Public Workshop on Carbon Capture for the Cement and Lime Industry hosted by ANICA and AC²OCem Project on 7 - 8 March 2023

The abatement of CO₂ emissions from industry processes is recognised as a key challenge for achieving carbon neutrality by 2050. With regard to CO₂ reduction in the clinker production process, it is now widely acknowledged that the abatement of process-related CO₂ emissions will require the capturing and sequestration or utilisation of CO₂ from cement plants. Against this background the cement industry and research partners have investigated different options for capturing CO₂ from cement flue gases. During the past three years carbon capture options for the cement and lime industry have been further developed in the ACT- funded international research projects AC²OCem and ANICA. In the ANICA project (Advanced Indirectly Heated Calcium Looping Process), efficient concepts for CO₂ capture in cement and lime production plants by means of indirect heating have been developed. The AC²OCem project (Accelerating Carbon Capture using Oxyfuel technology in Cement production) focussed on the further development of oxyfuel technology and its retrofitability.

The consortia of AC²OCem and ANICA projects held a public workshop on carbon capture technologies which was organised by VDZ on 7th and 8th March 2023. Within this workshop results from both projects as well as lighthouse projects in the cement industry were presented and discussed.



7 March 2023

10:00 – 10:30RegisterVDZ
10:30 – 10:45IntroductionK. Fleiger (VDZ)
10:45 –
Pilot testing of the IHCaL processC. Hofmann (TUDA)
11:15 –
Reactor development for IHCaL technology: Heat pipes, two stage calcinerK.Böge (FAU) / 
Myrto Zeneli (CERTH)
11:45 –
LEILAC TechnologyJ. Driver (CALIX)
12:15 – 13:00Lunch Break 
13:00 – 13:30Design of an IHCaL-Demonstration plant at Lime Plant HönnetalM. Greco-Coppi (TUDA) /
A. Dinkova (TKIS)
13:30 – 14:00Oxyfuel burner technology and impact on oxyfuel calcinerC. Kroumian (USTUTT) /
I. Veckenstedt (TKIS)
14:00 – 14:30CI4C Oxyfuel PilotT. Kaschke (CI4C)
14:30 – 15:00Coffee break 
15:00 – 15:30Integration of 1st gen oxyfuel technology to existing cement plantsK. Peloriadi (CERTH)/
F. Carrasco (Heidelberg Materials)
15:30 – 16:00Oxyfuel technology for new built plantsK. Fleiger (VDZ) /
L. Andersson (SINTEF)
16:00 – 16:30Norcem Brevik ProjektA. Burns (Heidelberg Materials)
19:00 – 21:00

Evening event (dinner buffet in VDZ)


8 March 2023

09:00 – 09:30Techno-economic assessment of
IHCaL integration in lime and cement plants
Y. Huang (ULSTER)
09:30 – 10:00TCA and LCAO. Cavalett (NTNU) / 
A. Reyes-Lua (SINTEF)
10:00 – 10:30Ca-Looping, CalBy2030C. Abanades (CSIC)
10:30 – 11:00Coffee break 
11:00 – 11:30Holcim CCUS Projects Lägerdorf / HöverA. Stecher (Holcim)
11:30 – 12:00Summary and end of workshopK. Fleiger (VDZ)
12:00 – 13:00Lunch 

AC²OCem - Accelerating Carbon Capture using Oxyfuel Technology in Cement Production

The project investigates the existing 1st generation oxyfuel technology and an innovative 2nd generation oxyfuel concept with the ultimate goal of reducing CO₂ avoidance cost, increasing plant efficiency and strengthening the overall competitiveness.

Background and goals of the project

There is a consensus on the key role of carbon capture, utilisation and storage (CCUS) in the reduction of industrial CO2 emissions [1]. An aggregated CO2 amount of 1.8 Gt until 2030 and 12.2 Gt until 2050 must be captured to meet ambitious CO2 reduction targets, while 40 % of those emissions cuts must take place in the European industry [2]. In 2016, around one-fourth of the CO2 emitted from major industries was related to cement production [2].

Referring to previous carbon capture and storage (CCS) projects in the field of cement production, oxyfuel is identified as the most cost-effective solution, in comparison with post combustion technologies, for decarbonisation of cement plants [3, 4]. Hence, the AC2OCem project aims to contribute to the long-term European CO2 reduction target and to accelerate carbon capture by maturing the oxyfuel technology in the cement industry. The project investigates the existing 1st generation oxyfuel technology and an innovative 2nd generation oxyfuel concept with the ultimate goal of reducing CO2 avoidance cost, increasing plant efficiency and strengthening the overall competitiveness.

The project goals are defined based on the existing knowledge on an oxyfuel cement process obtained via previous and ongoing carbon capture projects in the cement industry. This will allow a narrowing of the technological gaps for promoting the oxyfuel technology to accelerate the large-scale demonstration with the perspective of near-zero CO2 cement production.

The project consists of six work packages, management and dissemination, advanced oxyfuel burners, optimization of oxyfuel calciner, process simulations and techno-economic studies of 1st and 2nd generation oxyfuel technologies and a life cycle assessment. Within the project, pilot-scale experiments, as well as analytical studies, will be performed to bring the key components of oxyfuel cement plants to TRL 6 with the aim of reducing the time to market of the oxyfuel technology in the cement sector.


[2] Quale S, Rohling V. The European Carbon dioxide Capture and Storage Laboratory Infrastructure (ECCSEL). Green Energy & Environment 2016;1(3):180–94
[3] CEMCAP Project: Project funded by European Union´s Horizon 2020 research and innovation program under grant agreement No. 641185; Available from: www.sintef.no/projectweb/cemcap
[4] European Cement Research Academy (ECRA). The cement industry´s approach to car-bon capture: ECRA CCS project poster. [August 13, 2018]; Available from: www.sintef.no/globalassets/sintef-energi/cemcap/ecra_ccs_project_poster_v3.pdf


The German partners of the AC²OCEM project are supported by the Federal Ministry of Economic Affairs and Climate Action on the basis of a decision of the German Bundestag. The project AC²OCEM is funded through the ACT programme (Accelerating CCS Technologies, Horizon2020 Project No 294766). Financial contributions made from the Research Council of Norway, (RCN), Norway; the German Federal Ministry of Economic Affairs and Climate Action (BMWK), Germany; the Swiss Federal Office of Energy (SFOE), Switzerland;General Secretariat for Research and Development (GSRT), Greece; and the French Environ-ment & Energy Management Agency (ADEME), France.

Person to contact

Do you have questions regarding this project?

Dr Kristina Fleiger

+49(0) 211 45 78 254

Other items of possible interest


Research projects

CEMCAP - CO₂-Abscheidung in der Zementproduktion

Unter Berücksichtigung der experimentellen Ergebnisse und einer techno-ökonomischen Analyse hat CEMCAP eine Entscheidungsgrundlage für CO₂-Capture-Technologien in der Zementindustrie entwickelt. Dies soll die europäischen Zementhersteller in die Lage versetzen, werksspezifische CCS-Wirtschaftlichkeitsanalysen zu erstellen und sich an eine Welt mit begrenzten Kohlenstoffemissionen anzupassen. Aus europäischer Perspektive zielt CEMCAP darauf ab, das Portfolio an kosten- und ressourceneffizienten Optionen für CCS und damit die Möglichkeiten zur Reduzierung der Treibhausgasemissionen zu erweitern.

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The aim of the CLEANKER (CLEAN clinKER) project is to perform large-scale testing of this technology as an integrated method (Technology Readiness Level 7). It is planned to treat 4 000 m³/h exhaust gas in a demonstration plant to be connected to an existing kiln line at the Buzzi Unicem works in Vernasca in Italy.

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