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Viéville, Corinne; Yoo, J. W.; Pelet, Sandrine; Mouloungui, Zéphirin

doi:10.1023/a:1019050205502

Cited by 185 publications

(79 citation statements)

References 2 publications

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“…74 A conversão, entretanto, não é muito alta, obtendose melhores rendimentos do carbonato de glicerina na presença de zeólita 13X como catalisador. Compostos organo-estanho também agem como catalisadores para a carboxilação do glicerol.…”

Section: Outras Transformações Do Glicerolunclassified

Gliceroquímica: novos produtos e processos a partir da glicerina de produção de biodiesel

Mota¹,

Silva²,

Gonçalves³

2009

Quím. Nova

189

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Recebido em 16/1/09; aceito em 11/3/09; publicado na web em 25/3/09 GLYCEROCHEMISTRY: NEW PRODUCTS AND PROCESSES FROM GLYCERIN OF BIODIESEL PRODUCTION. Glycerol is a byproduct of biodiesel production through transesterification of oils and fat. This article discusses the chemical transformation of glycerol in ethers, acetals and esters of high technological applications, especially in the fuel sector. Glycerol hydrogenolysis, dehydration to acrolein and oxidation are discussed as well, to show the potential use of glycerol for production of plastic monomers. Finally, the article shows other transformations, such as syn gas production, epichloridrin and glycerin carbonate.Keywords: glycerol; biodiesel; transesterification. biodiesel e mercado da GlicerinaO século XX pode ser caracterizado como o século do petróleo. A sociedade moderna acostumou-se a desfrutar do conforto oferecido por esta matéria-prima não renovável, na forma de combustíveis e produtos químicos de uso diário, como os plásticos. Derivados do petróleo, esta nova classe de materiais tem sido largamente utilizada desde meados do século passado, substituindo a madeira, os metais e até mesmo o concreto, dando início ao que chamamos de petroquímica. 1No entanto, o constante aumento da demanda por fontes de energia, as mudanças climáticas causadas pelo aquecimento da atmosfera e o esgotamento das reservas de petróleo de fácil extração, aliado a um desenvolvimento socioeconômico mais intenso, sobretudo nos países em desenvolvimento, têm incentivado a utilização de insumos renová-veis, que possam substituir, ao menos parcialmente, os combustíveis de origem fóssil como petróleo, carvão e gás natural. O limite ao uso dos combustíveis fósseis não vai se dar somente pelo esgotamento das reservas, mas também pela redução da capacidade ambiental do planeta de absorver os gases oriundos de sua combustão.O transporte é um dos maiores responsáveis pela emissão de poluentes atmosféricos, uma vez que depende da combustão de derivados do petróleo como gasolina e óleo diesel. De toda energia primária consumida no mundo em 1999, 43% veio do petróleo, e desta parcela, 58% destinou-se ao setor de transporte.2 Em 2003, cerca de 50% da energia consumida no país proveio de fontes fósseis, como óleo e seus derivados. O transporte foi a origem de praticamente metade desse total.As crescentes emissões de dióxido de carbono oriundas da queima de combustíveis fósseis estão alterando o clima global. Se nada for feito para conter o aquecimento da atmosfera, até o fim do século XXI teremos mudanças significativas no nível dos mares, que irá afetar toda a vida na Terra. Uma das alternativas mais prementes para minimizar este problema são os biocombustíveis. Por terem origem vegetal, eles contribuem para o ciclo do carbono na atmosfera e por isto são considerados renováveis, já que o CO 2 emitido durante a queima é reabsorvido pelas plantas que irão produzi-lo, causando um impacto muito menor no aquecimento do planeta, pois no balanço total diminuem as emissões de CO 2 . O Brasil é u...

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Section: Outras Transformações Do Glicerolunclassified

Gliceroquímica: novos produtos e processos a partir da glicerina de produção de biodiesel

Mota¹,

Silva²,

Gonçalves³

2009

Quím. Nova

189

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“…The glycerol-based route also avoids the carcinogenic intermediate propylene oxide [26]. Glycerol carbonate has also a large potential as a novel component of gas-separation membranes, solvent and biolubricant [28,29] …”

Section: Use Of Glycerol As a Platform For Green Chemicalsmentioning

confidence: 99%

Beyond biofuels: economic opportunities, recent advances and challenges in property modeling for vegetable oils

Santos

Gerbaud

Roux

2014

Green Processing and Synthesis

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Despite the greater attention given to biofuels application in the literature, there are many economic and environmental drivers to use vegetables oils (VOs) as a renewable feedstock for other applications. These drivers are discussed in the present work and the technological challenges imposed by this shift towards new VOs uses are also discussed. They are mainly associated to the reaction routes issues, the performance regarding enduser properties, experimental procedures and property prediction models. The need for more holistic approaches (life cycle analysis) is briefly discussed and the potential benefits arising from new computer-aided tools are highlighted as well.

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“…It is reported that tin catalysts such as dibutyltin(IV)oxide (Bu 2 SnO) in methanol [258] or di(nbutyl)tindimethoxide (n-Bu 2 Sn(OMe) 2 ) [259] can uptake CO 2 (>3.5 MPa) and promote the carboxylation of glycerol (Scheme 6.38). Zeolite 13X and highly basic resins also facilitated the carboxylation of glycerol in acetone under supercritical CO 2 (10 MPa, 313 K) [260]. In such reports, dehydrating agents such as 13X zeolite [258] or molecular sieves [259] were added to the reaction mixture to remove water formed in the reaction, which strongly influences the base catalytic activity and otherwise leads to deactivation.…”

Section: Synthesis Of Glycerol Carbonatementioning

confidence: 99%

Mechanistic Studies of Solid Acids and Base‐Catalyzed Clean Technologies

Takagaki

Nishimura

Ebitani

2013

Heterogeneous Catalysts for Clean Technology

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IntroductionThe importance of solid acid and base catalysts in clean technologies has been recognized for a long time, and many books and reviews have been published since the text by Tanabe [1]. Tanabe et al.[2] revised their book in 1989, reviewing the definition and classification of solid acids and bases, determination of acidic and basic properties, and catalysis for isomerization, acylation, hydration of alkenes, methanol conversion, dehydration, dehydrogenation, esterification, hydrolysis, hydrocraking (hydrogenolysis), and oxidation reactions. The development of solid acid catalysts has been surveyed in several reviews [3][4][5][6][7][8][9][10]. Catalysis by solid bases and the mechanism of base-catalyzed reactions such as isomerization of alkenes and alkynes, aldol addition and aldol condensation, Henry reaction (nitro-aldol reaction), Knoevenagel condensation, Michael addition, the Tishchenko reaction, alkylation reactions, and addition reactions such as addition of amines to epoxides, transfer hydrogenation (Meerwein-Ponndorf-Verley (MPV) reaction), esterification and transesterification, and liquid-phase oxidations including Baeyer-Villiger oxidation and alkene epoxidation have been recently emphasized by Ono and Hattori [11], encompassing many splendid reviews and papers [12][13][14][15][16][17][18][19][20].The first part of this chapter is intended to survey recent literature on new catalytic materials because the development of new types of metal oxides and layered-and carbon-based materials with different morphologies opens up novel acid-base catalysis that enables new type of clean reaction technologies. Mechanistic considerations of acid-and base-catalyzed reactions should result in new clean catalytic processes for Green and Sustainable Chemistry, for example, transformations of biorenewable feedstock into value-added chemicals and fuels [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. The latter part of this chapter, therefore, focuses on biomass conversion using solid acid and base catalysts, which covers recent developments on acid-base, one-pot reaction systems for carbon-carbon bond formations, and biomass conversion including synthesis of furfurals from sugars, biodiesel production, and glycerol utilization.

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Cited by 185 publications

References 2 publications

Gliceroquímica: novos produtos e processos a partir da glicerina de produção de biodiesel

Gliceroquímica: novos produtos e processos a partir da glicerina de produção de biodiesel

Beyond biofuels: economic opportunities, recent advances and challenges in property modeling for vegetable oils

Mechanistic Studies of Solid Acids and Base‐Catalyzed Clean Technologies

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