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ePaper created 2014-05-07, 13:23:14 | version 1.30.01
125 Dipl.-Ing. Matthias Stier Phone +49 711 970-4075 matthias.stier@igb.fraunhofer.de Prof. Dr. Dieter Bryniok Phone +49 711 970-4211 dieter.bryniok@igb.fraunhofer.de Funding We would like to thank the German Federal Ministry of Educa- tion and Research (BMBF) for funding the project “ECOX – Enzymatic-chemocatalytic oxidation cascades in the gas phase”, promotional reference 031A168A. Project partners Leibniz Institute for Catalysis at the University of Rostock LIKAT, Rostock | Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Working Group Processing of Biotechnical Products, Halle possible to simultaneously measure all the components of the reaction both in the aqueous phase and in the gas phase with a response time in the seconds range (Fig. 4). Initial tests show that with this method it is possible to provide a complete and reliable analysis of the dismutase reaction. Outlook The processing of the formaldehyde dismutase and its im- mobilization on carrier materials were completed successfully. The immobilized enzyme indicates very high enzyme activi- ties. This and the fully functional test facility with online mass spectrometry are excellent preconditions for the development of an enzyme technical process. The next step in the research project is the continuous pro- duction of methanol and formic acid with the immobilized formaldehyde dismutase in the test facility. In the subsequent project phase the enzyme technical process is coupled with the chemo-catalytic process to produce formaldehyde from biogas. In addition to this, the technical process for the production of methanol and formic acid from biogas is a model for further enzyme technical processes with gaseous substrates in the gas phase and in combination with chemocatalytic reactions. It therefore represents an important step in the direction of re- covering biogenic materials via gaseous intermediate products such as biogas or synthesis gas. 1 Combined chemocatalytic-enzymatic process for the production of methanol and formic acid from biogas. 2 Online mass spectrometer. 3 Pressure enzyme reactor. 4 Simultaneous measurement of the educt (formalde- hyde) and of the products (methanol, formic acid, methyl formate) in the dismutase-catalyzed reaction. 432 Contacts concentration[g / l] time [d] 8 8 6 6 4 4 2 2 0 0 1000 2000 3000 4000 5000 6000 7000 80000 9000 16 16 14 14 10 10 12 12 20 20 methanol formaldehyde 18 18 concentrationofmethylformate[mg / l] formic acid methyl formate