Membrane Technology & Research (MTR) has raised $27 million in a funding round led by Climate Investment to push its membrane-based carbon capture technology toward commercial scale. The company also appointed a new CEO to lead the next phase of growth. It’s a meaningful vote of confidence in a technology approach that often gets overshadowed by the solvent and sorbent methods dominating carbon capture headlines.

Why it matters

Most carbon capture conversations center on chemical solvents or solid sorbents to grab CO2 from gas streams. Membrane-based separation is a different animal. It uses thin polymer films that selectively allow CO2 to pass through while blocking other gases. The appeal is straightforward: membranes can be modular, require less energy than heating up solvents, and avoid some of the chemical handling headaches. A $27 million raise signals that serious climate-focused investors see membranes as more than a lab curiosity.

The details

MTR isn’t a startup in the traditional sense. The company, based in Newark, California, has been developing gas separation membranes for decades, with applications across natural gas processing, petrochemical refining, and vapor recovery. Its Polaris membrane, designed specifically for CO2 capture, has been tested at pilot scale on flue gas from power plants and industrial facilities. Climate Investment, the lead investor in this round, is a UK-based firm focused on climate infrastructure and technology. Their decision to back MTR suggests they see a path from pilot demonstrations to bankable commercial projects in the near term. The $27 million will go toward advancing MTR’s carbon capture membrane systems and scaling up manufacturing. The company also named a new CEO, though the specific identity and background of the appointee weren’t detailed in the available reporting. Leadership transitions at this stage typically signal a shift from R&D-heavy operations to commercialization, where the priorities become sales pipelines, project delivery, and manufacturing throughput rather than lab performance.

How membrane capture works

For readers less familiar with the technology: imagine a very thin sheet of specialized plastic. When you push a mixed gas (say, flue gas from a cement plant containing ~15-25% CO2) against one side, the CO2 molecules pass through faster than nitrogen and other gases. You collect a CO2-enriched stream on the other side. Stack enough of these membrane sheets into modules, and you can process large volumes of gas. The advantages over solvent-based capture are real. You don’t need to heat a liquid to 120°C to release the captured CO2, which is where a huge chunk of the energy penalty comes from in amine scrubbing systems. Membranes are also physically compact and can be manufactured in a factory and shipped to site, which matters for cost and deployment speed. The disadvantages are also real. Membranes typically struggle with very dilute CO2 streams (like ambient air at 420 ppm), which is why MTR’s technology is better suited for point-source capture from industrial facilities rather than direct air capture. Membrane selectivity, the ability to let CO2 through while keeping everything else out, has historically been a limiting factor, though MTR’s Polaris membranes have shown significant improvements over earlier generations.

Implications for the field

This raise matters for a few reasons. First, it diversifies the carbon capture technology portfolio. The field has been heavily weighted toward DAC companies like Climeworks and Carbon Engineering (now part of Occidental) and solvent-based point-source capture from companies like Aker Carbon Capture. More investment in membrane approaches gives buyers and project developers additional options, which is healthy for a sector that needs multiple solutions at different price points. Second, point-source capture on industrial emissions remains critically important. While CDR through DAC gets most of the attention, capturing CO2 at the smokestack of a cement plant or steel mill before it ever reaches the atmosphere is often cheaper per ton and more immediately deployable. MTR’s technology fits squarely in this category. Third, the manufacturing angle is worth watching. Membranes lend themselves to factory production in a way that large chemical absorption towers do not. If MTR can drive down unit costs through volume manufacturing, the economics of industrial carbon capture could shift meaningfully.

A note on what this is and isn’t

Point-source capture is not the same as carbon dioxide removal. Capturing CO2 from a cement plant’s flue gas prevents emissions from reaching the atmosphere, but it doesn’t pull legacy CO2 back out of the air. It’s emissions reduction, not removal. Both are necessary, but they serve different functions in climate strategy. It’s also worth being direct: carbon capture on industrial facilities should never be framed as a reason to delay the transition away from fossil fuels. The technology is for hard-to-abate sectors like cement, steel, and chemicals where process emissions exist regardless of energy source. If someone pitches you membrane capture as a way to keep burning coal guilt-free, walk away.

Caveats

The $27 million is meaningful but modest by infrastructure standards. Building even a single commercial-scale capture facility can cost hundreds of millions. This funding likely gets MTR through further demonstrations and early commercial deployments, but the company will almost certainly need additional capital to reach the scale where membranes compete head-to-head with incumbent solvent systems on large projects. We also don’t have detailed performance data from this reporting on where MTR’s capture costs currently sit on a per-ton basis, or how the Polaris membrane performs over multi-year continuous operation. Durability and fouling resistance in real industrial environments, where flue gas contains particulates, sulfur compounds, and moisture, remain open questions for any membrane system. The new CEO appointment will be worth tracking. The transition from a research-driven organization to a commercial one is where many promising climate technologies stumble. Execution in the next 18-24 months will tell us whether MTR can convert decades of membrane R&D into actual tons captured at competitive costs.

Source: Carbon Herald