Browsing Faculty of Engineering by Author "Chiuta, Steven"
Now showing items 1-9 of 9
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Experimental performance evaluation of an ammonia-fuelled microchannel reformer for hydrogen generation
Chiuta, Steven; Everson, Raymond C.; Neomagus, Hein W.J.P.; Bessarabov, Dmitri G. (Elsevier, 2014)Microchannel reactors appear attractive as integral parts of fuel processors to generate hydrogen (H2) for portable and distributed fuel cell applications. The work described in this paper evaluates, characterizes, and ... -
Experimentation and CFD modelling of a microchannel reactor for carbon dioxide methanation
Engelbrecht, Nicolaas; Chiuta, Steven; Everson, Raymond C.; Neomagus, Hein W.J.P.; Bessarabov, Dmitri G. (Elsevier, 2017)The methanation of carbon dioxide (CO2) via the Sabatier process is increasingly gaining interest for power-to-gas application. In this investigation, a microchannel reactor was evaluated for CO2 methanation at different ... -
Hydrogen production from ammonia decomposition over a commercial Ru/Al2O3 catalyst in a microchannel reactor: experimental validation and CFD simulation
Chiuta, Steven; Everson, Raymond C.; Neomagus, Hein W.J.P.; Bessarabov, Dmitri G. (Elsevier, 2016)In this work, an integrated experimental and CFD modelling technique was used to evaluate a microchannel reactor producing hydrogen from ammonia decomposition using a commercial Ru/Al2O3 catalyst. The microchannel reactor ... -
HySA infrastructure center of competence: a strategic collaboration platform for renewable hydrogen production and storage for fuel cell telecom applications
Bessarabov, Dmitri; Human, Gerhard; Chiuta, Steven; Van Niekerk, Frik; De Beer, Deon; Malan, Hannes; Grobler, L.J. (IEEE, 2014)The Department of Science and Technology of South Africa developed the National Hydrogen and Fuel Cells Technologies (HFCT) Research, Development and Innovation Strategy. The National Strategy was branded Hydrogen South ... -
A modelling evaluation of an ammonia-fuelled microchannel reformer for hydrogen generation
Chiuta, Steven; Everson, Raymond C.; Neomagus, Hein W.J.P.; Bessarabov, Dmitri G.; Le Grange, Louis A. (Elsevier, 2014)Hydrogen production from an ammonia-fuelled microchannel reactor is simulated in a three-dimensional (3D) model implemented via Comsol Multiphysics™. The work described in this paper endeavours to obtain a mathematical ... -
Performance evaluation of a high-throughput microchannel reactor for ammonia decomposition over a commercial Ru-based catalyst
Chiuta, Steven; Everson, Raymond C.; Neomagus, Hein W.J.P.; Bessarabov, Dmitri G. (Elsevier, 2015)In this work, the prospect of producing hydrogen (H2) via ammonia (NH3) decomposition was evaluated in an experimental stand-alone microchannel reactor wash-coated with a commercial Ruthenium-based catalyst. The reactor ... -
A performance evaluation of a microchannel reactor for the production of hydrogen from formic acid for electrochemical energy applications
Ndlovu, Isabella M.; Everson, Raymond C.; Chiuta, Steven; Neomagus, Hein W.J.P.; Engelbrecht, Nicolaas; Bessarabov, Dmitri G. (ESG, 2018)An experimen tal evaluation of a microchannel reactor was completed to assess the reactor performance for the catalytic decomposition of vaporised formic acid (FA) for H2 production. Initially, X-ray ... -
Reactor technology options for distributed hydrogen generation via ammonia decomposition: a review
Chiuta, Steven; Everson, Raymond C.; Neomagus, Hein W.J.P.; Van der Gryp, Percy; Bessarabov, Dmitri G. (Elsevier, 2013)Hydrogen (H2) fuel obtained via thermo-catalytic ammonia (NH3) decomposition is rapidly attracting considerable interest for portable and distributed power generation systems. Consequently, a variety of reactor technologies ... -
Techno-economic evaluation of a nuclear-assisted coal-to-liquid facility
Chiuta, Steven; Blom, Ennis (Elsevier, 2012)The production of synthetic fuels (synfuels) in Coal-to-Liquid (CTL) facilities has contributed to global warming due to the enormous carbon dioxide (CO2) emission footprint of the process. This corresponds to inefficient ...