Displaying items by tag: Study

A week ago, there were two fully-financed cement plant carbon capture, utilisation and storage (CCUS) projects underway in the US.¹ Now, there aren’t.

Projects to decarbonise National Cement Company’s Lebec, California, plant and Heidelberg Materials North America’s Mitchell, Indiana, plant were each set to receive up to US$500m in US Department of Energy (DoE) funding on a one-for-one basis with private investments. The projects were to include eventual 950,000t/yr (Lebec) and 2Mt/yr (Mitchell) carbon capture installations. Additionally, the Lebec plant was to transition to limestone calcined clay cement (LC3) production and the use of alternative fuels (AF), including pistachio shells. Both were beneficiaries of the DoE’s US$6bn Industrial Demonstrations Program (IDP), touted by former US Secretary of Energy Jennifer Granholm as ‘Spurring on the next generation of decarbonisation technologies in key industries [to] keep America the most competitive nation on Earth.’ Disbursement of funding under the programme was frozen by executive order of President Trump in January 2025.^{2, 3}

On 30 May 2025, Trump’s Secretary of Energy announced that the government in which Granholm served had approved spending on industrial decarbonisation without a ‘thorough financial review.’ He cancelled remaining project funding in signature Trumpian style, in list form.⁴ Among 24 de-funded projects, Lebec and Mitchell accounted for US$1bn (27%) of a total US$3.73bn in allocated funds that have now been withdrawn.

It's hard not to feel sorry for the management of the Lebec and Mitchell plant and the teams that had been working to deliver these projects. Heidelberg Materials has yet to comment, though CEO Dominik von Achten was in North America in late May 2025. National Cement Company parent Vicat, meanwhile, conceded the setback with a strong statement of its commitment to CO₂ reduction, to 497kg/t of cementitious product globally.⁵ There was a diplomatic edge to the statement too, however. Echoing the Secretary of Energy, Vicat said that its target remains ‘solely based on existing proven technologies, including energy efficiency, AF substitution and clinker rate reduction’ – as opposed to ‘any technological breakthroughs’ like carbon capture. There are currently no public details of possible back-up financing arrangements for these projects; for now, the best guess at their status is ‘uncertain.’

Alongside these group’s local subsidiaries, another organisation that has to do business daily with the DoE is the American Cement Association (ACA). President and CEO Mike Ireland has continually acknowledged the complex needs of the government, while stating the association’s case for keeping support in place. With regard to these funding cuts, Ireland’s emphasis fell on the latter side: “Today’s announcement is candidly a missed opportunity for both America’s cement manufacturers and this administration, as CCS projects have long been supported by bipartisan members in Congress and bipartisan administrations.”⁶ He reasserted the ACA’s understanding that carbon capture aligns with the administration’s strategy to bolster domestic manufacturing and innovation.

The early 2020s heyday of US carbon capture was founded on gradual, consensus-based politics – unlike its demise. Table 1 (below) gives a non-exhaustive account of recent and on-going front-end engineering design (FEED) studies and the funding they received:

Additionally, MTR Carbon Capture, which is executing a carbon capture pilot at St Marys Cement’s Charlevoix plant in Michigan, previously received US$1.5m in Fossil Energy Research and Development funding towards a total US$3.7m for an unspecified cement plant carbon capture study.¹⁰

Market researcher Greenlight Insights valued industrial decarbonisation initiatives under the Office of Clean Energy Demonstrations (ODEC – the now defunct DoE office responsible, among other things, for the IDP) at US$65.9bn in cumulative returns in April 2025.¹¹ The government has yet to publish any account of how it might replace this growth, or the 291,000 anticipated new jobs that would have come with it. Given all this (along with the extensive financial and technical submissions that accompanied each project), the issues raised by the DoE are presumably budgetary, or else founded in a perception of CCUS as essentially uneconomical.

Carbon capture is very, very expensive. A fatuous reply is that so is climate change, just with a few more ‘verys.’ Hurricane Ian in September 2022 cost US$120bn, more than enough to fund carbon capture installations at all 91 US cement plants, along the lines of the former Lebac and Mitchell agreements.¹² Unlike climate change, however, carbon capture remains unproven. Advocates need to continually justify taxpayer involvement in such a high-risk venture.

At its Redding cement plant in California, Lehigh Hanson successfully delivered a funding-free FEED study, with its partner Fortera raising US$85m in a Series C funding. This presents an alternative vision of innovation as fully-privatised, in which the government might still have the role of shaping demand. This is borne out in the IMPACT Act, a bill which ‘sailed through’ the lower legislature in March 2025.¹³ If enacted, it will empower state and municipal transport departments to pledge to buy future outputs of nascent reduced-CO₂ cements and concretes.

A separate aspect of the funding cancellation that appears decidedly cruel is the targeted removal of grants to start-ups. Two alternative building materials developers – Brimstone and Sublime Systems – were listed for a combined US$276m of now vapourised liquidity. Both are commercially viable without the funding, but the effect of this reversal – including on the next generation of US innovators who hoped to follow in their footsteps – can only be chilling. As non-governmental organisation Industrious Labs said of the anticipated closure of the ODEC in April 2025: “We may see companies based in other geographies start to pull ahead.”

Heidelberg Materials’s Brevik carbon capture plant came online in June 2025, 54 months after the producer secured approval for the project. The term of a presidency is 48 months. This probably means that producers in the US will no longer see CCUS as a viable investment, even under sympathetic administrations.

Even as government funding for CCS flickers from ‘dormant’ to ‘extinct,’ the sun is rising on other US projects. Monarch Cement Company commissioned a 20MW solar power plant at its Humboldt cement plant in Kansas on 27 May 2025. The global momentum is behind decarbonisation, even if economics determines that it will only take the form of smaller-scale mitigation measures at US cement plants into the medium-term future. We can hope that these, at least, might include the AF and LC3 aspects of National Cement Company’s plans at Lebec.

References

1. Clean Air Task Force, ‘Global Carbon Capture Activity and Project Map,’ accessed 3 June 2025, www.catf.us/ccsmapglobal/

2. Democrats Appropriations, ‘Issue 5: Freezing the Industrial Demonstrations Program Undermines U.S. Manufacturing Competitiveness and Strands Private Investment,’ January 2025, www.democrats-appropriations.house.gov/sites/evo-subsites/democrats-appropriations.house.gov/files/evo-media-document/5%20DOE%20Frozen%20Funding%20-%20Industrial%20Demos.pdf

3. Colorado Attorney General, ‘Attorney General Phil Weiser secures court order blocking Trump administration’s illegal federal funding freeze,’ 6 March 2025, www.coag.gov/press-releases/weiser-court-order-trump-federal-funding-freeze-3-6-25/

4. US Department of Energy, ‘Secretary Wright Announces Termination of 24 Projects, Generating Over $3 Billion in Taxpayer Savings,’ 30 May 2025, www.energy.gov/articles/secretary-wright-announces-termination-24-projects-generating-over-3-billion-taxpayer

5. Vicat, ‘Cancellation of funding agreement for the Lebec Net Zero project by the US Department of Energy,’ 3 June 2025, www.vicat.com/news/cancellation-funding-agreement-lebec-net-zero-project-us-department-energy

6. American Cement Association, ‘Statement from the American Cement Association on Department of Energy’s Cancellation of Clean Energy Grants,’ 30 May 2025, www.cement.org/2025/05/30/statement-from-the-american-cement-association-on-department-of-energys-cancellation-of-clean-energy-grants/

7. Gov Tribe, ‘Cooperative Agreement DEFE0031942,’ 30 September 2022, www.govtribe.com/award/federal-grant-award/cooperative-agreement-defe0031942

8. Higher Gov, ‘DECD0000010 Cooperative Agreement,’ 13 May 2024, www.highergov.com/grant/DECD0000010/

9. Gov Tribe, ‘Cooperative Agreement DEFE0032222,’ 7 February 2025, www.govtribe.com/award/federal-grant-award/cooperative-agreement-defe0032222

10. Higher Gov, ‘DEFE0031949 Cooperative Agreement,’ 1 May 2023, www.highergov.com/grant/DEFE0031949/

11. Center for Climate and Energy Solutions, ‘Jobs, Economic Impact of OCED Closure,’ 11 April 2025, www.c2es.org/press-release/oced-closure-could-cost-65-billion-290000-jobs/

12. National Centers for Environmental Information, ‘Events,’ accessed 4 June 2025, www.ncei.noaa.gov/access/billions/events/US/2022?disasters%5B%5D=tropical-cyclone

13. US Congress, ‘H.R.1534 - IMPACT Act,’ 26 March 2025, www.congress.gov/bill/119th-congress/house-bill/1534

Canada: Ash Grove Cement, part of CRH, says it will release the findings of technical studies supporting its plan to burn alternative fuels at its Mississauga cement plant. Ash Grove plans to burn materials such as construction and demolition waste, wood, plastics and rubber.

The company says the initiative will reduce fossil fuel emissions by limiting its current reliance on coal, while also diverting materials from landfill.

Germany: KHD will carry out a front-end engineering design (FEED) study for the new oxyfuel kiln at Heidelberg Materials' Geseke cement plant, part of the GeZero carbon capture and storage (CCS) project. The project will capture and store around 0.7Mt/yr of CO₂.

Matthias Mersmann, chief technology officer at KHD, said "At KHD, we have long recognised oxyfuel technology’s potential for cement decarbonisation and are well-positioned to contribute to this important flagship project.”

Germany: Heidelberg Materials has started the Front-End Engineering Design (FEED) Study phase on the GeZero project at its Milke plant in Geseke. The technical planning phase is being conducted by Fluor Corporation. It will focus on the design and integration of the various systems into the overall technical concept, which also includes a CO₂ transport solution. The technical planning is expected to be completed in mid-2025 with construction scheduled to start in 2026.

Christian Knell, CEO of Heidelberg Materials Germany, said “With GeZero, Heidelberg Materials will rely on CO₂ capture using state-of-the-art oxyfuel technology in combination with a CO₂ cleaning and liquefaction plant. To pave the way for domestic CCS plants, a CO₂ transport solution by rail is part of the planning until the necessary pipeline infrastructure is available. In addition, a local CO2 storage hub is to be created as interim storage. The electrical energy requirement for the operation of the plant is to be covered exclusively by renewable energies. A new photovoltaic system in the vicinity of the factory premises will help to meet the needs.”

The GeZero project is preparing to build a carbon capture and sequestration (CCS) value chain for the Geseke cement plant, North Rhine-Westphalia, in inland Germany. It aims to capture 0.7Mt/yr of CO₂ starting from 2029. The project is supported by the European Union Innovation Fund.

UK: A new study by the Mineral Products Association (MPA), supported by Innovate UK, has found that incorporating reclaimed clays and finely ground brick powder into cement production can reportedly lower the embodied CO₂ by up to 3%. The materials are used as calcined clay in the cement production process. The project aims to offer a viable alternative to fly ash and ground granulated blast-furnace slag, as resources diminish due to the steel industry's decarbonisation efforts.

MPA director Diana Casey said "Using discarded bricks and reclaimed clays will not only lower carbon and reduce the amount of materials sent to landfill but has the potential to create a whole new market if these clays become widely used in the construction industry, helping to retain economic value in the UK, secure jobs and attract investment."

Germany: Canada-based company Rock Tech has promoted a peer-reviewed study by the German Lithium Institute that confirms the potential of byproducts from lithium production to be used in cement manufacture. The study found that leached spodumene concentrate (LSC), primarily composed of aluminosilicates, can replace fly ash as an additive in the cement industry. The study also revealed that adding 20% LSC to Portland cement increases its compressive strength by 10%. The process for producing and utilising LSC has been submitted for a patent.

"The phase-out of coal and the transformation of the steel industry will sooner or later lead to changed or disappearing material streams that have been significant for the cement industry in terms of CO₂ savings and product portfolio. The LSC from lithium production has the potential to compensate for these depleting material streams in the future."

Thailand: Siam Cement Group has awarded JGC Corporation the pre-feasibility study for a carbon capture and utilisation (CCU) facility at a cement plant in Thailand. The study will determine the technology license, assess the required production capacity for CO₂ capture facilities and evaluate the economic feasibility of constructing a CCU facility, which will capture and convert CO₂ from SCG's cement plant emissions into new chemical products.

Australia: The Australian federal government has granted Adbri US$32.5m for a new front-end engineering and design study at its Birkenhead cement plant. The study will assess the possible installation of a new vertical roller mill and post-production blending system at the plant. InDaily News has reported that the proposed upgrade will increase the plant’s production capacity and help to expand its range of reduced-CO₂ cements. The funding falls under the government’s US$260m Critical Inputs to Clean Energy programme, which aims to help decarbonise the Australian economy by 2050.

CEO Mark Irwin said “With the Commonwealth’s support we have the potential to further accelerate the decarbonisation of our operations and products.”

Pakistan: On 18 April 2024, the Sustainable Development Policy Institute (SDPI) and the Policy Research Institute for Equitable Development (PRIED) launched two studies focusing on the decarbonisation of Pakistan's cement sector. The initiative focuses on collaboration and technology sharing to reduce the industry's carbon footprint.

Professor Muhammad Fahim Khokhar from the National University of Science and Technology (NUST) said "The global CO₂ emissions released from the cement sector are 37.4Gt, which is rising at 1.1% per year."

The study by PRIED and NUST showed a 30% increase in cement sector CO₂ emissions in 2020 relative to 1990-2000, reaching 49.6Mt/yr. The study proposed strategies for cement sector decarbonisation, such as alternative fuels, clinker substitution, renewable energy, process electrification, energy efficiency and carbon capture technologies.

According to researcher Saleha Qureshi, the major challenge for decarbonisation is that cement industries in Pakistan rely on over 65% coal in the calcination process. Other challenges identified were lack of regulatory and policy support, absence of performance-based standards, high transition cost and limited incentive available for the transition.

China: A new study from Hong Kong Polytechnic University showcases sustainable cement production methods, focusing on low-clinker cements and alternative solutions for incinerator fly ash (IFA). The research demonstrates that using carbonated-washed IFA mixed with slag, coal fly ash, or metakaolin can replace 60% of Portland cement, forming ternary blended cement. This approach reportedly reduces the carbon footprint of cement production.

The study found that slag was the most effective, improving pore structure and increasing ettringite and hemicarboaluminate formation with a blend of 40% slag and 20% IFA. It achieved 90% of the compressive strength of pure Portland cement after 90 days.

The researchers said "This study demonstrated the promising potential of the blended cements to simultaneously divert IFA from landfills and reduce the clinker content of cement."