Displaying items by tag: demonstration

Sweden: The Swedish Energy Agency has awarded US$12.5m to Boliden under its Industrial Leap initiative to support the development of a low-carbon cement alternative derived from iron-rich residual materials. The product allows for partial replacement of limestone in cement. Boliden is building an industrial demonstration plant to produce, test and verify the new material, which is based on byproducts from its own operations. Boliden estimates that the technology could cut value-chain emissions by around 600,000t/yr of CO₂ if fully implemented across its operations.

“Demonstrating innovative new technology to manufacture products with lower carbon emissions is fully in line with the purpose of the Industrial Leap. By reusing materials in new products instead of depositing them, the project also contributes to more circular use of materials,” said Klara Helstad, Deputy Head of the Department for Research, Innovation and Business Development at the Swedish Energy Agency.

US: Sublime Cement has announced a 10% workforce reduction and a pause in the development of its planned demonstration plant in Holyoke, Massachusetts, after the company failed to reverse a decision to cancel a US$86m federal grant, which would have funded 50% of the project. The company had been awarded the grant by the Department of Energy’s Office of Clean Energy Demonstrations (OCED), but the Trump administration cancelled all grants in May 2025. Sublime said that the loss of the grant disrupted the company’s financing plans and forced it to explore alternative scale-up options.

The company said in a statement “We are actively working through a robust set of alternative scale-up plans and have several exciting options to bring our first commercial plant online.”

Earlier in 2025, Microsoft committed to purchasing 623,000t of Sublime’s low-carbon cement to reduce the embodied emissions of its construction projects. The Holyoke plant was to supply the product, with a planned output of over 30,000t/yr. Sublime said that it remains in discussions with the Department of Energy.

Asia Cement unveiled a selective catalytic reduction (SCR) unit at its Jecheon plant this week. The Korea Cement Association (KCA), government representatives and staff from other cement companies were present at a demonstration. The US$25m project has been supported by the Ministry of Industry and Trade. It was originally announced in late 2023, has been running on a pilot basis for two months, and is expected to start full operation shortly. The cement sector in South Korea will be subject to tighter emissions controls in mid-2027 and further SCR installations are expected.

Earlier in 2025 the KCA estimated that installing SCR units on all 35 active clinker production lines in the country would cost around US$675m with an additional annual running costs. One point to note here is that one of the local sector’s commonly used alternative fuels (AF), waste synthetic resin, impedes the SCR process. Subsequently, it has to be run at higher temperature, which increases running costs.

The local cement industry has faced a mixed response to its uptake of AF in recent years. One strand of this has been a movement against so-called ‘trash cement.’ This culminated in the Ministry of Climate, Energy and Environment amending the Waste Management Act in November 2025 to make it mandatory for cement products to disclose on the packaging the means to check which ‘waste’ materials were used in their manufacture. This appears to include both supplementary cementitious materials (SCM) and AF. The government is now intending to make it possible for citizens to check the type of cement used in newly-constructed buildings. The KCA reported that the share of blended cements (i.e. those made with SCMs) was 15% in 2024. The rate had gradually decreased over the last decade from 19% in 2015. South Korean cement producers had a AF co-processing rate of 35% in 2021. The main fuels being used in this way were waste synthetic resin, waste tires and waste rubber, with the first being used the most.

Graph 1: Cement sales in South Korea, 2019 - 2025. Source: Korea Cement Association.

Meanwhile, cement producers in South Korea have turned to exports in 2025 in response to poor construction levels and growing input costs. The KCA revealed this week to local press that exports are expected to grow by 52% year-on-year to 4.5Mt in 2025 from 3Mt in 2024. Local shipments, however, are anticipated to fall by 16.5% to 36.5Mt from 42.9Mt. Producers have focused their export strategies towards South America and Africa in response to competition in the export market in South-East Asia from China and Vietnam, producers. For example, Halla Cement started targeting Cameroon and Guinea in 2025 following previous favourite destinations such as Peru and Chile. Exports are still lower than they were in the mid-2010s. In 2015, for example, the country exported 7.3Mt of cement and clinker. However, the share of the share of exports to total sales is at its highest level for at least a decade.

The necessity of running kilns at certain levels rather than simply idling them has also emerged in recent reporting. The reason given was to “...maintain a minimum allocation of carbon emission allowances.” The detail is lacking but this may sound familiar to readers familiar with the European Union (EU) Emissions Trading Scheme (ETS). Following the financial crash in 2008, for example, an over-allocation of carbon credits enabled some producers to make money despite falling demand for cement. This is not to say that the same thing is happening in South Korea. Merely, that any ETS can potentially face structural issues in a declining market.

The South Korean cement market is facing tough times, with the KCA further anticipating a decline of 1.3% in 2026. Environmental regulations such as the new emissions controls are further putting up costs. One peculiarity of the local market is the scrutiny that the easiest routes to decarbonisation, SCAs and AFs, are facing. Giving the public the tools to check this kind of information is admirable. Yet it creates extra hurdles for a sector trying to decarbonise at the same time as a construction market construction. Good luck!

The Global CemFuels Asia Conference will take place on 2 - 3 February 2026 in Bangkok

UK: Cool Planet Technologies has successfully tested its third-generation carbon capture membrane module at its Grimsby site. The test validated the scalability and performance of the company’s membrane process at flow rates of up to 37,000t/yr of captured CO₂ and recovery rates of 95% CO₂. Further tests were also conducted with a lime manufacturer in for a project which will use Cool Planet’s technology to decarbonise one of its kilns. The module will now be deployed at Holcim’s Höver cement plant in Germany for a 12-month demonstration project.

Andrew Corner, CEO of Cool Planet, said “This achievement validates years of innovation and positions Cool Planet at the forefront of lower cost, scalable industrial carbon capture solutions. The UK tests not only confirmed the performance and robustness of our technology, but also significantly strengthened industry confidence in our ability to help them deliver on their global decarbonisation goals.”

Netherlands: Sweden-based Paebbl's demonstration plant at its Rotterdam research and development centre has reached a cumulative 500 hours of production in the eight months since it entered operation in March 2025. The plant uses captured CO₂ as a feedstock to produce carbon-storing cementitious materials. Meanwhile, Paebbl has operated its pre-existing pilot plant for a cumulative 2000 hours. The producer is now designing its first commercial-scale plant.

Europe: Capsol Technologies has signed a rental agreement with a large European cement producer for a six-month CapsolGo carbon capture and liquefaction demonstration campaign at a cement plant. Delivery and testing of the unit are scheduled for the first quarter of 2026. The turnkey project will include installation, operation and testing to generate operational data supporting the producer’s future carbon capture and storage investment decisions. The campaign follows a previously completed CapsolEoP feasibility study.

CEO Wendy Lam said “We're proud to support the European cement producer on its path toward decarbonisation and to demonstrate how our carbon capture solution can deliver efficient, cost-effective emissions reductions in hard-to-abate sectors. During the carbon capture and liquefaction process, we will perform an extensive gas and liquid analysis to support the producer's CCS investment decisions in what will be our fourth demonstration campaign for the cement industry.”

Canada/Greece: Titan Group and Carbon Upcycling Technologies have entered into a memorandum of agreement to explore the commercial deployment of Carbon Upcycling’s technology for producing local, low-carbon building materials. Carbon Upcycling will conduct feasibility studies at two Titan cement plants, with the aim of producing supplementary cementitious materials using captured CO₂ and local materials.

Carbon Upcycling’s demonstration plant is currently operating in western Canada, and the company is now developing its flagship commercial-scale project in eastern Canada.

US: Queens Carbon has secured US$10m in seed funding to scale up production of its novel cement and supplementary cementitious materials (SCMs). The start-up will build a 2000t/yr demonstration plant at strategic partner Buzzi Unicem USA's Stockertown, Pennsylvania, cement plant. The plant will demonstrate Queens Carbon’s low-energy Q-Reactor technology, which employs novel hydrothermal chemistry, with the help of steam and pressure, to combine standard cement feedstocks into carbon-neutral hydraulic cement and SCMs. The company’s flagship product, Q-SCM, is capable of replacing up to 50% of cement in concrete mixes. Queens Carbon says that it will now also begin preparations for its first full-scale commercial plant.

Buzzi Unicem USA was among investors in the seed funding round, led by Climate technologies investor Clean Energy Ventures, with participation from fellow venture capital firm Plug and Play.

Queens Carbon CEO Daniel Kopp said "With support from Clean Energy Ventures, Buzzi Unicem USA and the US Department of Energy, we're building next-generation technology and assembling the creative talent needed to drive industry revenues to move cement innovation forward and significantly reduce CO₂ emissions from cement production, all without a green premium."

Luigi Buzzi, Chief Technology Officer at Italy-based Buzzi, said "We know that achieving our goal of net-zero carbon emissions by 2050 demands forward-thinking solutions to enhance both our operations and our environmental performance.”

UBE Mitsubishi Cement recently released an update on its commercial scale demonstration using ammonia as a fuel at its Ube plant. It is currently testing the use of ammonia in both the cement kiln and calciner at the site. It has set the aim of reaching a 30% coal substitution rate with ammonia in the cement kiln by the end of March 2025. It has described the project as a world first. Planned future work includes running ammonia combustion tests alongside post-consumer plastics.

The company announced the three-year project in mid-2023. Utilities company Chubu Electric Power has been working on it and UBE Corporation has been supplying the ammonia for the test. The scheme dates back to before Mitsubishi Materials and Ube Industries merged their cement businesses in 2022. Ube Industries previously took part in a government research project looking at the topic, running combustion tests and numerical analysis in small industrial furnaces.

Another ammonia research project in the cement sector was revealed in 2024 by Heidelberg Materials in the UK. The company was awarded just under €0.40m in funding by Innovate UK through its UK Research and Innovation (UKRI) fund, together with engineering consultants Stopford and Cranfield University. The 12-month feasibility study aimed to assess the use of ammonia as a hydrogen carrier and evaluate the most economical method of on-site ammonia cracking to generate hydrogen for use by clinker kilns. It also intended to investigate the various tiers of the UK's existing ammonia supply chain network for the suitable transportation, offloading and storage of ammonia.

The UK project explained that it was looking at ammonia as a hydrogen carrier due to its high volumetric energy density. This, potentially, makes ammonia easier and cheaper to store and transport than hydrogen. It pointed out that storing and transporting hydrogen is difficult and the chemical is expensive. It also noted that the volumetric energy density of ammonia is 45% higher than that of liquid hydrogen. The benefit of switching to a zero-carbon fuel was that it could cut CO₂ emissions by the cement and concrete sector in the UK by 16%.

The attraction of ammonia to the cement industry is similar to that of hydrogen. Both are versatile chemicals that can be produced and used in a variety of ways. The production processes and supply chains of both chemicals are linked. The Haber–Bosch process, for example, uses hydrogen to manufacture ammonia. It can also be cracked to release the hydrogen. When used as fuels neither release CO₂ emissions directly. This comes down to the method of production. Like hydrogen, there is a similar informal colour scheme indicating carbon intensity (Grey, Blue, Green and Turquoise). Despite the advantages listed above, the disadvantages of using ammonia include toxicity and NO_x emissions, as well as the fact that there is little experience of using ammonia as a fuel. The worldwide ammonia market was bigger by volume in 2023 with production of just under 200Mt compared to hydrogen production of just under 100Mt.

Back in Japan, the national government has been promoting the use of ammonia technology for the power generation sector. It added ammonia to the country’s national energy plan in the early 2020s following research on running power plants with a mixture of ammonia and coal. The ambition is to build up levels of ammonia co-firing at power plants, develop the necessary technology and grow supply chains. This, it is hoped, will broaden, diversify and decarbonise the domestic energy mix and pull together a new international market too. Unfortunately, this strategy has had criticism. One study by BloombergNEF in 2022 estimated, for example, that the electricity cost of Japan-based power stations switching to firing ammonia by 2050 would be more expensive than generation from renewables such as solar or wind.

This explains why the ammonia project by UBE Mitsubishi Cement is leading the way. The interest by a European cement company shows that others are thinking the same way too. Yet again, the potential decarbonisation solution for cement is likely to lead towards more complex industrial supply chains. The next steps to watch will be whether a cement plant in Japan actually starts to co-fire ammonia on a regular basis and if any more ammonia projects pop up elsewhere around the world.

Japan: Mitsubishi UBE Cement Corporation has started a commercial-scale demonstration test using ammonia as a heat energy source in a cement kiln and calciner at Ube cement plant.

The project, supported by Yamaguchi Prefecture’s 2023 Carbon Neutral Complex Development Promotion Subsidy, follows an ammonia co-combustion test in 2023. In collaboration with UBE Corporation, a test facility for ammonia co-firing was installed.

The company has set a target of replacing 30% of its coal consumption with ammonia in the cement kiln, with similar levels targeted for the calciner by the end of the 2025 financial year. Mitsubishi UBE Cement is also planning further ammonia combustion tests with post-consumer plastics and other materials as energy sources.