Pretreatment of oil palm trunk in deep eutectic solvent and optimization of enzymatic hydrolysis of pretreated oil palm trunk

Zulkefli, Syarilaida; Abdulmalek, Emilia; Rahman, Mohd Basyaruddin Abdul

doi:10.1016/j.renene.2017.01.037

Cited by 117 publications

(25 citation statements)

References 33 publications

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“…All the effectively pretreated samples had lower hemicellulose and lignin content compared to the relevant raw biomass, resulting in a corresponding increase in the relative cellulose fraction. This outcome has also been reported in previous studies where hemicellulose and lignin were successfully removed from untreated samples for various types of biomass pretreatment using DES [26,30,[42][43][44]. However, our previous study on solubilities of individual lignocellulosic components in DES showed that FA:CC, and AA:CC don't dissolve significant amounts of xylan [32].…”

Section: Fiber Analysissupporting

confidence: 85%

Secondary Agriculture Residues Pretreatment Using Deep Eutectic Solvents

Kumar

Gautam

Stallings

et al. 2020

Waste Biomass Valor

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The purpose of this work is to investigate a new class of solvents for separating secondary agricultural residues, which have already been transported to processing centers, into individual biomass components. Using biocompatible deep eutectic solvents (DES) on secondary agricultural residues could valorize these wastes into bioproducts by separating lignin from cellulose. DES pretreatment to achieve this separation involves chemicals that are less hazardous for the environment than other pretreatments. Methods Five deep eutectic solvents that are biocompatible have been investigated for their ability to deconstruct rice hulls and sugarcane bagasse. Mass yield, enzymatic hydrolysis of the pretreated biomass, fiber analysis, pKa analysis and Fourier transform infrared spectroscopy (FTIR) were performed to explore the effect of the DES on these secondary agricultural residues. Results Experimental results confirmed that the DES formic acid:choline chloride (FA:CC), lactic acid:choline chloride, and acetic acid:choline chloride were effective in removing lignin, thus concentrating cellulose in both pretreated biomass. Addition of water precipitated lignin from the spent DES, as confirmed by FTIR. However, the higher pKa DES lactic acid:betaine and lactic acid:proline had little effect on rice hulls or sugarcane bagasse. FA:CC was the most effective of the DES tested in preparing the biomass for enzymatic saccharification. All the effectively pretreated samples had higher inorganic content compared to the relevant raw biomass. Conclusions DES with stronger acidity (lower pKa) were found to be more efficient for delignification, leading to higher glucose yield. Further work is required to determine how inorganics affect waste biomass pretreatment.

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Section: Fiber Analysissupporting

confidence: 85%

Secondary Agriculture Residues Pretreatment Using Deep Eutectic Solvents

Kumar

Gautam

Stallings

et al. 2020

Waste Biomass Valor

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“…The intrinsic ionic nature produces the breaking of the supramolecular H-bond, which stabilizes the hemicellulose-lignin complex in lignocellulosic biomasses, allowing the covalent bond to be broken more easily. In this way, the different components can also be reorganized under very mild conditions without generating possible inhibitors to the following depolymerization of cellulose to produce glucose [54]. DES pretreatment has been frequently used to fractionate the biomass [55,56], especially to solubilize and remove the lignin [57], leaving a residual cellulose-rich substrate more prone to be hydrolysed via enzymatic action than the starting lignocellulosic biomass [58] (Figure 7).…”

Section: Use Of Des For the Treatment Of Lignocellulosic Biomassmentioning

confidence: 99%

Deep Eutectic Solvents for the Valorisation of Lignocellulosic Biomasses towards Fine Chemicals

Scelsi

Angelini

Pastore

2021

Biomass

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The growing demand for energy and materials in modern society pushes scientific research to finding new alternative sources to traditional fossil feedstocks. The exploitation of biomass promises to be among the viable alternatives with a lower environmental impact. Making biomass exploitation technologies applicable at an industrial level represents one of the main goals for our society. In this work, the most recent scientific studies concerning the enhancement of lignocellulosic biomasses through the use of deep eutectic solvent (DES) systems have been examined and reported. DESs have an excellent potential for the fractionation of lignocellulosic biomass: the high H-bond capacity and polarity allow the lignin to be deconvolved, making it easier to break down the lignocellulosic complex, producing a free crystallite of cellulose capable of being exploited and valorised. DESs offer valid alternatives of using the potential of lignin (producing aromatics), hemicellulose (achieving furfural) and cellulose (delivering freely degradable substrates through enzymatic transformation into glucose). In this review, the mechanism of DES in the fractionation of lignocellulosic biomass and the main possible uses for the valorisation of lignin, hemicellulose and cellulose were reported, with a critical discussion of the perspectives and limits for industrial application.

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“…However, other crops are also prominent, such as wheat, cassava, rice, banana, and oil palm. Processing these crops generates large amounts of solid residues, including in‐field or agricultural residues (straw, leaves, and foliage) and agro‐industrial processing residues (bagasse, bunches, and shells) with diverse composition and volume (Table ) …”

Section: The Agro‐industrial Residues In South Americamentioning

confidence: 99%

Lignocellulosic biomass from agro‐industrial residues in South America: current developments and perspectives

Magalhães

Carvalho

Pereira

et al. 2019

Biofuels Bioprod Bioref

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South America is a pivotal supplier of agricultural commodities for a growing world population. This large-scale production generates a substantial amount of lignocellulosic residue. Inadequate disposal of this material can lead to putrefaction and leaching, and can attract insects and rodents. Solid residues can be treated by incineration or composting -both causing greenhouse gas emissions. Biotransformation of lignocellulosic residues into valuable products has been proposed as a more sophisticated alternative to burning. However, pretreatment steps are necessary to obtain fermentable sugars for biological or thermochemical transformation into value-added products. In this review, we noted trends in lignocellulosic biomass generation and potential uses, with special attention to the procedures necessary for the generation of fermented products and bio-oil. This survey pointed out that sugarcane bagasse, cereal straws, bananas, and oil-palm biomass can generate about 900 million tonnes of biomass by 2025. Based on production data from several researchers it was estimated that these raw materials have the potential for annual production of more than 550 million tonnes of fermentable sugars (i.e., glucose and xylose), 670 million tonnes of bio-oil, or 4000 TWh of thermal energy. We describe procedures and strategies for the conversion of these residues to produce higher value-added biomolecules and to promote more sustainable application of lignocellulosic biomass

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Pretreatment of oil palm trunk in deep eutectic solvent and optimization of enzymatic hydrolysis of pretreated oil palm trunk

Cited by 117 publications

References 33 publications

Secondary Agriculture Residues Pretreatment Using Deep Eutectic Solvents

Secondary Agriculture Residues Pretreatment Using Deep Eutectic Solvents

Deep Eutectic Solvents for the Valorisation of Lignocellulosic Biomasses towards Fine Chemicals

Lignocellulosic biomass from agro‐industrial residues in South America: current developments and perspectives

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