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Methods for Current Efficient CO₂-Neutral Production of Synthetic Gas

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Methods for Current Efficient CO₂-Neutral Production of Synthetic Gas (Volume 2) (English shop)

Friedrich-Wilhelm Speckmann (Author)


Table of Contents, PDF (510 KB)
Extract, PDF (700 KB)

ISBN-13 (Hard Copy) 9783736971929
ISBN-13 (eBook) 9783736961920
Language English
Page Number 178
Lamination of Cover matt
Edition 1.
Book Series Energie & Nachhaltigkeit
Volume 2
Publication Place Göttingen
Place of Dissertation Stuttgart
Publication Date 2020-04-08
General Categorization Dissertation
Departments Electrical engineering
Keywords Hydrogen, Power-to-Gas, Power-to-X, Rectifier, Electrolysis, Gas Quality, Energy Efficiency, Carbon Neutral, Synthetic Gas, Electrode Kinetics, Gas Bubble Evolution, Bubble Nucleation, Bubble Dissolution, Electrochemical Impedance Spectroscopy, Gas Bubble Tracking, Current Profiles, Automated Gas Bubble Detection, Methanation, Plasmolysis, CO2 Reduction, Ion Pump, Ion Conductivity, Renewable Methane, Process Current Source, Ripple Factor, Direct Current Quality, Pulsed Currents, Oxygen Ion Extraction, Partial Load, Internal Resistance, Overpotential, Alkaline Electrolysis, Oxygen Impurities, Wasserstoff, Gleichrichter, Methanisierung, Plasma, Elektrolyse, H2, Gasblasenerkennung, Strom-zu-Gas, Elektrolyse, Gasqualität, Elektrodenkinetik, Entwicklung der Gasblasen, Aktuelle Profile, Automatisierte Gasblasen-Erkennung, Methanisierung, Plasmolyse, CO2-Reduzierung, Ionenpumpe, Ionenleitfähigkeit, Erneuerbares Methan, Prozess Stromquelle, Welligkeitsfaktor, Gleichstrom-Qualität, Gepulste Ströme, Sauerstoff-Ionen-Extraktion, Teillast, Interner Widerstand, Überpotential

Hydrogen generated by water electrolysis with electricity from renewable energy sources has the potential to be the sustainable energy carrier for the 21st century. However, the successful large-scale integration of electrolyzer systems into electrical grids with volatile energy generation requires performance improvements in energy efficiency as well as in partial load operation. This thesis presents research on the electrochemical characterization of a self-designed alkaline electrolyzer and investigates the influence of modified direct current profiles on overpotentials. The variable current forms are provided by a newly developed process current source structure that functions as a dynamic output voltage rectifier. Additionally, this work highlights the possibility of further processing the generated hydrogen to methane via low-pressure glow discharge plasmolysis. This process employs a ceramic ion conductor in order to extract oxygen ions directly from the plasma and thus, reduces the recombination rate of carbon monoxide and oxygen. The combined energy conversion systems result in a CO2-neutral approach of synthetic gas generation.