Glucose–fructose isomerisation promoted by basic hybrid catalysts

Souza, Rodrigo Otavio Lopes de; Fabiano, Demian Patrick; Feche, C.; Rataboul, Franck; Cardoso, Dilson; Essayem, N.

doi:10.1016/j.cattod.2012.05.046

Cited by 67 publications

(66 citation statements)

References 13 publications

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“…Heterogeneous catalysts tested for the isomerisation of glucose into fructose are mostly basic solid materials such as hydrotalcites [28][29][30][31], alkaline-exchanged zeolites [28,30,32], anionexchanged resins [33], mesoporous ordered molecular sieves of the M41S family [34], magnesium oxide [35] and metallosilicate solid bases [36]. Temperatures below 120°C are usually used in order to avoid secondary transformations, and water is commonly selected as solvent.…”

Section: Introductionmentioning

confidence: 99%

Glucose isomerisation into fructose over magnesium-impregnated NaY zeolite catalysts

Graça

Iruretagoyena

Chadwick

2017

Applied Catalysis B: Environmental

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Section: Introductionmentioning

confidence: 99%

Glucose isomerisation into fructose over magnesium-impregnated NaY zeolite catalysts

Graça

Iruretagoyena

Chadwick

2017

Applied Catalysis B: Environmental

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“…A produção de biocombustíveis é crescente desde a década passada no país, tanto o etanol como biodiesel. Neste cenário, portanto, a biomassa se torna um componente chave para a geração de produtos sustentáveis, sejam estes combustíveis de segunda geração ou potenciais monômeros como o HMF (hidroximetil furfural) (RODRIGUES, 2011;SOUZA et al, 2012).…”

Section: Introductionunclassified

“…Sendo a celulose um dos principais componentes, sendo possível a sua hidrólise para a obtenção da glicose. Esta, por sua vez, consiste no ponto inicial para a obtenção de diversos produtos como o etanol, HMF, acido levulínico, dentre outros (LANZIANO, 2014;SOUZA et al, 2012).…”

Section: Introductionunclassified

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Estudo Da Conversão Catalítica De Glicose Em Catalisador Heterogêneo De Titânia Nano-Anatásio

Nogueira¹,

Lanziano²,

Guirardello³

et al. 2015

Anais Do Congresso Brasileiro De Engenharia Química Em Iniciação Científica - Cobeq IC 2015

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RESUMO -O crescente interesse pelo beneficiamento da biomassa tornou-se tanto de caráter científico quanto econômico. Originando-se da hidrólise celulósica, a glicose se mostra uma matéria prima abundante, podendo originar uma gama de produtos de alto interesse econômico, dentre eles a frutose e o HMF. Um meio para isto é através da catálise heterogênea com óxidos como titânia, zircônia e alumina. O uso de titânia com conformação em fase anatásio mostrou bons resultados em termos de conversão e seletividade. Para tanto foi testado o desempenho da titânia nano-anatásio na conversão de glicose, realizando posteriormente um ajuste numérico para estimativa de parâmetros no modelo cinético de reações proposto.

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“…[13,[22][23][24] Hence, zeolite Na-Y (2.6) was also tested in the current two-step xylose isomerization protocol. As expected, the alkaline catalyst wasf ound to isomerize xylose to some degree, but was incapable of catalyzing the etherification of xylose to form methyl xyluloside.…”

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confidence: 99%

Xylose Isomerization with Zeolites in a Two‐Step Alcohol–Water Process

et al. 2015

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Isomerization of xylose to xylulose was efficiently catalyzed by large-pore zeolites in a two-step methanol-water process that enhanced the product yield significantly. The reaction pathway involves xylose isomerization to xylulose, which, in part, subsequently reacts with methanol to form methyl xyluloside (step 1) followed by hydrolysis after water addition to form additional xylulose (step 2). NMR spectroscopy studies performed with (13) C-labeled xylose confirmed the proposed reaction pathway. The most active catalyst examined was zeolite Y, which proved more active than zeolite beta, ZSM-5, and mordenite. The yield of xylulose obtained over H-USY (Si/Al=6) after 1 h of reaction at 100 °C was 39%. After water hydrolysis in the second reaction step, the yield increased to 47%. Results obtained from pyridine adsorption studies confirm that H-USY (6) is a catalyst that combines Brønsted and Lewis acid sites, and isomerizes xylose in alcohol media to form xylulose at low temperature. The applied zeolites are commercially available; do not contain any auxiliary tetravalent metals, for example, tin, titanium, or zirconium; isomerize xylose efficiently; are easy to regenerate; and are prone to recycling.

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Glucose–fructose isomerisation promoted by basic hybrid catalysts

Cited by 67 publications

References 13 publications

Glucose isomerisation into fructose over magnesium-impregnated NaY zeolite catalysts

Glucose isomerisation into fructose over magnesium-impregnated NaY zeolite catalysts

Estudo Da Conversão Catalítica De Glicose Em Catalisador Heterogêneo De Titânia Nano-Anatásio

Xylose Isomerization with Zeolites in a Two‐Step Alcohol–Water Process

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