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.”

Beyond Decarbonisation: Can We Defossilise Industry?

CLEAN ENERGY AND WATER TECHNOLOGIES PTY LTD (CEWT) Beyond Decarbonisation: Can We Defossilise Industry? LinkedIn Post — CEWT Carbon Recycling Technology (CRT) Platform The energy transition is usually framed around decarbonisation. At Clean Energy and Water Technologies (CEWT), we believe another question deserves attention: Can industry be defossilised without abandoning carbon as a useful process molecule? Carbon itself is not the problem. The problem is continually extracting new fossil carbon, using it once, converting it to CO₂ and releasing it to the atmosphere. CEWT's Carbon Recycling Technology (CRT) is being developed around a different principle: Use carbon → recover carbon → recycle carbon → reuse carbon. In the proposed CRT architecture, carbon-containing process streams are recovered rather than routinely discharged. Where appropriate, CO₂ is separated, reacted with hydrogen through methanation, and returned as methane to the industrial energy and process system. The objective is therefore not simply carbon capture. It is carbon recycling. One platform — multiple industrial pathways Power generation Oxy-combustion can produce an exhaust dominated by CO₂ and H₂O. Condense the water, recover the CO₂, convert it back to methane using hydrogen, and recycle the carbon-containing fuel. AI and data centres The challenge facing data centres is increasingly not merely access to renewable electricity, but access to reliable, continuous power at scale. CRT could potentially provide a firm-power platform complementing renewable generation, storage and grid supply. Cement Cement is particularly important because CO₂ comes from both fuel combustion and limestone calcination: CaCO₃ → CaO + CO₂. Instead of treating this process CO₂ only as a waste stream requiring disposal, CRT creates the possibility of treating recovered CO₂ as a carbon feedstock for recycling, subject to the required hydrogen and energy balance. Glass High-temperature glass furnaces present another potential application. Oxy-fuel operation can avoid much of the nitrogen dilution associated with air combustion, creating a more concentrated CO₂/H₂O exhaust stream suitable for downstream recovery and recycling. Aluminium Primary aluminium requires enormous quantities of continuous electricity. A CRT-based firm-power system could potentially complement renewable electricity and storage in supporting continuous smelter operation. The aluminium process itself presents additional carbon challenges that must be addressed separately. Caustic soda and chlor-alkali Chlor-alkali production is electricity intensive but also produces hydrogen as a coproduct. That hydrogen creates an especially interesting opportunity for integration with a carbon-recycling energy system. Solar-grade silicon and polysilicon The solar industry itself has an industrial-energy challenge. Production of metallurgical silicon and subsequent purification to solar-grade material involves high-temperature and energy-intensive processing. CRT could potentially contribute firm low-emission energy and carbon-management integration to this upstream solar-PV supply chain. From a technology to an industrial platform The individual process configuration will necessarily be different for every industry. CRT does not mean that one flowsheet can simply be copied from a steel plant into a cement kiln, aluminium smelter or silicon facility. Each application requires its own: mass balance → energy balance → carbon balance → hydrogen balance → oxygen balance → water balance → economics But the underlying philosophy remains the same: do not continually introduce new fossil carbon when the carbon already circulating within an industrial system can potentially be recovered and reused. That is what CEWT means by defossilisation. Extract → Burn/Process → Emit ↓ Use → Recover → Transform → Reuse Our current work on Green Iron + CRT baseload power is one application of this broader platform. The longer-term opportunity may extend across power generation, AI data centres, cement, glass, aluminium, chlor-alkali, desalination and the solar-PV manufacturing supply chain. Keep the carbon molecule working — without continually extracting another fossil carbon molecule from the ground. CEWT — Clean Energy Without Trash #CarbonRecycling #Defossilisation #CRT #GreenIron #GreenSteel #Cement #DataCentres #AIInfrastructure #Aluminium #Glass #ChlorAlkali #SolarPV #Polysilicon #CleanEnergy #IndustrialDecarbonisation #CircularCarbon #EnergyTransition

CRT: An Australian Technology Platform for the Next Generation of Green Iron

CRT: An Australian Technology Platform for the Next Generation of Green Iron Clean Energy and Water Technologies Pty Ltd (CEWT) Australia’s Opportunity Australia has some of the world’s largest iron ore resources and some of the world’s best renewable energy resources. The opportunity is not simply to export both. The greater opportunity is to bring them together and convert more Australian iron ore into higher-value, lower-emissions iron products in Australia. Clean Energy and Water Technologies Pty Ltd (CEWT) is developing Carbon Recycling Technology (CRT) as a single integrated energy platform designed to help make that possible. Green Iron Needs More Than Hydrogen Much of the discussion about green iron understandably focuses on hydrogen. Hydrogen is essential, but an industrial ironmaking facility requires more than a hydrogen supply. Continuous iron production requires three fundamental energy services: 24/7 firm electrical power, high-temperature process energy, and a reliable reducing gas such as hydrogen-rich syngas. Renewable electricity can produce hydrogen through electrolysis. However, large industrial facilities must also operate continuously through periods when wind and solar generation fluctuate. CEWT’s approach is therefore to integrate renewable electricity, hydrogen production, carbon recycling, synthetic fuel, firm power generation and thermal-energy recovery within a common technology platform. Carbon as a Circulating Process Material CRT starts from a different way of looking at carbon. Rather than continuously extracting fossil carbon, using it once and releasing the resulting carbon dioxide to the atmosphere, CRT seeks to maintain carbon as a managed circulating inventory within the industrial energy system. For iron reduction, hydrogen-rich syngas containing hydrogen and carbon monoxide can be used as the reducing gas. Hydrogen removes oxygen from iron oxide and forms water. Carbon monoxide removes oxygen from iron oxide and forms carbon dioxide. Instead of treating that carbon dioxide simply as a waste stream requiring disposal, CRT is designed to recover it and return the carbon to the energy and reducing-gas cycle. Conceptually: CO → CO₂ → recovery → synthetic methane → reforming → hydrogen-rich syngas → CO. Renewable hydrogen provides the continuing external reducing-energy input, while carbon is progressively recycled through the process. This is the central distinction between carbon capture and carbon recycling. One Platform — Multiple Energy Functions CRT is not being developed solely as a green-iron process. It is being developed as a common industrial energy platform capable of supporting several applications from substantially the same core architecture. 24/7 Firm Power Renewable electricity can be converted into hydrogen and combined with recovered carbon dioxide to produce synthetic fuel. That fuel can provide dispatchable power when renewable generation is unavailable, with the resulting carbon dioxide recovered again for recycling. The objective is to convert variable renewable energy into firm, controllable 24/7 energy. Data Centres The same architecture can be configured behind the meter for data centres. In this application, CRT can potentially provide continuous electrical power while recovering thermal energy for integration with cooling systems. Instead of treating electricity generation and cooling as unrelated infrastructure, they can be designed as an integrated energy system. Green Iron For ironmaking, CRT can potentially provide the three energy services required by a continuously operating DRI facility: firm electricity, process thermal energy and hydrogen-rich reducing gas. Carbon dioxide arising from the reducing gas, residual carbon dioxide within the process gas and recoverable carbon dioxide from carbon-containing process-heating fuels can be directed back into the common carbon-recycling system. The objective is therefore not merely to capture carbon. It is to follow the carbon and keep using it. Retrofitting Existing Iron and Steel Plants One of the potentially important applications of CRT is not only the development of new greenfield green-iron plants, but also the progressive decarbonisation of existing iron and steel facilities. Around the world, substantial industrial infrastructure already exists for iron and steel production, including plants that use natural gas and other carbon-containing fuels. These facilities represent major investments in furnaces, utilities, material handling, power infrastructure, land and skilled workforces. Rather than assuming that all of this infrastructure must ultimately be replaced, CEWT believes an important question should be examined: Can existing iron and steel plants be progressively integrated with renewable electricity, hydrogen production, carbon recovery and recycled synthetic fuels? CRT is being developed with this potential retrofit pathway in mind. Where natural gas is presently used as a fuel or process-energy source, the resulting recoverable CO₂ could potentially become an input to the CRT carbon-recycling system. Instead of the conventional linear pathway — Natural gas → industrial process → CO₂ → atmosphere — CRT seeks to establish a circular pathway: Recycled synthetic fuel → industrial process → CO₂ recovery → renewable H₂ + methanation → regenerated synthetic fuel → industrial process. The objective is therefore to progressively substitute the continuous consumption of new fossil carbon with a managed circulating carbon inventory, while renewable electricity and renewable hydrogen provide the continuing external energy inputs. The exact retrofit configuration would necessarily depend on each plant’s existing process technology, gas composition, furnaces, heat requirements, emissions sources and infrastructure. However, if technically and commercially demonstrated, this approach could provide an important additional pathway for industrial decarbonisation: preserving valuable existing industrial assets while progressively changing the way their energy and carbon are supplied and managed. From Australian Renewable Energy to Australian Green Iron Australia already exports enormous quantities of iron ore. Australia also has extraordinary renewable-energy resources. The next industrial opportunity is to combine those advantages. Rather than considering renewable electricity, hydrogen, firm power, industrial heat, and green iron as separate industries, CRT seeks to integrate them into a common system. Australian renewable energy → Renewable hydrogen → CRT carbon recycling and synthetic energy carriers → 24/7 power + process heat + hydrogen-rich reducing gas → Australian iron ore → Australian green iron. CEWT is developing CRT around a simple principle: Carbon does not necessarily have to be a disposable fuel. It can become a managed material circulating within an integrated energy system. If that principle can be demonstrated technically and commercially at industrial scale, it could provide Australia with another pathway for converting its renewable-energy and mineral advantages into higher-value manufacturing. One Australian technology platform. Multiple industrial applications. One objective: keep the energy productive and keep the carbon circulating. Important notice: CEWT is developing Carbon Recycling Technology (CRT) and progressing its engineering, intellectual-property, and technology-partner development. References to potential industrial applications and retrofits describe areas being investigated and should not be interpreted as completed engineering assessments of specific third-party facilities. # Green Iron Investment Fund Grant@ Green Iron # Carbon Recycling technology# # Industrial Decarbonisation # Australian Innovation # Defossilisation