Accelerating Biodiesel Catalytic Production by Confined Activation of Methanol over High-Concentration Ionic Liquid-Grafted UiO-66 Solid Superacids

ACS Catalysis ◽  
2020 ◽  
Vol 10 (20) ◽  
pp. 11848-11856
Author(s):  
Wen-Li Peng ◽  
Jinxing Mi ◽  
Fujian Liu ◽  
Yao Xiao ◽  
Wei Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
High Concentration ◽  
Solid Superacids

Dissolution of Cellulose in [Amim]Cl/Lithium Salts Solvents System

2012 ◽  
Vol 535-537 ◽  
pp. 1100-1103 ◽  
Author(s):  
Wei Xiao Liao ◽  
Jun Song ◽  
Bo Wen Cheng ◽  
Jie Mei
Keyword(s):  
Ionic Liquid ◽  
Temperature Increase ◽  
Mass Fraction ◽  
Lithium Salts ◽  
Dissolution Behavior ◽  
Cellulose Solution ◽  
High Concentration

Lithium salts were dissolved in ionic liquid [Amim]Cl, and their dissolution behavior were tested by turbidimeter. It is found that the solubility of LiCl in [Amim]Cl is up to 14g/100g [Amim]Cl at 70°C, and it keeps growing as the temperature increase. Turbidity of cellulose solution in [Amim]Cl at 70°C was obtained, but the solubility of high concentration cellulose solution could not be demonstrated accurately in this way. Cellulose solutions with [Amim]Cl or [Amim]Cl/lithium salts as solvents at different temperature were obtained, in which the lithium salts were 1wt%(mass fraction of [Amim]Cl), polarization microscope was used to observe the dissolution behavior of cellulose. The solubility of cellulose would increased as temperature rose, and the solubility of cellulose in [Amim]Cl/1wt%LiCl reached 11.9%(mass fraction of [Amim]Cl) at 80°C, which was higher than in [Amim]Cl 9.4% at 80°C. It is found that the addition of lithium salts into [Amim]Cl can really improve the solubility of cellulose than in [Amim]Cl.

High voltage supercapacitor based on nonflammable high-concentration-ionic liquid electrolyte

2020 ◽  
Vol 598 ◽  
pp. 124858
Author(s):  
Junhong Guo ◽  
Meng Ye ◽  
Kun Zhao ◽  
Jinfeng Cui ◽  
Baoping Yang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
High Voltage ◽  
Liquid Electrolyte ◽  
High Concentration ◽  
Ionic Liquid Electrolyte

scholarly journals Catalysis of Rice Straw Hydrolysis by the Combination of Immobilized Cellulase fromAspergillus nigeronβ-Cyclodextrin-Fe3O4Nanoparticles and Ionic Liquid

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Po-Jung Huang ◽  
Ken-Lin Chang ◽  
Jung-Feng Hsieh ◽  
Shui-Tein Chen
Keyword(s):  
Ionic Liquid ◽  
Rice Straw ◽  
Reaction Rate ◽  
Magnetic Particles ◽  
Initial Reaction Rate ◽  
Initial Reaction ◽  
High Concentration ◽  
Solid Reaction ◽  
Immobilized Cellulase ◽  
Hydrolysis Of

Cellulase fromAspergillus nigerwas immobilized ontoβ-cyclodextrin-conjugated magnetic particles by silanization and reductive amidation. The immobilized cellulase gained supermagnetism due to the magnetic nanoparticles. Ninety percent of cellulase was immobilized, but the activity of immobilized cellulase decreased by 10%. In this study, ionic liquid (1-butyl-3-methylimidazolium chloride) was introduced into the hydrolytic process because the original reaction was a solid-solid reaction. The activity of immobilized cellulase was improved from 54.87 to 59.11 U g immobilized cellulase−1at an ionic liquid concentration of 200 mM. Using immobilized cellulase and ionic liquid in the hydrolysis of rice straw, the initial reaction rate was increased from 1.629 to 2.739 g h−1 L−1. One of the advantages of immobilized cellulase is high reusability—it was usable for a total of 16 times in this study. Compared with free cellulase, magnetized cellulase can be recycled by magnetic field and the activity of immobilized cellulase was shown to remain at 85% of free cellulase without denaturation under a high concentration of glucose (15 g L−1). Therefore, immobilized cellulase can hydrolyze rice straw continuously compared with free cellulase. The amount of harvested glucose can be up to twentyfold higher than that from the hydrolysis by free cellulase.

Anatomical and Topochemical Aspects of Japanese beech (Fagus crenata) Cell Walls After Treatment with the Ionic Liquid, 1-Ethylpyridinium Bromide

2015 ◽  
Vol 21 (6) ◽  
pp. 1562-1572 ◽  
Author(s):  
Toru Kanbayashi ◽  
Hisashi Miyafuji
Keyword(s):  
Ionic Liquid ◽  
Cell Walls ◽  
Middle Lamella ◽  
Morphological Characteristics ◽  
Fagus Crenata ◽  
Cellular Level ◽  
Chemical Components ◽  
Wood Fibers ◽  
High Concentration ◽  
Japanese Beech

AbstractChanges in the ultrastructure and chemical components, and their distribution in Japanese beech (Fagus crenata), during the ionic liquid 1-ethylpyridinium bromide ([EtPy][Br]) treatment were examined at the cellular level by light microscopy, scanning electron microscopy, and confocal Raman microscopy. Each of the tissues, including wood fibers, vessels and parenchyma cells treated with [EtPy][Br] showed specific morphological characteristics. Furthermore, lignin can be preferentially liquefied and eluted in [EtPy][Br] from the cell walls when compared to polysaccharides. However, the delignification was heterogeneous on the cell walls as lignin maintained a relatively high-concentration at the compound middle lamella, cell corners, inner surface of the secondary wall, and pits after [EtPy][Br] treatment.

Reactive extrusion process for the preparation of a high concentration solution of cellulose in ionic liquid for in situ chemical modification

RSC Advances ◽  
2013 ◽  
Vol 3 (4) ◽  
pp. 1021-1024 ◽  
Author(s):  
Magdi E. Gibril ◽  
Li Huan ◽  
Li haiFeng ◽  
Li Xin Da ◽  
Zhang Yue ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Chemical Modification ◽  
Reactive Extrusion ◽  
Extrusion Process ◽  
High Concentration ◽  
High Concentration Solution ◽  
Reactive Extrusion Process

A Polar Liquid Zwitterion Does Not Critically Destroy Cytochrome c at High Concentration: An Initial Comparative Study with a Polar Ionic Liquid

2019 ◽  
Vol 72 (2) ◽  
pp. 139 ◽  
Author(s):  
Kosuke Kuroda ◽  
Chiaki Kodo ◽  
Kazuaki Ninomiya ◽  
Kenji Takahashi
Keyword(s):  
Ionic Liquid ◽  
Cytochrome C ◽  
Soret Band ◽  
Liquid Solution ◽  
Acetate Solution ◽  
High Concentration ◽  
Liquid Solutions ◽  
High Concentration Range ◽  
Ionic Liquid Solution ◽  
Better Than

A polar carboxylate-type zwitterion with a small volume of water can dissolve cytochrome c without significant disruption, compared with the case of a popular polar carboxylate-type ionic liquid, 1-ethyl-3-methylimidazolium acetate. A change in the Soret, Q, and 615nm bands was not observed in the 80 wt-% polar zwitterion solution, whereas a shift in the Soret band, diminishing Q band, and appearance of the 615nm band was found in the 80 wt-% polar ionic liquid solution. It suggests that concentrated polar ionic liquid solutions critically disrupt the structure of cytochrome c, and the polar zwitterion solution used in this study was better than a 1-ethyl-3-methylimidazolium acetate solution in a high concentration range.

Electrochemical Model for Ionic Liquid Electrolytes in Lithium Batteries

2015 ◽  
Author(s):  
Kisoo Yoo ◽  
Prashanta Dutta ◽  
Soumik Banerjee
Keyword(s):  
Mathematical Model ◽  
Ionic Liquid ◽  
Lithium Ion Battery ◽  
Current Density ◽  
Lithium Batteries ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Concentration ◽  
Load Current ◽  
Liquid Electrolytes

A mathematical model is developed for transport of ionic components to study the performance of ionic liquid based lithium batteries. The mathematical model is based on a univalent ternary electrolyte frequently encountered in ionic liquid electrolytes used for lithium batteries. Owing to the very high concentration of components in ionic liquid, the transport of lithium ions are described by the mutual diffusion phenomena using Maxwell-Stefan diffusivity. The model is used to study a lithium ion battery where the cations and anions of ionic liquid are mppy+ and TFSI-. The electric performance results predicted by the model are in good agreement with experimental data. We also studied the effect of load current density on the performance of lithium ion battery using this model. Numerical results indicate that low rate of lithium ion transport causes lithium depleted zone in the porous cathode regions as the load current density increases. This lithium depleted region is responsible for lower specific capacity in lithium-ion cells. The model presented in this study can be used for optimum design of ionic liquid electrolytes for lithium-ion and lithium-air batteries.

Long-term preservation of α-amylase activity in highly concentrated aqueous solutions of imidazolium ionic liquid

2018 ◽  
Vol 7 (2) ◽  
pp. 106-113 ◽  
Author(s):  
Konstantza Tonova
Keyword(s):  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Free Water ◽  
Potassium Acetate ◽  
Acetate Anion ◽  
High Concentration ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Cation ◽  
Long Term Preservation

AbstractThe activity of the α-amylase enzyme incubated in aqueous solutions with a high concentration (80.2% w/v) of imidazolium ionic liquid, [C4C1im]Br, has been studied. Contrary to the complete deactivation hitherto reported in the literature, a way is found to preserve the enzyme, by adding the appropriate salt, so that the activity is saved for a long grace period. Different salts are studied and the concentration is optimized in view of the enzyme hydration. Due to the limited amount of free water available to the enzyme at higher salt concentrations, the activity decreases. The best results are obtained by adding potassium acetate, 0.200 mol dm−3. Some 90% of the activity is saved in a 2-week incubation, and a half activity remains in a month. Precipitates are observed in the samples of the solution without salt. No precipitation is noticed when acetate is present. Regardless of the fluorescence quenching, the activity is saved. The effect of the acetate on the α-amylase preservation is probably related to the ability of the acetate anion to interact with the imidazolium cation thus shielding the enzyme from being salted out and precipitated. Compared with potassium bromide, which does not interact with [C4C1im]Br, precipitation and fast inactivation are observed.

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