From the Canadian Energy Centre

By Grady Semmens

‘We are excited to bring this made-in-Canada innovation to the world’

To the naked eye, it looks about as exciting as baking soda or table salt.

But to the scientists in the University of Calgary chemistry lab who have spent more than a decade working on it, this white powder is nothing short of amazing.

That’s because the material they invented is garnering global attention as a new solution to help address climate change.

Known as Calgary Framework-20 (CALF-20 for short), it has “an exceptional capacity to absorb carbon dioxide” and was recognized in connection with the 2025 Nobel Prize in Chemistry.

A jar of CALF-20, a metal-organic framework (MOF) used in carbon capture. Photo courtesy UCalgary

“It’s basically a molecular sponge that can adsorb CO2 very efficiently,” said Dr. George Shimizu, a UCalgary chemistry professor who leads the research group that first developed CALF-20 in 2013.

The team has been refining its effectiveness ever since.

“CALF-20 is a very exciting compound to work on because it has been a great example of translating basic science into something that works to solve a problem in the real world,” Shimizu said.

Advancing CCS

Carbon capture and storage (CCS) is not a new science in Alberta. Since 2015, operating projects in the province have removed 15 million tonnes of CO2 that would have otherwise been emitted to the atmosphere.

Alberta has nearly 60 proposed facilities for new CCS networks including the Pathways oil sands project, according to the Regina-based International CCS Knowledge Centre.

This year’s Nobel Prize in Chemistry went to three of Shimizu’s colleagues in Japan, Australia and the United States, for developing the earliest versions of materials like CALF-20 between 1989 and 2003.

Custom-built molecules

CALF-20 is in a class called metal-organic frameworks (MOFs) — custom-built molecules that are particularly good at capturing and storing specific substances.

MOFs are leading to new technologies for harvesting water from air in the desert, storing toxic gases, and capturing CO2 from industrial exhaust or directly from the atmosphere.

CALF-20 is one of the few MOF compounds that has advanced to commercial use.

“There has been so much discussion about all the possible uses of MOFs, but there has been a lot of hype versus reality, and CALF-20 is the first to be proven stable and effective enough to be used at an industrial scale,” Shimizu said.

It has been licensed to companies capturing carbon across a range of industries, with the raw material now being produced by the tonne by chemical giant BASF.

CO2 pipeline at the Quest CCS project near Edmonton, Alta. Photo courtesy Shell Canada

Carbon capture filter gigafactory

Svante Inc. has demonstrated its CALF-20-based carbon capture system at a cement plant in British Columbia.

The company recently opened a “gigafactory” in Burnaby equipped to manufacture enough carbon capture and removal filters for up to 10 million tonnes of CO2 annually, equivalent to the emissions of more than 2.3 million cars.

The filters are designed to trap CO2 directly from industrial emissions and the atmosphere, the company says.

Svante chief operating officer Richard Laliberté called the Nobel committee’s recognition “a profound validation” for the entire field of carbon capture and removal.

CALF-20 expansion

Meanwhile, one of Shimizu’s former PhD students helped launch a spinoff company, Existent Sorbents, to further expand the applications of CALF-20.

Existent is working with oil sands producers, a major steel factory and a U.S.-based firm capturing emissions from other point sources, said CEO Adrien Côté.

“The first users of CALF-20 are leaders who took the risk of introducing new technology to industries that are shrewd about their top and bottom lines,” Côté said.

“It has been a long journey, but we are at the point where CALF-20 has proven to be resilient and able to survive in harsh real-world conditions, and we are excited to bring this made-in-Canada innovation to the world.”