Liquefaction of bamboo shoot shell for the production of polyols

Ye, Liyi; Zhang, Jingmiao; Zhao, Jie; Song, Tao

doi:10.1016/j.biortech.2013.11.070

Cited by 122 publications

(51 citation statements)

References 32 publications

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“…The ash contained minerals, including K, Na, Si, Fe, Al, and trace elements that were very difficult to liquefy. The ash was partially dissolved in liquefied solvent, while the rest remained in the residue, which is consistent with conclusions reported by Li et al (2014) that the liquefaction ash of bamboo shoot shells was partially dissolved in PEG400/ EG/ acid liquefying solvent.…”

Section: Liquefaction Residues Of the Nut Shells Of Different Camellisupporting

confidence: 92%

“…Various biomasses, such as bamboo (Aysu and Küçük 2013), crop residues (Hassan and Shukry 2008;Wei et al 2013), barks (D'Souza and Yan 2013), sawdust (Hui et al 2012), poplar (Li et al 2008), bamboo shells (Li 2014), bagasse (Ting et al 2007), and palm shells (Omoriyekomwan et al 2016), have been used as raw materials for liquefaction. Liquefying agents reported so far include phenol, polyethylene glycol, glycerin, ethylene glycol , ethylene carbonate (Xie and Chen 2005), and ionic liquids (Xie and Shi 2006;Zheng et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species

Zhang

2016

BioResources

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The liquefaction rates and kinetics of nut shells of different Camellia species in PEG400/glycerol/H2SO4 liquefying solvent were investigated. Changes in major components including cellulose, hemicellulose, and lignin as well as cellulose crystallinity of the nut shells were determined. The compositions of the liquefaction residues were analyzed. Results indicated that, under the same conditions, the liquefaction rates of nut shells of different Camellia species were noticeably different and the PEG400/glycerol/H2SO4 liquefaction agent was not suitable for the liquefaction of the nut shells of all Camellia species. The burst liquefaction of Camellia nut shells (CNSs) that occurred during the first stage was due to the rapid degradation of hemicellulose, acid-soluble lignin, and amorphous cellulose. The liquefaction during the second stage became very slow, mostly because the swelling and decomposition of crystalline cellulose was very difficult to achieve with the liquefying agent and the liquefaction products inhibited liquefaction at later stages. The liquefaction residues of CNSs were composed of crystalline cellulose, small amounts of hemicellulose, acid-insoluble lignin, and ash. Ash was partially dissolved in the liquefying agent. The liquefaction rates of all CNSs tested in this study showed linear relationships with time, with coefficients of determination (R 2 ) greater than 0.7082, indicating that the liquefaction of CNS was a pseudo-firstorder reaction.

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Section: Liquefaction Residues Of the Nut Shells Of Different Camellisupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species

Zhang

2016

BioResources

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“…The main reactions occurring during liquefaction are the degradation of biomass ingredients, esterification and polycondensation. The final structure of the obtained products mainly depends on the solvent used, and the conditions of the process (Ye et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al (2007) used ethylene glycol to liquefy bagasse in the presence of sulfuric acid (VI), while Ye et al (2014) converted bamboo shoot shells into a polyol with the mixture of EG and PEG. Glycerol, used alone or in combination with other solvents, seems to be the most popular chemical to liquefy cork (Yona et al 2014), acid hydrolysis residue of corncob (Zhang et al 2012), biodiesel production solid residues (Briones et al 2011a, b), wheat straw (Wang and Chen 2007), and bagasse or cotton stalks (Hassan and Shukry 2008).…”

Section: Introductionmentioning

confidence: 99%

Biopolyols obtained via crude glycerol-based liquefaction of cellulose: their structural, rheological and thermal characterization

et al. 2016

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In this work lignocellulose biomass liquefaction was used to produce biopolyols suitable for the manufacturing of rigid polyurethane foams. In order to better evaluate the mechanism of the process, pure cellulose was applied as a raw material. The effect of time and temperature on the effectiveness of liquefaction and the parameters of resulting biopolyols were characterized. The prepared materials were analyzed in terms of their chemical structure, rheology, thermal and oxidative stability, and basic physical and mechanical properties that are important from the point of view of polyurethane manufacturing. The optimal parameters for the biopolyol production with a 94 % yield were achieved at 150°C for a 6-h reaction duration. The obtained polyols were characterized by the hydroxyl number of 643 mg KOH/g and enhanced thermal and oxidative stability compared to the polyols obtained at lower temperatures, which is associated with the altered mechanism of liquefaction. The results of rheological tests, analyzed with the use of Ostwald-de Waele and Herschel Bulkley models, revealed that the prepared biopolyols can be classified as pseudoplastic fluids with the viscosity values similar to those of commercially available products. Rigid foams obtained via partial substitution of petrochemical polyol with prepared biobased one were characterized by slightly increased apparent density and average cell size comparing to unmodified materials. The best mechanical performance was observed for the sample containing 35 wt% of biopolyol in the polyol mixture, which indicates a synergistic effect between the applied polyols. The applied modification delayed thermal degradation of foams due to changes in thermal decomposition process. In conclusion, the presented work confirms that lignocellulose biomass liquefaction can be successfully applied as a manufacturing method of polyols later used in the production of polyurethanes.

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“…Bamboo-shoot shell is a type of by-product of the agriculture and forestry processing industry (Ye et al, 2014). Cellulose, hemicellulose and lignin account for the majority.…”

Section: Introductionmentioning

confidence: 99%

A possible water-soluble inducer for synthesis of cellulase in Aspergillus niger

Zhang

Thakur

et al. 2017

Bioresource Technology

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Liquefaction of bamboo shoot shell for the production of polyols

Cited by 122 publications

References 32 publications

Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species

Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species

Biopolyols obtained via crude glycerol-based liquefaction of cellulose: their structural, rheological and thermal characterization

A possible water-soluble inducer for synthesis of cellulase in Aspergillus niger

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