Simultaneous and selective recovery of cellulose and hemicellulose fractions from wheat bran by supercritical water hydrolysis

Cantero, Danilo A.; Martínez, Castro; Bermejo, M. Dolores; Cocero, Marı́a José

doi:10.1039/c4gc01359j

Cited by 74 publications

(52 citation statements)

References 45 publications

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“…Pressure and subsequent temperature 139 variations visible in Fig. S2 were due to deposition of solids inside the needle valve, 140 behavior that was already reported in previous works [9]. To obtain those reactor 141 conditions, the water was gradually heated up from the heat exchanger to the outlet of 142 the three electrical heaters, leaving last heater at 460 ºC.…”

Section: 1biomass Characterization and Experimental Proceduresmentioning

confidence: 91%

“…Then, to validate these results, the results from sugar beet pulp 125 hydrolysis in the laboratory plant (labelled as sbp, from [17]) those from wheat bran 126 (wb, from [9]) were used for comparison between laboratory and pilot scale plants. 127…”

Section: Resultsmentioning

confidence: 99%

“…To evaluate 118 this scaling up sugar beet pulp (SBP) and wheat bran (WB) were hydrolyzed in the 119 FASTSUGARS pilot plant and results were compared to previous ones obtained in the 120 laboratory scale plant [9,17]. 121…”

Section: Resultsmentioning

confidence: 99%

“…As it happened in the laboratory scale 145 plant, installing a heat exchanger to pre-heat the SCW stream allowed reducing the heat 146 requirements by 16%. After depressurization the temperature was around 190 ºC, whichwas slightly higher compared to the laboratory scale plant (160 ºC) [9], probably due tothe pressure drop produced as consequence of filters' installation in the scaled up plant. 149…”

Section: 1biomass Characterization and Experimental Proceduresmentioning

confidence: 99%

“…Processes Group (HPPG) developed a novel technology to selectively hydrolyze 46 cellulose and biomass into sugars, called as FASTSUGARS process [9][10][11]. 47…”

Section: Introductionmentioning

confidence: 99%

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Scaling up the production of sugars from agricultural biomass by ultrafast hydrolysis in supercritical water

Martínez

Adamović

Cantero

et al. 2019

The Journal of Supercritical Fluids

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The FASTSUGARS process for sugars' recovery from agricultural biomass was scaled 14 up from laboratory to pilot plant scale. System performance was evaluated by 15 comparing the results obtained from sugar beet pulp and wheat bran in laboratory and 16 pilot plants. Similar trends were found for each biomass in both plant: as reaction time 17increased, selectivity to sugars decreased and conversion and degradation rate increased. 18Then, to bring the FASTSUGARS process closer to industrial applications, the particle 19 size of the biomass was increased in the pilot plant. It was found that the particle size 20 acted as a mass transfer resistance, slowing down the hydrolysis of biomass, providing 21 lower conversion and therefore reducing sugars' degradation (degradation yield was 22 lower than 15 % in the pilot plant). In that way, higher selectivity to sugars was 23

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Section: 1biomass Characterization and Experimental Proceduresmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: 1biomass Characterization and Experimental Proceduresmentioning

confidence: 99%

“…Processes Group (HPPG) developed a novel technology to selectively hydrolyze 46 cellulose and biomass into sugars, called as FASTSUGARS process [9][10][11]. 47…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Scaling up the production of sugars from agricultural biomass by ultrafast hydrolysis in supercritical water

Martínez

Adamović

Cantero

et al. 2019

The Journal of Supercritical Fluids

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Conversion of Lignocellulosic Biomass to Reducing Sugars in High Pressure and Supercritical Fluids: Greener Alternative for Biorefining of Renewables

Kumar

Kermanshahi-pour

Brar

et al. 2021

Advanced Sustainable Systems

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Supercritical fluids offer great potential to be employed in lignocellulosic biomass (LCB) fractionation in biorefinery. Supercritical carbon dioxide and water are greener alternatives compared with conventional reagents and have been investigated for the pretreatment and hydrolysis of lignocellulosic biomass. This review is focused on examining the fundamentals that govern the function of supercritical fluids in the pretreatment stage, as well as in the main hydrolysis reaction. Sub/supercritical carbon dioxide is used in pretreatment and sub/supercritical water has been the solvent of choice in hydrolysis of LCB. Significant research has gone into understanding the effect of process parameters such as temperature, pressure, cosolvent, and use of external catalyst on the sugar yield in biorefining of the LCB in supercritical fluids. It is shown that processes with reduced environmental impact and energy consumption can significantly enhance biorefining of LCB at commercial scale. Enzymatic hydrolysis of LCB in supercritical carbon dioxide is a promising approach that can accommodate mild reaction conditions. Developing an understanding of the performance of enzymes in high pressure systems and designing carriers for enzyme immobilization and further recycling is expected to enable one pot pretreatment and hydrolysis and is an important milestone in processing renewable resources for deriving biofuel and value‐added chemicals.

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Governing Chemistry of Cellulose Hydrolysis in Supercritical Water

2015

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9This article summarizes the recent efforts in the High Pressure Processes Group labs at UVa 10 regarding the fundamentals of biomass hydrolysis in pressurized water medium. At extremely 11 low reaction times (0.02 s), cellulose was hydrolyzed in supercritical water (400ºC and 25 12 MPa) obtaining a sugars yield higher than 95% w·w -1 while 5-HMF yield was lower than 13 0.01% w·w -1 . When the reaction times was increased up to 1 s, the main product was 14 glycolaldehyde (60% w·w -1 ). Independently of the reaction time, the yield of 5-HMF was 15 always lower than 0.01% w·w -1 . In order to evaluate the reaction pathway and mechanism of 16 plant biomass in pressurized water, several parameters (temperature, pressure, reaction time 17 and reaction medium) were studied for different biomasses (cellulose, glucose, fructose and 18 wheat bran). It was considered that the reactions of glucose isomerization to fructose as well 19 as fructose dehydration to 5-HMF take place via proton or hydroxide anion association. So, 20 their concentration was taken into account as reagent concentration in the reaction 21 evaluations. It was found that the proton and hydroxide anion concentration in the medium 22 due water dissociation is the determining factor in the selectivity of the process. The reaction 23 of glucose isomerization to fructose and its further dehydration to produce 5-HMF are highly 24 dependent on ions concentration. By increasing pOH/pH, these reactions were minimized 25 allowing the control of 5-HMF production. At this condition, the retro-aldol condensation 26 pathway was enhanced instead of isomerization/dehydration pathway. 27 3 INTRODUCTION 28

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Simultaneous and selective recovery of cellulose and hemicellulose fractions from wheat bran by supercritical water hydrolysis

Abstract: A contribution to biomass conversion into sugars and lignin using a compact reactor that is easy to scale-up was made. Wheat bran was continuously fractionated under supercritical water conditions.

Cited by 74 publications

References 45 publications

Scaling up the production of sugars from agricultural biomass by ultrafast hydrolysis in supercritical water

Scaling up the production of sugars from agricultural biomass by ultrafast hydrolysis in supercritical water

Conversion of Lignocellulosic Biomass to Reducing Sugars in High Pressure and Supercritical Fluids: Greener Alternative for Biorefining of Renewables

Governing Chemistry of Cellulose Hydrolysis in Supercritical Water

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