Blended ionic liquid systems for macroalgae pretreatment

Malihan, Lenny B.; Nisola, Grace M.; Mittal, Neha; Seo, Jeong Gil; Chung, Wook-Jin

doi:10.1016/j.renene.2014.01.003

Cited by 32 publications

(27 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The acid‐catalysed hydrolysis of red macroalgae is similar to that of brown algae wherein algal polymers such as agarose and cellulose are broken down into their monomeric sugars and further degraded into formic acid and levulinic acid. It was previously observed that sugar degradation is enhanced at prolonged reaction time . In Fig.…”

Section: Resultsmentioning

confidence: 96%

“…S3) also showed a similar trend achieving a maximum value at 120 °C and a decline thereafter. Further increase in the temperature (>120 °C) decreased the total sugar yields, mainly due to formation of decomposition products . Sugar degradation products such as 5‐HMF, formic acid and levulinic acid form at high temperature under acidic conditions .…”

Section: Resultsmentioning

confidence: 99%

“…The carbohydrate content of G. amansii was determined using a modified two-step hydrolysis procedure described elsewhere. 8 Compositional analysis revealed that the macroalgae contained…”

Section: Analysis Of Productsmentioning

confidence: 99%

“…Recently, environmentally benign ionic liquids (ILs) have been popularly used as effective solvents for biomass as well as in acid‐catalyzed hydrolysis of lignocellulosic biomass and macroalgae. Hydrolysis rates in IL environments can occur more rapidly in homogeneous biomass/IL systems than in heterogeneous biomass/acidic aqueous systems . Meanwhile, task specific ILs with dual properties (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Macroalgal biomass hydrolysis using dicationic acidic ionic liquids

Malihan

Mittal

Nisola

et al. 2016

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

BACKGROUND Macroalgae has high potential as a bio‐fuel feedstock due to its high carbohydrate content. Conventional aqueous systems require a huge amount of energy to catalyze depolymerization and hydrolysis of macroalgae. Recently various task‐specific ionic liquids (ILs) successfully depolymerized different biomasses, but were thermally unstable. A variety of dicationic acidic ILs (DAILs) connected by oligo‐ethylene glycol (EG) chains bearing hydrogen sulfate (HSO4−) anions were synthesized with better thermal stability and utilized in hydrolysis of macroalgal biomass, Gelidium amansii. RESULTS The structures of DAILs were confirmed by 1H and 13C NMR as well as FT‐IR. EG‐linker chain lengths and dicationic structure increased the thermal stability of DAILs and influenced their catalytic performance for G. amansii hydrolysis. DAILs linked with short oligo‐EG chains afforded higher sugar yields and exhibited faster hydrolysis rates compared with those linked by long oligo‐EG chains (i.e. PEG400 and PEG600). A maximum sugar yield of 67.45 wt% was recovered from G. amansii using [Tri‐EG‐(MIm)2] 2HSO4 DAIL, after 3 min at 120 °C. CONCLUSION The synthesized DAILs showed dual properties as catalyst and reaction medium for hydrolysis of macroalgae in solvent‐less conditions. Shorter oligo‐EG chain linked DAILs exhibited faster reaction rates with higher sugar yields. © 2016 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

“…The carbohydrate content of G. amansii was determined using a modified two-step hydrolysis procedure described elsewhere. 8 Compositional analysis revealed that the macroalgae contained…”

Section: Analysis Of Productsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Macroalgal biomass hydrolysis using dicationic acidic ionic liquids

Malihan

Mittal

Nisola

et al. 2016

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

show abstract

“…This treatment caused the hemicellulose and the lignin to be degraded and dissolve from the cell walls of the pine wood. [75] Then there are other examples where biomass samples have been tested with aqueous acidic IL pretreatments, resulting partial depolymerizations, which include; pretreatment of corn stover using 1-ethyl-3-methylimidazolium hydrogensulfate; [76] microalgae using 1-butyl-3-methylimidazolium hydrogensulfate; [77] hybrid aspen and Norway spruce using 1-ethyl-3-methylimidazolium hydrogensulfate; [78] and eucalyptus with 1-ethyl-3-methylimidazolium hydrogensulfate under microwave heating. [79] The use of hydroxyl group functionalized basic ionic liquids have enabled the separation of lignin and carbohydrates from softwood biomass.…”

Section: Ionic Liquids In Biomass Pretreatmentmentioning

confidence: 99%

Ionic Liquids in Biomass Processing

Amarasekara

2018

Israel Journal of Chemistry

View full text Add to dashboard Cite

The ionic liquids have emerged as new solvents and catalysts for processing biomass to value added chemicals and fuels. This review will present the recent developments in applications of ionic liquids in lignocellulosic biomass pretreatments, depolymerization, biodiesel synthesis, dehydration of carbohydrates to renewable feedstock chemicals as well as further transformations of biomass derived feedstocks such as furfural, 5‐hydroxymethylfurfural and levulinic acid to value added chemicals. In addition, the recycling of ionic liquids used in biomass processing is also discussed in the review.

show abstract