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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 14a
SUMMARY:Novel technology for production of pure H2 and N2 with CO2 capture from BFG, COG and BOFG
DESCRIPTION:RGH2’s novel chemical looping based system can directly convert CO, CO2 and N2 rich blast furnace gas (BFG), coke oven gas (COG) and basic oxygen furnace gas (BOFG) into high purity H2 with inherent CO2 capture. The produced hydrogen can be utilized to substitute coal in the blast furnace and decarbonize steel plants, or to decarbonize plant-integrated heat and power generation systems. 

Based upon results in RGH2’s 100 kW OSOD On-Site-On-Demand demo plant (TRL 6) [1], the process produces high-purity H2 (>99.99%) and pure N2 (98.5%) as products, while sequestrating a carbon dioxide rich stream without energy penalty [2, 3].

In the specific case of nitrogen-containing gases (BFG, COG, BOFG), RGH2’s 3-step system enriches the CO2 content up to 50%. Only a downstream separation of nitrogen is required for CO2 sequestration up to 99% capture rate. Thus, the whole system can be an important building block to decarbonize the integrated steel plants.

[1] Voitic G, Legerer C, von Hofen F, Beese-Vasbender P. Deponiegas zur Wasserstoffproduktion nutzen. GWF Gas + Energie. Sep. 2022; 163(Sep). https://gwf-gas.de/aktuelle-ausgabe-9/ 
[2] Bock S, Zacharias R, Hacker V. Co-production of pure hydrogen, carbon dioxide and nitrogen in a 10 kW fixed-bed chemical looping system. Sustain. Energy Fuels Mar. 2020; 4(3):1417–26. https://doi.org/10.1039/C9SE00980A.
[3] Bock S, Zacharias R, Hacker V. High purity hydrogen production with a 10 kWth RESC prototype system. Energy Convers. Manag. Sep. 2018; 172(May):418–27. https://doi.org/10.1016/j.enconman.2018.07.020.

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