Displaying items by tag: Selective Catalytic Reduction

Asia Cement unveiled a selective catalytic reduction (SCR) unit at its Jecheon plant this week. The Korea Cement Association (KCA), government representatives and staff from other cement companies were present at a demonstration. The US$25m project has been supported by the Ministry of Industry and Trade. It was originally announced in late 2023, has been running on a pilot basis for two months, and is expected to start full operation shortly. The cement sector in South Korea will be subject to tighter emissions controls in mid-2027 and further SCR installations are expected.

Earlier in 2025 the KCA estimated that installing SCR units on all 35 active clinker production lines in the country would cost around US$675m with an additional annual running costs. One point to note here is that one of the local sector’s commonly used alternative fuels (AF), waste synthetic resin, impedes the SCR process. Subsequently, it has to be run at higher temperature, which increases running costs.

The local cement industry has faced a mixed response to its uptake of AF in recent years. One strand of this has been a movement against so-called ‘trash cement.’ This culminated in the Ministry of Climate, Energy and Environment amending the Waste Management Act in November 2025 to make it mandatory for cement products to disclose on the packaging the means to check which ‘waste’ materials were used in their manufacture. This appears to include both supplementary cementitious materials (SCM) and AF. The government is now intending to make it possible for citizens to check the type of cement used in newly-constructed buildings. The KCA reported that the share of blended cements (i.e. those made with SCMs) was 15% in 2024. The rate had gradually decreased over the last decade from 19% in 2015. South Korean cement producers had a AF co-processing rate of 35% in 2021. The main fuels being used in this way were waste synthetic resin, waste tires and waste rubber, with the first being used the most.

Graph 1: Cement sales in South Korea, 2019 - 2025. Source: Korea Cement Association.

Meanwhile, cement producers in South Korea have turned to exports in 2025 in response to poor construction levels and growing input costs. The KCA revealed this week to local press that exports are expected to grow by 52% year-on-year to 4.5Mt in 2025 from 3Mt in 2024. Local shipments, however, are anticipated to fall by 16.5% to 36.5Mt from 42.9Mt. Producers have focused their export strategies towards South America and Africa in response to competition in the export market in South-East Asia from China and Vietnam, producers. For example, Halla Cement started targeting Cameroon and Guinea in 2025 following previous favourite destinations such as Peru and Chile. Exports are still lower than they were in the mid-2010s. In 2015, for example, the country exported 7.3Mt of cement and clinker. However, the share of the share of exports to total sales is at its highest level for at least a decade.

The necessity of running kilns at certain levels rather than simply idling them has also emerged in recent reporting. The reason given was to “...maintain a minimum allocation of carbon emission allowances.” The detail is lacking but this may sound familiar to readers familiar with the European Union (EU) Emissions Trading Scheme (ETS). Following the financial crash in 2008, for example, an over-allocation of carbon credits enabled some producers to make money despite falling demand for cement. This is not to say that the same thing is happening in South Korea. Merely, that any ETS can potentially face structural issues in a declining market.

The South Korean cement market is facing tough times, with the KCA further anticipating a decline of 1.3% in 2026. Environmental regulations such as the new emissions controls are further putting up costs. One peculiarity of the local market is the scrutiny that the easiest routes to decarbonisation, SCAs and AFs, are facing. Giving the public the tools to check this kind of information is admirable. Yet it creates extra hurdles for a sector trying to decarbonise at the same time as a construction market construction. Good luck!

The Global CemFuels Asia Conference will take place on 2 - 3 February 2026 in Bangkok

Germany: Thomas Zement has ordered a selective catalytic reduction (SCR) unit from GEA for its Erwite cement plant to reduce its NO_x emissions. The order includes two reactors for selective catalytic reduction (SCR) including handling of the flue gas transport by induced draft (ID) fans and integration into plant. The contract also includes engineering services as well as the supply, installation and commissioning of steel structures, SCR catalysts, ID fans, heating circuits, duct connection and adaptation of NH₃ injection from existing storage tanks. Production will continue at the site during the installation of the SCR unit.

China: Anhui Conch’s Jining Conch subsidiary has signed a contract worth US$23m with Conch Design Institute for selective catalytic reduction (SCR) units. Conch Design Institute will supply SCR denitration technology to Jining Conch including engineering design, equipment supply, construction and installation, engineering supervision and project management. The project is expected to be completed by the end of June 2019.

Germany: Two cement plants are installing selective catalytic reduction (SCR) units ahead of new environmental emissions limits that will start in 2019. CRH Opterra Zement’s Karsdorf plant has started a Euro23m upgrade project to its emissions systems. The plant will install SCR units on each of its production lines. Work on the upgrade is scheduled to be completed by the start of 2019.

Holcim WestZement is also installing a SCR unit purchased from Yara at its Beckum cement plant. The Euro14.2m project will start trial operation by the end of 2018.