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Direct DME synthesis on CZZ/H-FER from variable CO$_{2}$/CO syngas feeds

Wild, Stefan; Polierer, Sabrina; Zevaco, Thomas A.; Guse, David; Kind, Matthias; Pitter, Stephan; Delgado, Karla Herrera; Sauer, Jörg

Catalyst systems for the conversion of synthesis gas, which are tolerant to fluctuating CO/CO$_{2}$ gas compositions, have great potential for process-technical applications, related to the expected changes in the supply of synthesis gas. Copper-based catalysts usually used in the synthesis of methanol play an important role in this context. We investigated the productivity characteristics for their application in direct dimethyl ether (DME) synthesis as a function of the CO$_{2}$/CO$_{x}$ ratio over the complete range from 0 to 1. For this purpose, we compared an industrial Cu/ZnO/Al$_{2}$O$_{3}$ methanol catalyst with a self-developed Cu/ZnO/ZrO$_{2}$ catalyst prepared by a continuous coprecipitation approach. For DME synthesis, catalysts were combined with two commercial dehydration catalysts, H-FER 20 and γ-Al$_{2}$O$_{3}$, respectively. Using a standard testing procedure, we determined the productivity characteristics in a temperature range between 483 K and 523 K in a fixed bed reactor. The combination of Cu/ZnO/ZrO$_{2}$ and H-FER 20 provided the highest DME productivity with up to 1017 g$_{DME}$ (kg$_{Cu}$ h)$^{-1}$ at 523 K, 50 bar and 36 000 ml$_{N}$ (g h)$^{-1}$ and achieved DME productivities higher than 689 g$_{DME}$ (kg$_{Cu}$ h)$^{-1}$ at all investigated CO$_{2}$/CO$_{x}$ ratios under the mentioned conditions. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000129844
Veröffentlicht am 05.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Thermische Verfahrenstechnik (TVT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2046-2069
KITopen-ID: 1000129844
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Erschienen in RSC Advances
Verlag Royal Society of Chemistry (RSC)
Band 11
Heft 5
Seiten 2556-2564
Nachgewiesen in Dimensions
Web of Science
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