In:
Advances in Materials Science and Engineering, Wiley, Vol. 2018 ( 2018-12-30), p. 1-11
Abstract:
The aim of this work was to evaluate the performance of different extruded catalysts containing K 2 CO 3 as active phase and adding conveniently γ -Al 2 O 3 and/or sepiolite and magnetic particles on the biodiesel production from sunflower oil by the ethanolic route. Firstly, the content of the Fe 3 O 4 on the catalyst (0.1, 0.2, 0.3, and 0.4 g Fe 3 O 4 /g of K 2 CO 3 / γ -Al 2 O 3 ), after calcination step, was evaluated to verify the separation facility of the catalysts with magnetic properties from reactional medium, using an external magnetic field, at the end of biodiesel synthesis. After that, three different catalysts were considered for comparative purposes: (a) K 2 CO 3 / γ -Al 2 O 3 ; (b) K 2 CO 3 / γ -Al 2 O 3 /Fe 3 O 4 ; (c) K 2 CO 3 / γ -Al 2 O 3 /Sepiolite/Fe 3 O 4 and subsequently characterized by dynamometry, TGA, SEM, VSM, BET, and XRD to determine their mechanical, structural, magnetic, and textural properties. However, their catalytic activities were determined through biodiesel production that was carried out in a glass volumetric reactor during 4 h, under magnetic stirring with 5% wt. of the catalyst and oil : ethanol molar ratio (1 : 12) at 80°C reaction temperature. The best result, i.e., around 88% of biodiesel conversion, was obtained with catalyst K 2 CO 3 / γ -Al 2 O 3 /Sepiolite/Fe 3 O 4 which showed also satisfactory textural and mechanical strength properties comparatively with the other catalytic derivatives. In addition, no agglomeration of the particles was observed during the reaction, and the magnetic property of this catalytic system was satisfactory for adequate separation from reactional medium seeking further reuse. The attained results are attractive for possible implementation at industrial scale and can be considered to mitigate drawbacks which resulting by using of homogeneous catalysts in the conventional processes.
Type of Medium:
Online Resource
ISSN:
1687-8434
,
1687-8442
DOI:
10.1155/2018/3980967
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2501025-6
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