Author:Maharajh, Dheepak M; Lalloo, RajeshDate:Nov 2008The environmental effects of burning fossil fuels and the increased crude oil prices have triggered increased interest in biofuels. Biodiesel is traditionally produced from oil seed crops, which have lower yields per land area and threaten ...Read more
Author:Stafford, William HL; Brent, ADate:Nov 2010The global bioenergy industry is advancing rapidly. New technologies and potential feedstocks are being proposed that aim for bioenergy to contribute to a wider range of economic, social, and environmental objectives. However, these advancements ...Read more
Author:Billingham, P.ADate:1977It has become fashionable to talk of 'energy crisis' but in fact there is still no shortage of energy - if one is prepared to pay the price. This situation, however, cannot continue indefinitely because our limited supplies coal and oil are ...Read more
Author:Cawood, WNDate:1976Since primitive man first set fire to a heap of twigs to warm his cave, mankind has been making use of the earth's energy resources. Fortunately, we still have the sun, which offers us an inexhaustible source of non-polluting energy.Read more
Author:Luo, H; Mathe, Mahlanyane KDate:31 Aug 2010Energy is one of the most important factors that will influence the shape of society in the 21st century. Fuel cells are electrochemical energy converters, transforming chemical energy directly into electricity. Fuel cells are the main zero ...Read more
Author:Fourie, CJS; Du Plessis, SJ; Henry, GDate:Nov 2008The Waterberg Coalfield in the Limpopo Province of South Africa contains vast resources of coal that will ensure the country's energy security well into the future. The coalfield is situated in the Karoo-age Ellisras Basin and at present hosts ...Read more
Author:Chidembo, AT; Ozoemena, KI; Agboola, BO; Gupta, V; Wildgoose, GG; Compton, RGDate:Nov 2010The supercapacitive properties of nickel(II) tetraaminophthalocyanine(NiTAPc)/multi-walled carbon nanotube(MWCNT) nanocomposite films have been interrogated for the first time and found to possess a maximum specific capacitance of 981 ± 57 F ...Read more
Author:Bergh, JJ; Cronje, IJ; Dekker, J; Dekker, TG; Gerritsma, LM; Mienie, LJDate:Jan 1997The composition and toxicity of the aqueous oxidation fraction of coal were investigated, to gain information concerning process safety measures and the utilization of the oxidation products as antibacterial agents. Coal was oxidized with ...Read more
Author:Szewczuk, S; Roux, SP; Lindeque, M; Germanis, JDate:01 Sep 2010Municipal waste water, or sewage, is a combination of domestic and industrial effluent. The increasing volume of sewage due to urbanisation and economic growth places pressure on the treatment performance of existing waste treatment systems. ...Read more
Author:Stamp, J; Majozi, TDate:2011Heat integration to minimise energy usage in multipurpose batch plants has been in published literature for more than two decades. In most present methods, time is fixed a priori through a known schedule, which leads to suboptimal results. ...Read more
Author:Mathekga, HI; Oboirien, BO; Engelbrecht, A; North, Brian C; Premlal, KDate:Jul 2016In this study, the experimental results of the oxy-fluidized combustion of three different South African coals (sub-bituminous) are presented. The coal samples were denoted Coal A, B, and C. Three combustion atmospheres—air, oxy (21% O(sub2)/79% ...Read more
Author:Mongwaketsi, N; Sparrow, R; Klumperman, B; Maaza, MDate:Jan 2010Understanding growth mechanism of porphyrins nanorods by self assembly and molecular recognition is essential for their successful implementation in nanodevices. Optical spectroscopy and FTIR were used to investigate growth mechanism immediatelay ...Read more
Author:Klein, Peter; Surridge, K; Wolf, MDate:Jun 2018Solar thermal technologies present an opportunity to provide clean and renewable thermal energy for process heating when the process temperature is below 400 oC. Project Solar PayBack has been initiated to increase the awareness around the ...Read more
Author:Smit, Jacoba E; Grobler, AF; Sparrow, RWDate:01 Sep 2010The most efficient light harvesting and energy transfer systems are found in nature as part of the photosynthesis process. By extracting these system fragments and maximising their organisational structure, researchers are developing similar ...Read more
Author:Bollig, C; Jacobs, Cobus; Esser, MJD; Bernhard, EH; Von Bergmann, HMDate:Jun 2010An end-pumped Nd:YLF laser was demonstrated, which delivered 60.3 W continuous-wave and more than 52 W Q-switched average power for all repetition rates from 5 to 30 kHz. To achieve this, an analytical solution to estimate and optimize the ...Read more
Author:Le Roux, Lukas JDate:2009The Department of Minerals and Energy (DME) piloted the top-down Basa njengo Magogo fire ignition method at Orange Farm during the winter in 2003. In total, 76% of households reported less smoke in the homes, while 67% reported less smoke in ...Read more
Author:Szewczuk, SDate:Mar 2010The Council for Scientific and Industrial Research (CSIR), the DoE and Eskom have jointly developed the South African Renewable Energy Resource Database. Since the wind resource database is not accurate enough the Global Environmental Facility ...Read more
Author:Kiarii, EM; Govender, Krishna; Ndungu, PG; Govender, PPDate:Jul 2017Silica has been used as support material with many photocatalytic materials. In this study, silica polymorphs on graphene and epoxy graphene were studied using Density Functional Theory (DFT) to determine the interfacial and optical properties ...Read more
Author:Szewczuk, SDate:Aug 2010Africa is intended to accelerate the investment in wind energy in South Africa. This is in line with government’s objectives of reducing green house gases and diversifying our energy supply and also developing human capacity to support the ...Read more