Displaying items by tag: CO2

India: Shree Cement says that it has reached 1GW captive power capacity across its plants, after commissioning a new 19.5MW solar power plant at a facility in Andhra Pradesh. Renewables account for 499MW (50%) of the total. Shree Cement says that its investments in renewables to date total US$479m. NBM & CW News has reported that the company has current planned new investments worth US$120m in renewables. This will cover 132MW-worth of solar, 36MW of wind and 34MW of waste heat recovery power capacity.

Switzerland: Holcim has acquired recycling, ready-mix concrete and aggregates company Cand-Landi Group. The company employs 250 people across its operations in Western Switzerland. Holcim plans for Cand-Landi Group to supply alternative raw materials and fuels for use at its Eclépens plant. It says that the acquisition will increase its recycling capacity of construction and demolition materials by 100,000t/yr.

Holcim CEO Miljan Gutovic said "The acquisition of the Cand-Landi Group will advance decarbonisation and circularity in Switzerland, a lighthouse market for innovation at Holcim. I look forward to welcoming all 250 employees of the Cand-Landi Group and investing in our next chapter of growth together."

Canada: Hyperion Global Energy has fired up its pilot Tandem Carbon Recycling System at Lafarge Canada’s Bath cement plant in Ontario. The system mineralises captured CO₂ to produce mineral components for alternative building materials. It has a capture capacity of 1000t/yr. The partners will test the Tandem Carbon Recycling System in producing Lafarge Canada’s 30 – 90% reduced CO₂ ECOPact concrete.

Lafarge Canada’s Eastern Canada regional president and CEO of David Redfern said "Our collaboration with Hyperion marks an exciting milestone in our decarbonisation journey and the advancement of our circular construction technologies. We look forward to advancing our net zero strategy by leveraging carbon utilisation technology like Hyperion's, enabling us to further reduce CO₂ emissions from our operations while at the same time producing innovative and sustainable building solutions."

Hyperion CEO Heather Ward said "Working together with an innovative partner like Lafarge on this exciting pilot project allows us to apply our proprietary carbon recycling technology to large-scale industries, and make an immediate, measurable reduction on carbon emissions. At the same time, we are advancing our vision to offer a scalable and affordable decarbonisation solution for industry, and a market-driven profit incentive on the cost of carbon removal."

Netherlands: Paebbl has successfully mineralised its first tonne of CO₂ into raw materials for alternative building materials at its pilot facility in Rotterdam. The tonne of CO₂ corresponds to 3t of material produced. In a post to LinkedIn, the company said that it is now seeking ‘more brilliant, planet-aligned, resilient people’ to join its team of 30 people.

Paebbl said “We're moving fast, but our journey is barely a humbling 0.0000001% complete.”

Germany: France-based Fives has won a contract to build a 50t/day clay calcination unit at Rohrdorfer’s Rohrdorf cement plant in Bavaria. The unit will integrate into the plant’s clinker line in order to allow it to test the production of limestone calcined clay cement with up to 40% reduced CO₂ emissions. Fives’ clay calcination unit uses a flash calcination process, based on a three-stage preheater, flash calciner and decolourisation system.

Rohrdorfer’s Net Zero Emissions Labs team is responsible for the project to decarbonise the Rohrdorf cement plant by 2038. Its managing director Helmut Leibinger said “After a detailed technical review, we decided that the flash calciner with an integrated clay calcination unit from Fives FCB was the best solution in terms of reliability, efficiency and colour control. We are confident that the unit will be essential in moving forward on our pathway to net zero.”

China: The National Development and Reform Commission, along with other government departments, has launched the Special Action Plan for Energy Conservation and CO₂ Reduction in the Cement Industry. The plan aims to cap clinker capacity at 1.8Bnt/yr by 2026, with 30% of it above the national energy efficiency benchmark level. This will reduce energy consumption per tonne by 3.7% from 2020 levels. The plan will eliminate 13Mt of CO₂ emissions and 5Mt of coal consumption in 2024 – 2025.

The Indonesian government emphasised its intention this week to use ‘green’ cement in the construction of its new capital city Nusantara in Borneo. However, this begs the question: what exactly is ‘green’ cement?

In this case, Mohammad Zainal Fatah, the secretary general of the Ministry of Public Works and Public Housing, told state media that his department was “seeking to encourage the supply of domestic-industry-based material resources and construction equipment, which can support sustainable infrastructure development principles." The ministry is working with state-owned cement producers such as Semen Indonesia (SIG) to ensure the provision of sustainable cement and related products. SIG was selected as a supplier for the project in late 2022 and, as of February 2024, has reportedly provided 400,000t of cement from its plants at Balikpapan and Samarinda.

This is admirable stuff. However, the timing of the announcement is curious given that both the head and deputy head of the Nusantara Capital City Authority resigned this week forcing the government to reassure investors that the project was still on. Cue some swift discussion about ‘green’ cement! Previously it was hoped that the first phase of the US$34bn project could be inaugurated on the country’s independence day in August 2024 with civil servants scheduled to start relocating to the site in the autumn.

SIG sells a number of ‘green’ blended cement products and some of these have received Green Label Cement certification from the Green Product Council Indonesia. The group says that these products have contributed up to a 38% drop in CO₂ emissions compared to Ordinary Portland Cement (OPC). This compares to the group’s clinker factor reduction rate of 69% and its Scope 1 emissions intensity reduction of 17% to 585kg/CO₂/t of cement in 2023 compared to 2010 levels.

Along similar lines, the Alliance for Low-Carbon Cement & Concrete (ALCCC) in Belgium also announced this week that it had released a new policy roadmap aimed at achieving net zero emissions by 2040. Amongst its recommendations were a focus on the standards for cement and concrete to promote low-carbon products and encouragement to create lead markets to develop demand for them.

Crucially, the ALCCC uses low-carbon cement in place of ‘green’ cement and this makes its definition clearer. ‘Green’ cement is a marketing term intended to associate cement with environmentalism. Yet there is no accepted definition describing how these products are more sustainable than, say, OPC. For example, a so-called ‘green’ cement could use 100% clinker manufactured with no CO₂ emissions-abatement, but it might be sustainable in other ways such as saving water. For the purposes of this article we’ll assume that ‘green’ cement means a low-carbon one. To further add to the confusion, ‘green’ concrete can be made using OPC in various ways but that’s beyond the scope of this piece. Clearly the world could do with some universal definitions.

US-based research and consulting company Global Efficiency Intelligence came to the same conclusion when it published its ‘What are Green Cement and Concrete?’ report in December 2023. It decided that - despite there being plenty of standards, protocols, and initiatives - there is no general agreement on the definition of ‘green’ cement or concrete. Its emissions intensity for cement summary table can be viewed below. It demonstrates the massive range of emissions intensity between the various standards. It is worth noting here that the description the Indonesian government may have been using for ‘green’ cement could already meet SIG’s Scope 1 emissions intensity reduction for its cement in 2023 depending on the standard being used.

Table 1: Emissions intensity definition for cement as stated by standards, protocols, initiatives, and policies with stated numerical quantity targets. Source: Global Efficiency Intelligence.

Part of the problem here is that there is a language gap between the simple definition of a cement that is less CO₂ emissions-intensive than OPC and the technical definitions used in the specifications and standards. Simply describing a cement product as ‘green’ can potentially cover anything that is slightly better than OPC down to a bona-fide net-zero product. Added to this is pressure from the manufacturers of new and existing cement products that use less or no OPC for regulators to move to performance-based standards to replace existing prescriptive standards, because it makes it easier for their products to be used. For more on this issue see Global Cement Weekly #606. Cement associations such as Cembureau and the Global Cement and Concrete Association (GCCA) have also called in their respective net zero roadmaps for changes to the standards system to promote low-carbon cement and concrete products.

The answer to what is ‘green’ cement is whatever the promoters want it to be. So, it might be helpful if the use of the word ‘green’ were banned in connection to any marketing activity related to cement products. Everyone could then adopt some kind of universal grading system using simpler language. One approach might be to copy the colour-coding scheme used by hydrogen to describe how it is made. One could use yellow for limestone blends, silver for slag, orange for clay, black for OPC made with carbon capture and so on… but not green! Another route might be to mandate the use of the carbon labels that some cement producers have used for at least a decade. Or something like the alphabet energy rating system used in the UK and EU for electrical appliances could be used. It’s too much to hope for a global system but simpler systems in the main markets would make it much easier to determine what exactly is ‘green’ cement.

Peter Edwards, Editor of Global Cement Magazine, discusses ‘sustainable’ cement in The Last Word in the June 2023 issue

Delegates at the Global CemCCUS Conference last week applauded when Anders Petersen, the Senior Project Manager Brevik CCS, Heidelberg Materials said that the Brevik cement plant will be capturing CO₂ and permanently storing it within the year. Rightly so. This moment will mark a historic milestone for the sector when it arrives. Net zero cement production is coming.

Last week’s event in Oslo delivered an overview of the current state of carbon capture in the cement and lime industries. It explored the practical challenges these industries face in capturing CO₂ emissions and - crucially – then working out what to do with them afterwards. Incredibly, delegates were able to view the construction site of Heidelberg Materials’ forthcoming full-scale carbon capture unit at its Brevik plant in Norway. On the same day as the tour, Holcim broke ground on the Go4Zero carbon capture project at its Obourg plant in Belgium.

The key takeaway at the conference was that a (dusty) bulk solids sector is starting to work with handling (clean) gases in a way it hasn’t before. This recurred repeatedly throughout the conference. Petersen summarised it well when he described Brevik as a meeting pointing between the cement industry and the petrochemical one. It looks likely at present that there will not be a single predominant carbon capture technology that the majority of cement plants will deploy in the future. Similarly, CO₂ storage infrastructure and sequestration sites differ. Utilisation plans are less developed but also offer various options. Yet, if carbon capture becomes common at cement and lime plants, then these companies will need to learn how to filter and handle gases regardless of the capture method and destination for the CO₂. So presentations on filtration and compressors were a revelation at CemCCUS.

The key obstacle remains how to pay for it all. By necessity, most of the big early projects have received external funding, mostly from governments. Although, to be fair, the private companies involved are often investing considerable amounts of their own money and taking risks in the process too. In the European Union (EU) CO₂ is being priced via the Emissions Trading Scheme and investments are being made via the EU Innovation Fund and other schemes. In the US the approach lies in tax breaks, on-shoring and investment in new sustainable technologies.

However, other countries have different priorities. Or as a South Asian contact told Global Cement Weekly at a different conference, “How can our government think about sustainability when it can’t feed everyone?” The world’s biggest cement producing countries are China and India, and then the EU and the US follow. Brazil, Türkiye and Vietnam are at similar levels or not far behind. The EU and the US represent about 9% of global cement production based on Cembureau figures for 2022. China and India cover 61% of production. Neither of these countries has announced a plan to encourage the widespread construction of carbon capture units. Once China ‘gets’ cement carbon capture though, it seems plausible that it will dominate it as it has in many other sectors such as solar panel production. Exporters such as Türkiye and Vietnam will have to adapt to the rules of their target markets.

The march by the cement and lime sectors towards carbon capture has been long, difficult and expensive. It also has a long, long way to go. Yet, the next decade promises to be exciting as new technologies are developed and tested, full-scale projects are commissioned and CO₂ pipelines, sequestration sites and usage hubs come online. The next key milestones to look out for include the first full-scale installations using other capture methods (such as oxy-fuel kilns), the first CO₂ pipeline network that hooks up to a cement plant, the first land-based sequestration site, the first industrial hub that uses CO₂ at scale to manufacture a product, new government policies in China and India, and the first large unit that is funded entirely from private finance. To end on a positive note, a Cembureau representative at the Global CemCCUS Conference reckoned that Europe will be able to capture 12Mt/yr of CO₂ by 2030. If it happens, this will be a major achievement and a serious statement of intent towards net zero for the sector.

This short recap of the event barely touches the surface of what happened so be sure to read the full review of the 1st Global CemCCUS Conference.

The 2nd Global CemCCUS Conference will take place in Hamburg in May 2025

Germany: Buzzi subsidiary Deuna Zement plans to invest €350m to install a carbon capture system at its cement plant in Deuna, having completed two feasibility studies. The Thüringer Allgemeine newspaper has reported that, when operational in 2029, the system will capture 620,000t/yr of CO₂. This will make the Deuna cement plant carbon neutral. The company has applied for government funding for the project.

Buzzi Unicem said that its subsidiary is ‘Doing pioneering work on the path to decarbonising the cement industry.’ It added “The system will be efficient and take all relevant environmental considerations into account.”

India: Orient Cement has successfully commissioned Phase 2 of the new waste heat recovery (WHR) plant at its Chittapur cement plant in Karnataka. Reuters has reported that the new phase raises WHR power capacity at the plant to 10.1MW.