TY  - JOUR
A1  - Hoffstadt, Kevin
A1  - Nikolausz, Marcell
A1  - Krafft, Simone
A1  - Bonatelli, Maria
A1  - Kumar, Vivekanantha
A1  - Harms, Hauke
A1  - Kuperjans, Isabel
T1  - Optimization of the ex situ biomethanation of hydrogen and carbon dioxide in a novel meandering plug flow reactor: start-up phase and flexible operation
JF  - Bioengineering
KW  - methanation
KW  - plug flow reactor
KW  - bubble column
KW  - biomethane
KW  - P2G
Y1  - 2024
U6  - http://dx.doi.org/10.3390/bioengineering11020165
SN  - 2306-5354
VL  - 11
IS  - 2
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Hoffstadt, Kevin
A1  - Cheenakula, Dheeraja
A1  - Nikolausz, Marcell
A1  - Krafft, Simone
A1  - Harms, Hauke
A1  - Kuperjans, Isabel
T1  - Design and construction of a new reactor for flexible biomethanation of hydrogen
JF  - Fermentation
N2  - The increasing share of renewable electricity in the grid drives the need for sufficient storage capacity. Especially for seasonal storage, power-to-gas can be a promising approach. Biologically produced methane from hydrogen produced from surplus electricity can be used to substitute natural gas in the existing infrastructure. Current reactor types are not or are poorly optimized for flexible methanation. Therefore, this work proposes a new reactor type with a plug flow reactor (PFR) design. Simulations in COMSOL Multiphysics ® showed promising properties for operation in laminar flow. An experiment was conducted to support the simulation results and to determine the gas fraction of the novel reactor, which was measured to be 29%. Based on these simulations and experimental results, the reactor was constructed as a 14 m long, 50 mm diameter tube with a meandering orientation. Data processing was established, and a step experiment was performed. In addition, a kLa of 1 h−1 was determined. The results revealed that the experimental outcomes of the type of flow and gas fractions are in line with the theoretical simulation. The new design shows promising properties for flexible methanation and will be tested.
KW  - methanation
KW  - plug flow reactor
KW  - bubble column
KW  - bio-methane
KW  - power-to-gas
Y1  - 2023
U6  - http://dx.doi.org/10.3390/fermentation9080774
SN  - 2311-5637
N1  - The article belongs to the Special Issue Fermentation Processes: Modeling, Optimization and Control
VL  - 9
IS  - 8
SP  - 1
EP  - 16
PB  - MDPI
CY  - Basel
ER  -