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Catalysts 2019, 9(3), 291; https://doi.org/10.3390/catal9030291

Catalytic Cracking of Biodiesel Waste Using Metal Supported SBA-15 Mesoporous Catalysts

1
Center of Excellence in Catalysis for Bioenergy and Renewable Chemicals (CBRC), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
2
Program of Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
3
Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand
*
Author to whom correspondence should be addressed.
Received: 11 February 2019 / Revised: 8 March 2019 / Accepted: 18 March 2019 / Published: 22 March 2019
(This article belongs to the Special Issue Catalytic Transformation of Glycerol)
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Abstract

Palladium (Pd) and aluminium (Al) supported on SBA-15 were prepared as catalysts for cracking biodiesel waste from biodiesel production. Mesoporous silica SBA-15 was first synthesized by a hydrothermal method and then loaded with Al or Pd particles were loaded using postsynthesis or aqueous wet impregnation methods, respectively. The physical properties of the catalysts were characterized by X-ray diffraction (XRD), nitrogen (N2) adsorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses. The catalytic cracking performance of biodiesel waste was evaluated at reaction temperatures above 400 °C under a N2 atmosphere in a batch reactor for 40 min in comparison with that for pure glycerol, where the conversion of biodiesel waste reached 86.8% with 10 wt% Pd-SBA-15 at 650 °C. The product types depended on whether the starting material was pure glycerol or biodiesel waste. The main gaseous products were carbon monoxide as synthesis gas, carbon dioxide, and 1,3-butadiene. Additionally, 2-cyclopenten-1-one and 2-propen-1-ol were major products in the liquid fraction, which can be used in pharmaceuticals and as a flame retardant, respectively. View Full-Text
Keywords: glycerol cracking; biodiesel waste; Al–SBA-15; Pd–SBA-15; mesoporous material glycerol cracking; biodiesel waste; Al–SBA-15; Pd–SBA-15; mesoporous material
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Jiraroj, D.; Tongtooltush, T.; Panpranot, J.; Praserthdam, P.; Tungasmita, D.N. Catalytic Cracking of Biodiesel Waste Using Metal Supported SBA-15 Mesoporous Catalysts. Catalysts 2019, 9, 291.

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