Turning CO2 Into Products: Catalysis Offers Industry a Circular Carbon Future

Industrial processes emit vast quantities of carbon dioxide, and a new perspective article argues that the gas should be treated less as a waste product and more as a raw material. Writing in the journal Discover Catalysis, J. González-Arias, J. J. Villora-Picó and T. R. Reina survey the state of catalytic CO2 valorization, the family of technologies that use catalysts to convert captured CO2 into fuels and chemicals. Their assessment, published on 11 November 2025, weighs recent technical advances against the economic, regulatory and infrastructure barriers that still stand between laboratory demonstrations and routine industrial deployment.

The authors frame the problem in familiar terms: industrial activity contributes substantially to greenhouse gas emissions, and climate pressures are pushing companies toward sustainable practices. Catalytic valorization, they argue, offers a dual payoff. Capturing and reusing CO2 can reduce net emissions associated with industrial operations, while the converted products feed a circular economy in which waste carbon becomes a resource. The field has grown visibly: the authors compiled Scopus publication counts from 1998 to 2024 using the keywords catalysis, CO2 and industrial, and the resulting curve shows steadily rising attention to the topic over that quarter-century.

Technologically, the perspective organizes the field into four mainstream routes. Chemical or thermochemical conversion transforms CO2 into methanol, formic acid, dimethyl ether and hydrocarbons through catalytic processes. Electrochemical reduction uses renewable electricity to convert CO2 into carbon monoxide, hydrocarbons and alcohols. Biological conversion enlists microorganisms such as bacteria and algae to produce biofuels and bioplastics, integrating naturally with bioenergy systems. Photocatalytic reduction harnesses sunlight to drive the formation of fuels like methane and methanol. Each pathway occupies a different point on the maturity curve, and the authors stress that readiness varies widely across the portfolio.

Beyond the mainstream, the article catalogs emerging approaches that could serve specific industrial niches. Plasma-assisted processes activate CO2 under mild bulk conditions and respond quickly to intermittent renewable power, making them candidates for flexible operation. Mechanochemical methods such as ball milling have recently achieved nearly quantitative CO2 methanation at temperatures as low as 65 degrees Celsius, offering low-energy alternatives to conventional routes. Solar thermochemical redox cycles use concentrated sunlight to split CO2 directly into carbon monoxide, bypassing electricity-intensive steps. Accelerated mineralization locks CO2 permanently into stable carbonates while simultaneously valorizing industrial wastes such as steel slag or recycled concrete. More exotic media, including liquid metals, molten salts and radiolytic systems, enable unusual CO2-to-solid conversions that resist catalyst deactivation. All of these remain at low technology readiness levels, but the authors argue they broaden the landscape and could complement established routes.

The chemistry itself is demanding. CO2 is a thermodynamically stable molecule, so direct conversion into useful products faces a steep energy barrier, and catalysts are the tools that lower it while improving efficiency and selectivity. The perspective highlights work on CO2 hydrogenation with renewable hydrogen, conversion into C2+ hydrocarbons via bifunctional routes, and methanation over supported metallic catalysts, with nickel the most prevalent active phase. Converting CO2 to ethanol is singled out as harder than methanol synthesis because it requires direct carbon-carbon coupling. Cascade thermochemical methods are attracting growing interest: bifunctional catalysis combining a metal or metal oxide with a zeolite has shown promise for producing high-value compounds in gas-phase CO2 hydrogenation. Catalyst design advances matter too, and the authors cite work showing that hydrophobic surface modification can suppress water-induced side reactions during syngas conversion, cutting CO2 selectivity from nearly 50 percent to below 15 percent and improving overall carbon utilization efficiency.

Deactivation emerges as a central technical challenge, and the article grounds it in quantitative case studies. Catalysts can fail physically through thermal degradation, contamination or attrition, and chemically through impurities poisoning active sites or composition changes. Wolf and colleagues showed that nickel-aluminum catalysts exposed to just 5 parts per million of hydrogen sulfide lost most of their activity within hours, while manganese- and iron-promoted variants extended lifetime by 10 to 20 percent by acting as sacrificial sulfur traps. Song and colleagues demonstrated that iron-based catalysts deactivate mainly by coke accumulation: one catalyst retained 34 percent CO2 conversion and 16 percent C5+ selectivity at 100 hours but fell to 20 percent and 2 percent at 550 hours, as roughly 3.5 millimoles per gram of graphitic carbon deposited on iron carbide sites. Complementary work by Ahmed and colleagues confirmed that particle morphology controls the dominant mechanism, with smaller particles deactivating by carbon deposition while larger ones suffered fragmentation and re-oxidation. The lesson, the authors write, is that nickel and iron catalysts are extremely sensitive to trace poisons and coke buildup, making promoter doping, impurity traps and carbon management strategies essential for industrial operation.

Economics may be the decisive filter. The perspective assembles techno-economic comparisons across three product families. Methanol synthesis currently shows the lowest operating costs, roughly 310 to 590 euros per ton, with a capital expenditure estimate of about 19.27 thousand euros per ton of daily product capacity, reflecting its higher technology maturity; hydrogen production for CO2 hydrogenation can account for up to 73 percent of total cost, and each ton of methanol requires approximately 550 kilowatt-hours and 0.48 to 1.16 tons of steam. Formic acid production is less mature, with capital expenditure estimated at 770 thousand euros per ton of daily product and operating expenses near 770 euros per ton, largely because energy requirements make up 70 to 85 percent of operating costs. Synthetic natural gas sits in between, with a capital expenditure estimate of 970 euros per ton of daily product and production costs of 70 to 160 euros per megawatt-hour, two to seven times higher than fossil natural gas, and viability highly sensitive to electricity prices for renewable hydrogen. On these numbers, the authors conclude, methanol is closest to economic competitiveness, while formic acid and synthetic natural gas need major advances in energy efficiency and capital reduction before large-scale deployment becomes viable.

Policy is beginning to close some of those gaps. In the United States, the Inflation Reduction Act of 2022 expanded the 45Q tax credit to up to 85 dollars per ton for CO2 storage and 60 dollars per ton for utilization. In Europe, the Innovation Fund, worth roughly 40 billion euros by 2030, and the ReFuelEU Aviation mandate, which requires synthetic e-fuels made from CO2 by 2030, create both funding opportunities and guaranteed markets. Meanwhile the EU Emissions Trading System and the new Carbon Border Adjustment Mechanism raise the cost of carbon-intensive imports, incentivizing low-carbon production pathways. Hydrogen costs remain a sticking point: gray hydrogen is cheapest at 1.5 to 2.5 dollars per kilogram but increasingly constrained by carbon pricing, blue hydrogen runs 2.0 to 3.5 dollars per kilogram, and green hydrogen, at 3.5 to 6.0 dollars per kilogram, is dominated by electricity costs that make up about 70 percent of its price. Competitiveness, the authors note, requires renewable electricity below 20 to 30 dollars per megawatt-hour and electrolyzer capital costs, currently 800 to 1700 dollars per kilowatt, falling by 30 to 50 percent as systems scale beyond 100 megawatts.

What distinguishes this perspective from earlier reviews, the authors say, is its emphasis on moving beyond laboratory-scale progress in individual processes toward multidisciplinary collaboration and knowledge transfer. They point to concrete examples: the EU-funded eForFuel project combines electrochemistry, microbiology and chemical engineering to convert CO2 into formic acid that is then transformed into hydrocarbons; the a-leaf consortium is building an artificial photosynthesis platform for solar-to-chemical energy conversion; Sunfire, within the German Kopernikus P2X program, commissioned a 220-kilowatt high-temperature co-electrolysis unit with efficiency above 85 percent on a lower heating value basis, now integrated at the Karlsruhe Institute of Technology to synthesize fuels; and Carbon Recycling International has scaled CO2 hydrogenation from pilot plants to commercial methanol production exceeding 100,000 tons per year. Additional initiatives include Norsk e-Fuel’s renewable aviation fuels partnership, the STORE&GO methanation pilots across Europe, the LEILAC project decarbonizing cement and lime production, and the ongoing Air2Chem project led by Fraunhofer UMSICHT with RWTH Aachen, which integrates direct air capture with carbonate electrolysis to convert atmospheric CO2 into syngas and ethylene.

The authors close with stakeholder-specific priorities. Academia should design robust catalysts with quantifiable lifetimes under realistic feeds and impurities while exploring underexplored routes such as mechanochemical, plasma-assisted and mineralization-based utilization. Industry should scale up integrated systems, particularly in hard-to-abate sectors like steel and cement, implement impurity management and regeneration strategies, and demonstrate multi-megawatt pilot and commercial plants. Policymakers should establish harmonized life cycle assessment and techno-economic assessment standards, effective carbon pricing and clear regulatory frameworks. Computational modelling has a role throughout: the article cites reactor optimization for CO2 methanation at wastewater treatment plants that showed high efficiency and stability, life cycle evaluation of a pilot plant producing light hydrocarbons via methanol, and an integrated methane dry reforming and methanol production scheme at pilot level that lowered costs and reduced the carbon footprint compared with conventional methods. The overall message is that catalytic CO2 valorization is technically real and increasingly well funded, but its transformation of industry depends on solving catalyst longevity, hydrogen affordability and regulatory alignment at the same time.

Subject of Research: Catalytic conversion of captured CO2 into fuels and chemicals for sustainable industrial processes

Article Title: Perspective on sustainable strategies for integrating catalytic CO2 valorization in industrial processes: advances, challenges, and opportunities

Article References: González-Arias, J., Villora-Picó, J. J., & Reina, T. R. (2025). Perspective on sustainable strategies for integrating catalytic CO2 valorization in industrial processes: advances, challenges, and opportunities. Discover Catalysis, 2(1), Article 23. https://doi.org/10.1007/s44344-025-00022-7

Image Credits: AI Generated

DOI: 10.1007/s44344-025-00022-7

Keywords: CO2 valorization, catalysis, carbon capture and utilization, methanol synthesis, catalyst deactivation, techno-economic analysis, green hydrogen, renewable energy, circular economy, industrial decarbonization, carbon pricing, pilot-scale demonstration