Supercritical ethanol as an enhanced medium for lignocellulosic biomass liquefaction: Influence of physical process parameters

Brand, Steffen; Susanti, Ratna Frida; Kim, Seok Ki; Lee, Minsoo; Kim, Jae-Hoon; Sang, Byoung In

doi:10.1016/j.energy.2013.06.049

Cited by 175 publications

(86 citation statements)

References 39 publications

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“…It should be noted that ethane was found to be the dominant fraction in the gas. The similar result was observed by Brand et al in the liquefaction of lignocellulose with ethanol as the medium [27]. The ethane and ethene products were mainly generated from the supercritical ethanol decomposition, which suggested that ethanol could provide active hydrogen to stabilize the produced fragments during the sawdust liquefaction.…”

Section: Gc Analysissupporting

confidence: 74%

Hydro-liquefaction of woody biomass for bio-oil in supercritical solvent with [BMIM]Cl/NiCl2 catalyst

Peng

Liu

et al. 2015

Appl Petrochem Res

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Thermochemical liquefaction characteristics of sawdust were explored with ethanol as solvent and [BMIM]Cl-NiCl 2 as catalyst. The influences of liquefaction parameters including reaction temperature, residence time and hydrogen initial pressure on the sawdust conversion and products distribution were studied. The maximum bio-oil yield of 75.45 % and conversion of 86.01 % were obtained in ethanol at 320°C and 30 min under 10 MPa hydrogen pressure. The chemical composition of bio-oil and gaseous products derived from optimized conditions was analyzed via GC-MS and GC. These results showed that the dominant compounds of light oil were carboxylic acid, esters and phenol and its derivatives. In addition, the gaseous components consisted of CO 2 , CO, methane, ethane and ethene.

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Section: Gc Analysissupporting

confidence: 74%

Hydro-liquefaction of woody biomass for bio-oil in supercritical solvent with [BMIM]Cl/NiCl2 catalyst

Peng

Liu

et al. 2015

Appl Petrochem Res

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“…Phenols such as 2-methoxy-4-vinylphenol, eugenol, guaiacol, 2-methoxy-4-n-propylphenol, 4-ethyl-2-methoxyphenol, and 2-methoxy-4-methylphenol were undoubtedly derived from the degradation of sawdust. This conforms to the conclusion that softwood lignin contains guaiacyl propane units (Brand et al 2013). In addition, the benzene ring structure of degradation products may have the potential to be used in the synthesis of phenolic resin or other new functional materials (Xu et al 2012).…”

Section: Gc-ms Analysismentioning

confidence: 54%

“…The broad absorption peak near 3392 cm -1 may be due to O-H stretching originating from the presence of cellulose and/or polysaccharide compounds (hemicellulose) (Chen et al 2012). The strong absorbance at 2915 cm -1 , attributed to the C-H stretching vibrations, indicates the presence of methyl and methylene groups (Brand et al 2013). The typical carbonyl group (C=O) stretching vibrations at 1732 cm -1 in the sample show the characteristic absorption peak of hemicellulose (Meryemoğlu et al 2014).…”

Section: Ft-ir Analysismentioning

confidence: 98%

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

ChangWei¹,

Zheng²,

Lv³

et al. 2015

BioResources

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An environmentally benign approach is put forward with the focus on directly liquefying and depolymerizing Cunninghamia lanceolata (Lamb.) Hook. (Chinese fir) sawdust into ethyl levulinate (EL) under supercritical ethanol (scEtOH) conditions by using phosphotungstic acid (PTA) as a catalyst. The effects of parameters such as catalyst dosage, temperature, and reaction time on alcoholysis yield were investigated. The experimental results show that the biomass alcoholysis yield reached 95.35% with 0.5 g PTA as a catalyst at 260 °C for 30 min. Alcoholysis yield and quantitative content of EL depended on the catalyst. The light bio-oil was primarily composed of phenols, aldehydes, ketones, and esters. A high quantitative content of EL up to 20.82% (AR, Relative abundance) was achieved, compared to 0.73% AR when PTA was not added. Hence, scEtOH with dissolved PTA may offer novel media for both chemical reactions and biomass conversion technology as a replacement for environmentally undesirable organic solvents.

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“…Recently there has been conducted research related to incorporation of more complicated substances, such as crude glycerol [45], supercritical ethanol [46] or subcritical water [47]. Further research focused on the application of other, unconventional solvents are associated with ongoing trend related to incorporation of renewable raw materials and law regulations, such as directives of European Union.…”

Section: Liquefaction Of Lignocellulose Biomassmentioning

confidence: 99%

Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers

Kosmela¹,

Zedler²,

Formela³

et al. 2016

ChChT

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Abstract. Diversity of the polyurethane (PU) foams applications cause that investigation of the relationships between their structure and properties is currently very popular topic among the many research institutions and companies. At the turn of the last years many scientific papers about PU foams and their composites were published. The one of the main research trends in this field is related to the reduction of production costs of PU foams. This aim can be successfully achieved through the incorporation of raw materials of natural origin or the utilization of waste materials. This work reviews the progress and recent developments in area of PU foams containing low-cost and pro-ecological modifiers, such as crude glycerol, liquefied biomass, ground tire rubber, etc.

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Supercritical ethanol as an enhanced medium for lignocellulosic biomass liquefaction: Influence of physical process parameters

Cited by 175 publications

References 39 publications

Hydro-liquefaction of woody biomass for bio-oil in supercritical solvent with [BMIM]Cl/NiCl2 catalyst

Hydro-liquefaction of woody biomass for bio-oil in supercritical solvent with [BMIM]Cl/NiCl2 catalyst

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers

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