Production of vegetable oil-based biofuels—Thermochemical behavior of fatty acid sodium salts during pyrolysis

Lappi, Hanna; Alén, Raimo

doi:10.1016/j.jaap.2009.07.005

Cited by 79 publications

(55 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Consequently, it can be supposed also that the pyrolysis of OA, either unsupported or supported on both catalysts will generate different families of products, both catalysts retaining more strongly some pyrolysis products when compared with pyrolysis without catalyst. One further point must be added: above 600 °C, no clear mass loss event is observed, justifying in part, together with literature data, 17 the choice of 650 °C as the final flash pyrolysis temperature used in the next section.…”

Section: Resultsmentioning

confidence: 99%

“…Cracking without a catalyst leads to a large family of deoxygenated liquid organic compounds, such as alkenes and alkanes, together with oxygenated compounds, such as carboxylic acids, ketones, aldehydes and alcohols. [14][15][16][17] When using catalysts, the degree of deoxygenation is generally enhanced. 18 In such cases, the C number in the products is not always lower than the C number of the original feed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flash Pyrolysis of Oleic Acid as a Model Compound Adsorbed on Supported Nickel Catalysts for Biofuel Production

Fréty¹,

Santos²,

Sales³

et al. 2014

Journal of the Brazilian Chemical Society

View full text Add to dashboard Cite

A pirólise rápida do ácido oleico foi estudada sobre catalisadores com 10% Ni suportados em sílica e alumina. Os catalisadores foram impregnados com 10% m/m de ácido oleico. Os precursores secos e os catalisadores contendo ácido oleico foram caracterizados por análise termogravimétrica. Os catalisadores calcinados foram analisados por difração de raios X (XRD) e redução à temperatura programada (TPR). As amostras com ácido oleico adsorvido foram submetidos à pirólise rápida a 650 °C. A pirólise de ácido oleico puro levou a 10% de conversão, enquanto a pirólise catalítica resultou em praticamente completa conversão. O catalisador NiO/alumina produziu mais hidrocarbonetos do que o NiO/sílica. Os principais produtos obtidos com NiO/sílica foram 1-alcenos, enquanto que os principais produtos obtidos com NiO/alumina foram isômeros de alcenos e aromáticos, e pequenas quantidades de compostos oxigenados, principalmente álcoois. A pirólise rápida de ácido oleico adsorvido em catalisadoras representa um método útil para distinguir as propriedades dos catalisadores e suas diferentes atividades.Flash pyrolysis of oleic acid was studied over 10 wt.% nickel catalysts supported on silica and alumina. The catalysts were impregnated with 10 wt.% oleic acid. The dried precursors and the catalysts containing oleic acid were characterized by thermogravimetric analysis. The calcined catalysts were analyzed by X-ray diffraction (XRD) and temperature programmed reduction (TPR). Samples containing adsorbed oleic acid were submitted to flash pyrolysis up to 650 °C. Whereas pyrolysis of oleic acid without catalyst converted only about 10%, the pyrolysis of oleic acid adsorbed on catalysts allowed practically a complete conversion. NiO/alumina yielded a higher amount of liquid hydrocarbons than NiO/silica. The main products obtained with NiO/silica were 1-alkenes, whereas the main products obtained with NiO/alumina were alkene isomers and aromatics. Small amounts of oxygenated compounds were also observed, principally alcohols. The flash pyrolysis of oleic acid adsorbed on different catalyst surfaces appears as a useful way to distinguish activity trends of different catalyst samples.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flash Pyrolysis of Oleic Acid as a Model Compound Adsorbed on Supported Nickel Catalysts for Biofuel Production

Fréty¹,

Santos²,

Sales³

et al. 2014

Journal of the Brazilian Chemical Society

View full text Add to dashboard Cite

show abstract

“…The governing idea has been to produce pyrolytically hydrocarbon-rich mixtures resembling petroleum. In our earlier investigations, the thermochemical behaviour of common fatty acid (C 18 , C 18:1 , and C 18:2 ) sodium salts [11], vegetable oil (palm, olive, rapeseed and castor oils) soaps [12], and CTO soap [13] was clarified under pyrolytic conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Our tentative findings [13] indicated that due to the remarkable formation of complicated aromatics, resin acids would have, for example, a negative effect on the quality of the product during production of diesel-type biofuels. This study was based on earlier findings [11] that, when pyrolysing soaps (i.e., as sodium salts of acids) instead of using free acids as feedstocks, pyrolysis can be controlled more readily. This also means that, for example, in the case of tall oil-based feedstocks, pyrolysis can be applied directly to tall oil soap and no external sulphuric acid is needed for acidulation.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Tall Oil-Derived Fatty and Resin Acid Mixtures

Lappi¹,

Alén

2012

ISRN Renewable Energy

Self Cite

View full text Add to dashboard Cite

Neutralised mixtures of tall oil-derived fatty acids and resin acids were separately pyrolysed (at 750• C for 20 s) by pyrolysis gas chromatography with mass-selective and flame ionisation detection (Py-GC/MSD/FID) to clarify their thermochemical behaviour. The pyrolysate of fatty acid salts characteristically contained high amounts of unsaturated aliphatic hydrocarbons and minor amounts of monoaromatics, whereas the pyrolysis of resin acid salts mainly resulted in the formation of aromatics with up to three benzene rings and only in very low amounts of aliphatic hydrocarbons. The data obtained are useful when considering the suitability of various tall oil products containing fatty and resin acid fractions for the production of biofuels and chemicals via pyrolysis.

show abstract

“…More recently online or 'flash' pyrolysis has been used for fatty acids and related compounds to study the formation of potential fuels and chemicals (Lima et al 2004, Maher and Bressler 2007, Prado and Antoniosi Filho 2009. Previously, studies reported the flash pyrolysis of fatty acid sodium salts (Lappi and Alen 2009) and carboxylic acids (Maher et al 2008) suggest mechanisms such as decarboxylation, decarbonylation, and dehydration for the formation of different organic compounds (Lappi andAlen 2009, Frety et al 2014). Yet, despite much work done on flash pyrolysis of carboxylic acids, the compounds evolved after the adsorption of fatty acids on clay minerals remains poorly understood although a recent study by Zafar et al, (2017) studied this process on calcite.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Adsorption of tetradecanoic acid on kaolinite minerals: Using flash pyrolysis to characterise the catalytic efficiency of clay mineral adsorbed fatty acids

Zafar

Watson

2017

Chemical Geology

View full text Add to dashboard Cite

Production of vegetable oil-based biofuels—Thermochemical behavior of fatty acid sodium salts during pyrolysis

Cited by 79 publications

References 27 publications

Flash Pyrolysis of Oleic Acid as a Model Compound Adsorbed on Supported Nickel Catalysts for Biofuel Production

Flash Pyrolysis of Oleic Acid as a Model Compound Adsorbed on Supported Nickel Catalysts for Biofuel Production

Pyrolysis of Tall Oil-Derived Fatty and Resin Acid Mixtures

Adsorption of tetradecanoic acid on kaolinite minerals: Using flash pyrolysis to characterise the catalytic efficiency of clay mineral adsorbed fatty acids

Contact Info

Product

Resources

About