Turning Captured CO2 Directly Into Chemicals Could Accelerate Industrial Decarbonization

Electrified technologies that capture carbon dioxide and convert it into valuable chemicals and fuels are widely seen as pillars of the global energy transition, offering a route to low-carbon products that can displace fossil feedstocks. Yet the near-term deployment of these technologies hinges less on laboratory performance records than on how gracefully they integrate with existing industrial infrastructure. A new Perspective published in Nature Energy argues that one emerging approach, known as reactive capture of CO2, may be better positioned for early industrial adoption than many researchers and investors have assumed, provided that a specific set of engineering and materials challenges can be overcome at scale.

Reactive capture of CO2, often abbreviated RCC, departs from the conventional sequence of capturing carbon and then converting it in separate, energy-intensive steps. Instead of regenerating a CO2-rich gas through thermal stripping, RCC feeds CO2-rich liquids, such as hydroxide solutions or amine-based capture solvents, directly into an electrolyser. Inside the cell, the captured carbon is electrochemically reduced at the cathode while the solvent is regenerated or replenished, bypassing the thermal regeneration step that dominates the energy budget and capital cost of traditional capture plants. This process simplification is the central claim of the Perspective, authored by researchers at the University of Toronto in collaboration with scientists at Shell Global Solutions International B.V.

The technical logic is straightforward. In a conventional carbon capture and utilization chain, flue gas is first scrubbed with an absorbent, then heated to release a concentrated CO2 stream, compressed, and finally fed into a gas-fed electrolyser that reduces it to products such as carbon monoxide, syngas, or formate. Each step carries thermodynamic penalties and capital overhead. RCC collapses this chain: the capture solvent itself becomes the electrolyte, and the carbon locked within it is converted directly at an electrode surface. The authors emphasize that this integration can substantially reduce the overall energy demand of combined capture and conversion, a conclusion supported by prior comparative analyses of sequential and integrated capture-conversion pathways.

Perhaps counterintuitively, the Perspective also argues that RCC is more tolerant of the messy realities of industrial emissions than gas-fed electrochemical reduction. Gas-fed CO2 electrolysers are notoriously sensitive to impurities such as oxygen, sulfur oxides, and nitrogen oxides, which poison catalysts and degrade performance. Liquid-fed RCC systems, by contrast, can accommodate these contaminants to a greater degree because the capture solution acts as a buffer and because the electrochemical reduction occurs in the liquid phase. Earlier studies have demonstrated oxygen-resistant and impurity-resistant CO2 reduction when using reactive carbon solutions, a property that matters enormously because real industrial flue gases are never pristine. RCC can also generate high-purity gaseous outputs directly, enabling a fully electrified chemical synthesis process tailored to industrial CO2 feedstocks.

The acknowledged weakness of RCC lies in the maturity of its electrolysers. Gas-fed CO2 electrolysis has attracted the bulk of research investment, and its devices are correspondingly more developed, with larger cell areas, longer demonstration runs, and clearer scale-up pathways. Current RCC electrolysers lag behind in stability and scale, and the Perspective identifies three interlocking barriers that must be addressed before the technology can compete. First, cathodes must be engineered to tolerate capture solvents, which are often alkaline or amine-rich environments that corrode conventional catalyst surfaces or promote competing hydrogen evolution. Recent reports of corrosion and enhanced hydrogen evolution during the electrochemical reduction of ammonium carbamate on transition metal surfaces illustrate the severity of this challenge.

Second, the capture fluids themselves must be reformulated to be compatible with electrolysis. Classic monoethanolamine solvents, the workhorse of post-combustion capture, have been shown to detrimentally affect CO2 electroreduction, binding carbon too tightly and interfering with catalysis. This has spurred the development of alternative solvents, including amino acid-based capture agents, switchable polarity solvents, and hindered alkanolamines whose reaction pathways can be tuned. Studies have demonstrated reactive capture through amino acid solvents and direct carbonate electrolysis into pure syngas, suggesting that a palette of electrolysis-compatible capture fluids is emerging. The authors argue that co-designing the solvent and the electrode, rather than optimizing each in isolation, will be essential for industrial relevance.

Third, the membrane components of RCC electrolysers, particularly bipolar membranes, require major advances in efficiency, scalability, and durability. Bipolar membranes perform voltage-driven water dissociation, supplying protons and hydroxide ions to the respective electrode compartments and enabling pH management that is critical to carbonate and amine electrolysis. However, the efficiency of water dissociation at the membrane junction directly controls cell voltage and thus energy consumption, and reverse-bias operation imposes demands that current commercial membranes struggle to meet. Research into accelerating water dissociation kinetics and understanding the multi-scale physics of bipolar membranes is advancing, but the Perspective stresses that membrane lifetime under industrially relevant current densities remains a decisive unknown.

On the question of economics, the authors evaluate the performance targets that RCC must hit to become cost-competitive with alternative conversion technologies. Techno-economic analyses synthesized in the article compare RCC-derived syngas against conventional syngas production routes such as steam methane reforming and reverse water gas shift, as well as against competing electrified pathways including high-temperature solid oxide co-electrolysis. A crucial insight is that electrolyser energy consumption dominates separation costs in state-of-the-art CO2 electrolysers, which strengthens the case for RCC because it avoids upstream regeneration and compression energy. The Perspective contends that RCC could become viable for early industrial adoption ahead of other electrified routes, and importantly, at present levels of selectivity and voltage, if the stability and scale barriers are resolved. This reframes the technology not as a long-shot requiring scientific breakthroughs but as an engineering problem with a defined solution space.

The target product matters as well. The authors make the case for carbon monoxide, and syngas containing it, as the most practical early product for RCC. Carbon monoxide is a versatile intermediate for Fischer-Tropsch synthesis and other chemical manufacturing routes, and it can be produced from carbonate and amine feeds with relatively high carbon efficiency. Reports of hierarchical and nanoconfined electrode designs that enhance catalyst-CO2 interaction in electrified reactive capture, along with bipolar membrane-integrated cyclic systems that continuously convert flue gas into syngas, indicate that the field is converging on architectures capable of sustained operation. Economically, integrated capture and conversion has been assessed as potentially viable at scale, with carbon-neutral fuels and chemicals from renewable syngas forming an attractive market entry point.

The collaboration between academic electrochemists and industrial scientists is itself significant. The involvement of Shell researchers brings process integration knowledge, solvent handling experience, and a sober assessment of what industrial feedstocks actually contain. Acknowledged support from Shell Global Solutions International B.V., the Canada Research Chairs Program, and Canadian federal research funding signals that both private and public sectors see reactive capture as a candidate for the decarbonized chemical industry of the coming decades. If solvent-tolerant cathodes, electrolysis-compatible capture fluids, and durable high-efficiency bipolar membranes mature in parallel, the authors conclude, RCC could leapfrog more heavily hyped gas-fed routes and deliver fully electrified carbon utilization at the smokestack, converting a liability into feedstock at the point of emission.

Subject of Research: Industrial-scale reactive capture of CO2 and its integration with electrochemical conversion technologies

Article Title: Industrializing reactive capture of CO2

Article References: Xiao, Y. C., Sun, S. S., Miao, R. K., Han, K., Just, P.-E., Corbett, P. J., & Sinton, D. (2026). Industrializing reactive capture of CO2. Nature Energy. https://doi.org/10.1038/s41560-026-02113-7

Image Credits: AI Generated

DOI: 10.1038/s41560-026-02113-7

Keywords: reactive carbon capture, CO2 electrolysis, carbon capture and utilization, bipolar membranes, amine solvents, syngas, electrocatalysis, decarbonization, carbon monoxide, techno-economic analysis, energy transition, Industrializing