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1. The influence of combined pretreatment with surfactant/ultrasonic and hydrothermal carbonization on fuel properties, pyrolysis and combustion behavior of corn stalk

Author:
Xu, Xiwei; Tu, Ren; Sun, Yan; Wu, Yujian; Jiang, Enchen; Zhen, Jinrong
Source:
Bioresource technology 2019 v.271 pp. 427-438
ISSN:
0960-8524
Subject:
hemicellulose,   etc   ; activation energy; cellulose; coal; combustion; corn stover; heat; hydrochars; hydrolysis; hydrothermal carbonization; lignin; pyrolysis; surfactants; temperature; thermogravimetry; ultrasonics;     Show all 16 Subjects
Abstract:
... The surfactant/ultrasonic combined with hydrothermal carbonization (HTC) were performed to investigate the effect on fuel properties, pyrolysis and combustion behavior of hydrochar under different condition. The results showed that the C/H and O/C ratio of corn stalk (CS) + H2SO4 + tween was 1.1 and 0.29, which were close to coal, and the heat value reached 28.89 MJ/kg. HTC combined with ultrasoni ...
DOI:
10.1016/j.biortech.2018.09.066

2. Improvement of alkali efficiency for purification of dissolving pulp by a modified cold caustic extraction process

Author:
He, Liang; Guan, Qing-Qing; Peng, Lin-Cai; Chen, Ke-Li; Chai, Xin-Sheng
Source:
Carbohydrate polymers 2017
ISSN:
0144-8617
Subject:
hemicellulose,   etc   ; cost effectiveness; dissolving pulp;     Show all 3 Subjects
Abstract:
... In this study, a reutilization of caustic lye during cold caustic extraction (i.e., CCE) process to produce high-purity dissolving pulp and high-concentrated hemicellulose solution was proposed. The results showed that the lye can be reused about 12 times for producing high-purity dissolving pulps. With the number of CCE stages of 12, the hemicellulose in the lye can be auto-concentrated to about ...
DOI:
10.1016/j.carbpol.2017.09.085

3. Strengthening effects of carboxymethylated hemicellulosic fractions on paper strength

Author:
Zhao, Yushuang; Jing, Shuangshuang; Zhang, Xiaoting; Chen, Zehong; Zhuo, Hao; Hu, Yijie; Liu, Qingzhong; Zhong, Linxin; Peng, Xinwen; Sun, Runcang
Source:
Industrial crops and products 2018 v.125 pp. 360-369
ISSN:
0926-6690
Subject:
hemicellulose,   etc   ; corn cobs; ethanol; mechanical properties; molecular weight; paper;     Show all 6 Subjects
Abstract:
... Although hemicelluloses have demonstrated their promising application as paper strengthening agents, the influences of different hemicellulosic fractions on the mechanical properties of paper are not clear. Revealing the reinforcing effect of hemicellulosic fractions on the mechanical properties of paper is very helpful to better utilize hemicelluloses. For this purpose, four hemicellulosic fracti ...
DOI:
10.1016/j.indcrop.2018.09.014

4. Effect of autohydrolysis on alkaline delignification of mixed hardwood chips and on lignin structure

Author:
Curmi, Hélène; Chirat, Christine; Brochier Salon, Marie-Christine; Lachenal, Dominique
Source:
Holzforschung 2018 v.72 no.8 pp. 631-636
ISSN:
1437-434X
Subject:
hemicellulose,   etc   ; autohydrolysis; bleaching; delignification; depolymerization; hardwood; lignin; pulping;     Show all 8 Subjects
Abstract:
... Autohydrolysis (AH) prior to the kraft process is one way to valorize hemicelluloses. The presented results show that AH also has a beneficial effect insofar as kraft cooking can be substituted by soda cooking, and higher brightness levels can be achieved under the same bleaching conditions. The lignin has more free phenolic groups after AH, which is attributable to depolymerization, and which cou ...
DOI:
10.1515/hf-2017-0196

5. Analysis of Flax Fiber Cell-Wall Non-Cellulosic Polysaccharides Under Different Weather Conditions (Marylin Variety)

Author:
Lefeuvre, Anaële; Baley, Christophe; Morvan, Claudine
Source:
Journal of natural fibers 2018 v.15 no.4 pp. 539-544
ISSN:
1544-046X
Subject:
hemicellulose,   etc   ; drought; mechanical properties; pectins; rain; uronic acids;     Show all 6 Subjects
Abstract:
... The cell-wall composition has been analyzed for 13 batches of flax fibers grown over 3 years under 3 different weather conditions including a ‘normal one, a harsh drought and a rainy weather. It was found that both stresses, drought and excess of rain induced a decrease of uronic acid in the matrix and an increase of the structuring pectins. Besides, a drought led to an increase of hemicellulose p ...
DOI:
10.1080/15440478.2017.1349020

6. Reactivity of main components and substituent distribution in esterified sugarcane bagasse prepared by effective solid phase reaction

Author:
Gan, Tao; Zhang, Yanjuan; Chen, Yane; Hu, Huayu; Yang, Mei; Huang, Zuqiang; Chen, Dong; Huang, Aimin
Source:
Carbohydrate polymers 2018 v.181 pp. 633-641
ISSN:
0144-8617
Subject:
hemicellulose,   etc   ; cellulose; esterification; lignin; lignocellulose; maleic acid; milling; sugarcane bagasse;     Show all 8 Subjects
Abstract:
... Three main components of lignocellulose (cellulose, hemicellulose, and lignin isolated from sugarcane bagasse (SCB)) as well as holocellulose and SCB were modified with maleic acid by mechanical activation (MA)-assisted solid phase reaction (MASPR) technology. The order of reactivity was found to be lignin>hemicellulose>cellulose. The amorphous structure of lignin and hemicellulose mainly attribut ...
DOI:
10.1016/j.carbpol.2017.11.102

7. Influence of torrefaction on intrinsic bioconstituents of cotton stalk: TG-insights

Author:
Gangil, Sandip; Bhargav, Vinod Kumar
Source:
Energy 2018 v.142 pp. 1066-1073
ISSN:
0360-5442
Subject:
hemicellulose,   etc   ; activation energy; biobased products; cellulose; cotton; lignin; torrefaction;     Show all 7 Subjects
Abstract:
... This is the first article presenting the detection of discrete and stratified nature of fringes in the lignin-related segment of the activation energy profile of a biomaterial. The torrefied biomaterial made from the cotton stalk was evaluated for intrinsic physico-chemical transformations in comparison with the raw cotton stalk. The intrinsic hemicellulose and cellulose components disappeared due ...
DOI:
10.1016/j.energy.2017.10.128

8. New features of arabinoxylan ethers revealed by using multivariate analysis

Author:
Nylander, Filip; Svensson, Olof; Josefson, Mats; Larsson, Anette; Westman, Gunnar
Source:
Carbohydrate polymers 2019 v.204 pp. 255-261
ISSN:
0144-8617
Subject:
hemicellulose,   etc   ; Fourier transform infrared spectroscopy; arabinoxylan; barley; carbohydrate structure; chemical derivatives; ethers; hulls; multivariate analysis; principal component analysis; renewable resources; vibration;     Show all 12 Subjects
Abstract:
... Hemicelluloses are a relatively unused renewable resource. One reason is their broad structure variety that makes it hard to understand structure-property relations. In this study arbinoxylan, extracted from barley husk, was chemically modified into hydroxypropyl methyl-, hydroxypropyl- and methyl arabinoxylan. The relationship between structure and phase behavior was investigated by using multiva ...
DOI:
10.1016/j.carbpol.2018.09.062

9. Concerning operational aspects in supercritical water gasification of kraft black liquor

Author:
De Blasio, Cataldo; De Gisi, Sabino; Molino, Antonio; Simonetti, Marco; Santarelli, Massimo; Björklund-Sänkiaho, Margareta
Source:
Renewable energy 2019 v.130 pp. 891-901
ISSN:
0960-1481
Subject:
hemicellulose,   etc   ; aqueous solutions; biofuels; boilers; carbon dioxide; coal; computer software; cooking; energy; energy content; gasification; hydrogen; hydrogen sulfide; lignin; methane; pulping; sucrose; temperature; waste liquors; wood;     Show all 20 Subjects
Abstract:
... Kraft Black Liquor (KBL) is an aqueous solution of lignin residues, hemicelluloses and inorganic chemicals produced during the pulping process. It is sometimes classified as waste even if this definition is wrong in most of the cases where the BL is reutilized (recovered) by using it as fuel in recovery boilers. In this process, the pulping chemicals are recovered and sent again to the cooking pro ...
DOI:
10.1016/j.renene.2018.07.004

10. The changes in carbon, nitrogen components and humic substances during organic-inorganic aerobic co-composting

Author:
Yu, Huiyong; Xie, Beitao; Khan, Rayyan; Shen, Guoming
Source:
Bioresource technology 2019 v.271 pp. 228-235
ISSN:
0960-8524
Subject:
hemicellulose,   etc   ; acid hydrolysis; adverse effects; amino acids; ammonia; biochar; carbon; cellulose; composting; fermentation; humic substances; humification; lignin; mineral fertilizers; organic nitrogen; oxygen; pH; temperature; value added;     Show all 19 Subjects
Abstract:
... In this article, the changes in carbon, nitrogen components, and humic substances during organic-inorganic aerobic co-composting, with adding biochar as an additive or not, were studied. Results showed that adding a certain amount of inorganic fertilizers had no adverse effects on the compost fermentation process. Biochar enhanced the temperature, pH, oxygen content in the compost piles and ultima ...
DOI:
10.1016/j.biortech.2018.09.088

11. Hydrothermal pretreatment of wood by mild steam explosion and hot water extraction

Author:
Wojtasz-Mucha, Joanna; Hasani, Merima; Theliander, Hans
Source:
Bioresource technology 2017 v.241 pp. 120-126
ISSN:
0960-8524
Subject:
hemicellulose,   etc   ; lignocellulose; mass transfer; wood; wood chips;     Show all 5 Subjects
Abstract:
... The aim of this work was to compare the two most common hydrothermal pre-treatments for wood – mild steam explosion and hot water extraction – both with the prospect of enabling extraction of hemicelluloses and facilitating further processing. Although both involve autohydrolysis of the lignocellulosic tissue, they are performed under different conditions: the most prominent difference is the rapi ...
DOI:
10.1016/j.biortech.2017.05.061

12. Functional comparison of versatile carbohydrate esterases from families CE1, CE6 and CE16 on acetyl-4-O-methylglucuronoxylan and acetyl-galactoglucomannan General subjects

Author:
Mai-Gisondi, Galina; Maaheimo, Hannu; Chong, Sun-Li; Hinz, Sandra; Tenkanen, Maija; Master, Emma
Source:
Biochimica et biophysica acta 2017 v.1861 no.9 pp. 2398-2405
ISSN:
0304-4165
Subject:
hemicellulose,   etc   ; biobased products; esterases; moieties; sugars;     Show all 5 Subjects
Abstract:
... The backbone structure of many hemicelluloses is acetylated, which presents a challenge when the objective is to convert corresponding polysaccharides to fermentable sugars or else recover hemicelluloses for biomaterial applications. Carbohydrate esterases (CE) can be harnessed to overcome these challenges.Enzymes from different CE families, AnAcXE (CE1), OsAcXE (CE6), and MtAcE (CE16) were compar ...
DOI:
10.1016/j.bbagen.2017.06.002

13. Surface forces in lignocellulosic systems

Author:
Österberg, Monika; Valle-Delgado, Juan José
Source:
Current opinion in colloid & interface science 2017 v.27 pp. 33-42
ISSN:
1359-0294
Subject:
hemicellulose,   etc   ; cellulose; lignin; lignocellulose; papermaking; surface interactions;     Show all 6 Subjects
Abstract:
... Lignocellulosics, i.e., cellulose, lignin and hemicelluloses, are natural renewable polymers of high technological interest. The properties of products based on these polymers are largely determined by the forces at their interfaces. This review summarizes the main findings related to surface interactions relevant for papermaking and describes how the interest in novel, high performance renewable ...
DOI:
10.1016/j.cocis.2016.09.005

14. Thermal modification of African alpine bamboo : Mass loss, chemical composition and impact resistance

Author:
Starke, Robert; Rosenthal, Michael; Bues, Claus-Thomas; Bremer, Martina; Fischer, Steffen
Source:
European journal of wood and wood products 2016 v.74 no.6 pp. 901-903
ISSN:
0018-3768
Subject:
hemicellulose,   etc   ; bamboos; chemical composition; temperature;     Show all 4 Subjects
Abstract:
... Within the temperature range from 160 to 220 [Formula: see text]C, an increase of 20 K doubled the mass loss of thermally modified African alpine bamboo (Yushania alpina). It reflected the decomposition of hemicelluloses and correlated with the deterioration of impact resistance. The treatment temperatures had a stronger effect than the time of modification. ...
DOI:
10.1007/s00107-016-1092-4

15. Accurate molar masses of cellulose for the determination of degradation rates in complex paper samples

Author:
Dupont, Anne-Laurence; Réau, Denis; Bégin, Paul; Paris-Lacombe, Sabrina; Tétreault, Jean; Mortha, Gérard
Source:
Carbohydrate polymers 2018 v.202 pp. 172-185
ISSN:
0144-8617
Subject:
hemicellulose,   etc   ; activation energy; cellulose; gel chromatography; lignin; mechanical pulp; molecular weight; paper; prediction;     Show all 9 Subjects
Abstract:
... Complex cellulosic samples are often difficult to analyse with size-exclusion chromatography. The strong molecular associations of hemicelluloses and lignin with cellulose produce multimodal molar mass distributions (MMD) that are difficult to interpret. More reliable ways of calculating the molar masses of cellulose are thus necessary. This is particularly relevant when studying the kinetics of p ...
DOI:
10.1016/j.carbpol.2018.08.134

16. Extraction of nano cellulose fibers from the banana peel and bract for production of acetyl and lauroyl cellulose

Author:
Harini, K.; Ramya, K.; Sukumar, M.
Source:
Carbohydrate polymers 2018 v.201 pp. 329-339
ISSN:
0144-8617
Subject:
hemicellulose,   etc   ; banana peels; biopolymers; cellulose; cellulose microfibrils; crystal structure; lignin; microwave treatment; milling; thermal stability;     Show all 10 Subjects
Abstract:
... The principal aim of the present study is to develop a method for the production of cellulose nanofibers, from the banana peel (BP) and bract (BB). It is also the aim of this study to produce cellulose-based biopolymers through acetyl and lauroyl modifications. The microwave digestion method and ball milling assisted ultra-sonication method was optimized for sustainable extraction of micro and nan ...
DOI:
10.1016/j.carbpol.2018.08.081

17. A fast and sensitive activity assay for lytic polysaccharide monooxygenase

Author:
Breslmayr, Erik; Hanžek, Marija; Hanrahan, Aoife; Leitner, Christian; Kittl, Roman; Šantek, Božidar; Oostenbrink, Chris; Ludwig, Roland
Source:
Biotechnology for biofuels 2018 v.11 no.1 pp. 79
ISSN:
1754-6834
Subject:
hemicellulose,   etc   ; absorption; cellulose; chitin; cleavage (chemistry); enzyme activity; hydrogen peroxide; laccase; peroxidase; screening; thermal stability;     Show all 11 Subjects
Abstract:
... BACKGROUND: Lytic polysaccharide monooxygenases (LPMO) release a spectrum of cleavage products from their polymeric substrates cellulose, hemicellulose, or chitin. The correct identification and quantitation of these released products is the basis of MS/HPLC-based detection methods for LPMO activity. The duration, effort, and intricate analysis allow only specialized laboratories to measure LPMO a ...
DOI:
10.1186/s13068-018-1063-6

18. A novel hybrid organosolv: steam explosion method for the efficient fractionation and pretreatment of birch biomass

Author:
Matsakas, Leonidas; Nitsos, Christos; Raghavendran, Vijayendran; Yakimenko, Olga; Persson, Gustav; Olsson, Eva; Rova, Ulrika; Olsson, Lisbeth; Christakopoulos, Paul
Source:
Biotechnology for biofuels 2018 v.11 no.1 pp. 160
ISSN:
1754-6834
Subject:
hemicellulose,   etc   ; Betula; biomass; cellulose; cooking; delignification; ethanol; fermentation; fractionation; lignin; saccharification; sulfuric acid;     Show all 12 Subjects
Abstract:
... BACKGROUND: The main role of pretreatment is to reduce the natural biomass recalcitrance and thus enhance saccharification yield. A further prerequisite for efficient utilization of all biomass components is their efficient fractionation into well-defined process streams. Currently available pretreatment methods only partially fulfill these criteria. Steam explosion, for example, excels as a pretr ...
DOI:
10.1186/s13068-018-1163-3

19. Effect of water-washing of wheat straw and hydrothermal temperature on its hydrochar evolution and combustion properties

Author:
Ma, Qiulin; Han, Lujia; Huang, Guangqun
Source:
Bioresource technology 2018 v.269 pp. 96-103
ISSN:
0960-8524
Subject:
hemicellulose,   etc   ; activation energy; carbon; combustion; energy; fuels; hot water treatment; hydrochars; leaching; microparticles; temperature; wheat straw;     Show all 12 Subjects
Abstract:
... In order to upgrade wheat straw, hydrothermal treatment at 160–240 °C was investigated. Meanwhile, the influence of temperature and leaching on the fuel’s physicochemical and combustion properties were explored. A temperature of 180–220 °C was found to benefit the generation of hydrochar, with solid and energy yields of at least 57.3% and 69.9%, respectively. When temperature increased to 160 °C, ...
DOI:
10.1016/j.biortech.2018.08.082

20. Influence of membrane filtration on extraction and characteristics of lignin from a kraft dissolving pulp mill pre-hydrolysate

Author:
Mazar, Adil; Jemaa, Naceur; Al Dajani, Waleed Wafa; Marinova, Mariya; Perrier, Michel
Source:
Industrial crops and products 2018 v.124 pp. 726-734
ISSN:
0926-6690
Subject:
hemicellulose,   etc   ; chemical precipitation; dissolving pulp; hardwood; lignin; microfiltration; molecular weight; pulping; steam; streams; sugars; sulfuric acid;     Show all 12 Subjects
Abstract:
... During dissolving pulp production, the extraction of hemicellulose and other organics from hardwood chips prior to the kraft pulping process can be performed using steam or hot water. The pre-hydrolysate from this step is rich in sugars and contains a considerable amount of lignin. It is estimated that the lignin content in this stream can be as high as 28 t d⁻¹ for a kraft dissolving pulp mill pr ...
DOI:
10.1016/j.indcrop.2018.08.046