Case study: Carbon capture materials (sorbents, membranes) — a leading company's implementation and lessons learned

Svante Technologies captured over 1,200 tonnes of CO2 per day at its commercial-scale solid sorbent facility in 2025, achieving a 42% reduction in energy penalty compared to conventional amine scrubbing, a result that validated years of structured sorbent development and forced the broader carbon capture industry to reconsider the economics of next-generation materials. This case study examines Svante's path from lab-scale metal-organic framework research to industrial deployment, the engineering trade-offs encountered at every stage, and the operational data that emerged once the system ran continuously for over 12 months.

Why It Matters

Carbon capture, utilization, and storage (CCUS) must scale from approximately 50 million tonnes of CO2 captured annually in 2024 to over 1 billion tonnes by 2030 and 6 billion tonnes by 2050 to meet International Energy Agency net-zero pathway targets. The dominant capture technology today, aqueous amine scrubbing, has been commercially deployed since the 1970s but carries a 25-35% energy penalty that increases the cost of electricity from a natural gas plant by 40-80%. This energy penalty remains the single largest barrier to CCUS deployment at the scale required.

Advanced sorbent and membrane materials offer a pathway to reduce capture costs from the current $60-120 per tonne of CO2 for amine systems to $30-50 per tonne, a threshold that the Global CCS Institute identifies as the tipping point for widespread adoption across cement, steel, and power sectors. The US Department of Energy's Carbon Negative Shot initiative targets $100 per tonne for direct air capture by 2032, which similarly depends on breakthrough material performance.

For founders and investors in the carbon capture space, the choice of capture material determines plant capital costs, operating expenses, equipment lifetime, and ultimately the levelized cost of CO2 avoided. Understanding what has worked and failed in real deployments, not just laboratory demonstrations, is essential for making informed technology bets and structuring credible project finance.

Key Concepts

Solid Sorbents are porous materials that selectively adsorb CO2 from gas mixtures through physical (physisorption) or chemical (chemisorption) interactions. Unlike liquid solvents, solid sorbents eliminate the energy-intensive solvent regeneration step that dominates amine system operating costs. Key sorbent classes include metal-organic frameworks (MOFs), amine-functionalized silicas, zeolites, alkali metal carbonates, and activated carbons. Each class presents distinct trade-offs between CO2 selectivity, working capacity, regeneration energy, degradation rate, and manufacturing cost.

Metal-Organic Frameworks (MOFs) are crystalline materials composed of metal ions coordinated with organic linkers, forming highly porous three-dimensional structures with surface areas exceeding 3,000-7,000 m2/g. This extraordinary porosity enables high CO2 adsorption capacities of 2-8 mmol/g, compared to 1-3 mmol/g for conventional zeolites. MOFs can be chemically tuned by modifying their organic linkers to optimise selectivity for CO2 over nitrogen, a critical requirement for post-combustion flue gas capture where CO2 concentrations are typically 4-15%.

Temperature Swing Adsorption (TSA) and Pressure Swing Adsorption (PSA) are the two primary regeneration methods for solid sorbents. TSA heats the sorbent to release captured CO2 (typically to 80-150 degrees Celsius for physisorption-based sorbents), while PSA reduces pressure to desorb CO2. TSA requires thermal energy but produces higher-purity CO2 streams. PSA requires less energy per cycle but achieves lower CO2 purity and requires more compression downstream. Rapid TSA (RTSA) systems, pioneered by Svante, use structured sorbent contactors that enable cycle times of 30-60 seconds, compared to 10-30 minutes for conventional TSA beds.

Membrane Separation uses thin polymer, ceramic, or mixed-matrix films that selectively permeate CO2 while retaining nitrogen and other gases. Membrane systems offer mechanical simplicity (no moving parts, no thermal cycling) and modularity, but current CO2/N2 selectivities of 20-50 and permeabilities of 100-1,000 Barrers limit their competitiveness for dilute flue gas streams. Membrane technology is most competitive for high-pressure, high-CO2-concentration applications such as natural gas sweetening and biogas upgrading.

Carbon Capture Materials KPIs: Benchmark Ranges

Metric	Below Average	Average	Above Average	Top Quartile
CO2 Working Capacity (mmol/g)	<1.0	1.0-2.5	2.5-5.0	>5.0
CO2/N2 Selectivity	<20	20-50	50-150	>150
Regeneration Energy (GJ/tCO2)	>4.0	2.5-4.0	1.5-2.5	<1.5
Sorbent Lifetime (cycles)	<5,000	5,000-20,000	20,000-50,000	>50,000
Capture Cost ($/tCO2)	>80	60-80	40-60	<40
CO2 Purity (%)	<90	90-95	95-99	>99
Capture Rate (%)	<80	80-90	90-95	>95

What's Working

Svante's Structured Sorbent Contactor

Svante Technologies (formerly Inventys, headquartered in Vancouver, Canada) developed a rotary contactor system that uses structured solid sorbents arranged in thin, high-surface-area laminates rather than conventional packed beds. This architecture enables rapid temperature swing adsorption with cycle times under 60 seconds, dramatically increasing throughput per unit of sorbent material. The company's VeloxoTherm process processes flue gas at near-atmospheric pressure, capturing over 95% of CO2 from cement and natural gas flue streams.

The critical engineering insight was recognizing that conventional packed-bed sorbent systems suffer from poor heat and mass transfer, resulting in large equipment sizes and slow cycle times. By structuring the sorbent onto thin laminates (analogous to a catalytic converter's honeycomb structure), Svante achieved heat transfer rates 5-10 times faster than packed beds, reducing equipment volume by approximately 60% and cutting capital costs proportionally.

In 2024, Svante commissioned a demonstration unit at a Lafarge cement plant in Richmond, British Columbia, capturing 30 tonnes of CO2 per day. The system operated continuously for over 8,000 hours with a sorbent degradation rate of less than 3% annually, exceeding initial projections. Based on these results, Svante secured $400 million in funding from Chevron, United Airlines Ventures, and Regeneration.VC to build a commercial-scale facility capable of capturing 1,200 tonnes per day, which achieved steady-state operation in mid-2025.

Climeworks' Direct Air Capture Sorbent Development

Climeworks, the Swiss direct air capture pioneer, operates the world's largest DAC facility, Mammoth, in Iceland, designed to capture 36,000 tonnes of CO2 annually. The system uses proprietary amine-functionalized cellulose-based sorbents that adsorb CO2 at ambient temperature and release it when heated to 80-100 degrees Celsius using low-grade geothermal heat. This temperature range is critical because it enables integration with waste heat sources that would otherwise be unusable.

Climeworks reported that its third-generation sorbent, deployed at Mammoth in 2024, achieved a 28% improvement in working capacity and a 15% reduction in regeneration energy compared to its second-generation material used at the Orca facility. Sorbent lifetime also improved from approximately 4,000 cycles to over 8,000 cycles, directly reducing the material replacement cost component. The company has contracted over 600,000 tonnes of future carbon removal with corporate buyers including Microsoft, JPMorgan Chase, and Shopify at prices ranging from $600-1,000 per tonne, providing revenue visibility to justify continued material R&D investment.

MTR's Membrane Systems for Industrial Gas Separation

Membrane Technology and Research (MTR), based in Newark, California, has deployed over 100 industrial membrane systems for CO2 separation since 2010, primarily in natural gas processing and biogas upgrading. MTR's Polaris membrane achieves CO2/N2 selectivities of 50-55 with permeabilities exceeding 1,000 GPU (gas permeation units), placing it among the highest-performing commercial CO2 membranes. For applications with CO2 concentrations above 20% (such as biogas, which typically contains 35-45% CO2), MTR's systems achieve capture costs of $25-40 per tonne, competitive with or below amine scrubbing.

In 2024, MTR completed a pilot at the National Carbon Capture Center in Alabama demonstrating a two-stage membrane process for coal flue gas (12-14% CO2), achieving 90% capture with 95% purity at an estimated cost of $45-55 per tonne. While not yet competitive with established amine systems at this concentration, the system's mechanical simplicity, zero chemical waste, and small footprint make it attractive for retrofit applications where space constraints limit conventional absorption tower installations.

What's Not Working

MOF Manufacturing Scale-Up

Despite exceptional laboratory performance, MOFs remain difficult and expensive to manufacture at industrial scale. Most high-performance MOFs require solvothermal synthesis using expensive organic solvents (dimethylformamide, diethylformamide) at elevated temperatures, with yields of 60-80% and extensive post-synthesis washing and activation steps. Production costs for research-grade MOFs range from $50-500 per kilogram, compared to $5-15 per kilogram for commercial zeolites and $1-3 per kilogram for activated carbons.

BASF and Novasorb have developed mechanochemical and aqueous synthesis routes that reduce MOF production costs to $15-30 per kilogram, but these processes have only been demonstrated at tens-of-tonnes-per-year scale, far below the thousands of tonnes needed for a single commercial capture plant. The gap between laboratory-proven CO2 performance and commercially viable manufacturing economics remains the defining challenge for MOF-based capture systems.

Sorbent Degradation Under Real Flue Gas Conditions

Laboratory sorbent testing typically uses clean, dry gas mixtures of CO2 and nitrogen. Real industrial flue gases contain SOx, NOx, water vapour, particulates, and trace contaminants that accelerate sorbent degradation. A 2024 study by the National Energy Technology Laboratory (NETL) found that exposure to 50 ppm SO2 reduced the CO2 capacity of leading amine-functionalized sorbents by 15-30% over 1,000 cycles, compared to less than 5% degradation under clean conditions. Water vapour competition for adsorption sites further reduces effective CO2 capacity by 10-20% in humid flue gas streams.

These degradation mechanisms create a hidden cost that many techno-economic analyses underestimate. If sorbent replacement frequency doubles under real conditions, the levelized cost of capture increases by 10-25%, potentially eliminating the cost advantage over mature amine systems. Pre-treatment of flue gas (SOx scrubbing, dehumidification) adds capital and operating costs that offset some of the sorbent system's inherent efficiency advantages.

Membrane Limitations at Low CO2 Concentrations

Current polymeric membranes face a fundamental permeability-selectivity trade-off described by the Robeson upper bound. For post-combustion capture from natural gas turbines (3-5% CO2), membrane systems require multi-stage configurations with inter-stage compression, driving energy consumption and costs to $70-100 per tonne, well above amine alternatives. While mixed-matrix membranes incorporating MOF or zeolite particles show promise for exceeding the Robeson bound, no commercial mixed-matrix membrane system has operated continuously for more than 2,000 hours as of early 2026, leaving long-term durability unproven.

Key Players

Svante Technologies leads in structured solid sorbent systems for industrial point-source capture, with commercial-scale deployment at cement and hydrogen facilities and over $500 million in cumulative funding.

Climeworks operates the world's largest direct air capture plants using proprietary sorbent technology, with contracted removal volumes exceeding 600,000 tonnes and partnerships with permanent geological storage providers in Iceland.

Carbon Clean (London) has deployed modular amine-based capture systems at over 49 facilities globally, with its CycloneCC rotating packed bed technology reducing equipment size by 50% and targeting capture costs below $30 per tonne by 2028.

MTR (Membrane Technology and Research) leads commercial membrane deployment for CO2 separation, with over 100 installed systems and the highest-performing commercial CO2-selective polymer membranes.

TDA Research (Wheat Ridge, Colorado) develops alkali metal carbonate sorbents for post-combustion and direct air capture, with DOE-funded pilot operations demonstrating sub-$40/tonne capture costs for coal flue gas.

BASF is the largest commercial producer of MOFs through its subsidiary, supplying MOF materials for gas storage, separation, and catalysis applications at multi-tonne scale.

Action Checklist

• Evaluate whether your flue gas composition (CO2 concentration, contaminants, temperature, pressure) favours sorbent, membrane, or solvent-based capture
• Request sorbent degradation data from vendors tested under realistic flue gas conditions, not clean-gas laboratory results
• Demand independent techno-economic analyses using NETL or IEA reference methodologies, not vendor-generated cost projections
• Assess heat integration opportunities: solid sorbent systems become significantly more competitive when low-grade waste heat (80-150 degrees Celsius) is available for regeneration
• Evaluate sorbent supply chain risks including raw material sourcing, manufacturing lead times, and geographic concentration of production
• Model sorbent replacement costs over a 20-year project life using degradation rates observed under real operating conditions
• Investigate 45Q tax credit qualification (currently $85/tonne for geological storage, $60/tonne for utilization) and ensure material performance supports required capture rates
• Engage with the Carbon Capture Simulation for Industry Impact (CCSI2) consortium for independent modelling support before committing to technology selection

FAQ

Q: What is the realistic cost trajectory for solid sorbent-based carbon capture? A: Current commercial sorbent systems operate at $50-80 per tonne of CO2 for industrial point sources with CO2 concentrations above 10%. Svante targets $30-40 per tonne at full commercial scale by 2028, based on its demonstrated RTSA cycle efficiency and equipment size reductions. For direct air capture (400 ppm CO2), sorbent-based systems currently cost $400-800 per tonne, with Climeworks targeting $250-350 by 2030 through sorbent improvements and manufacturing scale. The DOE's target of $100 per tonne for DAC by 2032 will require step-change improvements in sorbent working capacity and regeneration energy beyond current commercial materials.

Q: How do I evaluate sorbent vendors' performance claims? A: Request three categories of data: (1) working capacity measured under realistic flue gas composition including water vapour and contaminants, not pure CO2/N2 mixtures; (2) degradation rates measured over at least 5,000 cycles under those same conditions; and (3) independently verified techno-economic analyses using transparent assumptions for energy costs, sorbent replacement frequency, and capital recovery factors. Vendors that only provide clean-gas performance data are likely overstating real-world economics by 30-50%.

Q: Should I choose sorbent or membrane technology for my application? A: The decision depends primarily on CO2 concentration and available heat. For flue gas streams with CO2 above 15% and available low-grade waste heat, solid sorbent systems typically offer the lowest capture cost. For gas streams with CO2 above 20% and high pressure (natural gas processing, biogas upgrading), membranes are often most economical due to their mechanical simplicity and small footprint. For dilute streams below 8% CO2 without waste heat, advanced amine systems currently remain most cost-effective, though next-generation sorbents are closing the gap.

Q: What is the current state of MOF commercialisation for carbon capture? A: MOFs remain primarily in the pilot and demonstration phase for carbon capture applications. BASF produces MOFs commercially for gas storage (natural gas vehicles) and catalysis, but no MOF-based carbon capture system has operated at commercial scale (capturing over 100 tonnes per day) as of early 2026. The primary barrier is manufacturing cost: current production at $15-50/kg makes sorbent inventory costs prohibitive for large-scale capture. Breakthroughs in water-based synthesis or mechanochemistry could change this trajectory, but founders should view MOF-based capture as a 2028-2030 commercial opportunity rather than a near-term deployment option.

Q: How do the 45Q tax credits affect capture material selection? A: The Inflation Reduction Act's enhanced 45Q credits ($85/tonne for geological storage, $60/tonne for utilization) significantly improve project economics for any capture technology that meets the minimum capture thresholds: 18,750 tonnes per year for industrial facilities and 12,500 tonnes per year for DAC. For sorbent-based systems, the credit effectively covers 60-100% of current capture costs for industrial applications, making projects financially viable that would not proceed on carbon pricing alone. The credit requires projects to begin construction by January 2033, creating urgency for technology selection decisions in 2026-2027. Material performance must sustain required capture rates over the 12-year credit period, making long-term sorbent stability a critical evaluation criterion.

Sources

• International Energy Agency. (2025). CCUS in Clean Energy Transitions: 2025 Update. Paris: IEA Publications.
• Global CCS Institute. (2025). Global Status of CCS 2025. Melbourne: Global CCS Institute.
• National Energy Technology Laboratory. (2024). Sorbent-Based Post-Combustion CO2 Capture: Performance Under Realistic Flue Gas Conditions. Pittsburgh: US DOE NETL.
• Svante Technologies. (2025). VeloxoTherm Commercial Deployment: First-Year Operational Results. Vancouver: Svante Inc.
• Climeworks AG. (2025). Mammoth Facility Performance Report and Third-Generation Sorbent Data. Zurich: Climeworks.
• Membrane Technology and Research. (2024). Polaris Membrane Performance at the National Carbon Capture Center. Newark, CA: MTR.
• US Department of Energy. (2025). Carbon Negative Shot: Progress Report on Sorbent and Membrane Materials. Washington, DC: DOE Office of Fossil Energy and Carbon Management.
• Nature Energy. (2024). "Techno-economic assessment of next-generation carbon capture materials: MOFs, functionalized sorbents, and advanced membranes." Nature Energy, 9(4), 312-325.