Partial hydrogenation of methyl esters of sunflower oil catalyzed by highly active rhodium sulfonated triphenylphosphite complexes

Νικολάου, Νικόλαος; Papadopoulos, Christos E.; Lazaridou, Anastasia; Koutsoumba, Asimina; Bouriazos, Achilleas; Papadogianakis, Georgios

doi:10.1016/j.catcom.2008.10.026

Cited by 37 publications

(22 citation statements)

References 27 publications

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“…However, problems associated with the use of 1st generation biodiesel remain inter alia its low oxidative stability and low-temperature behaviour as well as its higher NO x emissions [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. Partial hydrogenation reactions of polyunsaturated FAME of vegetable oils to yield their monounsaturated (C18:1) counterparts [15,16,[53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][122][123][124][125][126][127][128][129][130][131] without increasing the content of the saturated part, i.e. methyl stearate (MS, Scheme 1) are useful reactions for upgrading 1st generation biodiesel [15,…”

Section: Partial Hydrogenation Reactions Of Renewable Polyunsaturatedmentioning

confidence: 99%

“…Catalytic partial hydrogenation processes of polyunsaturated methyl esters of vegetable oils into their monounsaturated C18:1 counterparts (Scheme 1) [15,16,[53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][122][123][124][125][126][127][128][129][130][131] are of great interest in the fields of production of high quality 1st generation biodiesel fuel [15,16,[53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69]…”

Section: Introductionmentioning

confidence: 99%

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Catalytic conversions in green aqueous media. Part 8: Partial and full hydrogenation of renewable methyl esters of vegetable oils

et al. 2015

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Section: Partial Hydrogenation Reactions Of Renewable Polyunsaturatedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic conversions in green aqueous media. Part 8: Partial and full hydrogenation of renewable methyl esters of vegetable oils

et al. 2015

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“…Hence, platinum also preferred as hydrogenation catalyst, such asPt-Zr 2 O, Pt-Ti 2 O and Pt-Al 2 O 3 [12] and Pt/C 5 % [14], [15]. The other noble metals used as hydrogenation catalyst were ruthenium (Ru/C [15], [16], Ru/MgO [16] and rhodium [rhodium triphenilphosphite sulphonat [17].…”

Section: Introductionmentioning

confidence: 99%

Low Temperature Catalytic-Transfer Hydrogenation of Candlenut Oil

Hadiah¹,

Soerawidjaja²,

Subagjo³

et al. 2017

International Journal on Advanced Science, Engineering and Information Technology

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Fatty acids containing more than one double bond (polyunsaturated fatty acids) indicated by high iodine value (more than 120 g I 2 /100 g oil) are prone either to oxidative degradation or thermal degradation leading to the appearance of undesirable compounds or to thermal oligo-/polymerization causing gum formation. Therefore, polyunsaturated bonds in the fatty acid chains should be hydrogenated into monounsaturated ones. The conventional method using hydrogen (direct hydrogenation) at relatively high temperature and pressure with the aid of nickel as a catalyst, which prone to explosion due to the presence of free gaseous hydrogen at high temperature and pressure. Catalytic transfer-hydrogenation (CTH) therefore is proposed as a promising alternative method, enabling CTH at room condition without the presence of free hydrogen. This research is focused on exploring effects of temperature and reaction time to iodine value reduction on CTH of candlenut oil, including the kinetics of its methyl ester. The hydrogenation utilizes Ag-Ni/silica 150 Å as catalyst and potassium formate (6M) as hydrogen donor. Three reaction temperatures were selected (40 o C, 60 o C, and 78 o C), where each reaction was performed for 4, 8, 12 and 16 hours. Hydrogenation was performed in a batch reactor using isopropyl alcohol as a solvent. Results showed that iodine values decreased with the increase of temperature and longer reaction time. The iodine value was still decreasing at 16 hours reaction time, indicating the possibility of longer reaction time. However, at 16 hours time, the iodine value yield has been within standard biodiesel range (Indonesian National Standard). The hydrogenation was first order reaction towards methyl ester double bonds concentration. K o and E for candlenut methyl ester were 163.15/hour and 25.26 kJ/mol.

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“…Polyunsaturated vegetable oils used as biolubricants and alternative fuel must be treated in order to improve their resistance to oxidation by partial hydrogenation [2,3].…”

Section: Introductionmentioning

confidence: 99%

Palladium catalyst on anodized aluminum monoliths for the partial hydrogenation of vegetable oil

Boldrini

Tonetto

et al. 2011

Chemical Engineering Journal

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Partial hydrogenation of methyl esters of sunflower oil catalyzed by highly active rhodium sulfonated triphenylphosphite complexes

Cited by 37 publications

References 27 publications

Catalytic conversions in green aqueous media. Part 8: Partial and full hydrogenation of renewable methyl esters of vegetable oils

Catalytic conversions in green aqueous media. Part 8: Partial and full hydrogenation of renewable methyl esters of vegetable oils

Low Temperature Catalytic-Transfer Hydrogenation of Candlenut Oil

Palladium catalyst on anodized aluminum monoliths for the partial hydrogenation of vegetable oil

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