Author
Marija R. Miladinović
Other affiliations: University of Belgrade
Bio: Marija R. Miladinović is an academic researcher from University of Niš. The author has contributed to research in topics: Biodiesel & Biodiesel production. The author has an hindex of 10, co-authored 16 publications receiving 517 citations. Previous affiliations of Marija R. Miladinović include University of Belgrade.
Topics: Biodiesel, Biodiesel production, Catalysis, Sunflower oil, Chemistry
Papers
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TL;DR: In this paper, an overview of the recent progress in the development of various CaO-based catalysts suitable for biodiesel production is presented, where the mechanism, kinetics and optimization of transesterification reaction over these catalysts are first considered.
Abstract: The present paper is an overview of the recent progress in the development of various CaO-based catalysts suitable for biodiesel production. The mechanism, kinetics and optimization of transesterification reaction over these catalysts are first considered. Then, the practical application of CaO-based catalysts is discussed with a special stress on leaching and reusability of these catalysts. Also, various continuous reactor systems currently in use for biodiesel production are appraised. In addition to it, purification of crude biodiesel and the ecological aspects of using CaO-based catalysts are considered. Finally, the potentials of CaO-based catalysts for heterogeneous catalysis for biodiesel production are emphasized to assess the future perspectives of their use. This review might help in selecting suitable CaO-based catalysts and the optimum reaction conditions for biodiesel production.
265 citations
TL;DR: An overview of the preparation of nano-sized CaO-based catalysts and their application in the biodiesel production is given in this article, where the authors prove the promising potentiality of nano CaO−based catalyst as solid catalysts in biodiesel.
Abstract: Calcium oxide (CaO) itself, as cheap, highly active and easily available, is one of the most used solid catalysts for transesterification reaction of different oils and fats to biodiesel. A way to improve its catalytic activity is to increase its specific surface by preparing it in the nano–form. This paper gives an overview of the preparation of nano–sized CaO–based catalysts and their application in the biodiesel production. Various forms of nano–sized CaO–based catalysts have been employed in the biodiesel production like neat, doped and loaded CaO as well as waste material containing CaO. The modern technology based on the use of nano CaO–based catalysts aiming at high biodiesel yields will have further positive implications like simplicity, safety, economy and efficiency of biodiesel production. This overview proves the promising potentiality of nano CaO–based catalysts as solid catalysts in biodiesel production.
169 citations
TL;DR: In this article, the authors investigated the catalytic activity of the walnut shell ash in the biodiesel production by the sunflower oil methanolysis and found that it provided a very fast reaction and a high FAME content (over 98%).
68 citations
TL;DR: In this paper, the quicklime-catalyzed sunflower oil methanolysis was studied at mild reaction conditions and the optimal methanol-to-oil molar ratio and quicklime amount for achieving the highest fatty acid methyl esters content were established to be 12:1 and 5%, respectively.
Abstract: The quicklime-catalyzed sunflower oil methanolysis was studied at mild reaction conditions. Quicklime (calcined at 550 °C for 4 h) in amounts of 1.0, 2.5, 5.0 and 10.0% (based on the oil weight) and different molar ratios of methanol-to-oil (6:1, 12:1 and 18:1) were employed to investigate their influence on the methyl esters content and the kinetics of the methanolysis reaction. The optimal methanol-to-oil molar ratio and quicklime amount for achieving the highest fatty acid methyl esters content were established to be 12:1 and 5% (based on the oil weight), respectively. The sigmoidal kinetics of quicklime-catalyzed methanolysis reaction was described by a model which included the changing mechanism of the reaction and the triacylglycerols mass transfer limitation. The kinetic parameters were determined and correlated with the process variables. A good agreement between the kinetic model and the experimental data for all applied reaction conditions was observed.
43 citations
TL;DR: In this article, the effect of the residence time (i.e., liquid flow rate through the reactor), methanol-to-oil molar ratio and reaction temperature on the fatty acid methyl esters (FAMEs) content at the output of a continuous packed bed tubular reactor was modeled by the response surface methodology (RSM) combined with the 33 full factorial design (FFD) with replication or the Box-Behnken design (BBD) with five center points.
31 citations
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TL;DR: In this article, the authors reviewed the researches done on economics of biodiesel production, emphasizing on the methods of assessment and determination of total investment cost and operation cost, as well as on assessment of economically better technology, catalyst and feedstock alternatives.
335 citations
TL;DR: In this paper, an overview of the recent progress in the development of various CaO-based catalysts suitable for biodiesel production is presented, where the mechanism, kinetics and optimization of transesterification reaction over these catalysts are first considered.
Abstract: The present paper is an overview of the recent progress in the development of various CaO-based catalysts suitable for biodiesel production. The mechanism, kinetics and optimization of transesterification reaction over these catalysts are first considered. Then, the practical application of CaO-based catalysts is discussed with a special stress on leaching and reusability of these catalysts. Also, various continuous reactor systems currently in use for biodiesel production are appraised. In addition to it, purification of crude biodiesel and the ecological aspects of using CaO-based catalysts are considered. Finally, the potentials of CaO-based catalysts for heterogeneous catalysis for biodiesel production are emphasized to assess the future perspectives of their use. This review might help in selecting suitable CaO-based catalysts and the optimum reaction conditions for biodiesel production.
265 citations
TL;DR: The cultivation conditions for biomass growth and lipid productivity improvement, the available harvesting and lipid extraction technologies, as well as the key challenges and future prospect of microalgae biodiesel production are illustrated.
Abstract: Microalgae has been identified as a potential feedstock for biodiesel production since its cultivation requires less cropland compared to conventional oil crops and the high growth rate of microalgae. Research on microalgae oils often are focused on microalgae oil extraction and biomass harvesting techniques. However, energy intensive and costly lipid extraction methods are the major obstacles hampering microalgae biodiesel commercialisation. Direct biodiesel synthesis avoids such problems as it combines lipid extraction techniques and transesterification into a single step. In this review, the potential of direct biodiesel synthesis from microalgae biomass was comprehensively analysed. The various species of microalgae commonly used as biodiesel feedstock was critically assessed, particularly on high lipid content species. The production of microalgae biodiesel via direct conversion from biomass was systematically discussed, covering major enhancements such as heterogeneous catalysts, the use of ultrasonic and microwave- techniques and supercritical alcohols that focus on the overall improvement of biodiesel production. In addition, this review illustrates the cultivation conditions for biomass growth and lipid productivity improvement, the available harvesting and lipid extraction technologies, as well as the key challenges and future prospect of microalgae biodiesel production. This review serves as a basis for future research on direct biodiesel synthesis from modified microalgae biomass to improve profitability of microalgae biodiesel.
252 citations
TL;DR: The low cost and efficient CaO catalysts have been successfully prepared from chicken manure by a simple calcination, in this article, and the Hammett indicator test showed that the obtained CaO catalyst has the basic strength in a range of 15.
244 citations
TL;DR: The present work reviews the current biodiesel feedstock, catalysis, general and novel immobilizing materials, bioreactors, potential lipase resources, intensification technics, and process modelling for enzymatic transesterification.
241 citations