Homolytic and Heterolytic Cleavage of β-Ether Linkages in Hardwood Lignin by Steam Explosion

Obame, Sébastien Ngwa; Ziegler-Devin, Isabelle; Safou-Tchima, Rodrigue; Brosse, Nicolas

doi:10.1021/acs.jafc.9b01744

Cited by 40 publications

(38 citation statements)

References 24 publications

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“…Steam explosion pretreatment is a simple, low-cost, and environmentally friendly technology that causes the depolymerization of hemicellulose and lignin into soluble oligomers, taking advantage of its high-temperature profile [ 5 ]. Thus, steam explosion facilitates the breakdown of lignocellulosic biomass structure [ 6 , 7 ] and has been used to apply their end products to a variety of purposes such as feed [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Dietary Supplementation of Shredded, Steam-Exploded Pine Particles Decreases Pathogenic Microbes in the Cecum of Acute Heat-Stressed Broilers

Goel

Kim

Ncho

et al. 2021

Animals

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The gut microbiome stimulates nutrient metabolism and could effectively generate heat tolerance in chickens. This study investigates the effects of dietary steam-exploded pine particle (SPP) supplementation and subsequent acute heat stress on productive performance and cecum microbiome in broilers. Eight-day Ross 308 broilers were distributed in three groups with 0%, 1%, and 2% SPP in diets. On the 41st day, forty birds were allocated to four groups with ten birds each. The treatments were control diet at thermoneutral temperature (0% NT) and acute heat-stressed (HS) birds fed control (0% HS), 1% (1% HS), and 2% (2% HS) SPP. Parameters recorded were body weight (BW), feed intake (FI), rectal temperature (RT), relative organ weight, and metagenome analysis from cecum samples. Percent difference in BW, FI, and RT was decreased in HS birds. Metagenome analysis revealed similar richness and diversity in microbial communities. The relative abundance of the bacterial genus such as Limosilactobacillus, Drancourtella, and Ihubacter was increased while that of Alistipes, Alkalibacter, Lachnotalea, and Turicibacter was decreased in SPP supplemented HS birds. Concludingly, the production performance of broilers is negatively influenced during HS, and 2% dietary SPP supplementation may reduce the adverse effects of HS by modifying the microbiota in chickens.

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Section: Introductionmentioning

confidence: 99%

Dietary Supplementation of Shredded, Steam-Exploded Pine Particles Decreases Pathogenic Microbes in the Cecum of Acute Heat-Stressed Broilers

Goel

Kim

Ncho

et al. 2021

Animals

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“…13 The relocation of lignin in form of beads at the surface of the cellulose fibers has observed by several authors. 14,15 It is known that acidic biomass pre-impregnation prior to SE further improved the degradation extent for hemi-cellulose, the lignin depolymerization through β−O−4 scissions and efficiency of SE treatment. 16,17,18 In the current industrial approaches most of the lignin is not isolated after the steam explosion step but at the end of the whole process after the ethanol recovery.…”

Section: Introductionmentioning

confidence: 99%

Lignin-First Integrated Steam Explosion Process for Green Wood Adhesive Application

Ziegler-Devin

Chrusciel

et al. 2020

ACS Sustainable Chem. Eng.

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Steam explosion (SE) is one of the most advanced pretreatment processes currently used for the production of biofuel from lignocellulose. However, steam explosion lignin is generally recovered as a secondary impure co-product, mainly used for energy production. In this work, beech wood sawdust was first exploded at 180°C or 200°C during 5 min after water or dilute acid impregnation. The recovery of lignin from exploded wood was studied using an alkali process at 80°C or an ethanol-organosolv process at 200°C. The impact of the SE parameters and of the delignification step on the lignin structure was examined by size exclusion and ionic chromatography (SEC), 31 P and HSQC NMR spectroscopies. The different lignin 2 fractions have been evaluated for the production of adhesive without addition of any synthetic resin, composed of 50% glyoxalated lignin and 50% tannins. It was demonstrated by thermomechanical analysis (TMA) that the parameters of the process greatly impact the performance of the resulting resin. SE lignin produced from acid SE (a-SE) treatment at 200°C followed by an alkaline delignification led to an adhesive formulation displaying a very good performance with MOE max ≈ 6000 MPa.

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“…Equation 5: Calculation of a Combined severity Factor. Other applications than hemicelluloses hydrolysis have also been reported including SE lignin extraction (Zhang et al, 2019;Obame et al, 2019), carboxylic acids and pellets production (Sharma and Dubey, 2020). This model has also been used to predict the reactivity of biomass using different pretreatment technologies such as organosolv (Goh et al, 2011), dilute acid (Ilanidis et al, 2021) or alkaline treatment (Wang et al, 2021).…”

Section: Csf Log S °− Ph (5)mentioning

confidence: 99%

“…The two parameters time and temperature being correlated, severity factors which combined them have been proposed in the literature. These factors are currently broadly employed in order to facilitate the control and the optimization of the SE process ( Overend and Chornet, 1987 ; Fockink et al, 2018 ; Bonfiglio et al, 2019 ; Obame et al, 2019 ). However, these factors are based on semi-empirical kinetic approaches and assumptions that require discussion and clarification.…”

Section: Introductionmentioning

confidence: 99%

Steam Explosion Pretreatment of Lignocellulosic Biomass: A Mini-Review of Theorical and Experimental Approaches

2021

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Steam Explosion (SE) is one of the most efficient and environmentally friendly processes for the pretreatment of lignocellulosic biomass. It is an important tool for the development of the biorefinery concept to mitigate the recalcitrance of biomass. However, the two distinct steps of SE, steam cracking and explosive decompression, leading to the breakdown of the lignocellulosic matrix have generally been studied in empiric ways and clarification are needed. This mini-review provides new insights and recommendations regarding the properties of subcritical water, process modeling and the importance of the depressurization rate.

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Homolytic and Heterolytic Cleavage of β-Ether Linkages in Hardwood Lignin by Steam Explosion

Cited by 40 publications

References 24 publications

Dietary Supplementation of Shredded, Steam-Exploded Pine Particles Decreases Pathogenic Microbes in the Cecum of Acute Heat-Stressed Broilers

Dietary Supplementation of Shredded, Steam-Exploded Pine Particles Decreases Pathogenic Microbes in the Cecum of Acute Heat-Stressed Broilers

Lignin-First Integrated Steam Explosion Process for Green Wood Adhesive Application

Steam Explosion Pretreatment of Lignocellulosic Biomass: A Mini-Review of Theorical and Experimental Approaches

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