scholarly journals New pentose dimers with bicyclic moieties from pretreated biomass

RSC Advances ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 5206-5213 ◽  
Author(s):  
H. Rasmussen ◽  
H. R. Sørensen ◽  
D. Tanner ◽  
A. S. Meyer
Keyword(s):  
Wheat Straw ◽  
Biomass Pretreatment ◽  
Reaction Products ◽  
Wheat Straw Biomass ◽  
Pretreated Biomass

Dipentoses with bicyclic moieties are proposed as new putative cellulase inhibitory reaction products forming during hydrothermal wheat straw biomass pretreatment.

Optimization of Pre-treatment Using RSM on Wheat Straw and Production of Lactic Acid Using Thermotolerant, Inhibitor Tolerant and Xylose Utilizing Bacillus Sonorenesis Strain DGS15

2022 ◽  
Author(s):  
Simarpreet Kaur Chawla ◽  
Dinesh Goyal
Keyword(s):  
Lactic Acid ◽  
Wheat Straw ◽  
Lignocellulosic Biomass ◽  
Fermentation Broth ◽  
Lactic Acid Production ◽  
Reducing Sugar ◽  
Hot Water ◽  
Pre Treatment ◽  
Wheat Straw Biomass ◽  
Pretreated Biomass

Abstract Thermotolerant lactic acid producing bacteria, isolated from red soil of brick kiln was identified by 16S rRNA sequencing as Bacillus sonorenesis , which showed remarkable capability to ferment sugars of lignocellulosic biomass after pre-treatment, yielding 0.97 g/g lactic acid with overall productivity of 0.38 g L -1/ h. RSM was employed to optimize the sulphuric acid pre-treatment combined with dilute NaOH and hot water pre-treatment. Pretreated wheat straw biomass had 40.4% cellulose, 18.4% hemicellulose, 12.4% lignin and 28.2 g L -1 reducing sugar, while native wheat straw biomass had 36% cellulose, 25% hemicellulose, 20% total lignin, and 0.94 g L -1 reducing sugar. Scanning electron microscopy (SEM) revealed that the ordered and compact structure of wheat straw was destroyed upon pre-treatment. X-ray diffractogram (XRD) revealed 9.71% increase in crystallinity index ( CrI ) in pretreated biomass. FTIR spectrogram showed removal of lignin due to reduction of peak at 1640 cm -1 in pretreated biomass. Bacillus sonorenesis DGS15 is inhibitor tolerant (furfural (1.2 g L -1 ) and HMF (2.4 g L -1 )). Furfural was consumed after 72 h of fermentation and HMF got accumulated with 3.75-fold increase in concentration in the fermentation broth. In terms of final concentration, yield, and fermentation duration, this is the best performance of DGS15 for lactic acid production utilizing xylose, glucose as the carbon source. All of these findings showed that the thermotolerant Bacillus sonorenesis strain DGS15 is a novel, attractive candidate for producing lactic acid from lignocellulosic biomass.

Analysis on Active Behavior of Wheat Straw by Py-GC-MS

2012 ◽  
Vol 496 ◽  
pp. 189-193
Author(s):  
Hai Yan Guo ◽  
Zhen Zhen Zheng
Keyword(s):  
Acetic Acid ◽  
Wheat Straw ◽  
Octadecenoic Acid ◽  
Active Behavior ◽  
Wheat Straw Biomass

In order to find out its active behavior, the extractives of wheat straw biomass were adsorbed and determined by Py-GC-MS. And the main constituents were eicosane, stigmasterol, 22,23-dihydro-, .gamma.-sitosterol, stigmasterol, campesterol, nonacosane, stigmast-4-en-3-one, lup-20(29)-en-3-one, 13-tetradecen-1-ol acetate, 1,3-butadiene, 2- methyl-, 9-octadecenoic acid, (e)-, acetic acid, stigmast-5-en-3-ol, oleate, 1-nonadecene, heptacosane, 4,22-stigmastadiene-3-one, 4-((1e)-3-hydroxy-1-propenyl)-2- methoxyphenol, 1-heptene, 2-isohexyl-6-methyl-, etc.

Lignin fate and characterization during ionic liquid biomass pretreatment for renewable chemicals and fuels production

2014 ◽  
Vol 16 (3) ◽  
pp. 1236-1247 ◽  
Author(s):  
Noppadon Sathitsuksanoh ◽  
Kevin M. Holtman ◽  
Daniel J. Yelle ◽  
Trevor Morgan ◽  
Vitalie Stavila ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Enzymatic Hydrolysis ◽  
Wheat Straw ◽  
Loblolly Pine ◽  
Biomass Pretreatment ◽  
Renewable Chemicals

The fate of lignin from wheat straw, Miscanthus, and Loblolly pine after pretreatment by a non-toxic and recyclable ionic liquid (IL), [C2mim][OAc], followed by enzymatic hydrolysis was investigated.

Study on the Formation of Ethyl Levulinate from Wheat Straw Based on a Model Compound

2020 ◽  
Vol 14 (2) ◽  
pp. 273-279
Author(s):  
Zhiyong Chen ◽  
Qian Guan ◽  
Haiyan Xu ◽  
Tingzhou Lei ◽  
Lu Lin ◽  
...  
Keyword(s):  
Reaction Time ◽  
Wheat Straw ◽  
Microcrystalline Cellulose ◽  
Model Compound ◽  
Cellulose Degradation ◽  
Biomass Conversion ◽  
Reaction Products ◽  
Model Compounds ◽  
Ethyl Levulinate ◽  
Change Trend

Glucose and microcrystalline cellulose were selected as model compounds to investigate the formation of ethyl levulinate (EL). Optimal glucose and microcrystalline cellulose transformation conditions resulted in yields of 41.05 wt.% and 38.56 wt.% for EL, 0.73 wt.% and 2.63 wt.% for ethyl-glucoside (EG), 0.42 wt.% and 0.36 wt.% for 5-hydroxymethylfurfural (HMF), and 2.18 wt.% and 2.16 wt.% for 5-ethoxy methyl furfural (EMF), respectively. Increasing the reaction time and temperature resulted in an optimized yield of EL. These increases also resulted in decreased EG and EMF yield, and the change trend of HMF was not significant. EMF, HMF, and EG are intermediates in the formation of EL. Finally, we concluded that biomass conversion occurs first through cellulose degradation to glucose followed by the production of EG through alcoholysis and hydrolysis and dehydration of the reaction products to produce EL.

scholarly journals Physical and calorific properties of wheat straw briquettes and pellets

2019 ◽  
Vol 290 ◽  
pp. 11011
Author(s):  
Cosmin Spirchez ◽  
Aurel Lunguleasa ◽  
Constantin Ionescu ◽  
Catalin Croitoru
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Wheat Straw ◽  
High Performance ◽  
Calorific Value ◽  
Ash Content ◽  
Effective Density ◽  
Final Conclusion ◽  
Density Method ◽  
Wheat Straw Biomass

Wheat straw briquettes are high performance combustible products obtained by densification from the wheat straw biomass without the use of additional adhesives or additives. The purpose of the paper is to analyze and to detail the physical properties (SR EN ISO / CEI 322 for moisture content by method of drying and weighing, and effective density method according to SR EN ISO / CEI 323: 2005) and calorific properties of these briquettes (high and low calorific value according to ÖNORM M7135 using the XRY-1C / China Calorimeter and ash content according to ASTM D1102-84: 2013 and ISO 18122: 2015) and to make a comparison between these briquettes and other briquettes obtained from wooden biomass. The tested briquettes had a moisture content of 8%, an effective density of 1214 kg/m3, a high calorific value of 17.670 MJ/kg, the low of 17.525 MJ/kg and an ash content of 5.6%. All these values correspond to the permissible limits of the standards in the field. The final conclusion of the paper shows that wheat straw briquettes had physical and calorific properties similar to those of wooden biomass.

Wheat straw biomass: A resource for high-value chemicals

2013 ◽  
Vol 49 (1) ◽  
pp. 51-67 ◽  
Author(s):  
Morris Schnitzer ◽  
Carlos M. Monreal ◽  
Erin E. Powell
Keyword(s):  
Wheat Straw ◽  
Wheat Straw Biomass
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