Displaying items by tag: Alternative Fuels

Thailand: ThyssenKrupp Polysius says that it has successfully supplied and installed a Prepol SC alternative fuels (AF) system at a 12Mt/yr cement plant in Thailand. The system will supply the plant's four lines with 4000t/day of AF.

ThyssenKrupp Polysius' Asia Pacific CEO Lukas Schoeneck said "Asia Pacific, with its tremendous municipal solid waste (MSW) problem, is ideal when it comes to replacing coal with AF. The Prepol SC technology significantly reduces the need to treat MSW before using the inherent calorific value. Additionally, it helps to further reduce the ambitious CO₂ limit targets in the region."

Colombia: The Science-Based Targets Initiative (SBTi) has validated Grupo Argos Subsidiary Cementos Argos’ CO₂ emissions reduction goals. Cementos Argos aims to reduce its Scope 1 and Scope 2 CO₂ emissions in line with a well-below 2°C climate change scenario by 2030. Its strategy includes increasing co-processing of alternative fuel (AF), reducing its cement’s clinker factor, optimising its heat and electricity consumption, investing in cleaner technologies, increasing the share of renewable power it uses and diversifying its product range to include more low-carbon products.

Austria: Lafarge Zement plans to invest Euro8m in the establishment of the Recycling Centre Mannersdorf at its 1.2Mt/yr Mannersdorf cement plant in Lower Austria. Niederösterreichische Nachrichten News has reported that the facility will process demolition waste into alternative raw materials for use in the cement producer’s operations.

Plant manager Helmut Reiterer said “The Recycling Centre Mannersdorf is of great importance for the construction industry. It enables people to build in a much more environmentally friendly way, increases the recycling rate and strengthens the domestic circular economy.”

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."

Mexico: Cemex Mexico plans to install hydrogen injection systems at four cement plants across Mexico. The producer will use the technology to increase alternative fuel (AF) substitution at the plants by 8 - 10%. A 40% reduction in Scope 3 purchased fuel emissions forms part of Cemex's 2020 - 2030 CO₂ emissions reduction strategy. Through the decarbonisation and circular economy pillars of its Future in Action plan, the group aims to become carbon neutral by 2050.

Cemex Mexico president Ricardo Naya said "Hydrogen is a key technology to accelerate the implementation of our climate action roadmap."

The El Financiero newspaper has reported that Cemex set a new group record AF substitution rate of 34% in September 2022. It uses hydrogen at all of its European cement plants and at one plant in the Dominican Republic.

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."

Brazil: Votorantim Cimentos has revised its Scope 1 CO₂ emissions reduction goal down to 475kg/t of cementitious product by 2030, from 520kg/t previously. The new target is 8.7% lower than the previous one, which it set in November 2020. Votorantim Cimentos previously reduced its emissions per tonne by 20% between 1990 and 2021. The group's targeted reduction from a 2018 base year now equates to 25%. The Science-Based Targets Initiative (SBTi) validated the ambitious target on 1 December 2022.

Votorantim Cimentos expects to achieve its aim through increased alternative fuel (AF) co-processing, substitution of supplementary cementitious materials, improved efficiency and use of renewable power and the development of new technologies, including carbon capture.

The group's global sustainability, institutional relations, product development and engineering director Álvaro Lorenz said “The fight against the negative effects of climate change is at the heart of our strategy and reflects our focus on competitiveness and on creating a positive legacy. The most competitive businesses will be those with the lowest greenhouse gas emissions. After all, the environmental crisis is also an economic and social crisis. The validation of our new target by SBTi reinforces our commitment and continuous efforts toward the net-zero agenda.”

This week’s Virtual Global CemPower Seminar included an assessment on how interventions in European power markets might affect efforts to decarbonise industry. The presentation by Thekla von Bülow of Aurora Energy Research outlined how different countries in the European Union (EU) were implementing the forthcoming electricity price cap on ‘inframarginal’ producers to 180Euro/MWh. Each of these different proposals will entail differing levels of structural change to the wholesale energy market. For example, the Agency for the Cooperation of Energy Regulators (ACER) has recommended establishing a series of frameworks including a stronger focus on Contracts for Difference (CfD) schemes to promote renewable energy sources.

These changes are a consequence of the EU’s response to the Russian invasion of Ukraine. Gas prices surged and then pushed up other energy prices in turn to record levels. As this column covered in September 2022, the price of electricity shot up in the summer of 2022 whilst at the same time Russian gas imports ceased. Cembureau, the European Cement Association, called for urgent action to be taken to support cement production due to large increases in the cost of electricity. For example, in its latest overview of the German cement industry, the German Cement Works Association (VDZ) said that the sector has an electrical consumption of 30TWh/yr. Clearly energy policy is of great interest to the industry.

Since then, in late September 2022, Heidelberg Materials’ chief executive officer Dominik von Achten told Reuters that his company was preparing to shift production at its Germany-based plants to times and days when power prices are lower including at the weekend. However, this was dependent on negotiations with the unions. Von Achten also warned of plant closures being a possibility. Then, in November 2022, it emerged that Zementwerk Lübeck’s grinding plant in northern Germany had reportedly been only operating its grinding plant at night and at the weekend due to high electricity prices. Also in November 2022 European energy news provider Energate Messenger reported that Heidelberg Materials was preparing its cement plants in Germany with emergency backup power to keep critical services running in the case of electricity power cuts. One view from the outside came from equipment supplier FLSmidth’s third quarter results where it noted it had, “...started to see the first cases of budget constraints imposed by customers to counter the increasing energy cost. A high utilisation is still driving service activity in Europe, but some customers have put large capital investments on stand-by and we have experienced a slowdown in decision-making processes.” On the other hand it also pointed out that this trend is driving sales of products that helped reduce energy usage and/or switch to alternative fuels.

On the financial side, Holcim reiterated in its half-year report that, on the country, level the group uses a mixture of fixed price contracts, long-term power purchase agreements, on-site power generation projects and increased consumption of renewable energy at competitive prices to reduce the volatility from its energy bills. Both Cemex and Heidelberg Materials said similar things in their third quarter results conference calls. Cemex said that nearly 70% of its electricity requirements in Europe were fixed in 2022 with nearly 30% fixed for 2023. It went on to reveal that around 20% of its total costs for cement production in Europe derived from its electricity bill. Interestingly, it added that a higher proportion of its electricity costs in Germany were fixed than elsewhere in Europe, due to the use of a waste-to-electricity system owned by a third party that is fed with refuse-derived fuel (RDF), but that it was more exposed to floating fuel rates in Spain. Heidelberg Materials added that it supported energy price caps in both Germany and the EU whether they affected it directly or not.

So far it has been a mild start to winter in Europe. This may be about to change with colder weather forecast for December 2022. This will stress test the EU’s energy saving preparations and in turn it could force the plans of industrial users, such as the cement sector, to change. Some of the cement producers have commented on the financial implications of rising fuel costs but they have been quieter publicly about how they might react if domestic consumers are prioritised. Plant shutdowns throughout cold snaps are the obvious concern but it is unclear how likely this is yet. The variety of energy policies between fellow member states, their own supply situations and the differences between cement plants even in the same country suggest considerable variation in what might happen. If large numbers of cement plants do end shutting throughout any colder periods, then one observation is that it will look similar to winter peak shifting (i.e. closure) of plants in China. The more immediate worry in this scenario though is whether these plants actually reopen again.

The proceedings pack from the Virtual Global CemPower Seminar is available to buy now

UAE: The Ministry of Climate Change and Environment (MOCCAE) and Emirates RDF have signed four memoranda of understanding (MOU) with Fujairah Cement Industries, JSW Cement, Lafarge Emirates and Star Cement to use alternative fuels produced by the Emirates RDF in the Umm Al Quwain Emirate in their manufacturing operations.

Emirates RDF’s plant treats and transforms municipal solid waste (MSW) from Umm Al Quwain and the emirate of Ajman into refuse derived fuel (RDF). The ministry said in a statement that MOUs are part of its support for integrated waste management projects that treat waste and transform it into economic resources in line with the Ministerial Decree No. 98 of 2019 on using RDF in cement factories. Cement plants in the UAE will be encouraged to meet 10% percent of their total thermal energy needs using RDF.

Mariam bint Mohammed Almheiri, Minister of Climate Change and Environment, said, “The participation of the private sector is a main pillar of the UAE’s green economy transition and the adoption of circular economy methods, the foremost of which is integrated waste management. The signing of the agreements with a group of leading cement factories in the country to partially use alternative fuel in their operations is a high-impact step within our efforts to implement integrated waste management and reduce harmful emissions.”

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