Browsing Faculty of Engineering by Author "Krieg, Henning M."
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Comparison of ionically and ionical-covalently cross-linked polyaromatic membranes for SO2 electrolysis
Peach, Retha; Krieg, Henning M.; Krüger, Andries J.; Van der Westhuizen, Derik; Bessarabov, Dmitri (Elsevier, 2014)It has been shown that hydrogen, which can be used for energy storage, can be produced efficiently by the membrane based Hybrid Sulfur (HyS) process. During the HyS electrolysis step, SO2 and H2O are converted to H2 and ... -
Effect of H2S on SO2-depolarised water electrolysis
Krüger, Andries J.; Krieg, Henning M.; Bessarabov, Dmitri (Elsevier, 2015)The performance of a PEM SO2 electrolyser, used for the production of H2 gas and liquid H2SO4, was evaluated when the feed was contaminated with hydrogen sulfide. Transient voltage response at constant current density and ... -
Evaluation of covalently and ionically cross-linked PBI-excess blends for application in SO2 electrolysis
Krüger, Andries J.; Kerres, Jochen; Bessarabov, Dmitri; Krieg, Henning M. (Elsevier, 2015)Proton exchange membranes (PEM) containing various combinations of PPOBr (pol(2,6-dimethylbromide-1,4-phenylene oxide, covalently cross-linked) or PWN (poly(tetrafluorostyrene-4-phosphonic acid), ionically cross-linked) ... -
Evaluation of MEA manufacturing parameters using EIS for SO2 electrolysis
Krüger, Andries J.; Krieg, Henning M.; Van der Merwe, Jan; Bessarabov, Dmitri (Elsevier, 2014)Membrane electrode assembly (MEA) manufacturing parameters such as hot pressing pressure and pressing time were investigated for the use in a SO2 electrolyser. The SO2 electrolysis was optimised in terms of cell temperature, ... -
SO2 solubility in 50 wt % H2SO4 at elevated temperatures and pressures
Krüger, Andries J.; Krieg, Henning M.; Neomagus, Hein W.J.P. (ACS, 2014)The SO2 solubility at various temperatures and pressures was evaluated to determine the SO2 content in a 50 wt % H2SO4 acid solution adding new experimental solubility data for the SO2−H2SO4 binary system currently ... -
Stability of ionic-covalently cross-linked PBI-blended membranes for SO2 electrolysis at elevated temperatures
Peach, Retha; Krieg, Henning M.; Krüger, Andries J.; Bessarabov, Dmitri; Kerres, Jochen (Elsevier, 2020)In this study, the effect of component composition on the chemical stability of the developed ionic-covalently cross-linked PBI-blended membrane concept from earlier studies for application in SO2 electrolysis at elevated ...