Kinetic study of furfural formation accompanying supercritical carbon dioxide extraction.

Sako, Takeshi; Taguchi, Tomoaki; Sugeta, Tsutomu; Nakazawa, Noriaki; Okubo, Teiji; Hiaki, Toshihiko; Sato, Masahito

doi:10.1252/jcej.25.372

Cited by 31 publications

(10 citation statements)

References 6 publications

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“…[31] Under these conditions, the selectivity in furfural does not exceed 70%, except in the case of its continuous extraction with supercritical CO 2 where the selectivity reaches 80%. [32] In the presence of the H-Mordenite with a Si/Al ratio of 11 as catalyst, a close parallelism is observed with the results obtained for the dehydration of fructose, except that toluene is the co-solvent instead of methyl isobutyl ketone. The transformation of xylose into furfural is easily achieved at 170 C with a selectivity as high as 90 to 95% as far as the conversion is kept at a low extent, 30 to 40%.…”

Section: Dehydration Of Fructose and Fructose-precursorssupporting

confidence: 77%

Microporous and Mesoporous Catalysts for the Transformation of Carbohydrates

Moreau

2006

Catalysts for Fine Chemical Synthesis

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Section: Dehydration Of Fructose and Fructose-precursorssupporting

confidence: 77%

Microporous and Mesoporous Catalysts for the Transformation of Carbohydrates

Moreau

2006

Catalysts for Fine Chemical Synthesis

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“…[15][16][17] Alternatives to organic solvents have been studied as well, such as supercritical carbon dioxide. 18 Recent work by Dumesic and co-workers 19,20 has shown viable promise in using a biphasic system. Dumesic and co-workers have demonstrated this concept with a variety of feedstocks, high feedstock concentration, and recycling of organic phase.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of furfural production by dehydration of xylose in a biphasic reactor with microwave heating

et al. 2010

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In this paper we report a kinetic model for the dehydration of xylose to furfural in a biphasic batch reactor with microwave heating. There are four key steps in our kinetic model: (1) xylose dehydration to form furfural; (2) furfural reaction to form degradation products; (3) furfural reaction with xylose to form degradation products, and (4) mass transfer of furfural from the aqueous phase into the organic phase (methyl isobutyl ketone -MIBK). This kinetic model was used to fit experimental data collected in this study. The apparent activation energy for xylose dehydration is higher than the apparent activation energy for the degradation reactions. The biphasic system does not alter the fundamental kinetics in the aqueous phase. The organic layer, which serves as "storage" for the extracted furfural, is crucial to maximize product yield. Microwave heating does not change the kinetics compared to heating by conventional means. We use our model to describe the optimal reaction conditions for furfural production. These conditions occur in a biphasic regime at higher temperatures (i.e. 170• C) and short reaction times.We estimate that at these conditions furfural yields in a biphasic system can reach 85%. At these same conditions in a monophase system furfural yields are only 30%.

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“…Authentic samples of D-xylose and furfural were used as standards, and calibration curves were used for quantification. With toluene as solvent, the furfural present in the organic phase was quantified with a Techcomp 7890II Gas chromatograph and a PEG-20M column [32] coupled with an FID detector. The carrier gas was nitrogen.…”

Section: Catalytic Activity Testsmentioning

confidence: 99%

Selective Preparation of Furfural from Xylose over Sulfonic Acid Functionalized Mesoporous Sba-15 Materials

Shi

et al. 2011

Energies

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Sulfonic acid functionalized mesoporous SBA-15 materials were prepared using the co-condensation and grafting methods, respectively, and their catalytic performance in the dehydration of xylose to furfural was examined. SBA-15-SO 3 H(C) prepared by the co-condensation method showed 92-95% xylose conversion and 74% furfural selectivity, and 68-70% furfural yield under the given reaction conditions. The deactivation and regeneration of the SBA-15-SO 3 H(C) catalyst for the dehydration of xylose was also investigated. The results indicate that the used and regeneration catalysts retained the SBA-15 mesoporous structure, and the S content of SBA-15-SO 3 H(C) almost did not change. The deactivation of the catalysts is proposed to be associated with the accumulation of byproducts, which is caused by the loss reaction of furfural. After regeneration by H 2 O 2 , the catalytic activity of the catalyst almost recovered.

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Kinetic study of furfural formation accompanying supercritical carbon dioxide extraction.

Cited by 31 publications

References 6 publications

Microporous and Mesoporous Catalysts for the Transformation of Carbohydrates

Microporous and Mesoporous Catalysts for the Transformation of Carbohydrates

Kinetics of furfural production by dehydration of xylose in a biphasic reactor with microwave heating

Selective Preparation of Furfural from Xylose over Sulfonic Acid Functionalized Mesoporous Sba-15 Materials

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