Saccharide separation from wood prehydrolysis liquor: comparison of selectivity toward non-saccharide compounds with separate techniques

Wang, Zhaojiang; Wang, Xiaojun; Fu, Yingjuan; Yuan, Zaiwu; Qin, Menghua

doi:10.1039/c4ra17017b

Cited by 18 publications

(16 citation statements)

References 27 publications

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“…Observation of these bands in FTIR spectrum of AgNS clearly indicate the adsorption of some bioactive molecules having reducing functional groups viz., C=C, C=C, (NH)C=O (flavanones, proteins and amino acids), -OH (polyphenols) and hemicelluloses from the PHL on to the AgNS. The presence of these reducing compounds in the PHL brings about the reduction of silver ions and their adsorption on the AgNS preventing their agglomeration [31,32,[34][35][36].…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

“…In the pulp mills, wood chips (Nilgiri in the present work) are treated in a high-temperature prehydrolysis step to remove hemicelluloses in the "prehydrolysis kraft dissolving pulp production process". During this procedure, hemicelluloses and other organics are dissolved in the pre-hydrolysed liquor (PHL) [31,32]. The PHL thus contains water soluble metabolites such as reducing sugars along with disaccharides, oligosaccharides and non-saccharides from Nilgiri Wood.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Detection of Nitrite Using Glassy Carbon Electrode Modified with Silver Nanospheres (AgNS) Obtained by Green Synthesis Using Pre‐hydrolysed Liquor

Shivakumar¹,

Nagashree²,

Manjappa

et al. 2017

Electroanalysis

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Silver nanospheres (AgNS) with SPR band ∼417 nm was synthesized by Green synthesis, using a pre‐hydrolysed liquor (PHL) of Nilgiri wood without any pretreatment. The synthesis was carried out at room temperature and was complete within three hours. The reduction and stabilization of silver is brought about by hemicelluloses present in the pre‐hydrolysed liquor. Electrochemical oxidation of nitrite on glassy carbon electrode (GCE) modified with the AgNS in 0.1 M phosphate buffer solution (PBS) of pH 7.0 was found to occur at 0.86 V with respect to Ag/AgCl. Electrochemical sensing experiments with AgNS/GCE showed a linear range of detection between 0.1 to 8 μM, with detection limit of 0.031 μM and a sensitivity of 580 μA mM−1cm−2.

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Section: Synthesis and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Nitrite Using Glassy Carbon Electrode Modified with Silver Nanospheres (AgNS) Obtained by Green Synthesis Using Pre‐hydrolysed Liquor

Shivakumar¹,

Nagashree²,

Manjappa

et al. 2017

Electroanalysis

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“…In this case, sugarscan be separated from lignin by their different solubility in water and then purified by the above-mentioned technologies. [21] Figure 2C shows the mass balance of lignin after RFF treatments at different conditions. Increasingt emperature is helpful for delignification as indicated by the reduction of the lignin remaining in the pulp.…”

Section: Resultsmentioning

confidence: 99%

Rapid Nondestructive Fractionation of Biomass (≤15 min) by using Flow‐Through Recyclable Formic Acid toward Whole Valorization of Carbohydrate and Lignin

Zhou

Tan

et al. 2019

ChemSusChem

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Whole valorization of carbohydrate and lignin from biomass was achieved by rapid flow‐through fractionation (RFF) within 15 min. Wheat straw was effectively deconstructed into its principle components without degradation by using easily recyclable aqueous formic acid (72 wt %) at 130 °C. The obtained cellulose‐rich solid showed a nearly complete glucan recovery and 73.8 % glucose conversion after enzymatic hydrolysis. Xylan also reached full recovery with negligible furfural formation with a sum of 80 % of oligo/mono xylose in spent liquor and 20 % of xylan remaining in the solid. Up to 75.4 % lignin was dissolved in the spent liquor and further fractionated into water‐insoluble (WIL) and water‐soluble lignin (WSL) by dilution with water. WIL showed a non‐condensed and well‐preserved structure with 84.5 % β‐O‐4 remaining, which is believed to be beneficial for catalytic conversion into low‐molecular‐weight chemicals and fuels. The concentration of employed formic acid was below the formic acid/water azeotrope, and therefore the reaction medium could be restored through simple distillation. Together with the joint valorization of lignin and carbohydrates, the presented RFF is a promising process for sustainable biorefinery.

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“…The acid-soluble lignin content in the PHL was measured using a UV/Vis spectrometric method at a wavelength of 205 nm according to TAPPI UM 250 (Shen et al 2011;Shi et al 2011;Wang et al 2014). Formic acid, acetic acid, and furfural were analyzed by an HPLC system equipped with a Waters C18 symmetry column (4.6 × 150 mm, 5 mm) and a UV/Vis detector at 210 nm (formic acid and acetic acid) and 275 nm (furfural) at 30 °C with 0.1% H3PO4 (v/v) as eluents (Wang et al 2015b). …”

Section: Dissolved Lignocelluloses Analysismentioning

confidence: 99%

“…The monomeric sugars of the PHL were measured using high-performance anion-exchange chromatography coupled with a pulsed amperometric detector (HPAEC-PAD) and an HPAEC-PAD system (ICS-5000,Thermo Fisher, Sunnyvale, CA) equipped with a CarboPac PA20 analytical column. A guard column was used for MS determination (Wang et al 2015b). The acid-soluble lignin content in the PHL was measured using a UV/Vis spectrometric method at a wavelength of 205 nm according to TAPPI UM 250 (Shen et al 2011;Shi et al 2011;Wang et al 2014).…”

Section: Dissolved Lignocelluloses Analysismentioning

confidence: 99%

Effect of Boric Acid Addition on the Prehydrolysis of Whangee

Tong

Zhao

et al. 2016

BioResources

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Prehydrolysis is an important step in the kraft-based dissolving process for pulp production, as it helps remove as much hemicellulose as possible from cellulose fibers before the material is subjected to the main delignification operation, i.e., pulping. In this paper, a novel process concept was proposed by adding different dosages of boric acid (BA) based on the oven dry weight of Whangee, a genus of bamboo, in the prehydrolysis stage. The final yields of the prehydrolysis stage obviously increased and ferric ion contents in the hydrolyzed Whangee largely decreased with the addition of BA. Additionally, the highest α-cellulose retention occurred at a BA dosage of 0.5%. The results of acetic acid percent in the total sugars and furfural percent in xylose of the PHL showed that the addition of BA had an important impact on the structure of hemicelluloses in Whangee. Mass balance analysis of the PHL and Whangee indicated that the partly acid-insoluble lignin in Whangee was likely converted into acid-soluble lignin in the PHL.

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Saccharide separation from wood prehydrolysis liquor: comparison of selectivity toward non-saccharide compounds with separate techniques

Abstract: Selectivity comparison for saccharides separation from wood hydrolysate.

Cited by 18 publications

References 27 publications

Electrochemical Detection of Nitrite Using Glassy Carbon Electrode Modified with Silver Nanospheres (AgNS) Obtained by Green Synthesis Using Pre‐hydrolysed Liquor

Electrochemical Detection of Nitrite Using Glassy Carbon Electrode Modified with Silver Nanospheres (AgNS) Obtained by Green Synthesis Using Pre‐hydrolysed Liquor

Rapid Nondestructive Fractionation of Biomass (≤15 min) by using Flow‐Through Recyclable Formic Acid toward Whole Valorization of Carbohydrate and Lignin

Effect of Boric Acid Addition on the Prehydrolysis of Whangee

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