine/ammonia cycle, 1,200 m depth site, but deep cold-water pipe deployment was the killer problem.

I found a reference that NIOT and Shell collaborated on a floating OTEC design, but not a strong official project-status update showing construction after the 2023 design work.

Bottom line:
Tuticorin = best mainland floating OTEC candidate and historic test site.
Kavaratti = current live Indian OTEC/LTTD deployment path.
The big pipe remains the whole ballgame.