Displaying items by tag: Emissions
TCMA chair sets goal for net zero 2050
08 April 2024Thailand: Chair of the Thai Cement Manufacturers Association (TCMA), Dr Chana Poomee, announced the company’s new strategy, called 'TCMA Synergising the Actions toward Net Zero 2050'. This strategy aims to drive the cement industry towards clean energy transition, connect with global green funds and address climate change.
The vision involves four key missions for 2024-2026, including developing low-carbon cement, enhancing resource-efficient mining practices, building an integrated waste-to-value ecosystem, and transitioning to clean energy.
The TCMA also aims to reduce its CO₂ emissions by 6.9Mt/yr by 2030. Collaborations with various partners, including the Thailand Fellowship Cement Manufacturers and the Thai Bankers Association, are planned to leverage innovation and government policy support.
China: The UK-based Carbon Disclosure Project Carbon Majors database has released its Carbon Majors Database. The database quantifies the historical CO₂ emissions of 122 of the world's major emitters, among them the Chinese cement sector.
Notably, China's cement industry has been a significant contributor to global emissions. In the period up to the end of 2022, China's cement sector has produced 23,161Mt of CO₂, accounting for 1.3% of the global emissions recorded during this period. From 2016 to 2022, the cement industry in China emitted 8.16Bnt of CO₂, accounting for 3.2% of global emissions.
Figures for the cement sector include process emissions from the calcination of limestone, but exclude emissions from fuel and electricity used in production.
US fully adopts portland-limestone cement
04 April 2024US: The Portland Cement Association (PCA) has commended the Connecticut Department of Transportation's approval of Portland-limestone cement (PLC), marking its acceptance in all US states and the District of Columbia. PLC, with increased limestone content, maintains traditional portland cement's efficacy but reduces CO₂ emissions by up to 10%. The US avoided more than 4Mt of CO₂ emissions in 2023 by using PLC and other blended cements. This achievement coincides with growing cement consumption by state transportation departments, fuelled by the Bipartisan Infrastructure Law.
Mike Ireland, president and CEO of PCA, said "This milestone is a huge step forward for sustainable American construction. Switching to PLC promises to save millions of tonnes of CO₂. Using a lower-emission product that meets all the performance requirements of traditional cement means the construction sector can build with durability, safety and sustainability in mind."
Brazil: Votorantim Cimentos has made progress in reducing its carbon footprint, reporting embodied CO₂ emissions of 556kg/t of cement produced in 2023, a 4% year-on-year decrease. The company aims to reach a target of 475kg of CO₂/t by 2030, aligning with the Science Based Target initiative standards.
The company's decarbonisation strategy involves four stages: co-processing, which involves substituting fossil fuel with biomass and waste; use of cementitious materials to replace clinker; enhancing energy efficiency and use of renewable energy; and developing new technologies and materials, including carbon capture. In 2023, Votorantim Cimentos achieved a 31% global thermal substitution rate through co-processing, an increase from 26.5% in 2022, with a goal of reaching 53% by 2030. The clinker factor was reduced to 72.8% in 2023 from 73.9% in 2022. This reduction means a decrease in emissions, with a target clinker factor of 68% set for 2030. Additionally, 35.1% of the electricity consumed by Votorantim Cimentos in 2023 came from renewable sources, an increase from 22.9% in 2022, with an aim of 45% by 2030.
Álvaro Lorenz, global director of sustainability, institutional relations, product development, engineering, and energy at Votorantim Cimentos, said "The most competitive and sustainable companies will be those with the lowest emissions. In all countries where we operate, we are committed to advancing in our decarbonisation journey, in line with our goal of producing carbon-neutral concrete by 2050."
Votorantim Cimentos’ environmental efforts were recognised with an A score by CDP and a Top-Rated Industry company distinction by Sustainalytics in the Latin American building materials sector. The company also announced a US$989m investment to further reduce its CO₂ emissions. This includes a project at Salto de Pirapora to increase thermal substitution, with expected completion by 2028. Votorantim Cimentos has also started constructing a solar energy complex in Paracatu, with an estimated capacity of 470MWp.
South Korea: A recent study from Daejeon explored the potential of low-lime calcium silicate cement as a low CO₂ emission alternative to Ordinary Portland Cement. Researchers from the Korea Institute of Geoscience and Mineral Resources examined the setting and flow characteristics of a mixture of Ordinary Portland Cement and low-lime calcium silicate cement under carbonation curing conditions. The study was financially supported by the Ministry of Trade, Industry & Energy's industrial strategic technology development program.
The study aimed to explore the reaction and microstructural characteristics of these cement pastes. The low-lime calcium silicate cement was synthesised using limestone and silica fume, with varying proportions added to the Portland cement pastes. The research findings suggest improvements in compressive strength with the inclusion of 30% or more low-lime calcium silicate cement, highlighting its ability to enhance the durability and sustainability of construction materials.
US: A research team from Lehigh University has won a three-year, US$2m grant from the Department of Energy's industrial efficiency and decarbonisation office for a project on concrete decarbonisation. The team, including Carlos Romero, director of Lehigh's Energy Research Centre, aims to develop a sustainable concrete binder using calcined clay, reducing emissions associated with Ordinary Portland Cement production. The project collaborates with Buzzi Unicem USA and focuses on processing and testing calcined clay to mimic the properties of conventional cement.
Lehigh's team will explore various low-grade calcined clays, supplied by Buzzi, testing their compressive strength and durability. The goal is to halve the CO₂ emissions of traditional concrete mixes.
Chair of the Department of Civil and Environmental Engineering Shamim Pakzad said "I am excited about the expansion of the research portfolio of CEE departments into this area of greener cement, which opens many opportunities for future research and implementation in industry."
Caribbean Cement Company to expand production
27 March 2024Jamaica: Caribbean Cement Company's first phase of its expansion project is set for completion in 2025. The expansion will increase cement production by 30%.
Managing director Jorge Martinez said "When completed, this project will further reduce our CO₂ emissions and deliver increased output from 2600 to 2850t/day of clinker to meet the increased local demand for cement. We will also have the capacity to explore options for exporting to other countries within the Caribbean community. These exports will benefit Jamaica’s economy through foreign currency income."
The US$40m plant expansion in Rockfort, Kingston is financed by the company, with 150 workers already on the project. The expansion was announced in 2022 and aims to strengthen Jamaica's cement industry, reduce import reliance and support the regional construction sector. It will also support parent company Cemex's sustainability targets, including CO₂ emission reduction and optimisation of heat consumption in cement production, as part of its Future in Action programme.
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.
Switzerland: ABB and Captimise have enhanced their collaboration, focusing on advancing cost-effective carbon capture, utilisation, and storage (CCUS) technologies in the cement industry. Under a new Memorandum of Understanding, the partnership will develop various studies, including screening, feasibility, and FEED, aiding cement producers to identify efficient carbon capture solutions across their operations. The joint effort is expected to bolster the cement industry's efforts to meet its climate and net-zero targets.
CEO of Captimise, Mattias Jones, said “We draw on a track-record of more than 25 live case studies with CO₂ emitters across Europe and the US and know we’ll be able to support operations of all sizes in cement through combined CCUS, automation and electrification technologies.”
Global Business Unit Manager at ABB Process Industries, Max Tschurtschenthaler, said “Reducing the CO₂ emissions from cement manufacturing is a major challenge and a top priority for this industry. We are on a mission to make it more cost-effective. By combining our world-class automation, electrification and digital technologies with the know-how of partners like Captimise, we can further support the cement industry in achieving their climate and net zero targets.”
UK: Capsol Technologies has been selected to conduct a study on its carbon capture technology at Aggregate Industries Cauldon cement plant in Staffordshire. Owned by the Holcim Group, the company’s plant will undergo a feasibility study by Capsol Technologies for its CapsolEoP® carbon capture system. The potential for carbon capture at this plant is 600,000t/yr of CO₂. The CO₂ captured will be stored geologically through the nearby MNZ Cluster or HyNet North West.
CCO Johan Jungholm said “CapsolEoP® provides a cost-efficient carbon capture solution for cement, and our solution can be run on electricity alone without expensive heat integration or external steam supply. It offers flexibility in the optimisation of the designs, allowing for high capture rates, high reliability and low energy consumption."
The contract includes supplier input for the feasibility study, and further pre-FEED engineering if Capsol's technology is selected. The UK Government's Industrial Energy Transformation Fund (IETF) is funding the study, with Petrofac as Aggregate Industries engineer. This study is part of Peak Cluster's objective to reduce over 3Mt/yr of CO₂ from cement, lime, and refuse facilities by 2030. Capsol Technologies is focusing on the cement industry, which accounts for about 8% of global CO₂ emissions.