One of the major goals of current research on energy conversion is the mitigation of CO 2 emission. A beneficial scenario for CO 2 utilization is the catalytic conversion of industrial waste or process gases into valuable products. Within the crossindustry approach of Carbon2Chem the synthesis of methanol from steel mill exhaust gases is a promising way to close the carbon cycle based on additional sustainably produced H 2 . New catalyst requirements have to be met due to fluctuating feed gas composition and availability as well as gas separation and purification issues.

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The influence of impurities in steel mill exhaust gases on ternary Cu/ZnO/Al2O3 catalysts was studied for conventional methanol synthesis, which is one of the central reactions within the cross‐industrial approach of Carbon2Chem®. A series of hydrocarbons was identified as inert spectators for methanol synthesis. Several catalyst poisons like N‐containing compounds or O2 show reversible characteristics at low pressure. However, by increasing the partial pressure of O2, poisoning becomes irreversible, indicating different poisoning mechanisms concerning the reversibility of deactivation.

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The influence of oxygen poisoning on a state‐of‐the‐art multipromoted iron‐based industrial catalyst for ammonia synthesis as well as the effectivity of different gas purification methods to prevent oxygen poisoning for experiments on laboratory scale were studied in detail. Additionally, the observed results were compared to a common oxygen poisoning test from literature, which on the one hand confirmed its usability in a wide range of conditions, but on the other hand also demonstrated the limitations of this test.

Within the Carbon2Chem® network, basic research is mandatory for a successful implementation and realization of sustainable technologies for CO2 emission reduction. For this purpose, the exchange of knowledge between the project partners in the individual subareas is as essential as obtaining precise data on the fundamental parameters on a laboratory scale in order to transfer them later to large‐scale plants. Therefore, the Carbon2Chem® laboratory offers a platform to gain detailed insights into the individual sub‐processes and to then apply these findings at the technical center in Duisburg.