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Energies 2018, 11(6), 1344; https://doi.org/10.3390/en11061344

Effect of Different Operating Temperatures on the Biological Hydrogen Methanation in Trickle Bed Reactors

State Institute of Agricultural Engineering and Bioenergy, University of Hohenheim, Garbenstraße 9, 70599 Stuttgart, Germany
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Received: 13 April 2018 / Revised: 20 May 2018 / Accepted: 23 May 2018 / Published: 25 May 2018
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Abstract

To improve the reactor efficiency, this study investigated the influence of temperature on the biological hydrogen methanation (BHM) in trickle-bed reactors (TBR). Rising temperatures increase the metabolic activity of methanogenic microorganisms, thus leading to higher reactor specific methane formation rates (MFR). In order to quantify the potential for improved performance, experiments with four different operating temperatures ranging from 40 to 55 °C were carried out. Methane content increased from 88.29 ± 2.12 vol % at 40 °C to 94.99 ± 0.81 vol % at 55 °C with a stable biological process. Furthermore, a reactor specific methane formation rate (MFR) of up to 8.85 ± 0.45 m3 m−3 d−1 was achieved. It could be shown that the microorganisms were able to adapt to higher temperatures within hours. The tests showed that TBR performance with regard to BHM can be significantly increased by increasing the operating temperature. View Full-Text
Keywords: biological hydrogen methanation; Trickle-Bed-Reactor; operating temperature; Power-to-Gas; hydrogen; renewable energy biological hydrogen methanation; Trickle-Bed-Reactor; operating temperature; Power-to-Gas; hydrogen; renewable energy
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Lemmer, A.; Ullrich, T. Effect of Different Operating Temperatures on the Biological Hydrogen Methanation in Trickle Bed Reactors. Energies 2018, 11, 1344.

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