(Invited) Carbon-6 Based Sustainable Value Chains Towards Specialties and (Aviation) Fuels Based on Low-Temperature PEM-Water Electrolysis and Syngas Fermentation

Abstract

Sustainable value chains by coupling electrolysis and fermentation The energy transition also needs a raw material transition. The process sequence of water electrolysis and syngas fermentation was found to provide access to C4-C6 based value chains based on CO2 and H2. In the German Kopernikus and Rheticus projects Siemens Energy Global GmbH & Co. KG (SE) and Evonik Operations GmbH focused on a sustainable synthesis of C6 oxygenates for specialty chemicals, food additives and even fuels1,2. Routes to kerosene exist. The technology was successfully implemented in chemical plant environment at Marl with an annual production capacity of ~15t. The scaling into the multimillion-ton annual production range depends on various boundary conditions, such as the availability of renewable energy at competitive cost, the political situation as well as its customer acceptance. Silyzer 300 PEM electrolysis SE is one of the key companies willing to implement the German National Hydrogen Strategy3 until 2030. The current product is named Silyzer 300® with 17,5 MW rated power at begin of life on system level4. The stack core consists of a non-pressurized array with 24 modules, producing around 335 kg of hydrogen per hour. SE is investing more than 60 Mio.€ for the massive ramp-up of electrolyzer production capacity through automation5. Series production (SEGIWA) and de-risking, qualification for large-scale application (= de-risking; DERIEL) are funded within the H2Giga program6. Perspectives in AEM-Membranes Anion Conducting Membranes offer design and operation options in polymer membrane water electrolysis. Electrochemical data from the project AEMready will be presented with respect to noble metal free catalysts and choices of membranes. Acknowledgement The investigations reported on the value chain was partly funded by the BMBF under the contract numbers Kopernikus I & II (FKZ: 03SFK2J0-2), Rheticus I & II (FKZ: 03SF0574B). Scaling is BMBF-supported by the H2Giga initiative within the projects SEGIWA (FKZ: 03HY121A) and DERIEL (FKZ: 03HY122A). AEM activities are funded by AEMready (FKZ:03SF0613B). References Haas, R. Krause, R. Weber, M. Demler, G. Schmid, Nature Catalysis, 2018, 1, 32–39.https://www.bmbf.de/de/fuer-eine-klimafreundliche-industrie-kohlendioxid-und-wasserstoff-als-rohstoffe-fuer-12543.html .https://www.bmwk.de/Redaktion/EN/Publikationen/Energie/the-national-hydrogen-strategy.pdf?__blob=publicationFile&v=6.https://www.siemens-energy.com/global/en/offerings/renewable-energy/hydrogen-solutions.html?gclid=EAIaIQobChMIsuu-wMHV-wIVktZ3Ch24ngoYEAAYASAAEgJUF_D_BwE.https://press.siemens-energy.com/global/en/pressrelease/new-production-facility-berlin-siemens-energy-wants-eliminate-worlds-most-potent .https://www.wasserstoff-leitprojekte.de/projects/h2giga .