Browsing Faculty of Engineering by Author "Bessarabov, D.G."
Now showing items 1-9 of 9
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CFD simulation and experimental study of a hydrogen leak in a semi-closed space with the purpose of risk mitigation
Malakhov, A.A.; Avdeenkov, A.V.; Du Toit, M.H.; Bessarabov, D.G. (Elsevier, 2020)Computational fluid dynamics (CFD) methods were used to analyze hydrogen leakage in a semi-closed ventilation facility. The goal of the research was to apply numerical simulations to verify hydrogen distribution in the ... -
Comparative study of anion exchange membranes for low-cost water electrolysis
Pushkareva, I.V.; Modisha, P.; Bessarabov, D.G.; Pushkarev, A.S.; Grigoriev, S.A. (Elsevier, 2020)Various anion-exchange membranes (AEMs) were studied in the electrolysis cell using the non-precious metal-based catalysts showing the good potential of selected AEMs in low-cost water electrolysis application. The 0.1–1 ... -
Current status, research trends, and challenges in water electrolysis science and technology
Grigoriev, S.A.; Bessarabov, D.G.; Fateev, V.N.; Millet, P. (Elsevier, 2020)Water electrolysis has various industrial applications. Over the past years, interest in water electrolysis technologies has increased largely due to the renaissance of the nuclear-hydrogen energy concept and also the ... -
Development of a low purity aluminum alloy (Al6082) anodization process and its application as a platinum-based catalyst in catalytic hydrogen combustion
Kozhukhova, A.E.; Du Preez, S.P.; Shuro, I.; Bessarabov, D.G. (Elsevier, 2020)In this study, we present a process to prepare a Pt/anodized aluminum oxide (AAO) catalyst for catalytic hydrogen combustion applications using low cost and low aluminum (Al) purity Al6082 alloy (97.5% Al) as the substrate. ... -
The effects of pore widening and calcination on anodized aluminum oxide prepared from Al6082
Kozhukhova, A.E.; Du Preez, S.P.; Bessarabov, D.G. (Elsevier, 2020)In this study, semi-organized anodized aluminum oxide (AAO) is prepared by two-step anodization in oxalic acid using a low-purity aluminum (Al) alloy (Al6082) as the source material. Obtaining ideally ordered AAO layers ... -
Iridium catalyst supported on conductive titanium oxides for polymer electrolyte membrane electrolysis
Pushkarev, A.S.; Du Preez, S.P.; Bessarabov, D.G.; Pushkareva, I.V.; Ivanova, N.A. (2019)The Ir-based Magneli phase titanium oxide supported catalyst is synthesized using the polyol approach. Its structure and activity in oxygen evolution reaction were evaluated by means of transmission electron microscopy, ... -
Modeling of bimetallic Pt-based electrocatalyst on extended-surface support for advanced hydrogen compression and separation
Tokarev, A.; Bessarabov, D.G. (Elsevier, 2014)Electrochemical hydrogen compression (EHC) process can be used to purify and separate hydrogen from its mixtures. In this regards question of carbon monoxide (CO) tolerance of electrocatalyst, used in such a process (e.g., ... -
Temperature profile mapping over a catalytic unit of a hydrogen passive autocatalytic recombiner: an experimental and computational fluid dynamics study
Malakhov, A.A.; Du Toit, M.H.; Du Preez, S.P.; Avdeenkov, A.V.; Bessarabov, D.G. (ACS, 2020)Passive autocatalytic recombiners (PARs) are used for the removal of accidentally released hydrogen inside confined spaces. The high catalyst surface temperature is an important safety issue to be considered in the use of ... -
Thermally stable Pt/Ti mesh catalyst for catalytic hydrogen combustion
Du Preez, S.P.; Sekoai, P.T.; Bessarabov, D.G.; Falch, A.; Jones, D.R. (Elsevier, 2020)In this study, platinum (Pt) supported on titanium (Ti) mesh catalysts for catalytic hydrogen combustion were prepared by depositing Pt as a thin-layer on metallic or calcined Ti mesh. The Pt thin-layer could be stabilized ...