Improvement of biomass properties by pretreatment with ionic liquids for bioconversion process

Weerachanchai, Piyarat; Leong, Susanna Su Jan; Chang, Matthew Wook; Ching, Chi Bun; Lee, Jongmin

doi:10.1016/j.biortech.2012.02.023

Cited by 110 publications

(52 citation statements)

References 22 publications

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“…Addition of water in the cause of ILbiomass reaction improves cellulose hydrolysis by increasing selectivity to glucose and cellobiose [187]. If antisolvent mixtures such as water/acetone are used, then cellulose and lignin are distinctly separated through dissolution in water and acetone, respectively [170,188].…”

Section: Process Description and Mechanismmentioning

confidence: 99%

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Bensah

Mensah

2013

International Journal of Chemical Engineering

268

105

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Pretreatment of lignocellulose has received considerable research globally due to its influence on the technical, economic and environmental sustainability of cellulosic ethanol production. Some of the most promising pretreatment methods require the application of chemicals such as acids, alkali, salts, oxidants, and solvents. Thus, advances in research have enabled the development and integration of chemical-based pretreatment into proprietary ethanol production technologies in several pilot and demonstration plants globally, with potential to scale-up to commercial levels. This paper reviews known and emerging chemical pretreatment methods, highlighting recent findings and process innovations developed to offset inherent challenges via a range of interventions, notably, the combination of chemical pretreatment with other methods to improve carbohydrate preservation, reduce formation of degradation products, achieve high sugar yields at mild reaction conditions, reduce solvent loads and enzyme dose, reduce waste generation, and improve recovery of biomass components in pure forms. The use of chemicals such as ionic liquids, NMMO, and sulphite are promising once challenges in solvent recovery are overcome. For developing countries, alkalibased methods are relatively easy to deploy in decentralized, low-tech systems owing to advantages such as the requirement of simple reactors and the ease of operation.

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Section: Process Description and Mechanismmentioning

confidence: 99%

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Bensah

Mensah

2013

International Journal of Chemical Engineering

268

105

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“…IL-pretreated sample showed a sugar yield of 78.0% at 70 °C for 24 h (Xu et al 2012). Cassava pulp residue and rice straw were successfully pretreated with an ionic liquid of 1-ethyl-3-methylimidazolium acetate at 120 °C for 24 h (Weerachanchai et al 2012). The effectiveness of ionic liquids for both types of samples were: 1-ethyl-3-methylimidazolium acetate > 1-ethyl-3-methylimidazolium diethyl phosphate > 1,3-dimethylimidazolium methyl sulfate.…”

Section: Fig 2 Pretreatment Regeneration and Fractionation Of Biomentioning

confidence: 92%

“…The effectiveness of ionic liquids for both types of samples were: 1-ethyl-3-methylimidazolium acetate > 1-ethyl-3-methylimidazolium diethyl phosphate > 1,3-dimethylimidazolium methyl sulfate. The increase of temperature from 25 to 120 °C and decrease of particle size were favorable for the overall extraction process, leading to higher sugar and lignin yield with reduced crystallinity index (Weerachanchai et al 2012). Wheat straw was pretreated with the aqueous ionic liquid, 1-ethyl-3-methylimidazolium acetate, and the investigated variables were temperature (130 to 170 °C), time (0.5 to 5.5 h), and ionic liquid concentration (0 to 100%).…”

Section: Fig 2 Pretreatment Regeneration and Fractionation Of Biomentioning

confidence: 99%

Catalytic Role of Ionic Liquids for Dissolution and Degradation of Biomacromolecules

Chowdhury¹,

Zain²,

Hamid³

et al. 2014

BioResources

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Natural biomacromolecules constitute a diverse feedstock, including carbohydrate-based polysaccharides (cellulose, hemicellulose, starch, agarose, and Konjac glucomannan) together with lignin -extracted mainly from biomass -and other protein based polymers, namely keratin, chitin, chitosan, and silk fibroin. The complex and heterogeneous chemical structure of biomacromolecules makes them difficult to dissolve and disintegrate into simpler molecules for further applications. In this regard, ionic liquids are potential solvents for the dissolution and modification of long chain biopolymers. This provides a promising pretreatment technology and is known to allow adequate extraction of biopolymers from natural sources. This paper highlights the properties of ionic liquids for their use as versatile solvents. This review provides a critical outlook regarding the influence of several process parameters that govern the fractionation of biomacromolecules into their constituent elements and further pretreatment processes. The performance of different types of ionic liquids for processing of biomacromolecules, focusing on their pertinent capability as catalysts to enhance the rate of hydrolysis, also is discussed in this article.

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“…Previous studies showed that the larger size particle possesses lower bulk density therefore it requires more amount of ionic liquid contacting larger volume of biomass to achieve the same effectiveness with that of smaller size particle [32]. Moreover, the higher crystallinity index of untreated biomasses with larger size particles (Fig.…”

Section: Impact On Chemical Composition and Enzyme Digestibilitymentioning

confidence: 93%

“…However, in an industrial process, the biomass loading and particle size along with recovery of the IL and time of pretreatment are critical factors accounting for the cost of the process, therefore in order to optimize the pretreatment process for a particular IL and biomass combination, these parameters need to be studied in detail [30]. The previous reports on the effects of particle size reduction on the enzymatic digestibility have shown increases in the hydrolysis rate upon size reduction [31,32].…”

Section: Introductionmentioning

confidence: 99%

Studies to optimize the process of biofuel production from castor stalk

Kotia

Vijayaraghavan

Rangaswamy

et al. 2017

Pure and Applied Chemistry

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Lignocellulosic biomass is a rich source of cellulose and one of the most promising raw materials for the production of biofuels and other value added chemicals. However, its high lignin content and complex cellular structure represent a significant processing challenge. In this work, the effect of pretreatment using [EMIM][Ac] was studied at various process parameters in order to develop a cost-effective process. In order to minimize the loss of sugars in this process bulk of the solids, comprising both regenerated cellulose and undissolved particles were subjected to the enzymatic hydrolysis. Up to 96 % enzymatic digestibility was achieved, even with relatively coarse particle sizes (0.6-1.0 mm range), at 10 % biomass loading. The enhanced digestibility of CS is attributed to reduction in lignin content, crystallinity of the cellulose coupled with an increase in surface area.

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Improvement of biomass properties by pretreatment with ionic liquids for bioconversion process

Cited by 110 publications

References 22 publications

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Catalytic Role of Ionic Liquids for Dissolution and Degradation of Biomacromolecules

Studies to optimize the process of biofuel production from castor stalk

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