Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species

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 composit...

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Main Authors: Jinping Zhang, Menghao Du, Lisong Hu
Format: Article
Language:English
Published: North Carolina State University 2016-10-01
Series:BioResources
Subjects:
Online Access:http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_9956_Zhang_Polyol_Liquefaction_Nut_Shells
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author Jinping Zhang
Menghao Du
Lisong Hu
author_facet Jinping Zhang
Menghao Du
Lisong Hu
author_sort Jinping Zhang
collection DOAJ
description 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 (R2) greater than 0.7082, indicating that the liquefaction of CNS was a pseudo-first-order reaction.
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spelling doaj.art-e4ea939bedbd43068bcfe0c14d08b8d92022-12-21T17:56:14ZengNorth Carolina State UniversityBioResources1930-21261930-21262016-10-011149956996910.15376/biores.11.4.9956-9969Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia SpeciesJinping Zhang0Menghao Du1Lisong Hu2Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, Zhejiang, 311400, P. R. China; ChinaResearch Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, Zhejiang, 311400, P. R. China; ChinaResearch Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, Zhejiang, 311400, P. R. China; ChinaThe 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 (R2) greater than 0.7082, indicating that the liquefaction of CNS was a pseudo-first-order reaction.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_9956_Zhang_Polyol_Liquefaction_Nut_ShellsChemical compositionCamellia nut shellLiquefactionCellulose Crystallinity indexLiquefaction kinetics
spellingShingle Jinping Zhang
Menghao Du
Lisong Hu
Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species
BioResources
Chemical composition
Camellia nut shell
Liquefaction
Cellulose Crystallinity index
Liquefaction kinetics
title Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species
title_full Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species
title_fullStr Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species
title_full_unstemmed Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species
title_short Factors Influencing Polyol Liquefaction of Nut Shells of Different Camellia Species
title_sort factors influencing polyol liquefaction of nut shells of different camellia species
topic Chemical composition
Camellia nut shell
Liquefaction
Cellulose Crystallinity index
Liquefaction kinetics
url http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_9956_Zhang_Polyol_Liquefaction_Nut_Shells
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AT lisonghu factorsinfluencingpolyolliquefactionofnutshellsofdifferentcamelliaspecies