Aleksandar Jovović
University of Belgrade
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Aleksandar Jovović.
Waste Management & Research | 2016
Marta Trninić; Aleksandar Jovović; D Dragoslava Stojiljkovic
Agricultural waste is one of the main renewable energy resources available, especially in an agricultural country such as Serbia. Pyrolysis has already been considered as an attractive alternative for disposal of agricultural waste, since the technique can convert this special biomass resource into granular charcoal, non-condensable gases and pyrolysis oils, which could furnish profitable energy and chemical products owing to their high calorific value. In this regard, the development of thermochemical processes requires a good understanding of pyrolysis mechanisms. Experimental and some literature data on the pyrolysis characteristics of corn cob and several other agricultural residues under inert atmosphere were structured and analysed in order to obtain conversion behaviour patterns of agricultural residues during pyrolysis within the temperature range from 300 °C to 1000 °C. Based on experimental and literature data analysis, empirical relationships were derived, including relations between the temperature of the process and yields of charcoal, tar and gas (CO2, CO, H2 and CH4). An analytical semi-empirical model was then used as a tool to analyse the general trends of biomass pyrolysis. Although this semi-empirical model needs further refinement before application to all types of biomass, its prediction capability was in good agreement with results obtained by the literature review. The compact representation could be used in other applications, to conveniently extrapolate and interpolate these results to other temperatures and biomass types.
international symposium on environmental friendly energies and applications | 2016
Marta Trninić; D Dragoslava Stojiljkovic; Aleksandar Jovović; Goran Jankes
The reduction of imported forms of energy, and the conservation of the limited supply of fossil fuels, depends up on the utilization of all other available fuel energy sources. Biomass is a renewable energy source and represents a valid alternative to fossil fuels. The abundance of biomass ranks it as the third energy resource after oil and coal. Moreover, when compared to fossil fuels, biomass fuels possess negligible sulphur concentrations, produce less ash, and generate far less emissions in to the air. In other words, biomass can deliver significant greenhouse gas reductions in electricity, heat and transport fuel supply. The energy in biomass may be realized by different thermochemical technologies of which gasification is most promising alternative routes to convert biomass to power/heat generation and production of transportation fuels and chemical feedstock. This paper deals with the state of the art biomass gasification technologies, evaluating advantages and disadvantages, the potential use of the syngas and the application of the biomass gasification. Also, this paper provides short overview of the current status of the biomass gasification in Serbia.
Archive | 2018
Marta Trninić; Dušan Todorović; Aleksandar Jovović; D Dragoslava Stojiljkovic; Øyvind Skreiberg; Liang Wang; Nebojša Manić
The paper presents a simple mathematical model for designing, optimizing and simulating small–medium CHP scale plant with use of biomass waste downdraft gasification. A downdraft gasifier has been used as the starting point in the study, due to its low tar content and effective way of using heat in the engine’s exhaust gases to dry and pyrolyze the different solid biomass waste. Hot water from the cooling circuit of the engine and from producer gas cooling is directly used for the district heating network, air or steam preheating. The mathematical model includes modelled components as a downdraft gasifier, an internal combustion engine using the characteristic equation approach method. The mathematical model enables the outputs of the plant to be evaluated and calculated for different types of biomass and operating conditions. The results demonstrate that it is a useful tool for assessing the performance of CHP plants using several types of biomass waste and enables comparisons to be made between operating conditions for real applications.
Waste Management & Research | 2016
Arne Ragossnig; Aleksandar Jovović
The goal of waste management, above all, is to contribute to a healthy and sustainable environment for our societies. In order to achieve this end, the focus of waste management needs to be put on preventing health hazards and pollution for humans and the environment, and only then waste can be considered as a resource. While this precondition is true for all societies, the focus of activities in waste management in various regions of the world nevertheless is different owing to the fact that the waste management sector is in diverse stages of development. If one tries to break down the life cycle of waste management, one could differentiate the following stages that must always be accomplished consecutively.
Waste Management & Research | 2016
Hristina Stevanovic-Carapina; Jelena Milic; Marijana Curcic; Jasminka Randjelovic; Katarina Krinulovic; Aleksandar Jovović; Zvonko Brnjas
Sustainable solid waste management needs more dedicated attention in respect of environmental and human health protection. Solid waste containing persistent organic pollutants is of special concern, since persistent organic pollutants are persistent, toxic and of high risk to human health and the environment. The objective of this investigation was to identify critical points in the Serbian system of solid waste and persistent organic pollutants management, to assure the life cycle management of persistent organic pollutants and products containing these chemicals, including prevention and final destruction. Data were collected from the Serbian competent authorities, and led us to identify preventive actions for solid waste management that should reduce or minimise release of persistent organic pollutants into the environment, and to propose actions necessary for persistent organic pollutants solid waste. The adverse impact of persistent organic pollutants is multidimensional. Owing to the lack of treatment or disposal plants for hazardous waste in Serbia, the only option at the moment to manage persistent organic pollutants waste is to keep it in temporary storage and when conditions are created (primarily financial), such waste should be exported for destruction in hazardous waste incinerators. Meanwhile, it needs to be assured that any persistent organic pollutants management activity does not negatively impact recycling flows or disturb progress towards a more circular economy in Serbia.
Fuel | 2012
Ehsan Houshfar; Øyvind Skreiberg; Dušan Todorović; Alexandra Skreiberg; Terese Løvås; Aleksandar Jovović; Lars Sørum
Applied Thermal Engineering | 2007
Dragan Tucakovic; Vladimir Stevanović; Titoslav Zivanovic; Aleksandar Jovović; Vladan B. Ivanović
Biomass & Bioenergy | 2012
Michael Becidan; Dušan Todorović; Øyvind Skreiberg; Roger A. Khalil; Rainer Backman; Franziska Goile; Alexandra Skreiberg; Aleksandar Jovović; Lars Sørum
Journal of Cleaner Production | 2016
Bojana Vukadinović; Ivanka G. Popović; Branko Dunjic; Aleksandar Jovović; Miloš Vlajić; Dejan Stanković; Zoran Bajić; Mirjana Lj. Kijevčanin
Powder Technology | 2014
Vladimir Stevanović; Miroslav Stanojević; Aleksandar Jovović; Dejan Radić; Milan M. Petrović; Nikola Karličić