From Surplus Renewable Power to 24/7 Industrial Energy

From Surplus Renewable Power to 24/7 Industrial Energy CEWT Carbon Recycling Technology (CRT) The energy transition is rapidly increasing solar and wind generation. But there is a fundamental challenge: Industry operates continuously. Renewable generation does not. At times of high solar or wind generation, electricity can exceed immediate demand and may be curtailed or sold at very low - or even negative - prices. At other times, the same industrial customer may need firm electricity, process heat and hydrogen when renewable generation is insufficient. CEWT's Carbon Recycling Technology (CRT) is being developed to address this mismatch. CRT is designed to use renewable electricity within an integrated carbon-recycling energy system and provide three continuous energy products: 24/7 BASELOAD POWER 24/7 THERMAL ENERGY 24/7 RENEWABLE HYDROGEN The principle is not to compete with renewable electricity. It is to make intermittent renewable energy continuously useful to industry. Renewable electricity provides the primary energy input. Hydrogen provides an important chemical pathway. Carbon is captured and recycled through the CRT loop rather than treating continuous fossil-carbon consumption as the permanent solution. This creates a pathway toward steady defossilisation: progressively replacing dependence on newly introduced fossil carbon while increasing the contribution of renewable energy to continuous industrial operations. The potential applications extend from AI data centres requiring firm power, to green iron and other industrial processes requiring electricity, heat and hydrogen around the clock. The energy transition is therefore not only about producing more renewable electricity. The next challenge is converting abundant intermittent renewable energy into the forms of energy industry needs - reliably, continuously and economically. That is the problem CEWT's CRT is being developed to solve. Clean Energy and Water Technologies Pty Ltd (CEWT) Carbon Recycling Technology - turning intermittent renewable energy into continuous industrial energy. #CarbonRecycling #RenewableEnergy #Defossilisation #GreenHydrogen #GreenIron #DataCentres #IndustrialDecarbonisation #EnergyTransition #FirmPower #CEWT

MOLECULAR ACCOUNTABILITY: NATURE DOES NOT RECOGNISE OUR CARBON LABELS

MOLECULAR ACCOUNTABILITY: NATURE DOES NOT RECOGNISE OUR CARBON LABELS The energy transition has created an expanding vocabulary: fossil carbon, biogenic carbon, renewable carbon, green hydrogen, blue hydrogen, e-methane and carbon-neutral fuels. These classifications can be useful for accounting. But Nature does not recognise them. A CO₂ molecule entering the atmosphere has the same physical properties regardless of whether its carbon originated from coal, natural gas, biomass or synthetic methane. Its origin may change its lifecycle accounting, but it does not change the molecule. This leads to a simple engineering principle: Classify for accounting, but balance according to Nature. Consider biogenic CO₂. Capturing CO₂ from a bioethanol plant and combining it with renewable hydrogen can produce synthetic methane: CO₂ + 4H₂ → CH₄ + 2H₂O But when that methane is ultimately combusted: CH₄ + 2O₂ → CO₂ + 2H₂O the carbon can return to the atmosphere. The fact that the original CO₂ was biogenic does not make the resulting atmospheric CO₂ physically different. The lifecycle benefit depends on the wider carbon cycle—including whether, how completely, and over what period biological systems remove an equivalent quantity of CO₂ again. A forest fire demonstrates the point clearly. Carbon released from burning vegetation is biogenic, but that does not mean the resulting emissions can automatically be regarded as “renewable CO₂.” Restoration of the carbon stock depends upon subsequent forest regeneration, land use, and time. We therefore need to move beyond labels towards Molecular Accountability. For any industrial energy system, ask: Where did the carbon come from? What molecular transformations did it undergo? Where did the carbon ultimately go? And carbon should not be considered alone. Hydrogen, oxygen, and water must also be accounted for. Industrial processes continually transform C, H, and O among CH₄, CO, CO₂, H₂, O₂, and H₂O. The atoms are conserved. The molecules are transformed. Every transformation carries an energy consequence. That brings thermodynamics directly into the discussion. A credible industrial decarbonisation system should therefore demonstrate: Elemental balance → Molecular balance → Energy balance → Exergy balance → Environmental discharge Only after these balances have been closed should we apply economic or environmental classifications. This principle is central to the thinking behind CEWT’s Carbon Recycling Technology (CRT): rather than regarding captured CO₂ simply as a waste requiring disposal, ask whether the carbon can remain within an engineered cycle—captured, transformed, used, and recovered again. Remove the label. Define the boundary.Follow the molecules.Close the balance. Nature will ultimately perform the accounting whether we do it or not. Clean Energy and Water Technologies Pty Ltd (CEWT) #MolecularAccountability #CarbonRecycling #CRT #Decarbonisation #Thermodynamics #CarbonManagement #EnergyTransition #CircularCarbon

Breaking Humanity’s Dependence on Fossil Carbon

Breaking Humanity’s Dependence on Fossil Carbon From a Linear Energy System to a Circular Carbon Economy CEWT Position Paper – Discussion Draft The Central Proposition Humanity is not fundamentally addicted to fossil carbon. Humanity is dependent on reliable energy. The challenge is therefore not merely to replace fossil fuels, but to reproduce the reliability, storability and controllability they provide without continuously extracting carbon from the Earth and releasing it to the atmosphere. 1. Why Fossil Fuels Became Dominant Coal, oil and natural gas are concentrated stores of chemical energy. They can be transported, stored and converted into useful energy when required. Modern industrial civilisation developed around these properties, so dependence on fossil fuels arose for sound engineering and economic reasons. A stockpile of coal, a tank of oil or natural gas held in a pipeline and storage network represents more than a source of energy: it also provides a form of energy storage. This ability to call upon stored chemical energy whenever demand arises has been one of the foundations of dependable industrial power. 2. Where the Problem Arose The central environmental problem is the linear carbon pathway. Carbon accumulated in geological reservoirs over immense periods is extracted, converted into fuel, used for energy and then predominantly released as carbon dioxide into the atmosphere. Geological carbon → Fuel → Useful energy → CO₂ → Atmosphere Every repetition of this pathway requires additional fossil carbon to be extracted. The industrial system therefore combines a highly effective energy system with a fundamentally linear carbon-management system. 3. What Renewable Energy Changes Solar and wind power obtain primary energy without continuously consuming a carbonaceous fuel. This is their fundamental advantage. However, they have a different physical character from stored chemical fuels: sunlight and wind are energy flows rather than fuel stocks. Their output therefore varies with natural conditions. Electricity produced at a particular moment must be consumed, transmitted, stored or converted into another energy carrier. This does not diminish the importance of renewable power; it defines the engineering challenge that accompanies large-scale replacement of conventional fuel-based systems. 4. The Transition Is Larger Than Replacing Generators Replacing fossil generation is not simply a matter of substituting one megawatt of solar or wind capacity for one megawatt of coal or gas capacity. A fuel-based system combines an energy source with a large reservoir of stored chemical energy and controllable conversion equipment. A predominantly renewable system must reproduce the required energy service through a combination of generation, transmission, storage, firming, system control and, where appropriate, conversion into chemical energy carriers. The more meaningful measure of transition is therefore not renewable nameplate capacity alone, but how much dependable fossil-fuel functionality can be replaced. 5. Carbon Is Not the Same as Fossil Carbon Carbon itself is not the problem. It is a naturally occurring element and one of the most useful chemical building blocks in nature and industry. The problem is the continuous introduction of additional geological carbon into the active carbon cycle followed by its disposal as atmospheric CO₂. This distinction allows a different question to be asked: must society eliminate useful carbon-containing molecules, or can it eliminate the linear extraction-and-disposal pathway? 6. From Linear Carbon to Circular Carbon If carbon dioxide produced from methane utilisation is captured and subsequently combined with low-carbon hydrogen to regenerate methane, carbon can in principle be maintained as a controlled circulating inventory rather than continually replenished from geological deposits. CH₄ → Energy + CO₂ → CO₂ capture → H₂ + external low-carbon energy → CH₄ The critical thermodynamic point is that carbon recycling does not create energy. External energy must be supplied to restore the carbon-containing products to a higher chemical-energy state. Renewable electricity, including its conversion into hydrogen, can provide that external energy input. 7. The Role of Carbon Recycling Technology (CRT) Carbon Recycling Technology (CRT) can therefore be presented not as an alternative to renewable energy, but as a system architecture that seeks to use renewable energy to help close the industrial carbon loop. In this framework, renewable energy increasingly becomes the primary external energy input, while recycled methane can serve as a controllable chemical energy carrier. The objective is to retain useful characteristics associated with chemical fuels—storability, transportability and controllable energy release—while progressively reducing dependence on continuous fossil-carbon extraction. 8. Learning from Nature: From Linear Systems to Cycles Natural systems repeatedly circulate matter through interconnected cycles. Industrial civilisation, by contrast, has historically relied heavily on extraction, use and disposal. A durable energy transition can therefore be viewed not only as a change in energy sources, but also as a change in system architecture: from linear material flows toward increasingly circular ones. CRT applies this systems principle specifically to carbon: capture the carbon after use, recycle it within the process where technically and economically practical, and supply the required restoration energy from progressively lower-carbon external sources. Conclusion The objective of the energy transition need not be the elimination of the carbon molecule from industry. It should be the elimination of the linear fossil-carbon pathway. Renewable energy provides the external energy required to help close that loop. Carbon recycling offers a pathway for retaining the advantages of chemical energy carriers while progressively breaking dependence on continuous fossil-carbon extraction. Seen in this way, renewable energy and carbon recycling are not competing philosophies. They can be complementary parts of the same transition: renewable energy supplies the external energy, while circular carbon management seeks to prevent useful carbon from remaining a once-through resource.

The Overlooked Water Cycle in Green-Hydrogen DRI

The Overlooked Water Cycle in Green-Hydrogen DRI Why the water used to make green hydrogen does not simply disappear The transition from natural-gas-based direct reduced iron (DRI) to green-hydrogen DRI is usually discussed in terms of carbon emissions and renewable electricity. But there is another material balance worth examining: water. Hydrogen does not simply disappear when it reduces iron ore. It becomes water. The fundamental chemistry Fe₂O₃ + 3H₂ → 2Fe + 3H₂O For every 3 kmol of hydrogen consumed, 3 kmol of water are produced. On a mass basis, producing 111.69 kg of iron consumes approximately 6.05 kg of H₂ and produces approximately 54.05 kg of H₂O. Therefore, per tonne of iron, the theoretical reduction reaction consumes approximately 54 kg H₂/t iron and produces approximately 484 kg H₂O/t iron. Where did the green hydrogen come from? Green hydrogen is produced by electrolysis. In simplified form: 2H₂O → 2H₂ + O₂ The theoretical water requirement is approximately 9 kg of water for every kilogram of hydrogen produced. Producing the approximately 54 kg of hydrogen theoretically required to reduce one tonne of iron from hematite therefore requires approximately 486 kg of water. The subsequent iron-ore reduction reaction produces approximately 484 kg of water again. The small difference is essentially rounding. So where did the water go? Water → Hydrogen → Iron-ore reduction → Water In the electrolyser, water is split into hydrogen and oxygen. The hydrogen is then used in the DRI shaft furnace to remove oxygen from iron oxide. The reduction reaction recreates water. Inside a hot DRI shaft furnace, that reaction product initially leaves principally as water vapour in the top gas, together with unreacted reducing gases and other components depending on the process configuration. This raises an important engineering question: why should all electrolyser water be regarded as permanently consumed? If the water vapour in the DRI off-gas is cooled and condensed, a substantial portion of the chemically generated water can potentially be recovered. It would require treatment to the quality needed for reuse, and a commercial green-iron plant will still have real make-up-water demand arising from cooling, purification, blowdown and other losses. The point is therefore not that hydrogen-based DRI has zero water demand. Rather, the stoichiometry shows that much of the water directly associated with producing and consuming green hydrogen is not destroyed. It changes chemical form and can potentially participate in a designed water-recovery loop. What does this mean at 0.2 MTPA? For a theoretical production rate of 200,000 tonnes of iron per year, the simplified hematite reduction chemistry corresponds to roughly: • 10,800 tonnes/year of H₂ consumed • 96,800 tonnes/year of H₂O formed by the reduction reaction • Approximately 97 million litres/year of reaction water These are stoichiometric values, not a complete commercial plant water balance. Actual values will depend on ore chemistry, metallisation, hydrogen utilisation, recycle-gas design, operating conditions, cooling systems and water-recovery efficiency. A different way to frame green iron We frequently hear the statement: “Green hydrogen requires enormous quantities of water.” That is directionally correct when describing electrolyser feedwater requirements, but for hydrogen-based iron reduction it is incomplete unless we also ask what happens to the water after the hydrogen has done its job. A large part of it has become water again. Perhaps future green-iron plants should therefore be designed not simply around a hydrogen balance and an energy balance, but around an integrated hydrogen-oxygen-water balance, with water recovery engineered into the process from the beginning.

How CRT Was Born Following Nature’s Carbon Cycle

How CRT Was Born Following Nature’s Carbon Cycle Carbon Recycling Technology (CRT) did not begin with a complicated process simulation or with an attempt to invent another carbon-capture technology. It began with a much simpler question: How does Nature deal with carbon? All life on Earth exists in an intimate relationship with its environment. Human beings, animals, plants, microorganisms, water, atmosphere and soil are not truly independent systems. They form parts of a larger interconnected natural system. Human civilisation sometimes behaves as though the environment is external to us — something that can be consumed, altered or damaged without eventually affecting human life. But if life and its environment are inseparable, degradation of that environment must ultimately return to affect the life that depends upon it. That observation became important in thinking about carbon. Nature Does Not Bury Carbon Nature continuously moves carbon between the atmosphere, oceans, soil and living organisms. Plants provide perhaps the most familiar example. Through photosynthesis, they take carbon dioxide from the atmosphere and, using sunlight and water, incorporate that carbon into carbohydrates and biomass while releasing oxygen. CO₂ + H₂O + solar energy → carbohydrate/biomass + O₂ The important principle is not merely the chemistry. It is the cycle. Carbon is transformed, used and transformed again. Nature therefore suggested a different question to me: Instead of treating carbon dioxide only as a waste product to be captured and disposed of, why not treat it as carbon that has temporarily changed its chemical form? That question eventually led to CRT. From Carbohydrate to Hydrocarbon Human engineering has also attempted to convert captured CO₂ into useful products and fuels. But there is a fundamental distinction between biological photosynthesis and the approach that interested me. Nature principally converts atmospheric carbon dioxide into carbon-containing biological matter such as carbohydrates. For an industrial energy system, I asked whether we could instead convert the carbon dioxide generated from a hydrocarbon back into a hydrocarbon. Consider methane. When methane is oxidised, its carbon becomes carbon dioxide: CH₄ → CO₂ But the carbon atom has not disappeared. It has simply moved from one molecular form to another. If that CO₂ is captured and converted back into methane using hydrogen and suitable process chemistry, the carbon can return to the fuel cycle: CH₄ → CO₂ → CH₄ → CO₂ → CH₄ … This became the fundamental idea behind Carbon Recycling Technology — CRT. A Closed Industrial Carbon Cycle CRT therefore differs conceptually from conventional carbon capture and storage. The objective is not: Extract carbon → use it → capture CO₂ → dispose of it but rather: Use carbon → capture it → chemically regenerate the fuel → use the carbon again. The carbon becomes an internal circulating inventory rather than a continuously consumed resource followed by a continuously generated waste stream. There is another important distinction between CRT and the natural photosynthetic cycle. Plants release oxygen to the atmosphere as part of photosynthesis. CRT is deliberately engineered differently. Where oxygen is produced within the integrated process — for example through water electrolysis — it can be consumed internally where the process requires oxygen. The intention is therefore not to reproduce photosynthesis literally, nor to release oxygen simply because Nature does. CRT takes inspiration from the circular principle of Nature and translates that principle into an engineered thermochemical system. The Idea Became an Engineering Problem Once I saw carbon dioxide in this way, the problem changed completely. The question was no longer simply: “How do we capture CO₂?” It became: “How do we keep the carbon circulating inside an industrial system without continually releasing it to the atmosphere?” That required engineering answers: carbon capture, hydrogen-rich syngas production, methanation, oxygen integration, heat recovery, power generation, water recovery and careful mass and energy balancing. Over time these individual operations developed into the integrated system that I call Carbon Recycling Technology (CRT). The inspiration was Nature. The implementation is engineering. And the underlying principle remains remarkably simple: Carbon does not necessarily have to become waste after we obtain energy from it. It can become a circulating raw material. If we can keep that carbon circulating within the engineered system, the conventional linear relationship between hydrocarbon use and continuous atmospheric CO₂ discharge can potentially be fundamentally changed. That is how CRT was born. “CRT does not attempt to copy Nature’s chemistry. It attempts to learn from Nature’s carbon philosophy.”