THYSSENKRUPP INDUSTRIAL SOLUTIONS AG

polysius® pure oxyfuel technology for CO2 capture in cement production

The research company “CI4C” – Cement Innovation for Climate, founded by the four cement manufacturers Buzzi Unicem SpA – Dyckerhoff GmbH, HeidelbergCement AG, Schwenk Zement GmbH & Co. KG and Vicat S.A. has commissioned thyssenkrupp’s Polysius business unit to build a polysius® pure oxyfuel kiln system on the site of the Mergelstetten cement plant in southern Germany.

The polysius pure oxyfuel process is a new type of clinker production process in which the otherwise normal ambient air is replaced by pure oxygen in the kiln combustion process. Compared with conventional plants, this novel process aims to concentrate, capture and reuse almost 100% of the CO2 produced in a cost-effective manner. The medium-term goal is to further process the captured CO2 with the help of renewable energies, e.g. into so-called “refuels”, in order to produce climate-neutral synthetic fuels, such as kerosene for air traffic.  

Advantages of polysius pure oxyfuel technology

In the clinker burning process commonly used to date, oxygen from the ambient air supplied is used. The oxygen content of the ambient air is around 21%. By using the ambient air, nitrogen in particular is introduced into the system, so that the concentration of CO2 in the exhaust gas is only about 25% - 30%.

By introducing pure oxygen with the polysius pure oxyfuel process, atmospheric nitrogen is eliminated from the clinker burning process. The gas volume is reduced considerably and allows a high concentration of CO2 in the exhaust gas, so that almost 100% of the climate-damaging carbon dioxide can be captured.

Complex exhaust gas recirculation, as envisaged in the first-generation oxyfuel process, can be dispensed with here. This leads to overall reduced investment and operating costs for the polysius pure oxyfuel process.

www.thyssenkrupp-polysius.com

x

Related articles:

Issue 2021-4 THYSSENKRUPP INDUSTRIAL SOLUTIONS AG

polysius® pure oxyfuel – investigating the industrial-scale use of carbon capture technology in cement production

The production of cement releases large quantities of carbon dioxide (CO2). Only a third of these CO2 emissions result from the combustion of fossil fuels such as coal or petroleum coke, while the...

more
Issue 2020-1-2 HEIDELBERGCEMENT AG

Cement producers have founded an Oxyfuel Research Corporation

On 06.12.2019, the four European cement producers Buzzi Unicem – Dyckerhoff, HeidelbergCement AG, Schwenk Zement KG and Vicat founded the joint research corporation CI4C – Cement Innovation for...

more
Issue 2020-1-2 WO 2019/211202 A1

Oxyfuel clinker production with special oxygen addition

(22) 26.04.2019 (43) 07.11.2019 (57) Methods and systems for the production of cement clinker, wherein an oxygen-containing gas, which has a proportion of 15 vol.% or less of nitrogen and a proportion...

more
Issue 2021-6 US 2021/0198142 A1

Oxyfuel clinker production with special oxygen addition

(22) 26.04.2019 (43) 01.07.2021 (57) Processes and plants for producing cement clinker, in which an oxygen-containing gas having a proportion of 15% by volume or less of nitrogen and a proportion of...

more
Issue 2020-5-6 THYSSENKRUPP INDUSTRIAL SOLUTIONS AG

Low-CO2 cement production with activated clay: thyssenkrupp to build first industrial-scale plant in Cameroon

thyssenkrupp is to fit the first cement plant with a system for the production of calcined clay for the Dutch-based company Cimpor Global Holdings. The technology developed by thyssenkrupp lowers CO2...

more