Displaying items by tag: Brimstone

US: Oakland, California-based cleantech startup Brimstone has received a US Department of Energy grant worth up to US$189m to establish a plant with a capacity of 80,000t/yr of ‘green’ cement and 20,000t/yr of smelter-grade alumina, according to the San Francisco Business Times. The grant will be paid out in instalments and requires matching funds from new investments, loans and other sources.

The US$378m facility, which is still in the site selection phase, will be located near an existing quarry in order to mine calcium silicate rocks.

CEO Cody Finke said “We’re exclusively looking at brownfield sites. The goal is to build our own plant while utilising existing quarries to ensure a sustainable and economically viable operation.”

Brimstone plans to begin pilot operations in 2025 and aims to have the plant fully operational by the end of the decade. The company is currently testing its decarbonised cement with potential customers from its Oakland research and development facility.

The US Department of Energy (DOE) announced a US$1.6bn investment in the cement sector this week. The funding was part of a total of US$6bn for 33 projects in over 20 states to decarbonise energy-intensive industries also including chemicals and refining, iron and steel, aluminium and metals, food and beverages, glass, process heat applications and pulp and paper. The DOE was keen to link the money to “the President’s Bipartisan Infrastructure Law and Inflation Reduction Act.” Politics is never far away it seems! The projects are part of the Industrial Demonstrations Program, managed by DOE’s Office of Clean Energy Demonstrations (OCED).

Table 1: Summary of US Department of Energy funding announced on March 2024 to decarbonise cement and concrete production

Table 1 above shows the main approaches each of the projects aim to use. The two most expensive ones involve carbon capture and sequestration (CCS) at Heidelberg Materials US’ Mitchell cement plant in Indiana and National Cement’s Lebec plant in California respectively. In a complimentary press release Chris Ward, the CEO of Heidelberg Materials North America, said “This substantial federal funding investment will help create the first full-scale deployment of carbon capture and storage on a cement plant in the US.” The proposed CCS unit at the plant will capture around 2Mt/yr of CO₂ from 2030. If Ward’s forecast is accurate (and no one beats them to it), then Heidelberg Materials will likely have set up the first full-scale CCS units at cement plants in both North America and Europe. This will be a significant achievement. The National Cement project, by contrast, is a mixed bag of approaches to decarbonising cement production that follows the multi-lever approach advocated for in many of the industry net-zero roadmaps. It intends to use agricultural by-products such as pistachio shells, as alternatives fuels to lower the fuel-based emissions, calcined clay to lower the clinker factor and CCS to capture the remaining 950,000t/yr of CO₂ emissions.

The other projects either involve using calcined clay or substituting limestone with calcium silicate. The Summit Materials proposal is noteworthy because it aims to build four clay calcination units in locations in Maryland, Georgia and Texas. None of these appear to be near Summit’s (or Cementos Argos’) cement plants. This suggests that the company may be intending to use calcined clay in ready-mixed concrete production. The Roanoke Cement Company calcined clay project will be baseEuropead at its cement plant in Troutville, Virginia.

The remaining two grant recipients, Brimstone and Sublime Systems, will both test the companies’ different methods of manufacturing cement by using calcium silicate instead of limestone. Brimstone’s method produces ordinary Portland cement (OPC) and supplementary cementitious materials (SCM). The company said in July 2023 that its OPC met the ASTM C150 standards. However, the company has released less information about its actual process. Sublime Systems’ uses an electrolysis approach to create its ASTM C1157-compliant cement. It calls this ‘ambient temperature electrochemical calcination.’

Investment on the same scale of the DOE has also been happening in Europe. In July 2023, for example, the European Commission announced an investment of Euro3.6bn in clean tech projects to be funded from the proceeds of the European Union emissions trading scheme (ETS). This was the third call for large-scale projects following previous announcements of recipients in 2021 and 2022. Euro1.6bn of the third call funding went towards cement and refining projects including five cement and lime projects in Belgium, Croatia, Germany and Greece. The money granted for each of these schemes was in the region of Euro115 - 235m.

Both the US and Europe are throwing serious finance at the cement industry to try and kickstart the various pathways towards net zero. They are also doing it in different ways, with the US aiming to boost its economy by onshoring sustainable industry, and Europe hoping to fund its approach via carbon taxation. Government-driven decarbonisation investment for cement in other large countries and regions around the world appears to be lagging behind the US and Europe but these may spring up as net zero targets are set, roadmaps drawn up and government policy formulated. These places could also benefit from watching what works and does not work elsewhere first. Back in the US and Europe the next tricky part of this process will be bridging the gap between government subsidy and commercial viability.

US: Brimstone is negotiating a US$189m Federal award with the Department of Energy to finance the construction of a new decarbonised cement plant. This plant will produce up to 140,000t/yr of Ordinary Portland Cement and supplementary cementitious materials, reducing CO₂ emissions by 120,000t/yr.

Brimstone's process uses carbon-free calcium silicate rocks, reducing its CO₂ footprint. In July 2023, Brimstone's cement met ASTM C150 standards, confirming the effectiveness of its decarbonised process. The company is preparing to construct a pilot plant near Reno, Nevada.

It has been a busy week for carbon capture in the cement sector with Global Cement covering five stories. However, increasingly, the topic has become a regular feature in the press as the industry bends to the demands of the carbon agenda. This week’s selection is notable because three of the stories cover North America.

Holcim US announced that it is working with Ohio State University and GTI Energy to design, build and test engineering-scale membrane carbon capture technology at the Holly Hill cement plant in South Carolina. The information builds on an earlier release from the US Department of Energy’s (DOE) Office of Fossil Energy and Carbon Management (FECM) in late December 2023 about the project. It has a total budget of US$9m, with US$7m supplied by the DOE. It plans to build a 3t/day CO₂ capture unit that uses a method intended to retain 95 - 99% of CO₂ from cement kiln gas with a purity exceeding 95%. The new information at this stage is that GTI Energy is involved. Specifically, it will support the development of the pilot skid for site deployment.

The other two stories from North America are worth noting because they both concern commercial equipment or technology suppliers joining up to work together. First, 10 companies - Biomason, Blue Planet Systems, Brimstone, CarbonBuilt, Chement, Fortera, Minus Materials, Queens Carbon, Sublime Systems, and Terra CO₂ - announced they were launching the Decarbonized Cement and Concrete Alliance (DC2). The group’s principal aim is to lobby the US government toward using new low-carbon cement and concrete products in public infrastructure. It also intends to look at advocacy and public sector engagement including expanded tax credits, development of standards for novel cements, consistent ecolabeling and accounting, and customer demand support. DC2 was formally launched in January 2024 but it follows previous work by the companies in the area. The other related story was a memorandum of understanding that Aker Carbon Capture and MAN Energy Solutions have also signed this week to jointly pursue opportunities related to carbon capture, utilisation and storage (CCUS) and CO₂ compression in the North American market. These two companies have worked on the full-scale CCUS unit at Norcem’s Brevik cement plant, which is due to be commissioned later in 2024. They are likely intending to capitalise on the publicity that is likely to be generated once it officially starts up.

Back in North America the DC2 Alliance noted in its press release the DOE’s release of its Pathways to Commercial Liftoff: Low-Carbon Cement report in September 2023. Although it is similar to many other varied sector roadmaps, including the Portland Cement Association’s Road to Net Zero that was released in 2021, this document is well worth reading due to its details and local market context. The headline figure, for example, is that following a set of pathways to fully decarbonise the US cement industry would cost US$60 - 120bn by 2050. Doing so would involve reducing the clinker factor, improving energy efficiency, increased use of alternative fuels, using CCUS, using alternative feedstocks and adopting alternatives to traditional cement production methods.

Graph 1: US active cement kilns by capacity and age. Source: PCA survey data used in Department of Energy Pathways to Commercial Liftoff: Low-Carbon Cement report.

One other interesting tidbit to consider from the report is an analysis of the age of the US cement sector’s kilns versus their production capacity as shown in Graph 1 above. The largest 10 kilns in the country account for 22% of the country’s total capacity and these were all built after 2000. Then, the next 44% of the national capacity comes from 38 kilns out of a total of 120 kilns at 98 cement plants. The report itself does not make this assertion but the implication is that retrofitting CCUS units at one third of the country’s clinker lines would capture the CO2 being emitted from two-thirds of the sector’s production capacity. This is not to say that this could actually work technically, logistically or economically. Yet seeing the scale of the challenge presented in this way is fascinating and one starts to have thoughts about how a retrofit roll-out of CCUS units might actually be approached.

Whether the cement sector adopts CCUS at scale remains to be seen but demonstration projects are definitely coming in both Europe and North America. The DOE report from September 2023 suggests that decarbonisation will cost a lot of money. No surprises there and, as ever, there is rather less detail on who will actually pay for this. One thing that might help here, that the DOE report mentions frequently, is the 45Q carbon capture tax credit scheme, which was introduced by the Trump administration in 2020. Regardless of the potential bill for consumers of cement though, the suppliers are clearly taking note of the investment potential as evidenced by all the non-cement plant CCUS news stories this week.

The 1st Global CemCCUS Conference will take place 13 - 15 May 2024 in Norway and it will include a plant tour of the Norcem Brevik cement plant and CCS project

North America: A new coalition for the scaling and deployment of low-carbon building materials, the creation of new clean cement and concrete jobs and the promotion of environmental justice launched earlier in January 2024. Called the Decarbonized Cement and Concrete Alliance (DC2), it comprises alternative cement developers Biomason, Brimstone, Chement, Fortera and Terra CO₂, sequestration company Blue Planet Systems, circular concrete producer CarbonBuilt, biogenic limestone producer Minus Materials, hydrothermal processing technology developer Queens Carbon and electrified cement production technology developer Sublime Systems. DC2’s areas of engagement in policy will include tax credits, standards, ecolabeling and subsidisation, in line with the US Department of Energy’s Pathways to Commercial Liftoff: Low-Carbon Cement strategy.

CarbonBuilt’s government and community affairs manager Sal Brzozowski said “DC2’s platform of robust policy, standards and incentives to scale innovative solutions will not only accelerate deep decarbonisation, but also transform the concrete industry from one of the world’s largest CO₂ emitters to one of the world’s largest carbon sinks.”

US: Brimstone has announced a new method of ordinary Portland cement (OPC) with a negative carbon footprint. Brimstone's method uses carbon-free calcium silicate in the place of limestone. Its calcination also produces magnesium compounds, which naturally sequester further CO₂ from the atmosphere. The technology will now proceed to the testing phase at an upcoming pilot plant in Reno, Nevada, before proceeding to commercial-scale production. Brimstone will then begin to market its OPC, along with supplementary cementitious materials produced by its process.

Brimstone's chief technology officer Hugo Leandri said “By delivering the exact same cement, we clear away the main obstacles to adoption, offering an opportunity to dramatically speed up the path to net-zero construction. The same buildings, bridges and roads being built today can be built tomorrow, without carbon."