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Harro Von Blottnitz   Dr.  University Lecturer 
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Harro Von Blottnitz published an article in April 2012.
Top co-authors See all
Alan C. Brent

45 shared publications

University of Pretoria

Mary Ann Curran

36 shared publications

US Environmental Protection Agency

B. Amigun

13 shared publications

Harro von Blottnitz

8 shared publications

Department of Chemical Engineering; University of Cape Town; Rondebosch 7701; Cape Town; South Africa

Kyle Mason-Jones

5 shared publications

8
Publications
7
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15
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Publication Record
Distribution of Articles published per year 
(2009 - 2012)
Total number of journals
published in
 
5
 
Publications See all
Article 1 Read 0 Citations Thermodynamic and kinetic considerations for biodiesel production by reactive distillation Nicolas Mimi Eleftheriades, Harro von Blottnitz Published: 04 April 2012
Environmental Progress & Sustainable Energy, doi: 10.1002/ep.10621
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Reactive distillation (RD) methods have only lately been introduced into biodiesel (BD) production. They offer several advantages that could benefit the efficiency and drop production costs. A bench‐scale RD unit was built, and results obtained are interpreted from kinetic and thermodynamic perspectives. Analysis of samples taken from the prereactor and the reboiler product was achieved by a conversion‐viscosity chart developed that returned BD conversion from the measured viscosity. It was found that 50–60% conversion was possible at ambient temperatures, with stoichiometric feed ratio and a stirrer. Thermodynamically, Raoult's law was used to predict the vapor and liquid composition in the reboiler. Three different scenarios were set up with different feed molar ratios. It was found that despite the large difference in boiling point temperatures, separation of methanol from the reactant and products mix was limited. Under all modeled scenarios reported, an appreciable amount of methanol would be lost to the product stream. The affinity of the methanol to remain in solution was greater than expected, based on the boiling points, and only when appreciable amounts of methanol were in solution could larger amounts of methanol be removed. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 373‐376, 2013
BOOK-CHAPTER 1 Read 2 Citations Biofuel Policy in South Africa: A Critical Analysis Thapelo Letete, Harro Blottnitz, Harro von Blottnitz Published: 20 September 2011
Bioenergy for Sustainable Development in Africa, doi: 10.1007/978-94-007-2181-4_16
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In 2007 the South African government released the country’s National Biofuels Industrial Strategy targeting a biofuels market penetration of 2% of liquid road transport fuels by 2013. Contrary to the international situation, the main driver for the development of a biofuels industry in South Africa is neither the economic threat of increasing oil prices nor mitigation of greenhouse gas emissions, but the need to create a link between the country’s first and second economies. Specifically, the government hopes to stimulate economic development and to alleviate poverty through the promotion of farming in areas previously neglected by the apartheid system. Before the release of this strategy, commercial sugar producers and maize farmers represented the majority of the parties looking to drive the South African biofuels industry. But, 2 years after its release none of the ventures by these stakeholders have been able to take off, mainly due to the Strategy’s restrictions on the type and source of feedstock as well as on the type of farmers whose participation in the industry would be subsidised. This chapter presents a critical scientific-based analysis of the implications and results of South Africa’s National Biofuels Industrial Strategy. Firstly, an update is presented on the state of the biofuels industry in the country, highlighting the current production statistics and the major investment activities, and how these were affected by the release of the Strategy. Then the ambiguities in the Strategy are outlined and critically analysed with reference to the current state of the biofuels industry in the country. The chapter concludes with lessons leant from the South African experience by those African countries which are yet to develop their respective biofuel policies.
Article 1 Read 0 Citations Renewable energy for sustainable urban development: Redefining the concept of energisation Christian Nissing, Harro von Blottnitz Published: 01 May 2010
Energy Policy, doi: 10.1016/j.enpol.2009.12.004
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It is widely recognised that access to and supply of modern energy play a key role in poverty alleviation and sustainable development. The emerging concept of energisation seems to capture this idea; however, there is no unified definition at the point of writing. In this paper, the aim is to propose a new and comprehensive definition of the concept of energisation. The chronological development of this concept is investigated by means of a literature review, and a subsequent critique is offered of current definitions and usage of the concept. Building upon these first insights, two planned cases of energisation in post-apartheid South Africa are contrasted to an unplanned one: they are the national electrification programme, the integrated energy centres initiative, and a wood fuelled local economy in Khayelitsha, Cape Town's biggest township. Especially the latter case, based on original data collection by the authors, provides a new understanding of specific elements affecting energisation. Finally, a new and detailed definition of the concept of sustainable energisation is developed by systematically reiterating three key elements: the target group, the concept of energy services, and sustainable development.
Article 1 Read 1 Citation An economic model for energisation and its integration into the urban energy planning process Christian Nissing, Harro von Blottnitz Published: 01 May 2010
Energy Policy, doi: 10.1016/j.enpol.2009.12.025
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It is widely recognised that access to and supply of modern energy play a key role in poverty alleviation and sustainable development. The emerging concept of energisation seems to capture this idea, and if implemented in its full complexity it should have multiple beneficial effects. To demonstrate this, an economic model is developed for an urban developmental context, drawing on the theory of urban ecosystems and illustrating energy and waste production and consumption issues with current South African data sets. This new understanding of the concept of energisation is then integrated into a local government energy planning process, by means of a checklist for energy planners, covering 18 aspects that between them affect all 7 identifiable tiers of the energy service supply network. A 6-step structured approach is proposed for integrating sustainable energisation into the first four phases of the advanced local energy planning (ALEP) tool.
Article 2 Reads 3 Citations From life cycle talking to taking action José Potting, Mary Ann Curran, Harro Blottnitz, Harro von Bl... Published: 23 March 2010
The International Journal of Life Cycle Assessment, doi: 10.1007/s11367-010-0167-4
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The biannual Life Cycle Management conference series aims to create a platform for users and developers of Life Cycle Assessment (LCA) and related tools to share their experiences. A key concern of the LCM community has been to move beyond the production of LCA reports toward using the developed knowledge. This paper reports and evaluates some of the main outcomes of the 4th International Life Cycle Management Conference (LCM 2009).
Article 1 Read 2 Citations Flows and fates of nickel–cadmium batteries in the City of Cape Town Kyle Mason-Jones, Harro von Blottnitz Published: 01 February 2010
Minerals Engineering, doi: 10.1016/j.mineng.2009.09.010
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The use and disposal of nickel–cadmium secondary cells (the basic components of NiCd batteries) in Cape Town, South Africa, has been investigated with the objective of quantifying the associated flows of cadmium. Small sealed cells were found to make the dominant contribution to overall cadmium flows, with cordless power tools and separately imported cells accounting for most of these. Essentially all of these cells either have or will enter the general waste streams of the city. Large industrial cells made a smaller but significant contribution to overall flows, but none were known to have entered the general waste stream. These went primarily to hazardous waste disposal outside the city or recycling abroad, with some going into storage. The results suggested that the city’s landfill stocks of cadmium are considerable, and that these could continue to grow in the future.