Physical and Chemical Characterization of Agave tequilana Bagasse Pretreated with the Ionic Liquid 1-Ethyl-3-Methylimidazolium Acetate

Equihua-Sánchez, Mintzirani; Barahona-Pérez, Luis Felipe

doi:10.1007/s12649-017-0150-4

Cited by 15 publications

(5 citation statements)

References 55 publications

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“…No signi cant changes were observed, suggesting cellulose retention, which is characteristic of rice husk. However, some bands were reduced after the ionic liquid pretreatment, such as the silicon bonds represented by bands located at 790 cm -1 , C-O stretching bands at 1085 cm -1 , C=O of acetoxy groups in hemicellulose located at 1734 cm -1 (Boukir et al, 2019;Equihua-Sánchez, Barahona-Pérez, 2019), and the lignin aromatic skeletal stretching located at 1423 and 1511 cm -1 (Boonsombuti et al, 2020;Yang and Fang, 2015). These results suggested the removal of silicon, hemicellulose, and lignin.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 94%

Conversion of rice husk biomass into reducing sugars: influence of pretreatment with water and [C16MIM][Br-] ionic liquid

Bohn¹,

Anchieta²,

Kuhn³

et al. 2021

Preprint

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Rice husk is an agricultural lignocellulosic-rich waste which can be used in the production of second-generation ethanol. A biomass pretreatment is necessary to release structural sugars because of the recalcitrance-related properties of lignin and silicon. The use of a long chain imidazolium ionic liquid (IL), 1-hexadecyl-3-methylimidazolium bromide ([C16MIM][Br−]), for rice husk pretreatment is reported for the first time. The influence of the [C16MIM][Br−]:water ratio and temperature on reducing sugars yield was investigated using an experimental design. Structural, chemical, and morphological modifications were observed by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA). Higher temperature (160°C) and lower water content (1:5, IL:water) improved sugar yield. The validation assay (180°C, 1:20 IL:water ratio, 10% (w/v) of biomass, 12 h) resulted in 38% yield of reducing sugars and 60% dissolution of biomass, whereas untreated biomass showed only 0.18% yield of reducing sugars. The characterization analysis confirmed the changes in rice husk structure and morphology after pretreatment with IL. Rice husk pretreatment with [C16MIM][Br−] resulted in a higher concentration of reducing sugars compared to untreated biomass. Therefore, solid ionic liquids combined with water could be used as an alternative solvent for lignocellulosic biomass pretreatment.

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Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 94%

Conversion of rice husk biomass into reducing sugars: influence of pretreatment with water and [C16MIM][Br-] ionic liquid

Bohn¹,

Anchieta²,

Kuhn³

et al. 2021

Preprint

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“…A decrease in cellulose crystallinity was also observed. [43] Agave durangensis leaves Ultrasound pretreatment (42 kHz, 132 W, 60 min) or autoclaving at 120 • C for 60 min. Phenolic compounds were analyzed by HPLC.…”

Section: Agave Tequilana Bagassementioning

confidence: 99%

“…Ionic liquids (IL), especially 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]), have also been used as pretreatments for delignification and xylan removal. With this method, the cellulose from the agave bagasse becomes less crystalline, facilitating the further saccharification process [43] due to the lower content of lignin and xylan that reduce the recalcitrance. Waste from the tequila industry, mainly agave bagasse, has been pretreated with [C2mim][OAc] in varying concentrations [27,[42][43][44].…”

Section: Agave Angustifolia Hawmentioning

confidence: 99%

“…With this method, the cellulose from the agave bagasse becomes less crystalline, facilitating the further saccharification process [43] due to the lower content of lignin and xylan that reduce the recalcitrance. Waste from the tequila industry, mainly agave bagasse, has been pretreated with [C2mim][OAc] in varying concentrations [27,[42][43][44]. Temperature was within the main factors affecting the lignin reduction: up to 45% at 160 • C (15% bagasse/[C2mim][OAc]) [43], and up to 16% at 120 • C (10% bagasse/[C2mim][OAc]) [44], both for 3 h.…”

Section: Agave Angustifolia Hawmentioning

confidence: 99%

“…Waste from the tequila industry, mainly agave bagasse, has been pretreated with [C2mim][OAc] in varying concentrations [27,[42][43][44]. Temperature was within the main factors affecting the lignin reduction: up to 45% at 160 • C (15% bagasse/[C2mim][OAc]) [43], and up to 16% at 120 • C (10% bagasse/[C2mim][OAc]) [44], both for 3 h.…”

Section: Agave Angustifolia Hawmentioning

confidence: 99%

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Agave By-Products: An Overview of Their Nutraceutical Value, Current Applications, and Processing Methods

et al. 2021

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Agave, commonly known as “maguey” is an important part of the Mexican tradition and economy, and is mainly used for the production of alcoholic beverages, such as tequila. Industrial exploitation generates by-products, including leaves, bagasse, and fibers, that can be re-valorized. Agave is composed of cellulose, hemicellulose, lignin, fructans, and pectin, as well as simple carbohydrates. Regarding functional properties, fructans content makes agave a potential source of prebiotics with the capability to lower blood glucose and enhance lipid homeostasis when it is incorporated as a prebiotic ingredient in cookies and granola bars. Agave also has phytochemicals, such as saponins and flavonoids, conferring anti-inflammatory, antioxidant, antimicrobial, and anticancer properties, among other benefits. Agave fibers are used for polymer-based composite reinforcement and elaboration, due to their thermo-mechanical properties. Agave bagasse is considered a promising biofuel feedstock, attributed to its high-water efficiency and biomass productivity, as well as its high carbohydrate content. The optimization of physical and chemical pretreatments, enzymatic saccharification and fermentation are key for biofuel production. Emerging technologies, such as ultrasound, can provide an alternative to current pretreatment processes. In conclusion, agaves are a rich source of by-products with a wide range of potential industrial applications, therefore novel processing methods are being explored for a sustainable re-valorization of these residues.

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Conversion of rice husk into reducing sugars: influence of pretreatment with water and [C16MIM][Br−] ionic liquid

Bohn

Anchieta

Kuhn

et al. 2022

Clean Techn Environ Policy

View full text Add to dashboard Cite

Physical and Chemical Characterization of Agave tequilana Bagasse Pretreated with the Ionic Liquid 1-Ethyl-3-Methylimidazolium Acetate

Cited by 15 publications

References 55 publications

Conversion of rice husk biomass into reducing sugars: influence of pretreatment with water and [C16MIM][Br-] ionic liquid

Conversion of rice husk biomass into reducing sugars: influence of pretreatment with water and [C16MIM][Br-] ionic liquid

Agave By-Products: An Overview of Their Nutraceutical Value, Current Applications, and Processing Methods

Conversion of rice husk into reducing sugars: influence of pretreatment with water and [C16MIM][Br−] ionic liquid

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