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You searched for +publisher:"Nelson Mandela Metropolitan University" +contributor:("Gouws, S Dr"). Showing records 1 – 2 of 2 total matches.

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Nelson Mandela Metropolitan University

1. Fibi, Pumza Oscarine. Development and validation of in-process control test kits for biodiesel production.

Degree: MTech, Faculty of Science, 2013, Nelson Mandela Metropolitan University

The production of biodiesel from vegetable oils is not a new technology; it has been around since the 1950’s and both the research in terms of the different feedstock that can be used and the production of biodiesel has since been gaining momentum as there needs to be a new, sustainable and domestic alternative to petroleum fuels. These petroleum fuels pose enormous threats to the environment and therefore need to be replaced as they are mostly contributing to climate change and global warming not to mention the frequent price hikes which are crippling the South African economy. Biodiesel production using vegetable oils seems to be and is the future and a law has recently been passed which sanctions the production of biofuel locally.[1] South African fuel producers will instigate obligatory blending of fossil fuel with biofuel as the country moves to encourage investment in its biofuels sector. The production of biodiesel locally and the blending of biodiesel with other petroleum products will reduce the country’s dependence on imported fuel. The already established petrochemical companies like BP, Sasol and Engine are therefore mandated to purchase these biofuels if and when the biofuels meet the required South African National Standard (SANS) 1935 requirements. This is then where the challenge comes as most of these growing biofuel companies cannot afford to purchase testing equipment.The growing companiesthen discover upon completion of the biofuel manufacturing process that their product does not meet the required standard specification. The failuretranslates to a financial loss as the final product can possibly not be reworked. The aim of the project is then to assist these companies who are manufacturing biofuel, by providing them with in-house biofuel process methods which will allow for early detection, should there be a need to redo a step in the process and not wait until the completion of the production process. These in-house process-testing methods will range from pH determination, titration tests which will determine the soap content and the percentage free fatty acid content, water determination, density and visual testing. It is not cost-effective for these biodiesel manufacturers to send their samples for outsource testing as evidently the results obtained would be out of specification hence the need to provide these biodiesel manufacturers with in-house analytical testing techniques that will aid in monitoring of the biodiesel production Advisors/Committee Members: Gouws, S Dr.

Subjects/Keywords: Biodiesel fuels  – South Africa; Biomass energy  – South Africa

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Fibi, P. O. (2013). Development and validation of in-process control test kits for biodiesel production. (Masters Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/d1012645

Chicago Manual of Style (16th Edition):

Fibi, Pumza Oscarine. “Development and validation of in-process control test kits for biodiesel production.” 2013. Masters Thesis, Nelson Mandela Metropolitan University. Accessed March 24, 2019. http://hdl.handle.net/10948/d1012645.

MLA Handbook (7th Edition):

Fibi, Pumza Oscarine. “Development and validation of in-process control test kits for biodiesel production.” 2013. Web. 24 Mar 2019.

Vancouver:

Fibi PO. Development and validation of in-process control test kits for biodiesel production. [Internet] [Masters thesis]. Nelson Mandela Metropolitan University; 2013. [cited 2019 Mar 24]. Available from: http://hdl.handle.net/10948/d1012645.

Council of Science Editors:

Fibi PO. Development and validation of in-process control test kits for biodiesel production. [Masters Thesis]. Nelson Mandela Metropolitan University; 2013. Available from: http://hdl.handle.net/10948/d1012645


Nelson Mandela Metropolitan University

2. Gojela, Ntombekaya. Hydrogen economy : MEA manufacturing for PEM electrolysers.

Degree: MTech, Faculty of Science, 2011, Nelson Mandela Metropolitan University

The electrolysis of water was evaluated as a potentially efficient, as a low cost means of hydrogen production. The theoretical energy, voltage, current, and energy efficiencies of water electrolysis were considered by using various catalyst materials used in the fabrication of membrane electrode assemblies used in low temperature water electrolysis systems. Traditionally, iridium based catalysts have shown to be the most suitable material for its use on electrocatalysis of water to form hydrogen. This study showed that a combination of various elements as a binary and or ternary mixture in the base catalyst that was applied to the anode and cathode by using the Adam’s method had shown to give comparatively good results to that of using iridium oxide on its own. These catalysts were characterized by cyclic voltammetry, at different temperatures (30 °C-80 °C) with a range of catalyst loading of 0.2-0.5 mg.cm-2 noble metals. The study showed that the Ir40Co40 mixture as an anode catalyst was found to show highest hydrogen efficiency of 73 percent with a relatively low over potential of 0.925V at higher temperature of 80 °C. The mixture also showed to give the best electrocatalytic activity with a low Tafel slope of 30.1mV.dec-1. Whereas the Ir50Pt50 showed a comparatively lower hydrogen efficiency of 65 percent with a lower over potential of 0.6V at 50 °C. Ternary mixed oxide of Ir20Ru40Co40 showed an even lower over potential of 0.5- 0.6V over a large range of temperatures with a low hydrogen efficiency of 44 percent but gave good electrocatalytic activity in terms of the Tafel slope analysis. On the other hand, mixtures with relatively cheaper material such as Nickel in binary mixture systems such as Pt50Ni50 as cathode catalyst was found to show promising performance of a relatively low over potential that was less than 1.4 V with a low hydrogen efficiency of 62.1 percent Ternary cathode catalyst materials such as Pt33Ni33Co33 exhibited good performance with higher hydrogen efficiency of 65.2 percent at lower over potential of 1.2 V and a higher Tafel slope of 133.9 mV.dec-1 at 80 0C Advisors/Committee Members: Gouws, S Dr, Ferg, E Dr.

Subjects/Keywords: Water  – Electrolysis; Hydrogen

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Gojela, N. (2011). Hydrogen economy : MEA manufacturing for PEM electrolysers. (Masters Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/1483

Chicago Manual of Style (16th Edition):

Gojela, Ntombekaya. “Hydrogen economy : MEA manufacturing for PEM electrolysers.” 2011. Masters Thesis, Nelson Mandela Metropolitan University. Accessed March 24, 2019. http://hdl.handle.net/10948/1483.

MLA Handbook (7th Edition):

Gojela, Ntombekaya. “Hydrogen economy : MEA manufacturing for PEM electrolysers.” 2011. Web. 24 Mar 2019.

Vancouver:

Gojela N. Hydrogen economy : MEA manufacturing for PEM electrolysers. [Internet] [Masters thesis]. Nelson Mandela Metropolitan University; 2011. [cited 2019 Mar 24]. Available from: http://hdl.handle.net/10948/1483.

Council of Science Editors:

Gojela N. Hydrogen economy : MEA manufacturing for PEM electrolysers. [Masters Thesis]. Nelson Mandela Metropolitan University; 2011. Available from: http://hdl.handle.net/10948/1483

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