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Terrence Mashego
Terrence Mashego

This progress report details the optimization of a constant feed control tank and commissioning work. The report was authored by Ramasita Linda, a chemical engineering student at Glencore, and was supervised by Mr. N Tshinyane. The abstract discusses developing catalyst formulations for diesel oxidation catalyst systems that can tolerate sulfur for oxidizing carbon monoxide and unburnt hydrocarbons from diesel engines. The report outlines testing catalytic activity and sulfur tolerance of different catalyst materials to help reduce vehicle emissions and meet government regulations.

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PROGRESS REPORT OPTIMIZATION OF CONSTANT FEED CONTROL TANK AND COMMISSIONING AUTHOR: NAME: Ramasita Linda STUDENT NUMBER: 201900866 EMAIL: Linda.ramasita@glencore.co.za CELL NUMBER 0730782567 SIGNATURE SUPERVISOR: NAME: Mr N Tshinyane EMAIL: Ntodeni.tshinyane@glencore.co.za TEL NUMBER: 014 536 0051 QUALIFICATION: B SIGNATURE: CHEMICAL ENGINEERING 21.03.2015
ABSTRACT In the near future the demand for diesel driven vehicles is projected to increase but a palladium-based diesel oxidation catalyst (DOC) cannot be applied due to its intolerance to sulphur. In this study, we will develop catalyst formulations that may be utilised in the DOC system and an emphasis will be placed on the catalytic activity with respect to its sulphur tolerance for coexisting oxidation of CO and the unburnt hydrocarbons (HC).Growing alarms on health effect and pressure to fulfil the governmental directives for the reduction of pollutants emissions from diesel engines are paving the way for the development of tailored treatment systems. These cannot be accomplished by engine modifications, fuel pre- treatments or simply better tuning of the combustion process; thus a convenient way of treating diesel and off-gases is needed. Automobile manufacturers scrambled to find an effective solution to rising air pollution levels and respond to demands by both consumers and governments are likely to lower air pollution and smog caused by automobile emissions.Precious metals are extensively used in automobile catalytic converters for pollution control. Evidence from preliminary studies showed that catalysts supported by TiO2 or Al2O3 presented greater potential for this application. For CO oxidation, the highest initial activity was exhibited by the Pt-only catalysts followed by the Pd-Pt alloys, and lastly the Pd-only formulations. This report outlines background of DOC, together with its preparation and activity testing that will be conducted at Mintek AMD laboratories. Shifts of light-off curves to higher temperatures will be studied. CO and HC conversion graphs will also be plotted to check the activity of each catalyst. The catalysts will also be tested for deactivation.

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  • 1. PROGRESS REPORT OPTIMIZATION OF CONSTANT FEED CONTROL TANK AND COMMISSIONING AUTHOR: NAME: Ramasita Linda STUDENT NUMBER: 201900866 EMAIL: Linda.ramasita@glencore.co.za CELL NUMBER 0730782567 SIGNATURE SUPERVISOR: NAME: Mr N Tshinyane EMAIL: Ntodeni.tshinyane@glencore.co.za TEL NUMBER: 014 536 0051 QUALIFICATION: B SIGNATURE: CHEMICAL ENGINEERING 21.03.2015
  • 2. ABSTRACT In the near future the demand for diesel driven vehicles is projected to increase but a palladium-based diesel oxidation catalyst (DOC) cannot be applied due to its intolerance to sulphur. In this study, we will develop catalyst formulations that may be utilised in the DOC system and an emphasis will be placed on the catalytic activity with respect to its sulphur tolerance for coexisting oxidation of CO and the unburnt hydrocarbons (HC).Growing alarms on health effect and pressure to fulfil the governmental directives for the reduction of pollutants emissions from diesel engines are paving the way for the development of tailored treatment systems. These cannot be accomplished by engine modifications, fuel pre- treatments or simply better tuning of the combustion process; thus a convenient way of treating diesel and off-gases is needed. Automobile manufacturers scrambled to find an effective solution to rising air pollution levels and respond to demands by both consumers and governments are likely to lower air pollution and smog caused by automobile emissions.Precious metals are extensively used in automobile catalytic converters for pollution control. Evidence from preliminary studies showed that catalysts supported by TiO2 or Al2O3 presented greater potential for this application. For CO oxidation, the highest initial activity was exhibited by the Pt-only catalysts followed by the Pd-Pt alloys, and lastly the Pd-only formulations. This report outlines background of DOC, together with its preparation and activity testing that will be conducted at Mintek AMD laboratories. Shifts of light-off curves to higher temperatures will be studied. CO and HC conversion graphs will also be plotted to check the activity of each catalyst. The catalysts will also be tested for deactivation.