Two reports out this week have looked at the carbon footprint of the cement industry. The first, a technology roadmap by the Cement Sustainability Initiative (CSI) and the International Energy Agency (IEA), laid out a technology pathway for the sector to reduce its direct CO2 by 24% from current levels by 2050 to meet the IEA’s 2°C scenario (2DS). The second, a report by the CDP (formerly the Carbon Disclosure Project) on the progress of 13 major cement producers to reduce their emissions, was a progress report on the business readiness for a low carbon economy transition.
Graph 1: European Union industry emissions by sector, 2013 - 2017. Source: Sandbag, European Commission.
The scene was set last week when the environmental campaign group Sandbag picked up on the latest emission data from the European Union (EU) Emissions Trading Scheme (ETS). Industrial emissions as a whole rose by 2% year-on-year to 743Mt in 2017. The cement and lime industry reported a rise of 3% to 148Mt in 2017 from 144Mt in 2016. As Sandbag reported, industrial emissions have remained ‘stubbornly high’ for the duration of the ETS. It then went on to say that, “the EU urgently needs a new industrial strategy to bring about radical industrial process changes and/or carbon capture and storage, especially for the high-emitting steel and cement sectors.”
The CDP’s report provided a global scorecard on the readiness of the cement industry to adapt to a low-carbon future. Unfortunately, the report used data from self-reporting questionnaires and it lacked data from the two largest Chinese cement producers, Anhui Conch and China National Building Materials (CNBM), although it did try to compensate for this. The CDP assessed companies across four key areas aligned with the recommendations from the Task Force on Climate-related Financial Disclosures (TCFD).
Graph 2: Opportunity vs. risk for low-carbon transition. Source: Building Pressure report, CDP.
Surprisingly, the study, even with its limitations, found regional variation. As can be seen in Graph 2, the Indian cement producers came out on top from the criteria used: transition risks, physical risks, transition opportunities and climate governance and strategy. CDP pinned this on better access to alternative materials such as fly ash and slag coming from other carbon intensive sectors, such as thermal power generation and steel production. Reported process emissions measured by the clinker ratio for the Indian companies was 69% versus 78% for the other companies. They also benefited from newer cement plants driven by high market growth in the region compared to older plants in Europe.
The technology roadmap from the CSI and the IEA set out key actions for the industry to take by 2030 to have at least a 50% chance of achieving the 2°C 2DS scenario followed by a possible transition pathway that could be achieved through technology, legislation and investment. The key actions are protecting carbon pricing mechanisms from carbon leakage, putting new technology into action and supporting it by legislation, and greater government support for products with a lower clinker factor.
The CSI’s and IEA’s targets for 2030 included reaching a clinker to cement ratio of 0.64 in 2030 from 0.65 in 2014, a thermal energy intensity of clinker of 3.3GJ/t from 3.5GJ/t, an electricity intensity of cement of 87kWh/t from 91kWh/t and a alternative fuel co-processing rate of 17.5% from 5.6%. Perhaps the most optimistic is a CO2 capture and storage amount of 14MtCO2/yr in 2030 from nothing at the moment. This last target seems unlikely to be achieved given the lack of projects outside of the pilot stage, but it’s not impossible.
This column barely touches on the detail within either report or even the latest data from the EU ETS. Both reports offer ways forward to meet the 2°C global warming target outlined in the Paris Agreement. It’s easy to be pessimistic given the on-going clash between environmental optimism and business logic but both reports offer a way forward. The CDP report sets out a baseline with a look to the future, whilst the CSI/IEA roadmap offers what it says is a realistic route to reach that 2DS target. Lastly, if the CDP’s assessment is correct about the Indian producers then it’s possible that other developing cement industries may inherently be cleaner due to their use of newer plants and equipment. If worldwide government support can be provided for use of alternative fuels and materials on a much larger scale, as well as all the other recommendations, then meeting the Paris agreement may be easier than expected as new markets build new production capacity.
Two examples of carbon capture utilisation and sequestration projects will be covered in the May 2018 issue of Global Cement Magazine
