Recyclability of an ionic liquid for biomass pretreatment

Weerachanchai, Piyarat; Lee, Jongmin

doi:10.1016/j.biortech.2014.06.072

Cited by 91 publications

(60 citation statements)

References 31 publications

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“…[14][15][16][17] It is essentially based on dissolution of cellulose in ILs. 8,[20][21][22][23] Among the various ILs that have been tested for biomass pretreatment, 1-ethyl-3methylimidazolium acetate (EmimAc) is one of the mostly investigated ILs and has been shown to be able to handle a variety of biomasses. 14,16 Studies of compatibility between ILs, enzymes and microbes, as well as IL recycling have also been carried out.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of pretreatment with dimethyl sulfoxide and an ionic liquid on enzymatic digestibility of white poplar and pine

Zhang

Zhao

et al. 2016

RSC Adv.

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A systematic study on the interactions between dimethyl sulfoxide (DMSO) and an ionic liquid (IL), 1-ethyl-3-methylimidazolium acetate (EmimAc), during lignocellulosic biomass pretreatment was performed. In this work, the ratio of biomass to EmimAc was fixed at 5 and 10 wt% while different amounts of DMSO were added to EmimAc: 0, 14, 32, 58, 72, 90, 95 and 100 wt%. This enabled a mechanistic understanding of the role of DMSO in IL pretreatment. While enhanced cellulose dissolution upon addition of DMSO was suggested by the XRD data, significantly higher concentrations of DMSO however retarded cellulose dissolution. The effects of DMSO on biomass pretreatment were discussed. Importantly, total sugar conversion of pretreated biomass samples showed a dependence on DMSO concentration, demonstrating the feasibility of using high concentrations of DMSO for efficient biomass pretreatment.This dependence was correlated with cellulose I lattice distortion or transformation during biomass pretreatment. Insights into the interactions between DMSO, EmimAc and biomass were revealed.

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Section: Introductionmentioning

confidence: 99%

Synergistic effect of pretreatment with dimethyl sulfoxide and an ionic liquid on enzymatic digestibility of white poplar and pine

Zhang

Zhao

et al. 2016

RSC Adv.

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“…. Surprisingly, the enzymatic efficiency increased gradually with the increase of reuse cycles, and achieved a maximum of 100.5% at the fourth batch, which was different from previous sudies showing that sugar yield reduced gradually as the number of IL recycles was increased . It can be seen from the composition analysis that the cellulose content increased to more than 58% and the lignin content declined to 5.5% with the recycling of IL (data not shown).…”

Section: Resultsmentioning

confidence: 99%

Improved enzymatic hydrolysis and ethanol production by combined alkaline peroxide and ionic liquid‐water mixtures pretreatment of rice straw

Hong

Wang²,

Zhu³

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Rice straw (RS), one of the most plentiful lignocellulosic wastes worldwide, has been considered a potential candidate to produce bioethanol. The object of this work was to develop an efficient and feasible pretreatment process for RS with alkaline peroxide combined with ionic liquid (IL)–water mixtures, reveal the mechanism, and achieve biomass valorization. RESULTS Alkaline peroxide pretreatment under mild conditions combined with IL–water mixtures pretreatment at a water content of 30 wt% was established, leading to a maximum lignin removal of 63.8% with an enzymolysis efficiency of 92.1% and a simultaneous saccharification and co‐fermentation efficiency of 91.0%. Furthermore, the recycled IL also showed good performance with the established pretreatment process, resulting in 251.6 g L−1 of reducing sugar and 91.9 g L−1 ethanol at high solid loading. The alkaline peroxide pretreatment enhanced lignin extraction and disrupted the RS structure to facilitate the dissolution of amorphous components by the IL–water mixtures. CONCLUSION A simple and efficient pretreatment was successfully established. The IL was successfully recycled for further pretreatments, and high concentrations of reducing sugars and ethanol were achieved using the pretreated RS. The effectiveness of the pretreatment process suggested potential application in future biorefineries. © 2018 Society of Chemical Industry

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“…Catalysts used in gasification processes can be categorized into natural catalysts and synthetic catalysts [46,47]. Among natural catalysts, dolomite and olivine are the most widely investigated catalysts (Fig.…”

Section: Key Process Parameters In Biomass Gasification Technologiesmentioning

confidence: 99%

“…The former catalysts are applied for their large capacity to enhance gasification rates. Nevertheless, these catalysts are more expensive than the natural ones, they might agglomerate at high temperatures and they are difficult to recover, increasing even further the costs of the gasification process [14,46,47,53]. Nickelbased catalysts have been widely used due to their high activity for steam reforming of hydrocarbons and tars at relatively low temperatures and due to the fact that they lead to high percentages of H2 and CO in the gas mixtures.…”

Section: Key Process Parameters In Biomass Gasification Technologiesmentioning

confidence: 99%

Gasification of Biomass to Second Generation Biofuels: A Review

Güell¹,

Sandquist²,

Sørum

2012

Journal of Energy Resources Technology

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Norway Biomass gasification has gained significant attention in the last couple of decades for the production of heat, power, and second generation biofuels. Biomass gasification processes are highly complex due to the large number of reactions involved in the overall process as well as the high sensitivity of the process to changes in the operational conditions. This report reviews the state-of-theart of biomass gasification by evaluating key process parameters such as gasifying agent, temperature, pressure, particle size, etc., for fluidized bed and entrained flow gasifiers. The pros and cons of each technology and the remaining bottlenecks are also addressed, [DOI: 10.1115/1.4007660] Recently, Cao et al. [16] developed a novel two-stage fluidized bed air gasification process for several mixed wood sawdust samples. As illustrated in Fig. 1 and described in detail in Ref. [16], the gasification process consisted of an initial region where tar decomposition occurred, followed by a second sand fluidized bed region at the bottom of the gasifier where char was partially Journal of Energy Resources Technology

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Recyclability of an ionic liquid for biomass pretreatment

Cited by 91 publications

References 31 publications

Synergistic effect of pretreatment with dimethyl sulfoxide and an ionic liquid on enzymatic digestibility of white poplar and pine

Synergistic effect of pretreatment with dimethyl sulfoxide and an ionic liquid on enzymatic digestibility of white poplar and pine

Improved enzymatic hydrolysis and ethanol production by combined alkaline peroxide and ionic liquid‐water mixtures pretreatment of rice straw

Gasification of Biomass to Second Generation Biofuels: A Review

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