CEWT | Defossilisation – The Next Chapter of the Energy Transition

CEWT | Defossilisation – The Next Chapter of the Energy Transition Article 1: Defossilisation – A New Framework for the Global Energy Transition The global energy transition has largely been framed around one objective: decarbonisation. But carbon itself is not the fundamental problem. Carbon is an essential element of life, industry and many of the fuels and materials on which modern society depends. The deeper problem is the continuous movement of geological carbon into the active carbon cycle. Coal, oil and natural gas contain carbon that has remained underground for millions of years. When these resources are extracted and consumed, additional carbon is introduced into the atmosphere-ocean-biosphere system. That suggests a different way of defining the long-term objective: Defossilisation Defossilisation means progressively reducing—and ultimately eliminating wherever technically and economically possible—the requirement for newly extracted fossil carbon. Follow the carbon Consider the conventional fossil-energy pathway: Geological carbon → extraction → processing → fuel → useful energy → atmospheric CO₂ Most climate policy focuses strongly on the final part of that chain: emissions. Defossilisation asks us to look at the beginning as well. How much new geological carbon must continuously enter the economic system? That question produces a useful physical metric: Fossil carbon entering the system / useful energy or product delivered The objective is to drive that ratio progressively toward zero. This is not an argument against decarbonisation Electrification, renewable electricity, efficiency, batteries, hydrogen, carbon capture and genuine carbon removal can all contribute. The distinction is one of system boundaries. A technology may reduce emissions at one point while still depending elsewhere on fossil extraction, fossil-derived hydrogen, fossil backup power or carbon-intensive supply chains. Defossilisation therefore asks us to examine the whole material and energy pathway. Renewable electricity changes the equation As solar and wind become increasingly competitive, renewable electricity can become more than simply a replacement source of electrons. It can become the primary energy input for entirely new industrial systems. Renewable electricity can directly power equipment. It can produce hydrogen. Hydrogen can provide industrial heat, act as a reducing agent, or react with recovered CO₂ to produce carbon-containing molecules. This introduces another possibility. Instead of continually extracting carbon: Extract → use → emit some applications could increasingly operate through: Recover → reuse → recover with renewable energy continually entering the cycle. Carbon does not necessarily have to disappear This distinction is important. A future energy system may still contain methane, carbon monoxide, carbon dioxide and carbon-based industrial products. The critical question is where their carbon originated and where it ultimately goes. A carbon atom recovered from an industrial process and reused is physically different, from a system-accounting perspective, from introducing another carbon atom from a geological reservoir. This leads from a linear fossil-carbon economy toward a managed circular-carbon economy. Measure before making the environmental claim Defossilisation must also be measurable. For any proposed system we should be able to establish: Fossil carbon entering + recycled carbon circulating + carbon leaving the system alongside the complete energy and water balances. Only after establishing those physical flows should environmental claims be made. That approach becomes increasingly important as regulators, customers, investors and communities demand evidence rather than broad labels such as green, clean or carbon neutral. A technology-neutral framework Perhaps the greatest advantage of defossilisation is that it does not prescribe one technology. If direct electrification provides the lowest-cost reliable pathway with the lowest fossil-carbon requirement, use it. If batteries provide the required storage, use them. Where hydrogen is the appropriate molecule, use hydrogen. Where permanent carbon removal is required, capture and store carbon permanently. And where recovered carbon can provide useful system value without requiring continued fossil extraction, investigate carbon recycling. The test remains the same: How effectively does the complete system reduce its dependence on newly extracted fossil carbon while continuing to provide the energy and materials society requires? That is the proposition behind Defossilisation – The Next Chapter of the Energy Transition. It moves the conversation beyond labels and individual technologies toward something fundamentally physical: Follow the carbon. Measure the fossil-carbon input. Then engineer it toward zero. Clean Energy and Water Technologies Pty Ltd (CEWT) Defossilisation – The Next Chapter of the Energy Transition #Defossilisation #EnergyTransition #CarbonManagement #CircularCarbon #RenewableEnergy #Hydrogen #SystemsEngineering #NetZero #CleanEnergy #CEWT

Why Carbon Recycling Is Becoming Essential for Data Centres and Hard-to-Abate Industries

Why Carbon Recycling Is Becoming Essential for Data Centres and Hard-to-Abate Industries And why CO₂ emissions matter more now than ever before Clean Energy and Water Technologies Pty Ltd (CEWT) The energy transition has focused primarily on changing the source of energy. Carbon Recycling Technology (CRT) asks an additional question: how do we stop extracting new geological carbon and continuously adding it to the natural carbon cycle? 1. Renewable energy is growing rapidly - but the world remains heavily dependent on other energy sources Solar and wind deployment is accelerating rapidly. IRENA reports that the world added a record 692 GW of renewable power capacity in 2025, lifting total renewable power capacity to 5,149 GW. Renewables accounted for 85.6% of total net power-capacity expansion in that year. Yet this rapid growth in the power sector should not be confused with renewables' share of the entire energy system. The Energy Institute reports that renewables, including hydroelectricity, met only around 8% of global energy demand in 2024. Electricity is only one component of world energy use; transport, industrial heat, chemicals, steelmaking and many other applications continue to depend heavily on molecular fuels. This distinction is fundamental: renewable electricity and installed renewable capacity are growing very quickly, while the transition of total global energy demand is much slower. The IEA reports that renewables supplied 32% of global electricity generation in 2024, demonstrating why electricity-share figures cannot be used interchangeably with total-energy-demand figures. The transition therefore cannot be measured simply by the number of gigawatts of solar panels and wind turbines installed. What ultimately matters is how much fossil energy they displace across the entire energy system. 2. Fossil fuels continue to dominate the global energy system Oil, natural gas and coal remain deeply embedded in transportation, electricity generation, industrial heat, steel, chemicals, fertilisers and manufacturing. The Energy Institute reports that global fossil-fuel consumption increased by 7% between 2017 and 2024, while its 2024 Statistical Review put fossil fuels at 81.5% of the global primary-energy mix in 2023. The IEA subsequently reported that demand for oil, gas and coal all increased again in 2024. The precise percentage varies with the energy-accounting methodology, but the conclusion is unchanged: fossil fuels still dominate the global energy system. This explains an apparent contradiction in today's transition: the world can install record amounts of renewable capacity while continuing to consume enormous quantities of fossil fuels. The underlying carbon economy remains largely linear: Geological carbon -> fuel -> energy -> CO₂ -> atmosphere 3. Unabated CO₂ emissions are accelerating climate risk Continuing greenhouse-gas accumulation is changing the climate system and increasing exposure to severe climate impacts. WMO reports that globally averaged atmospheric CO₂ reached 423.9 ± 0.2 ppm in 2024, about 53% above the pre-industrial level of roughly 278 ppm. The increase from 2023 to 2024 was 3.5 ppm, the largest annual rise in the modern observational record. WMO's State of the Global Climate 2025 reports that 2015–2025 were the hottest eleven years on record and that 2025 was the second or third hottest year, around 1.43°C above the 1850–1900 average. It also reports that extreme heat, heavy rainfall and tropical cyclones caused major disruption and devastation, while extreme weather affected millions and caused billions in losses. The central issue is not simply whether a technology is labelled green or low carbon. The deeper question is whether the global economy continues transferring geological carbon into the active carbon cycle. That leads to a fundamental question: How quickly can we stop transferring new geological carbon into the natural carbon cycle? 4. Low-cost renewable electricity does not automatically solve hard-to-abate industry Renewable electricity can now be extremely competitive. But industries such as iron and steel, chemicals, minerals processing and high-temperature manufacturing require combinations of continuous electricity, heat and molecular feedstocks. A steel plant cannot simply operate only when the sun shines or the wind blows. Green iron is a useful example: renewable electricity is essential, but electricity alone does not reduce iron ore. A chemical reducing agent is required. This is why renewable electricity must increasingly be integrated with technologies capable of supplying firm power, heat, hydrogen and molecules. 5. Renewable hydrogen is essential - but hydrogen alone does not close the carbon cycle Electrolysis and renewable-hydrogen projects have expanded considerably around the world. Hydrogen provides something renewable electricity cannot always provide directly: a means of carrying renewable energy into chemical reactions. That makes renewable hydrogen important for steel, chemicals, synthetic fuels and other industrial processes. But producing renewable hydrogen does not, by itself, close the carbon cycle. Where an industrial process continues to require carbon-containing molecules, or where hydrogen is converted into synthetic hydrocarbons using CO₂, another question immediately appears: Where does the carbon come from, and where does it ultimately go? Hydrogen can address an energy-carrier problem. It does not automatically solve the carbon-inventory problem. 6. The missing question is continued fossil-carbon extraction Much of today's decarbonisation discussion concentrates on what happens at the point of emission: capture the CO₂, replace some fuel with hydrogen, electrify the process, offset emissions, or permanently store carbon. All can have legitimate roles. But every tonne of fossil carbon extracted from geological deposits and introduced into the economy adds carbon to the active system. As long as we continuously extract new fossil carbon, use it once and release the resulting CO₂, we maintain a fundamentally linear architecture. This is the problem CRT seeks to address. From a linear carbon economy to a circular carbon economy Carbon Recycling Technology starts from a different premise: do not continuously replace carbon - recycle it. Conventional linear pathway: Geological carbon -> fuel -> energy -> CO₂ -> atmosphere Circular carbon pathway: CO₂ -> recovery -> carbon + renewable H₂ -> fuel -> energy -> CO₂ -> recycle Renewable electricity supplies the primary energy. Electrolysis converts part of that renewable electricity into hydrogen. Hydrogen supplies the energy required to restore captured carbon into useful molecules. Carbon becomes a managed circulating inventory rather than a continuously extracted fossil resource. Why this matters for AI data centres AI data centres are making the firm-power problem increasingly visible. Large computing loads require continuous, high-quality electricity, while grid connection, transmission capacity and renewable variability can constrain the speed at which new facilities are developed. Behind-the-meter generation can address part of this problem, but conventional fossil generation leaves the carbon problem unresolved. An integrated architecture combining renewable electricity, firm generation, useful heat and cooling, CO₂ recovery and carbon recycling could approach the data-centre energy problem as a complete system rather than treating electricity, cooling and emissions separately. Why this matters for hard-to-abate industries Steel, chemicals, cement, minerals processing and other industrial sectors differ substantially, but many share a common requirement for continuous energy, high-temperature heat or molecular feedstocks. The transition therefore cannot be reduced to a simple choice between fossil fuels and renewable electricity. Technologies are also needed to connect the electron economy with the molecular economy. In a carbon-recycling architecture, renewable electricity supplies primary energy, hydrogen transfers renewable energy into chemical reactions, carbon provides a recyclable molecular carrier, and recovered CO₂ closes the carbon loop. The economics: fuel recycling and carbon value The carbon question is increasingly becoming an economic question as well. If recovered carbon can be converted into reusable synthetic natural gas or another useful molecule, recycling can reduce the requirement for continuously purchased fossil fuel. This creates an intrinsic fuel-recycling benefit. A second potential value arises from carbon policy, avoided carbon liabilities or eligible environmental attributes. However, captured and recycled CO₂ should not automatically be assumed to generate a tradable carbon credit. Eligibility depends on the relevant accounting methodology and regulatory framework. For robust financial modelling and banking analysis, the two benefits should therefore be separated: Project value = Power + Cooling/Heat + Fuel-Recycling Benefit + Eligible Carbon Value The project can first be tested without carbon-credit revenue, followed by transparent carbon-price sensitivities. This allows lenders and investors to distinguish intrinsic process economics from policy-dependent upside. Follow the carbon Perhaps the simplest way to evaluate a future energy system is to ask three questions: Where did the carbon come from? Where does it go after energy conversion? Does the system require continuous extraction of new geological carbon? If the answer to the final question remains yes, part of the problem may have been reduced without eliminating the underlying carbon flow. The long-term objective should therefore go beyond reducing emissions intensity. It should progressively stop the transfer of geological carbon into the natural carbon cycle. Conclusion Renewable energy changes where our energy comes from. Renewable hydrogen changes how that energy can be carried. Carbon recycling could change what happens to carbon itself. The next phase of decarbonisation may therefore be about more than capturing carbon. It may be about learning how to stop throwing it away. Evidence note (verified August 2026): The latest authoritative data distinguish sharply between renewable power capacity/electricity and renewables' share of total global energy demand. IRENA reports that 692 GW of renewable power capacity was added in 2025, taking global renewable power capacity to 5,149 GW; renewables represented 85.6% of total net power-capacity expansion. By contrast, the Energy Institute's latest transition tracker reports that renewables including hydroelectricity met around 8% of global energy demand in 2024. Accordingly, this article uses 'around 8%' rather than 'less than 7%' when referring to total global energy demand. Verified sources for public release • Energy Institute, Statistical Review of World Energy / Country Transition Tracker (latest available total-energy-demand comparison): renewables including hydro met around 8% of global energy demand in 2024; fossil-fuel consumption rose 7% from 2017 to 2024. https://www.energyinst.org/statistical-review/energy-transition-tracker • Energy Institute, Statistical Review of World Energy 2026: total energy supply rose 1.7% in 2025 and renewables were the largest source of TES growth. https://www.energyinst.org/exploring-energy/resources/news-centre/media-releases/global-electrification-reaches-tipping-point-as-energy-demand-hits-record-highs-and-regional-paths-diverge • IRENA, Renewable Capacity Statistics 2026: 692 GW of renewable capacity was added in 2025; total renewable power capacity reached 5,149 GW; renewables represented 85.6% of total net capacity expansion. https://www.irena.org/News/pressreleases/2026/Apr/Near-700-GW-Surge-in-2025-Proves-Renewable-Energy-Resilience • IEA, Global Energy Review 2025: renewables supplied 32% of global electricity generation in 2024; demand for oil, natural gas and coal all increased in 2024. https://www.iea.org/reports/global-energy-review-2025/key-findings • WMO, Greenhouse Gas Bulletin No. 21: globally averaged atmospheric CO₂ reached 423.9 ± 0.2 ppm in 2024; the 2023–2024 increase was 3.5 ppm. https://wmo.int/resources/publication-series/greenhouse-gas-bulletin/wmo-greenhouse-gas-bulletin-no-21 • WMO, State of the Global Climate 2025: 2015–2025 were the hottest eleven years on record; 2025 was about 1.43°C above the 1850–1900 average; extreme weather caused major human and economic impacts. https://wmo.int/publication-series/state-of-global-climate/state-of-global-climate-2025

CEWT's CRT for hard to abate industries using 100% renewables

CEWT's Trigen Architecture for Data Centres

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From Fossil Carbon to Circular Carbon: A New Path for AI Infrastructure

From Fossil Carbon to Circular Carbon: A New Path for AI Infrastructure Introduction Artificial Intelligence is rapidly becoming one of the world's largest consumers of electricity. Every new generation of AI models demands more computing power, more cooling, more water, and more reliable energy than the last. As investment in AI accelerates, the debate has largely focused on one question: Where will all this electricity come from? Renewables, nuclear, natural gas, battery storage, hydrogen and grid expansion have all been proposed as the answer. In my view, this is only part of the story. The greater challenge is not simply generating electricity. It is creating an energy system that is reliable, scalable, economically viable, and capable of supporting long-term climate objectives. The Limits of the Current Model Today's energy system remains fundamentally linear. We extract fossil carbon from geological reserves, convert it into useful energy, and release the resulting carbon dioxide into the atmosphere. Even where carbon capture is introduced, the underlying dependence on continuous fossil carbon extraction often remains. This approach has served society well for more than a century, but the unprecedented growth of AI infrastructure invites us to rethink it. Carbon Is a Resource, Not a Waste Product Carbon is not the problem. Carbon is one of the essential building blocks of modern civilisation. It enables fuels, chemicals, materials and countless industrial processes. The challenge is the continual introduction of new fossil carbon into the active carbon cycle. Instead of viewing CO₂ as waste, we should increasingly regard it as a valuable industrial feedstock. From Linear Carbon to Circular Carbon A circular carbon system keeps carbon in productive use. Captured CO₂ can be combined with renewable hydrogen to produce renewable synthetic fuels and chemical feedstocks that are compatible with existing infrastructure. Instead of continuously extracting fossil carbon, we progressively recycle the carbon already circulating within the economy. Hydrogen provides the renewable energy. Carbon becomes the recyclable carrier. Why AI Infrastructure Matters AI data centres require continuous power, high reliability, rapid deployment, efficient cooling, long-term sustainability and predictable operating costs. Meeting these requirements will require more than simply adding renewable generation or building larger grids. It will require integrated energy systems that intelligently combine renewable electricity, dispatchable generation, energy storage, cooling, water management and circular carbon technologies. A New Energy Architecture The future AI campus may combine solar and wind for renewable electricity, battery storage for balancing, firm generation for continuous operation, renewable hydrogen as a clean energy input, circular carbon systems to progressively replace fossil fuels, intelligent power electronics to optimise energy flows, and integrated cooling and water recovery. The objective is not choosing one technology over another. It is designing the right AI Energy Architecture. Carbon Recycling Technology This systems perspective forms the basis of Carbon Recycling Technology (CRT). CRT is not intended to replace renewable energy, batteries or nuclear power. Instead, it integrates with them. Renewable electricity powers hydrogen production, captured carbon is recycled into renewable synthetic methane, and firm, dispatchable energy supports mission-critical operations while progressively reducing dependence on virgin fossil carbon. Looking Beyond Net Zero For AI infrastructure, success should not be measured only by emissions avoided. It should also be measured by how effectively we reduce dependence on fossil carbon while maintaining reliability, affordability and resilience. As AI reshapes the global economy, I believe its energy infrastructure should also reshape our relationship with carbon—from fossil carbon to circular carbon.