Market map: Carbon capture materials (sorbents, membranes) — the categories that will matter next

The U.S. Department of Energy has set a target of reducing carbon capture costs to $30 per tonne of CO2 by 2030, a roughly 75% reduction from the $50 to $120 per tonne that conventional amine scrubbing systems deliver today (DOE, 2024). Reaching that threshold would make carbon capture economically viable across power generation, cement, steel, and direct air capture (DAC) at scale. The materials that enable this cost reduction, spanning advanced sorbents, next-generation membranes, and novel electrochemical systems, represent one of the most consequential technology races in North American climate technology. With over $3.5 billion in federal funding flowing through the Bipartisan Infrastructure Law and Inflation Reduction Act toward carbon management, the competitive landscape for capture materials is shifting rapidly.

Why It Matters

Carbon capture is no longer a niche research concept. The International Energy Agency projects that global CO2 capture capacity must increase from approximately 50 million tonnes per year (Mtpa) in 2024 to over 1 gigatonne per year by 2050 to meet net-zero targets (IEA, 2024). North America currently hosts the majority of announced large-scale capture projects, with over 200 facilities in various stages of development across the United States and Canada.

The bottleneck, however, is not project finance or policy support. It is the performance and cost of the capture materials themselves. Conventional aqueous amine solvents (primarily monoethanolamine, or MEA) dominate installed capacity but carry significant penalties: energy requirements of 3.5 to 4.0 GJ per tonne of CO2 for solvent regeneration, degradation rates that necessitate frequent solvent replacement, and corrosion issues that drive up capital costs. These limitations create a clear opening for next-generation materials that can capture CO2 with lower energy input, higher durability, and greater selectivity.

The DOE's National Energy Technology Laboratory (NETL) estimates that the energy penalty alone accounts for 50 to 80% of total capture cost, making materials innovation the single largest lever for cost reduction. For North American industries facing tightening EPA emissions regulations and growing pressure from the SEC's climate disclosure rules, access to cost-effective capture materials is becoming a strategic imperative.

Key Concepts

Amine-based solvents remain the incumbent technology for post-combustion capture. These liquid solvents absorb CO2 through chemical bonding, then release it when heated. While proven at scale, their high regeneration energy (typically 3.5 to 4.0 GJ per tonne CO2) and solvent degradation rates of 1 to 3 kg per tonne CO2 captured create persistent cost challenges.

Solid sorbents use porous solid materials to adsorb CO2 onto their surfaces, then release it through temperature or pressure changes. They offer the potential for significantly lower regeneration energy (1.5 to 2.5 GJ per tonne CO2) and can operate through thousands of adsorption-desorption cycles. Climeworks, for instance, uses solid sorbent contactors in its DAC plants that can cycle over 5,000 times before replacement.

Metal-organic frameworks (MOFs) are crystalline materials with extraordinarily high surface areas (up to 7,000 m2 per gram) that can be tuned at the molecular level for CO2 selectivity. Their programmable pore geometry enables selectivity ratios exceeding 100:1 for CO2 over nitrogen, far surpassing conventional sorbents.

Polymer membranes separate CO2 from gas mixtures based on differences in permeability. They offer continuous operation (no cycling required), compact footprints, and modularity. The key performance trade-off is between permeability (how fast gas moves through) and selectivity (how well it separates CO2 from other gases), described by the Robeson upper bound.

Mixed-matrix membranes (MMMs) embed nanoparticles, MOFs, or other fillers within polymer matrices to exceed the Robeson bound, combining the processability of polymers with the performance of inorganic materials.

Electrochemical capture uses voltage-driven processes rather than thermal energy to capture and release CO2. These systems can operate at ambient temperature, potentially reducing the energy penalty to below 1.0 GJ per tonne CO2 and enabling integration with renewable electricity.

Market Segments

The carbon capture materials landscape in North America can be mapped across six primary segments:

Post-combustion solvents remain the largest segment by installed capacity. Projects like the Boundary Dam facility in Saskatchewan (operated by SaskPower) and the Petra Nova retrofit in Texas have demonstrated amine-based capture at scale, though both have experienced operational challenges related to solvent management.

Solid sorbents for DAC represent the fastest-growing segment, driven by federal support through the DOE's Regional Direct Air Capture Hubs program, which allocated $3.5 billion across four hub projects in 2024. Climeworks and its North American competitors are scaling solid sorbent contactors designed for atmospheric CO2 concentrations of roughly 420 parts per million.

MOF-based sorbents occupy an earlier-stage but high-potential segment. Several university spinouts and venture-backed startups are advancing MOFs toward commercial deployment, targeting both point-source and DAC applications.

Polymer and mixed-matrix membranes serve primarily the natural gas processing and industrial separation markets today but are increasingly targeting post-combustion CO2 capture. Membrane Technology and Research (MTR) has demonstrated its Polaris membrane in pilot systems capturing CO2 from coal and natural gas flue streams.

Electrochemical swing systems are the most nascent segment, with bench-scale and early pilot demonstrations underway at several research institutions and startups. Verdox, spun out of MIT, is commercializing an electrochemical CO2 capture technology that uses quinone-based electrodes.

Calcium looping and mineral sorbents use calcium oxide (from limestone) to capture CO2 at high temperatures, primarily targeting cement and lime production where the raw material is already present in the process. This segment benefits from low sorbent cost but faces challenges with sorbent sintering and capacity loss over cycles.

Key Players

Established Leaders

Svante — Vancouver-based developer of solid sorbent capture technology using structured adsorbent beds with rapid cycling. Svante's technology targets industrial point sources including cement and hydrogen production. The company secured over $400 million in funding through 2024 and is deploying its first commercial-scale system at a cement plant in partnership with LafargeHolcim.

Carbon Clean — Originally UK-headquartered, now with significant North American operations, Carbon Clean offers its CycloneCC modular capture system using proprietary amine-based solvents (APBS-CDRMax) that reduce the energy penalty by approximately 30 to 40% compared to conventional MEA. The company has deployed systems at over 50 sites globally and raised $150 million in Series C funding in 2024.

Climeworks — Swiss DAC leader with expanding North American presence. Climeworks uses solid sorbent filters that capture CO2 from ambient air and release it at 80 to 100 degrees Celsius, enabling integration with low-grade waste heat. The company's Mammoth plant in Iceland (36,000 tonnes per year capacity) informs the design of larger facilities planned for North America.

Membrane Technology and Research (MTR) — Based in Newark, California, MTR is the leading developer of polymer membranes for gas separation, including CO2 capture. Its Polaris membrane has been tested at the National Carbon Capture Center in Alabama, demonstrating CO2/N2 selectivities above 50 and capture rates exceeding 90% in pilot configurations.

ExxonMobil — The oil major has invested heavily in carbonate fuel cell technology and advanced sorbent research, committing over $15 billion to low-carbon solutions through 2027. ExxonMobil operates a carbon capture portfolio exceeding 9 Mtpa of CO2 captured across its global operations.

Emerging Startups

Verdox — MIT spinout commercializing electrochemical swing adsorption for CO2 capture. Verdox's quinone-based electrode system operates at ambient temperature and can be powered directly by renewable electricity, potentially achieving energy penalties below 1.0 GJ per tonne CO2. The company raised $80 million in Series B funding in 2024.

Mosaic Materials — Berkeley, California startup developing diamine-appended MOFs with cooperative CO2 binding mechanisms that enable sharp adsorption thresholds and low regeneration temperatures. Mosaic's MOFs have demonstrated CO2 selectivity ratios exceeding 200:1 over nitrogen in laboratory testing.

Heirloom Carbon Technologies — Oakland-based company using enhanced calcium looping (limestone-based direct air capture) to pull CO2 from the atmosphere. Heirloom operates a commercial facility in Tracy, California, and received a $600 million award from the DOE's DAC Hubs program in partnership with the South Texas hub.

CarbonCapture Inc. — Los Angeles-based DAC developer using modular solid sorbent systems. The company is deploying Project Bison in Wyoming, targeting 5 Mtpa of CO2 removal capacity at full scale, making it one of the largest DAC projects announced in North America.

Osmoses — MIT spinout developing ultra-thin MOF membranes for gas separation that can be manufactured at scale using roll-to-roll processes. Osmoses has raised over $26 million and targets both carbon capture and hydrogen purification applications.

Investors & Enablers

DOE ARPA-E — The Advanced Research Projects Agency for Energy has funded over $200 million in carbon capture materials research, including programs focused on electrochemical capture (FLECCS), novel sorbents, and membrane technologies.

NETL (National Energy Technology Laboratory) — The DOE's primary research center for carbon capture, providing testing infrastructure at the National Carbon Capture Center and managing the Carbon Capture Simulation for Industry Impact (CCSI2) project.

Breakthrough Energy Ventures — Bill Gates-founded climate venture fund with investments across the carbon capture materials landscape, including Heirloom, CarbonCapture Inc., and Verdox. The fund has deployed over $2 billion across climate technology sectors.

Lowercarbon Capital — Climate-focused venture fund co-founded by Chris Sacca, with investments in DAC and sorbent technology companies including Heirloom and CarbonCapture Inc.

Canada's Clean Resource Innovation Network (CRIN) — Industry-led network that has directed over C$100 million toward carbon capture innovation in the Canadian oil sands and industrial sectors.

Where Value Is Shifting

Three structural shifts are reshaping where value accrues in the carbon capture materials market.

First, value is migrating from bulk chemical solvents toward engineered materials with tunable properties. The amine solvent market, dominated by commodity chemical suppliers, operates on thin margins. By contrast, companies developing proprietary MOFs, advanced solid sorbents, or electrochemical electrode materials can command differentiated pricing and build defensible intellectual property positions. Svante's structured adsorbent technology, for example, integrates the sorbent material with a proprietary contactor architecture, creating system-level value that commodity sorbent suppliers cannot replicate.

Second, the emergence of DAC as a commercial market is creating demand for materials optimized for ultra-dilute CO2 concentrations (approximately 420 ppm). This is a fundamentally different engineering challenge than capturing CO2 from industrial flue gas (typically 4 to 25% CO2 concentration), and it rewards materials with exceptional selectivity and low regeneration energy over those optimized for high throughput.

Third, the 45Q tax credit enhancement under the Inflation Reduction Act (now offering $180 per tonne for DAC with geological storage) has shifted the economics of capture materials. At $180 per tonne, even materials with higher upfront costs can achieve attractive returns if they deliver lower energy penalties and longer operational lifetimes. This policy signal is accelerating private investment into next-generation materials that may not have been economical under previous incentive structures.

Competitive Dynamics

The competitive landscape is defined by a tension between scalability and performance. Amine-based systems benefit from decades of operational experience and established supply chains, but their thermodynamic limitations create a hard floor on cost reduction. Solid sorbents and MOFs offer superior theoretical performance, but manufacturing these materials at the thousands-of-tonnes-per-year scale required for commercial deployment remains a challenge.

Membrane technologies occupy a distinct competitive position because they enable continuous separation without cycling, reducing mechanical complexity and maintenance requirements. MTR's Polaris membrane has demonstrated that polymer membranes can achieve commercially relevant capture rates, and the company's partnership with the National Carbon Capture Center provides critical validation data. The challenge for membranes is achieving sufficient selectivity for post-combustion applications, where CO2 concentrations are relatively low and nitrogen is the dominant gas.

Electrochemical approaches, led by Verdox, represent a potential disruption to the entire thermal-swing paradigm. By using electricity rather than heat, these systems can integrate directly with renewable power sources and avoid the thermodynamic penalties associated with thermal regeneration. However, electrode durability, current density, and manufacturing scale remain open questions that will determine whether electrochemical capture moves from pilot to commercial deployment.

Regional dynamics also matter. Canada's carbon pricing system (currently C$80 per tonne, rising to C$170 by 2030) creates stronger near-term market pull than U.S. policy for industrial capture, while the U.S. DAC Hubs program provides unmatched federal support for direct air capture deployment. Companies that can operate across both markets, such as Svante with its Vancouver headquarters and U.S. project pipeline, are well positioned to capture value from both policy environments.

What to Watch Next

The period from 2025 to 2027 will be decisive for several key technology transitions. Watch for commissioning results from the DOE's four Regional DAC Hubs, which will provide the first large-scale operational data for next-generation sorbent and contactor systems. The performance of Heirloom's calcium looping technology and CarbonCapture Inc.'s modular sorbent systems at pilot scale will signal whether these approaches can meet cost and durability targets.

Membrane technology is approaching an inflection point. If MTR and Osmoses can demonstrate membranes that exceed the Robeson upper bound at commercial scale, the economics of post-combustion capture could shift significantly in favor of membrane-based systems over solvent-based approaches.

Electrochemical capture will likely see its first integrated pilot demonstrations in 2025 and 2026. Verdox's ability to scale its quinone electrode manufacturing and achieve cycle lifetimes exceeding 10,000 cycles will be a critical proof point.

Finally, watch for convergence between enzyme-based capture (using carbonic anhydrase enzymes to accelerate CO2 absorption) and conventional solvent systems. Companies like Saipem and research groups at Lawrence Livermore National Laboratory are exploring enzyme catalysts that could reduce solvent regeneration energy by 20 to 30% while maintaining compatibility with existing plant infrastructure.

FAQ

What is the DOE's cost target for carbon capture, and how does it compare to current technology?

The DOE's Carbon Negative Shot initiative targets a capture cost of $30 per tonne of CO2 by 2030. Current commercial systems using conventional amine solvents operate at $50 to $120 per tonne for point-source capture and $250 to $600 per tonne for direct air capture. Reaching the $30 target will require materials that reduce the energy penalty from 3.5 to 4.0 GJ per tonne (current amine systems) to below 1.5 GJ per tonne, along with sorbent or membrane lifetimes exceeding 10,000 operational cycles. NETL analysis suggests that advanced solid sorbents and electrochemical systems have the highest probability of meeting this target.

How do solid sorbents compare to liquid amine solvents for CO2 capture?

Solid sorbents offer several advantages over liquid amines: lower regeneration energy (1.5 to 2.5 GJ per tonne vs. 3.5 to 4.0 GJ per tonne), elimination of corrosion and solvent degradation issues, and suitability for DAC applications where liquid solvents perform poorly at atmospheric CO2 concentrations. However, liquid amines remain superior in high-throughput industrial applications where CO2 concentrations exceed 10%, and they benefit from mature supply chains and decades of operational data. The competitive outcome will depend on whether solid sorbent manufacturers can achieve production costs below $15 per kilogram while maintaining adsorption capacity above 2 mmol CO2 per gram through thousands of cycles.

What role do membranes play in carbon capture, and what are their limitations?

Membranes enable continuous CO2 separation without the energy-intensive cycling required by sorbent and solvent systems. This gives them inherent advantages in operational simplicity, modularity, and maintenance. MTR's Polaris membrane has demonstrated CO2/N2 selectivities above 50 in pilot testing at the National Carbon Capture Center. The primary limitations are the permeability-selectivity trade-off (described by the Robeson upper bound), sensitivity to flue gas contaminants (SOx, NOx, particulates), and the need for large membrane surface areas when processing high-volume gas streams. Mixed-matrix membranes incorporating MOF nanoparticles are the most promising approach to overcoming the Robeson bound.

What is electrochemical carbon capture, and why is it attracting investor interest?

Electrochemical capture uses voltage rather than heat to bind and release CO2, enabling operation at ambient temperature and direct integration with renewable electricity. Verdox's quinone-based electrode system, for instance, captures CO2 when a voltage is applied and releases concentrated CO2 when the voltage is reversed. This approach can theoretically achieve energy penalties below 1.0 GJ per tonne, roughly one-third of conventional amine systems. Investors are attracted because electrochemical systems decouple capture from fossil fuel heat sources, making them compatible with a fully electrified, renewables-powered grid. The key risks are electrode durability over repeated cycles and the cost of scaling electrode manufacturing.

How does the 45Q tax credit affect the economics of capture materials in North America?

The enhanced 45Q credit under the Inflation Reduction Act provides $85 per tonne for industrial point-source capture with geological storage and $180 per tonne for DAC with geological storage. These credits fundamentally alter the break-even economics for advanced capture materials. A DAC system capturing CO2 at $250 per tonne receives $180 in tax credits, reducing the net cost to $70 per tonne. This makes higher-performance materials with greater upfront costs economically viable if they deliver longer lifetimes or lower energy consumption. The credit is available for projects beginning construction before January 1, 2033, creating a defined window for technology deployment.

Sources

• U.S. Department of Energy. "Carbon Negative Shot." Office of Fossil Energy and Carbon Management, 2024. https://www.energy.gov/fecm/carbon-negative-shot

• International Energy Agency. "CCUS in Clean Energy Transitions." IEA, 2024. https://www.iea.org/reports/ccus-in-clean-energy-transitions

• National Energy Technology Laboratory. "Carbon Capture Technology Program." NETL, 2024. https://netl.doe.gov/carbon-capture

• DOE ARPA-E. "FLECCS Program: Flexible Carbon Capture and Storage." 2024. https://arpa-e.energy.gov/technologies/programs/fleccs

• U.S. Department of Energy. "Regional Direct Air Capture Hubs." Office of Clean Energy Demonstrations, 2024. https://www.energy.gov/oced/regional-direct-air-capture-hubs

• Membrane Technology and Research. "Polaris Membrane for CO2 Capture." MTR, 2024. https://www.mtrinc.com/our-business/carbon-capture/

• Global CCS Institute. "Global Status of CCS Report 2024." 2024. https://www.globalccsinstitute.com/resources/global-status-of-ccs-2024/

• Internal Revenue Service. "Section 45Q Credit for Carbon Oxide Sequestration." IRS, 2024. https://www.irs.gov/credits-deductions/businesses/carbon-oxide-sequestration-credit