NEEDS - Conversion of Biogas into Electrical Energy
Focus of the NEEDS project is the production and conversion of biogas using high- or low-temperature fuel cells. This activity is aiming at the quantitative understanding, optimization and control of the behavior of the whole power generation system. For this purpose, the PSE group has developed steady state and dynamic models for Molten Carbonate Fuel Cell stacks [1-3] and low temperature fuel cells [4-11]. Regarding the anaerobic fermentation process, so far it is not possible to predict and fully control the behavior of biogas production plants (see Fig. 1), due to fluctuations of the feed composition and complex behavior of the microbial communities acting along the biomass digestion pathway. For this reason, the PSE group is intending to formulate and validate an advanced anaerobic digestion model, as the major prerequisite for the derivation of model based process control strategies.
 P. Heidebrecht and K. Sundmacher: Thermodynamic analysis of a cyclic water gas-shift reactor (CWGSR) for hydrogen production, Chem. Eng. Sci., 64(23):5057-5065, 2009.
 M. Pfafferodt, P. Heidebrecht and K. Sundmacher: Stack Modelling of a Molten Carbonate Fuel Cell (MCFC), Fuel Cells, 10(4):619-635, 2010.
 P. Heidebrecht, M. Pfafferodt and K. Sundmacher: Multiscale modelling strategy for structured catalytic reactors, Chem. Eng. Sci., 66(19):4389-4402, 2011.
 T. Kadyk, R. Hanke-Rauschenbach and K. Sundmacher: Nonlinear frequency response analysis of PEM fuel cells for diagnosis of dehydration, flooding and CO-poisoning, J. Electroanal. Chem., 630:19-27, 2009.
 B. Bensmann, M. Petkovska, T. Vidaković, R. Hanke-Rauschenbach and K. Sundmacher: Nonlinear Frequency Response of Electrochemical Methanol Oxidation Kinetics: A Theoretical Analysis, J. Electrochem. Soc., 157(9):B1279-B1289, 2010.
 C. Kunde, R. Hanke-Rauschenbach, M. Mangold, A. Kienle, K. Sundmacher, S. Wagner and R. Hahn: Temperature and Humidity Control of a Micro PEM Fuel Cell Stack, Fuel Cells 10(6):949-959, 2010.
 R. Lemoine-Nava, R. Hanke-Rauschenbach, M. Mangold and K. Sundmacher: The gas diffusion layer in polymer electrolyte membrane fuel cells: A process model of the two-phase flow, Int. J. Hydrogen Energy, 36(2):1637-1653, 2011.
 T. Kadyk, R. Hanke-Rauschenbach and K. Sundmacher: Nonlinear frequency response analysis for the diagnosis of carbon monoxide poisoning in PEM fuel cell anodes, J. Appl. Electrochem., 41(9):1021-1032, 2011.
 R. Hanke-Rauschenbach, M. Mangold and K. Sundmacher: Nonlinear dynamics of fuel cells: a review, Reviews in Chem. Eng., 27:23-52, 2011.
 T. Kadyk, S. Kirsch, R. Hanke-Rauschenbach and K. Sundmacher: Autonomous potential oscillations at the Pt anode of a polymer electrolyte membrane fuel cell under CO poisoning, Electrochim. Acta, 56(28):10593-10602, 2011.
 T. Kadyk, R. Hanke-Rauschenbach and K. Sundmacher: Nonlinear frequency response analysis of dehydration phenomena in polymer electrolyte membrane fuel cells, Int. J. Hydrogen Energy, 2011, in press.