Catalytic conversion of hemicellulosic biomass to lactic acid in pH neutral aqueous phase media

Yang, Lisha; Su, Junfeng; Carl, Sarah; Lynam, Joan G.; Yang, Xiaokun; Lin, Hongfei

doi:10.1016/j.apcatb.2014.06.025

Cited by 131 publications

(91 citation statements)

References 51 publications

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“…However, with further raising reaction temperature to 220 °C, the yield of both xylose and lactic acid decreased to 1.2 wt% and 14.5 wt%, respectively; while the yield of furfural significantly increased from 0.6 to 21.0 wt%. This was attributed to the dehydration of xylose to furfural at high temperatures under BrØnsted acidic ambiance, and the further decomposition of lactic acid to smaller molecular acids (like FA and AA)30.…”

Section: Resultsmentioning

confidence: 99%

“…Then, the xylose is further converted to glycolaldehyde and glyceraldehyde via a retro-aldol condensation reaction. Consequently, lactic acid is produced304547. In this reaction pathway, the theoretical yield of lactic acid based on xylose can be calculated as 60 wt%.…”

Section: Resultsmentioning

confidence: 99%

“…Reported that xylose and xylan could be used as resources to produce lactic acid by the catalysis of ZrO 2 . However, the highest yield of lactic acid was only 42 mol% from xylose30. Actually, the hemicellulose via pretreatment process is a potential material to produce chemicals3132333435.…”

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confidence: 99%

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Fractionation for further conversion: from raw corn stover to lactic acid

Jiang

et al. 2016

Sci Rep

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Fractionation is considered to be one promising strategy to utilize raw biomass to its fullest and produce chemicals with high selectivity. Herein, ethanol/H2O (1/1, v/v) co-solvent with 0.050 M oxalic acid is used to simultaneously fractionate 88.0 wt% of hemicellulose and 89.2 wt% of lignin in corn stover, while cellulose is not obviously degraded. H2O dissolves hemicellulose, G unit and those with β-O-4 linkage of lignin; whereas ethanol extracts G and S units as well as the skeleton with β-5 and β-β linkages of lignin. Oxalic acid effectively catalyzes the hydrolysis of hemicellulose and breaks the intermolecular linkages between hemicellulose and lignin, therefore further promotes the release of lignin. The dissolved hemicelluloses derivatives are reprocessed to produce lactic acid obtaining a high yield of 79.6 wt% with 90% selectivity by the catalysis of MgO. The remained cellulose and recovered lignin can be used further as feedstock to produce chemicals.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Fractionation for further conversion: from raw corn stover to lactic acid

Jiang

et al. 2016

Sci Rep

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“…The lower holocellulose mass fraction of O. ficus-indica can likely be explained in part by the higher ash and protein mass fractions of this species. The high water mass fractions of A. tequilana (84.9%) and O. ficus-indica (93.9%) (Table 2) suggest that these feedstocks might be suitable for our recently reported catalytic aqueous phase process for direct conversion of cellulose and hemicellulose into levulinic acid and lactic acid, respectively [64,65]. This process converts lignocellulosic biomass into organic acids using water as an environmentally benign reaction media, with heterogeneous catalysts such as ZrO 2 .…”

Section: Compositional Analysis Of Bagassementioning

confidence: 96%

Biomass characterization of Agave and Opuntia as potential biofuel feedstocks

Yang

Carl

et al. 2015

Biomass and Bioenergy

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111

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“…As a substitute, lactic acid can be synthesized from mono- or polysaccharide by chemical catalytic routes using homogeneous5678 or heterogeneous catalysts910111213141516. Catalytic processes may be scalable with the development of improved process design options, which would result in higher productivity and reduce costs related to product work-up.…”

mentioning

confidence: 99%

Selective Chemical Conversion of Sugars in Aqueous Solutions without Alkali to Lactic Acid Over a Zn-Sn-Beta Lewis Acid-Base Catalyst

Shen

Peng

et al. 2016

Sci Rep

107

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Lactic acid is an important platform molecule in the synthesis of a wide range of chemicals. However, in aqueous solutions without alkali, its efficient preparation via the direct catalysis of sugars is hindered by a side dehydration reaction to 5-hydroxymethylfurfural due to Brønsted acid, which originates from organic acids. Herein, we report that a previously unappreciated combination of common two metal mixed catalyst (Zn-Sn-Beta) prepared via solid-state ion exchange synergistically promoted this reaction. In water without a base, a conversion exceeding 99% for sucrose with a lactic acid yield of 54% was achieved within 2 hours at 190 °C under ambient air pressure. Studies of the acid and base properties of the Zn-Sn-Beta zeolite suggest that the introduction of Zn into the Sn-Beta zeolite sequentially enhanced both the Lewis acid and base sites, and the base sites inhibited a series of side reactions related to fructose dehydration to 5-hydroxymethylfurfural and its subsequent decomposition.

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Catalytic conversion of hemicellulosic biomass to lactic acid in pH neutral aqueous phase media

Cited by 131 publications

References 51 publications

Fractionation for further conversion: from raw corn stover to lactic acid

Fractionation for further conversion: from raw corn stover to lactic acid

Biomass characterization of Agave and Opuntia as potential biofuel feedstocks

Selective Chemical Conversion of Sugars in Aqueous Solutions without Alkali to Lactic Acid Over a Zn-Sn-Beta Lewis Acid-Base Catalyst

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