Zobrazeno 1 - 10
of 254
pro vyhledávání: '"Skala Dejan"'
Publikováno v:
Hemijska Industrija, Vol 78, Iss 3, Pp 187-203 (2024)
In the group of multiphase contactors and reactors, an important place belongs to reciprocat-ing plate columns (RPCs), which consist of a set of perforated plates fixed on a carrier (the so-called reciprocating or vibrating agitator) moving periodica
Externí odkaz:
https://doaj.org/article/44fa5fb87dea448ab74415a52e773885
Publikováno v:
Hemijska Industrija, Vol 77, Iss 1, Pp 69-84 (2023)
Synthesis of biodiesel from various plant oils is realized by the transesterification of triglycerides with methanol or by a reaction usually defined as methanolysis. The usage of low-quality oils, such as waste cooking oil (WCO), is followed by unde
Externí odkaz:
https://doaj.org/article/0b405256911848abbe5c01f6d2369694
Publikováno v:
Chemical Industry and Chemical Engineering Quarterly, Vol 26, Iss 2, Pp 171-182 (2020)
Supercritical CO2 extraction was applied on fenugreek (Trigonella foenum-graecum L., Fabaceae) seeds with the aim to define optimal process conditions to obtain the maximal extract yields content of steroidal sapogenins. Central composite rotatable d
Externí odkaz:
https://doaj.org/article/fdd4fa4b98f64a65a7c26179ad5bd74c
Publikováno v:
Journal of the Serbian Chemical Society, Vol 83, Iss 3, Pp 345-365 (2018)
The MnCO3/Na silicate (Mn/Na/Si mole ratio of 4.65:1:1.65) catalyst in the form of solid particles with diameter of 0.99–1.99 mm was used as a catalyst for transesterification of soybean oil in batch autoclave at different conditions: 388–468 K,
Externí odkaz:
https://doaj.org/article/e5ce86e32e3541cabc13d62ef19049ab
Publikováno v:
Chemical Industry and Chemical Engineering Quarterly, Vol 24, Iss 1, Pp 9-22 (2018)
The manganese carbonate catalyst, prepared by precipitation method, was used in transesterification of soybean oil under subcritical condition of methanol. Catalyst samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT
Externí odkaz:
https://doaj.org/article/0cb9478a7fe343f6a5b5859f006d7b1e
Publikováno v:
Chemical Industry and Chemical Engineering Quarterly, Vol 22, Iss 4, Pp 431-443 (2016)
In this study, mixed system containing manganese carbonate (MnCO3) and zinc glycerolate (ZnGly) was synthesized, and tested as solid catalyst for transesterification of soybean oil and biodiesel production. The samples of MnCO3/ZnGly before and af
Externí odkaz:
https://doaj.org/article/4f8a268d31614dc1ab34b33e96da2f3e
Publikováno v:
Chemical Industry and Chemical Engineering Quarterly, Vol 22, Iss 4, Pp 419-429 (2016)
Currently, the catalytic efficiency and reusability of the solid base catalysts cannot meet the demand of industrial biodiesel production under low temperature. The purpose of this study is to define the kinetics of heterogeneous transesterificati
Externí odkaz:
https://doaj.org/article/8e2ff735be294b93b07f129aa616d8a2
Further study on kinetic modeling of sunflower oil methanolysis catalyzed by calcium-based catalysts
Autor:
Miladinović Marija R., Tasić Marija B., Stamenković Olivera S., Veljković Vlada B., Skala Dejan U.
Publikováno v:
Chemical Industry and Chemical Engineering Quarterly, Vol 22, Iss 2, Pp 137-144 (2016)
The kinetic model, which was originally developed for sunflower oil methanolysis catalyzed by CaO.ZnO, was examined for several other calcium-based catalysts like neat CaO, quicklime and Ca(OH)2. This model including triacylglycerols mass transfer
Externí odkaz:
https://doaj.org/article/619fc1ec10a74b37a5616a5783bd2eb6
Publikováno v:
Chemical Industry and Chemical Engineering Quarterly, Vol 22, Iss 4, Pp 391-408 (2016)
Vegetable oils are mainly esters of fatty acids and glycerol, which can be converted to fatty acid methyl esters (FAME), also known as biodiesel, by the transesterification reaction with methanol. In order to attain environmental benignity, a larg
Externí odkaz:
https://doaj.org/article/acc1190c1b204534b0a09fe1e02961f9
Publikováno v:
Chemical Industry and Chemical Engineering Quarterly, Vol 21, Iss 1-1, Pp 1-12 (2015)
The goal of this study was to prepare CaO.ZnO catalyst which contain small amount of K2CO3 and analyze its activity for biodiesel synthesis. Catalyst was prepared using the following procedure: CaO and ZnO (molar ratio of 1:2), water and K2CO3 (in
Externí odkaz:
https://doaj.org/article/6be80af35b4941c7853b2d1f12325dbb