Displaying items by tag: Research

Signapore: Researchers at the Nanyang Technological University in Singapore (NTU Singapore) have successfully used bacteria to combine two abundant waste streams into clinker-free biocement. NDTV news has reported that the scientists developed the material from by combining calcium ions with urea in a mixture of industrial carbide sludge and urine. The process takes place at room temperature, reducing CO₂ emissions while also offering waste management benefits.

The NTU Singapore team is presently testing the biocement on artificial beaches. It will subsequently investigate other possible large-scale applications around Singapore.

Canada: Progressive Planet Solutions has successfully produced a new supplementary cementitious material (SCM) called PozDE from diatomaceous earth. The company says that it developed PozDE using calcium bentonite-containing diatomaceous earth from the Red Lake mine in Kamloops, British Colombia. The SCM’s seven-day and 28-day strength activity index (SAI) values are 101% and 120% those of ordinary Portland cement (OPC) respectively, while its water demand is lower at 98%.

Chief operating officer Ian Grant said “It is uncommon to see SCMs exceed the 7-day strength of the control Portland, so we are excited to see better strength while indicating lower water demand."

India: UltraTech Cement has entered into a collaboration with Finland-based Coolbrook to implement the latter’s roto dynamic heater (RDH) electric kiln technology in Indian cement plants. RDH technology uses renewable power to heat kilns to up to 1700°C.

UltraTech Cement managing director Kailash Jhanwar said “UltraTech is a forerunner in utilising renewable energy in its manufacturing operations. We are constantly looking at opportunities to improve process efficiency and reduce greenhouse gas emissions from our operations.” Jhanwar concluded “We believe that our collaboration with Coolbrook will help to further accelerate the decarbonisation of our operations.”

Coolbrook executive chair Ilpo Kuokkanen said “India is one of the most important potential markets for Coolbrook, as we want to make a global impact on CO₂ emission reductions. Cooperation with India’s largest cement producer UltraTech is a significant step in our strategy to decarbonise heavy industry processes globally. UltraTech is also an excellent addition to our comprehensive and responsive partnership ecosystem spanning across leading industrial actors, academic institutions, and the public sector.”

UK: The UK Department for Business, Energy and Industrial Strategy (BEIS) has granted Carbon Clean Euro701,000 under its Carbon Capture, Utilisation and Storage (CCUS) Innovation 2.0 programme. Carbon Clean says that it will partner with energy engineering company Doosan Babcock and Newcastle University to develop carbon capture systems which apply non-aqueous solvent (NAS) and rotating packed bed (RPB) technology together for the first time. The partners seek to overcome the challenges of scale and cost in order to advance the widespread deployment of CCUS systems.

The CCUS Innovation 2.0 programme is part of the UK government’s Euro1.17bn Net Zero Innovation Portfolio scheme.

US: The US Department of Energy has granted Solidia Technologies US$2.1m in funding for the development and testing of carbonation methods for its Solidia Cement. Solidia will research synthetic supplementary cementitious materials (SCMs) production methods using direct CO₂ capture and utilisation.

CEO Russell Hill said “We are proud to partner with the US Department of Energy to continue innovating and ultimately deliver on our mission to provide commercially viable decarbonisation technologies and sustainable solutions for the global construction and building materials industries. The funding will advance our carbon capture, utilisation and storage (CCUS) technologies and synthetic SCMs that can be easily integrated into Portland cement-based concrete formulations, offering manufacturers a solution that is sustainable environmentally and economically.”

Mexico: Cemex and Coolbrook have signed a memorandum of understanding to test technology to electrify the cement kiln heating process. Coolbrook says that its Roto Dynamic Heater (RDH) technology can heat a cement kiln to 1700°C using electrical power. If generated from renewable sources this could potentially remove around 45% of the carbon emissions in cement production that normally arise from the use of fossil fuels. The companies expect the technology to be ready for commercial use at an industrial scale in 2024. They will jointly evaluate the best production site to test and develop this technology.

Ilpo Kuokkanen, the executive chair of Coolbrook, said "Coolbrook has set a target to build a comprehensive ecosystem around its revolutionary technology and to test its use in as many industrial processes as fast as possible. Together with Cemex, we can bring the technology to cement production and achieve significant emission reductions in one of the most energy and CO₂-intensive industrial processes.”

Finland-based Coolbrook is a technology and engineering company that is developing processes to replace the burning of fossil fuels in major industrial sectors. Its RDH has potential applications in cement, steel and chemical production process. Its Roto Dynamic Reactor (RDR) is intended to eliminate CO₂ emissions from the steam cracking process used in the production of plastic.

UK: A team of researchers from six UK universities has filed a patent for a clinkerless cement product called Cambridge Electric Cement. Local press has reported that the project, called UK Fires, saw researchers successfully produce the cement using renewable power from recycled cement powder and ground granulated blast furnace slag (GGBFS). Following its successes, UK Fires has obtained a further Euro2m in funding from the UK Engineering and Physical Sciences Research Council (EPSRC) to continue its work into the range of concrete wastes suitable for use in Cambridge Electric Cement production.

India: Dalmia Cement (Bharat) has signed a memorandum of understanding (MOU) with Denmark-based FLSmidth to collaborate in the research and development of sustainable solutions for cement manufacturing. The agreement has been arranged under the ‘Green Strategic Partnership’ initiatives between Denmark and India that cover energy and climate change.

Under the MOU both companies will cooperate on a range of areas such as substituting conventional energy supplies with renewable sources and working towards CO₂ emissions abatement. Both companies have committed to contributing research and development towards eventually building an industrial scale production plant where the new concepts can be further tested.

Mahendra Singhi, the managing director and chief executive officer of Dalmia Cement (Bharat) said, “In alignment with the ambitious net zero vision of our Prime Minister Narendra Modiji and given the strength and stature of our respective organisations, this association will provide futuristic solutions to the cement and concrete industry to emerge clean and green.” He added that India and Dalmia Cement in particular were keen to develop a roadmap for the implementation of Industry 4.0 with totally decarbonised cement plants and a ‘lighthouse’ cement plant.

Cement shortages were being reported in the US media last week in Alabama and South Carolina. The owner of a ready-mixed concrete supplier in South Carolina was blaming it on labour and supply shortages. Dan Crosby, the president of Metrocon, told Fox News that his business could only take on 60% of the work it could normally cope with due to the issue despite demand for construction growing in the state. Meanwhile, the Alabama Concrete Industries Association said that its home state saw a 14% increase in the demand for concrete in 2021 but that a cement shortage might cause delays to projects. The association also pointed the blame at labour and supply issues. It pointed out that high demand for concrete during the winter prevented inventory being built up and then the annual cement plant maintenance breaks in the spring added to the problems. Once contractors actually secured supplies of cement they then faced further delays due to a nationwide truck driver shortage!

Graph 1: Annual rolling cement shipments in the South of the US. Source: USGS.

Data from the United States Geological Survey (USGS) doesn’t especially shed light on the situation in Alabama and South Carolina. Alabama was the fifth largest cement producing state in the country in January 2022 but this is unsurprising as it’s the state with the fifth largest cement production capacity. Rolling annual data on Portland and blended cement shipments by origin show the effects of the coronavirus outbreak in the south from the start of 2020 to January 2022. Shipments took a dive in 2020 and then mostly recovered in 2021. However, Alabama, Kentucky and Tennessee saw shipments rise from 7.1Mt pre-pandemic to 7.6Mt in January 2022. South Carolina’s shipments grew from 3Mt to 3.2Mt. Regionally, the North East had a similar pattern although, unlike the South, shipments have surpassed those at the start of 2020. The Midwest and West were different with a general upwards trend over the two years, although the West softened slightly from mid-2021 onwards. Overall the US as a whole has seen its shipments grow throughout this period.

Ed Sullivan from the Portland Cement Association (PCA) told the May 2022 issue of Global Cement Magazine that the US cement sector did well in 2021 with a 4.1% year-on-year rise in sales to 104Mt. However, he flagged up supply chain problems that actually slowed growth, led by a lack of staff.

The other point along these lines that Sullivan made was that imports of cement might not necessarily be able to compensate for domestic supply issues due to global demand for shipping post-coronavirus. USGS data placed imports to the US at 13.7Mt in 2019 compared to 16.3Mt in 2021. Notably, Cemex restarted one production line in 2021 at its CPN cement plant in Sonora State in Mexico to export cement to the west of the US. In March 2022 it added that it was going to restart another line at the plant also. It’s not alone though as GCC reported in January 2022 that a line at one of its plants in Chihuahua, Mexico, was exporting cement to Texas. Sullivan reckoned that January 2022 was ‘weak’ but that it was followed by an ‘extremely strong’ February 2022. The first quarter results from Holcim and CRH seem to back this up with the former describing the period as ‘outstanding’ and the region leading its sales and earnings growth rate globally. CRH reported strong demand in central and southern regions.

As the US economy restarted following the peak of the early coronavirus waves in 2020, various supply chain issues have manifested. Staff shortages are one issue and this can also worsen other logistic problems. The south seems particularly vulnerable to all of this as it is both the country’s largest cement market and because demand has held up. In January 2022 research by the International Monetary Fund (IMF) identified several reasons for staff shortages in the US and the UK. These included increased inactivity among older workers, the so called ‘She-cession’ (where female employment has overly reduced due to coronavirus trends) and shifting worker preferences amid strong labour demand.

Staff shortages are expected to sort themselves out throughout 2022 but favourable forecast demand for cement in the US is balanced by inflationary pressure. Persistent low staffing levels could further add to inflation growth. The US cement sector may be doing well at the moment but even success carries risks.

Global Cement’s Robert McCaffrey will be giving a keynote presentation at the IEEE-PCA Cement Conference in Las Vegas on Tuesday 3 May 2022. The May 2022 issue of Global Cement Magazine, including interviews with PCA chief executive officer Mike Ireland and chief economist Ed Sullivan, is available to download now.

Germany: ThyssenKrupp Uhde, Holcim and the Technische Universität Berlin have started a joint project to investigate the use of a novel amine scrubbing technology for carbon capture. The goal is to significantly reduce CO₂ emissions from existing cement plants and at the same time utilise the captured CO₂ for other applications. This includes the development of new mass transfer process equipment that is more efficient and resilient to contaminations. The project is being funded by the German Federal Ministry for Economic Affairs and Climate Action.

The equipment is being tested using exhaust gas at Holcim’s Beckum plant. Various possibilities for using the captured CO₂ are also being examined, such as manufacturing methanol or sustainable fuels. The aim is develop a technology that can be retrofitted at existing cement plants.

Ralph Kleinschmidt, head of technology, innovation and sustainability at ThyssenKrupp Uhde said, "Amine scrubbing is already commonly used to recover CO₂ from process gases or exhaust gases. Now, we are developing the technology further and optimising it for the cement industry. Additional applications for capturing CO₂ direct at source, such as in waste incineration plants, are also possible."Arne Stecher, head of decarbonisation at Holcim Germany added that the company is testing different processes to find the best carbon capture technology.