2010
DOI: 10.1016/j.fuproc.2009.10.005
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Acetylation of glycerol to synthesize bioadditives over niobic acid supported tungstophosphoric acid catalysts

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Cited by 126 publications
(63 citation statements)
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“…Glycerol acetylation reaction was observed at temperature of 120°C with a molar ratio of glycerol to acetic acid 1:9 in free solvent conditions, in a glass vial equipped with a magnetic stirrer. To this mixture were added 5 wt% of catalyst of glycerol used [13]- [15]. After that, the vial was closed, immersed in an oil bath and the charged mixture was stirred for 1; 3; 5; and 7 hours.…”
Section: Catalytic Testmentioning
confidence: 99%
“…Glycerol acetylation reaction was observed at temperature of 120°C with a molar ratio of glycerol to acetic acid 1:9 in free solvent conditions, in a glass vial equipped with a magnetic stirrer. To this mixture were added 5 wt% of catalyst of glycerol used [13]- [15]. After that, the vial was closed, immersed in an oil bath and the charged mixture was stirred for 1; 3; 5; and 7 hours.…”
Section: Catalytic Testmentioning
confidence: 99%
“…Özellikle ürün seçicilikleri açısından yapılan araştırmalarda yakıt katkısı olarak kullanılabilen son ürün triasetine olan ilgi yoğundur. Ancak yapılan çalışmaların çoğunda reaksiyon sonucunda ürün karışımı elde edilmektedir [1,[13][14][15]. Oluşan ürünlerin kaynama noktalarının birbirilerine çok yakın olması ürün saflaştırma işlemlerini güçleştirmekte ve maliyeti arttırmaktadır.…”
Section: şEkil 1 Gliserinin Asetik Asitle Esterleşme Reaksiyonu (Estunclassified
“…51 ) e elevada solubilidade em meio polar, o HPA necessita de suportes que possuem alta estabilidade térmica e alta área superficial que possam torná-lo insolúvel em solventes polares e aumentar ainda mais sua atividade catalítica que é atribuída a forte adsorção dos prótons nos suportes. [73][74][75][76] A escolha do suporte deve ser feita de maneira criteriosa, pois é possível a ocorrência de substituição parcial dos prótons no HPA por diferentes cátions em catalisadores suportados, resultando em seus sais correspondentes os quais tendem a formar suspensões coloidais em meio polar, aumentando ainda mais as dificuldades na separação do catalisador. 53,76 Os catalisadores suportados em metais estão entre os materiais mais importantes na catálise heterogênea.…”
Section: Catalisadores áCidosunclassified