Lignins from enzymatic hydrolysis and alkaline extraction of steam refined poplar wood: Utilization in lignin-phenol-formaldehyde resins

2016 ◽  
Vol 85 ◽  
pp. 300-308 ◽  
Author(s):  
Alexander Stücker ◽  
Fokko Schütt ◽  
Bodo Saake ◽  
Ralph Lehnen
Keyword(s):  
Enzymatic Hydrolysis ◽  
Phenol Formaldehyde ◽  
Alkaline Extraction ◽  
Poplar Wood ◽  
Wood Utilization

Optimization of steam pretreatment conditions for enzymatic hydrolysis of poplar wood

Holzforschung ◽  
2011 ◽  
Vol 65 (4) ◽  
Author(s):  
Fokko Schütt ◽  
Jürgen Puls ◽  
Bodo Saake
Keyword(s):  
Enzymatic Hydrolysis ◽  
Raw Material ◽  
Steam Pretreatment ◽  
Alkaline Extraction ◽  
Poplar Wood ◽  
Steam Refining ◽  
Severity Factor ◽  
Short Rotation ◽  
Pretreatment Conditions ◽  
Hydrolysis Of

Abstract Steam refining was investigated as a pretreatment for enzymatic hydrolysis of poplar wood from a short rotation plantation. The experiments were carried out without debarking to use an economically realistic raw material. Steam refining conditions were varied in the range of 3–30 min and 170–220°C, according to a factorial design created with the software JMP from SAS Institute Inc., Cary, NC, USA. Predicted steaming conditions for highest glucose and xylose yields after enzymatic hydrolysis were at 210°C and 15 min. Control tests under the optimized conditions verified the predicted results. Further pretreatments without bark showed that the enzymes were not significantly inhibited by the bark. The yield of glucose and xylose was 61.9% of theoretical for the experiments with the whole raw material, whereas the yield for the experiments without bark was 63.6%. Alkaline extraction of lignin from the fibers before enzymatic hydrolysis resulted in an increase of glucose yields from mild pretreated fibers and a decrease for severe pretreated fibers. The extracted lignin had a high content of xylose of up to 14% after very mild pretreatments. On the other hand, molecular weights of the extracted lignin increased substantially after pretreatments with a severity factor above 4. Hence, alkaline extraction of the lignin seems only attractive in a narrow range of steaming conditions.

Changes in poplar (Populus trichocarpa) wood porous structure after liquid hot water (LHW) pretreatment

2020 ◽  
Vol 112 ◽  
pp. 71-78
Author(s):  
Florentyna Akus-Szyblerg ◽  
Jan Szadkowski ◽  
Andrzej Antczak ◽  
Janusz Zawadzki
Keyword(s):  
Enzymatic Hydrolysis ◽  
Porous Structure ◽  
Populus Trichocarpa ◽  
Hot Water ◽  
Size Exclusion ◽  
Bioethanol Production ◽  
Poplar Wood ◽  
Liquid Hot Water ◽  
Exclusion Chromatography ◽  
Pretreatment Conditions

Changes in poplar (Populus trichocarpa) wood porous structure after liquid hot water (LHW) pretreatment. The aim of this research was to investigate the effect of applying different hydrothermal pretreatment conditions on the porous structure of poplar wood. Porosity is recognised as an important factor considering efficiency of an enzymatic hydrolysis as a step of bioethanol production. Native poplar wood as well as solid fractions after pretreatment performed at different temperatures (160 °C, 175 °C and 190 °C) were analysed. Porous structure was examined with an inverse size-exclusion chromatography (ISEC) method. Results indicated a significant development of the porous structure of the biomass with increasing porosity along with the growing temperature of the LHW process. The temperature of 190 °C was chosen as the most promising condition of poplar wood LHW pretreatment in terms of the efficiency of the subsequent steps of bioethanol production. The obtained results were consistent with the previous experimental data procured during analysis of the LHW pretreated poplar wood and its subsequent enzymatic hydrolysis yield.

Effects of cutting orientation in poplar wood biomass size reduction on enzymatic hydrolysis sugar yield

2015 ◽  
Vol 194 ◽  
pp. 407-410 ◽  
Author(s):  
Meng Zhang ◽  
Xiaohui Ju ◽  
Xiaoxu Song ◽  
Xiao Zhang ◽  
Z.J. Pei ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Sugar Yield ◽  
Size Reduction ◽  
Poplar Wood ◽  
Wood Biomass

scholarly journals Structural changes of poplar wood lignin after supercritical pretreatment using carbon dioxide and ethanol–water as co-solvents

RSC Advances ◽  
2017 ◽  
Vol 7 (14) ◽  
pp. 8314-8322 ◽  
Author(s):  
Xing Wang ◽  
Yanzhu Guo ◽  
Jinghui Zhou ◽  
Guangwei Sun
Keyword(s):  
Carbon Dioxide ◽  
Enzymatic Hydrolysis ◽  
Structural Changes ◽  
Hydrolysis Lignin ◽  
Poplar Wood

To delineate structural changes of lignin after SCEP, enzymatic hydrolysis lignin (EHL) in poplar chips, lignin in pretreated residues (SCEP-RL), lignin in liquors (SCEP-DL) were isolated and analyzed by GPC, 13C-, 31P-, 2D-HSQC-NMR and TGA.

Development of Oriented Strand Board (OSB) Using Phenol Formaldehyde Adhesive

2014 ◽  
Vol 37 (2) ◽  
pp. 157-160
Author(s):  
Sagrika Behera ◽  
Seema Bhatt ◽  
Sneha Dobhal
Keyword(s):  
Bonding Strength ◽  
Oriented Strand Board ◽  
Phenol Formaldehyde ◽  
Solid Wood ◽  
Resin Content ◽  
Modulus Of Rupture ◽  
Internal Bonding ◽  
Poplar Wood ◽  
Screw Withdrawal ◽  
Internal Bonding Strength

Oriented strand board (OSB) was prepared using poplar wood with different resin content of phenol formaldehyde. It was observed that modulus of rupture and screw withdrawal of face and edge was more in oriented strand board as compare to solid wood. Internal bonding strength was very less in oriented strand board as compare to solid wood. It was also observed that most of the properties improve with increase in resin content.

Effect of Inhibitors Released during Steam-Explosion Treatment of Poplar Wood on Subsequent Enzymatic Hydrolysis and SSF

2008 ◽  
Vol 20 (1) ◽  
pp. 200-206 ◽  
Author(s):  
Maria Cantarella ◽  
Laura Cantarella ◽  
Alberto Gallifuoco ◽  
Agata Spera ◽  
Francesco Alfani
Keyword(s):  
Enzymatic Hydrolysis ◽  
Steam Explosion ◽  
Poplar Wood ◽  
Effect Of Inhibitors

Preparation and characterization of novolac phenol–formaldehyde resins with enzymatic hydrolysis lignin

2015 ◽  
Vol 54 ◽  
pp. 178-182 ◽  
Author(s):  
Zhou Jing ◽  
Hu Lihong ◽  
Liang Bingchuan ◽  
Bo Caiying ◽  
Jia Puyou ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Phenol Formaldehyde ◽  
Hydrolysis Lignin
Sign in / Sign up

Export Citation Format

Share Document