Displaying items by tag: circular economy

Belgium: The EU Innovation Fund has awarded Euro4.5m to a consortium consisting of Lhoist, gas provider Fluxys Belgium, concrete products company Prefer and carbonation technology developer Orbix. The collaborators are working on a project called CO2ncrEAT. The project will carbonate steel sector by-products with captured CO₂ from Lhoist's Hermalle lime plant to produce alternative building materials. CO2ncrEAT will be the first project to employ Orbix's innovative technique for the purpose. Fluxys Belgium's pipeline technology will convey the Hermalle plant's emissions over a distance of 2km to a Prefer concrete blocks plant.

The consortium said that it will use 12,000t/yr of CO₂ to produce 100,000t/yr of reduced-CO₂ concrete blocks. The use of alternative raw materials in the blocks will further reduce their carbon footprint by 8000t/yr.

Lhoist Western Europe managing director Vincent Deleers said “The project fits perfectly with our willingness to actively develop CO₂ capture and sequestration technologies that are essential to the sustainability of our industry. We are delighted that our work on innovative solutions has been recognised by the European Innovation Fund and we look forward to working with our partners to bring CO2ncrEAT to the next level.”

Ecuador: Encapsulation in concrete served to destroy 110t of cocaine in Ecuador during the first nine months of 2022. The figure corresponds to 61% of cocaine seized by authorities during the period. Local press reported that the mixed slurry forms strong precast concrete elements, from which the cocaine is impossible to extract. Encapsulation accelerates destruction of the drug by a factor of 20 compared to incineration, with removal rates of up to 1500kg/hr.

Ecuadorian cocaine seizures at ports alone increased by 42% year-on-year throughout 2022, necessitating the operational improvements in disposal methods.

Thailand: Siam Cement Group (SCG) will invest US$2.89bn in new renewable power infrastructure across its businesses. Major growth areas include 3000MW of solar power generation capacity. This will increase group solar capacity by a factor of 15. Saur Energy News has reported that the renewable power projects will support the company’s on-going decarbonisation investments in cement and other businesses.

SCG is committed to achieving a circular business model and net zero CO₂ emissions by 2050.

India: Adani Cement has announced the launch of a dedicated waste processing subsidiary called Geoclean. Geoclean will process waste for recycling and use as alternative fuel (AF) in its cement production and alternative raw materials in its production of other building materials. Geoclean inherits the projects and all 14 waste management plants of its predecessor company Geocycle India. The Orissa Diary newspaper has reported that Geoclean aims to help Adani Cement to co-process 3.7Mt of AF over the five-year period up to the end of 2027. This would raise its subsidiaries ACC and Ambuja Cements’ AF substitution rate to 30%, from 6% in 2021.

Adani Cement CEO Ajay Kapur said "We are committed to building a sustainable future by adopting clean and green technologies in our overall business. We have always believed in environmental conservation, and are committed to making the optimum contribution towards co-processing waste responsibly for a sustainable future. Adani Cement will continue its endeavours to promote sustainability and build a cleaner and greener planet."

Colombia: Cemex has announced the launch of the Tunjuelo Circularity Centre at its former Tunjuelo quarry near Bogotá. Having rebuilt parts of the 50m-deep quarry with demolition waste, Cemex will now work on its ecological restoration, while continuing to receive excavation waste for reconstruction of the ground. It will meanwhile divert demolition waste deliveries for recycling in aggregate production. In Bogotá, Cemex has launched an initiative for urban construction partnerships in collaboration with local authorities. It will also collect municipal solid waste (MSW) there for use in its cement production and collect its used plastic cement bags for recycling in building materials production.

Cemex’s Colombia and Peru president Alejandro Ramírez said "This is a pioneering model for Cemex in the construction materials industry globally, which we aim to position as a benchmark for circularity within the sustainable development of large cities in Colombia and the world. A piece of land that supplied materials for Bogotá's development for decades has received construction and demolition waste for its redevelopment and was transformed into a green area to the south of the city, an epicenter of the circular economy and an opportunity for urban development for the capital city of Colombia." 


Dominican Republic: Cemex Dominicana has announced the signing of a new sustainability agreement with food producer Nestlé Dominicana. Under the agreement, Cemex Dominicana will co-process Nestlé Dominicana's non-recyclable high-calorific solid industrial waste as alternative fuel (AF) in its cement plant.

Cemex's Dominican Republic, Puerto Rico and Haiti regional director José Antonio Cabrera said "This agreement with Nestlé allows us to continue promoting our Future in Action strategy by operating our cement plant with AF." He concluded "We are committed to becoming a net-zero CO₂ company."

France: Authorities have granted construction and environmental clearances to N + P Group to set up its planned Isbergues Subcoal solid recovered fuel (SRF) plant in Hauts-de-France. When commissioned in 2024, the 150,000t/yr-capacity plant will be France's first to commercially produce the coal alternative for cement and other industries. The company says that its products will be able to eliminate 100,000t/yr of industrial CO₂ emissions nationally. N + P Group will use locally sourced waste at the unit.

Chief development officer Lars Jennissen said “Obtaining the environmental and construction permit is a major achievement for us, and we thank our colleagues and partners for their hard work in realising this important milestone. The new location will contribute to the circular economy in Hauts-de-France by converting regional non-recyclable wastes into new resources for regional customers, and it offers a massive potential CO₂ savings for the French market.”

Europe: The Carbon Negative Biofuels from Organic Waste (Carbiow) project has received EU funding under the Horizon Europe initiative. Carbiow seeks to develop a dense, dry homogenous marine and aviation biofuel by carbonising gasification ash with oxygen and captured CO₂ from cement plants. 12 consortium members from the Benelux, Germany, Nordic countries, Slovenia and Spain are participating in the project.

In Australia and New Zealand, four producers operate a total of six integrated cement plants, with another 13 grinding plants situated in Australia. This relatively small regional cement industry has been on a decades-long trajectory towards ever-greater sustainability – hastened by some notable developments in recent weeks.

Oceania is among the regions most exposed to the impacts of climate change. In Australia, which ranked 16th on the GermanWatch Global Climate Risk Index 2021, destructive changes are already playing out in diverse ways.¹ Boral reported 'significant disruption' to its operations in New South Wales and southeast Queensland due to wet weather earlier in 2022. This time, the operational impact was US$17.1m; in future, such events are expected to come more often and at a higher cost.

Both the Australian cement industry and the sole New Zealand cement producer, Golden Bay Cement, have strategies aimed at restricting climate change to below the 2° scenario. Golden Bay Cement, which reduced its total CO₂ emissions by 12% over the four-year period between its 2018 and 2022 financial years, aims to achieve a 30% reduction by 2030 from the same baseline. The Australian Cement Industry Federation (CIF)'s 2050 net zero cement and concrete production roadmap consists of the following pathways: alternative cements – 7%; green hydrogen and alternative fuels substitution – 6%; carbon capture – 33%; renewable energy, transport and construction innovations – 35% and alternative concretes – 13%, with the remaining 6% accounted for by the recarbonation of set concrete.

Australia produces 5.2Mt/yr of clinker, with specific CO₂ emissions of 791kg/t of clinker, 4% below the global average of 824kg/t.² Calcination generates 55% of cement’s CO₂ emissions in the country, and fuel combustion 26%. Of the remainder, electricity (comprising 21% renewables) accounted for 12%, and distribution 7%. Australian cement production has a clinker factor of 84%, which the industry aims to reduce to 70% by 2030 and 60% by 2050. In New Zealand, Golden Bay Cement's main cement, EverSure general-purpose cement, generates CO₂ at 732kg/t of product.³ It has a clinker factor of 91%, and also contains 4% gypsum and 5% added limestone.

Alternative raw materials

Currently, Australian cement grinding mills process 3.3Mt/yr of fly ash and ground granulated blast furnace slag (GGBFS). In Southern Australia, Hallett Group plans to commission its upcoming US$13.4m Port Augusta slag cement grinding plant in 2023. The plant will use local GGBFS from refineries in nearby Port Pirie and Whyalla, and fly ash from the site of the former Port Augusta power plant, as well as being 100% renewably powered. Upon commissioning, the facility will eliminate regional CO₂ emissions of 300,000t/yr, subsequently rising to 1Mt/yr following planned expansions. Elsewhere, an Australian importer holds an exclusive licencing agreement for UK-based Innovative Ash Solutions' novel air pollution control residue (APCR)-based supplementary cementitious material, an alternative to pulverised fly ash (PFA), while Australian Graphene producer First Graphene is involved in a UK project to develop reduced-CO₂ graphene-enhanced cement.

Golden Bay Cement is investigating the introduction of New Zealand's abundant volcanic ash in its cement production.

Fuels and more

Alternative fuel (AF) substitution in Australian cement production surpassed 18% in 2020, and is set to rise to 30% by 2030 and 50% by 2050, or 60% including 10% green hydrogen. In its recent report on Australian cement industry decarbonisation, the German Cement Works Association (VDZ) noted the difficulty that Australia's cement plants face in competing against landfill sites for waste streams. It described current policy as inadequate to incentivise AF use.

Cement producer Adbri is among eight members of an all-Australian consortium currently building a green hydrogen plant at AGL Energy’s Torrens Island gas-fired power plant in South Australia.

Across the Tasman Sea, Golden Bay Cement expects to attain a 60% AF substitution rate through on-going developments in its use of waste tyres and construction wood waste at its Portland cement plant in Northland. The producer will launch its new EcoSure reduced-CO₂ (699kg/t) general-purpose cement in November 2022. In developing EcoSure cement, it co-processed 80,000t of waste, including 3m waste tyres. The company says that this has helped in its efforts to manage its costs amid high coal prices.

Carbon capture

As the largest single contributor in Australia's cement decarbonisation pathway, carbon capture is now beginning to realise its potential. Boral and carbon capture specialist Calix are due to complete a feasibility study for a commercial-scale carbon capture pilot at the Berrima, New South Wales, cement plant in June 2023.

At Cement Australia's Gladstone, Queensland, cement plant, carbon capture is set to combine with green hydrocarbon production in a US$150m circular carbon methanol production facility supplied by Mitsubishi Gas Chemical Company. From its commissioning in mid-2028, the installation will use the Gladstone plant's captured CO₂ emissions and locally sourced green hydrogen to produce 100,000t/yr of methanol.

More Australian cement plant carbon capture installations may be in the offing. Heidelberg Materials, joint parent company of Cement Australia, obtained an indefinite global licence to Calix's LEILAC technology on 28 October 2022. The Germany-based group said that the method offers effective capture with minimal operational impact.

Cement Australia said “The Gladstone region is the ideal location for growing a diverse green hydrogen sector, with abundant renewable energy sources, existing infrastructure, including port facilities, and a highly skilled workforce." It added "The green hydrogen economy is a priority for the Queensland government under the Queensland Hydrogen Industry Strategy.”

Logistics

Australian and New Zealand cement facilities' remoteness makes logistics an important area of CO₂ emissions reduction. In Australia, cement production uses a 60:40 mix of Australian and imported clinker, while imported cement accounts for 5 – 10% of local cement sales of 11.7Mt/yr.

Fremantle Ports recently broke ground on construction of its US$35.1m Kwinana, Western Australia, clinker terminal. It will supply clinker to grinding plants in the state from its commissioning in 2024. Besides increasing the speed and safety of cement production, the state government said that the facility presents 'very significant environmental benefits.'

Conclusion

Antipodean cement production is undergoing a sustainability transformation, characterised by international collaboration and alliances across industries. The current structure of industrial and energy policy makes it an uphill journey, but for Australia and New Zealand's innovating cement industries, clear goals are in sight and ever nearer within reach.

References

1. Eckstein, Künzel and Schäfer, 'Global Climate Risk Index 2021,' 25 January 2021, https://www.germanwatch.org/en/19777

2. VDZ, 'Decarbonisation Pathways for the Australian Cement and Concrete Sector,' November 2021, https://cement.org.au/wp-content/uploads/2021/11/Full_Report_Decarbonisation_Pathways_web_single_page.pdf

3. Golden Bay Cement, 'Environmental Product Declaration,' 12 May 2019, https://www.goldenbay.co.nz/assets/Uploads/d310c4f72a/GoldenBayCement_EPD_2019_HighRes.pdf

Greece: Titan Group has set new CO₂ reduction targets by adding Scope 3 emissions. Titan Group had previously committed to a 21% Scope 1 emissions reduction and a 42% Scope 2 emissions reduction per tonne of cementitious material between 2020 and 2030. Titan Group reduced its total CO₂ emissions by 20% between 1990 and 2021, and by 5.5% year-on-year in the third quarter of 2022. Its latest targets are currently under review by the Science-Based Targets Initiative (SBTi).

Titan Group chair Marcel Cobuz said “The initiatives in our decarbonisation roadmap offer significant business growth opportunities. Our technology and sales teams across all our markets are focused on decarbonising our operations more quickly and offering our customers more and more sustainable and circular solutions.”