scholarly journals Energy-efficient bioethanol recovery process using deep eutectic solvent as entrainer

2021 ◽  
Author(s):  
Seong Chan Lee ◽  
Hyeon Woo Oh ◽  
Hee Chul Woo ◽  
Young Han Kim
Keyword(s):  
Energy Efficient ◽  
High Performance ◽  
Large Scale ◽  
Fermentation Broth ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Recovery Process ◽  
Liquid Equilibrium ◽  
Extraction Solvent ◽  
Industrial Operations

AbstractBioethanol is commonly recovered from fermentation broth via distillation because it is the most economical and reliable process for large-scale industrial operations. Because extraction is a highly energy-efficient process applicable to low-composition bio-product separation, high-performance solvents are necessary for efficient bioethanol recovery. 2-Methyl pentanol, a branched long-chain alcohol, which was used as the extraction solvent, and a deep eutectic solvent, choline chloride and ethylene glycol (1:2), was employed as an entrainer for product refinement. Thermodynamic models of vapor–liquid equilibrium (VLE) and liquid–liquid equilibrium (LLE) systems were derived using molecular simulations and experimental results to develop the bioethanol extraction and refinement processes. The heat duty of the designed process was reduced by a quarter compared to that of previous recovery processes. Graphic abstract

scholarly journals Green and Efficient Extraction of Polysaccharides From Poria cocos F.A. Wolf by Deep Eutectic Solvent

2020 ◽  
Vol 15 (2) ◽  
pp. 1934578X1990070 ◽  
Author(s):  
Weida Zhang ◽  
Shaobo Cheng ◽  
Xiaona Zhai ◽  
Junshe Sun ◽  
Xuefang Hu ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Extraction Yield ◽  
Hot Water ◽  
Poria Cocos ◽  
Extraction Solvent ◽  
Molecular Weight Distributions ◽  
Efficient Extraction ◽  
Run Test

Deep eutectic solvents (DESs) were proposed for the extraction of polysaccharides from Poria cocos (PCPs). Six types of DESs were prepared, and the DES composed of choline chloride and oxalic acid was proved to be suitable. Based on the results of single-factor test, the Box-Behnken experimental design with response surface methodology was carried out, giving the optimal extraction conditions including mole ratio of 1:2 (choline chloride:oxalic acid) and extraction 15 minutes at 100°C. Under the optimal extraction conditions, the extraction yield (46.24% ± 0.13%) was 8.6 times higher than that of hot water. The reusability of DES was demonstrated by a 6-run test, and an extraction yield of PCP was 38.40% ± 0.23% after reusing for 6 times without adding any additional chemicals. Moreover, molecular weight distributions of the resulting PCP were analyzed, and then mainly distributed in the range of 753 to 3578 g/mol. Therefore, DESs were proved to be an excellent extraction solvent alternative to the extraction of PCP.

Processing of Electric Arc Furnace Dust using Deep Eutectic Solvents

2009 ◽  
Vol 62 (4) ◽  
pp. 341 ◽  
Author(s):  
Andrew P. Abbott ◽  
John Collins ◽  
Ian Dalrymple ◽  
Robert C. Harris ◽  
Reena Mistry ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Large Scale ◽  
Choline Chloride ◽  
Scale Up ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Ammonia Solution ◽  
Fluid Viscosity ◽  
Hydrogen Bond Donor ◽  
Pure Zinc

The present paper describes the design and operation of the first large-scale extraction and separation of metals from a complex matrix using an ionic liquid. The liquid was a deep eutectic solvent based on choline chloride. The hydrogen-bond donors were mixed to optimize solubility and fluid viscosity. It was found that the incorporation of a fine particulate dust actually decreased the viscosity of the fluid. The present paper shows that selective extraction of zinc and lead can be achieved through judicious choice of the hydrogen-bond donor and it is also shown that metals in solution can be separated using cementation with zinc powder. Electrowinning of pure zinc is demonstrated but scale-up tests suggest that the process is relatively slow and has poor current efficiency. An alternative methodology was developed to rapidly recover the zinc from solution using dilute ammonia solution. It is also shown for the first time that cementation can be efficiently carried out in ionic liquids because the recovered metal is porous and allows thick layers to be deposited.

Application of deep eutectic solvents (DES) to the denitrification of transportation fuels : insights from experimental liquid-liquid phase equilibrium data

2018 ◽  
Author(s):  
◽  
Sanele Enough Msibi
Keyword(s):  
Ethylene Glycol ◽  
Fossil Fuels ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Distribution Coefficients ◽  
Liquid Equilibrium ◽  
Transportation Fuels ◽  
Basic Nitrogen ◽  
Equilibrium Data

Air pollution by combustion of fossil fuels is of global concern in this decade and beyond. The presence of nitrogen and sulphur impurities pose deleterious effects to refinery equipment, the environment, and human health. Therefore, many governments continue to impose stringent environmental regulations and standards on transportation fuels emissions. The current study evaluates alternate processing solutions to complement or replace the currently used processes to refine these impurities to meet the increasingly stringent fuel standards. This study evaluates the use of a class extractive solvents called Deep Eutectic Solvents (DES) for the removal of basic nitrogen impurities from refining streams by liquid-liquid extraction. This process is evinced as energy saving and environmentally friendly. The removal of pyridine and quinoline by the direct analytical method with choline chloride based deep eutectic solvent (DES) was studied. Liquid-liquid equilibrium measurements data were undertaken at 298.15 K and atmospheric pressure for n-heptane + pyridine/quinoline + [choline chloride + glycerol] DES and n-heptane + pyridine/quinoline + [choline chloride + ethylene glycol] DES systems. The obtained data were then regressed using the Non Random Two Liquid and Universal Quasi-Chemical models activity coefficient, and their mathematical reliability was validated using the Othmer Tobias and Hand correlations. A mixture of choline chloride and glycerol (DES1) showed greater extraction potential for basic nitrogen containing compounds compared to choline chloride and ethylene glycol with a distribution coefficient and selectivity of 22.7 and 2056 for pyridine, and 3.3 and 164.9 for quinoline respectively. The studied solvents showed comparability to organic and ionic liquids solvents in selectivity and distribution coefficients. The obtained liquid-liquid equilibrium data can be used in the design of a solvent extraction equipment, as phase diagrams plays an important role in separation process design.

Temperature-induced Au nanostructure synthesis in a nonaqueous deep-eutectic solvent for high performance electrocatalysis

2015 ◽  
Vol 3 (31) ◽  
pp. 15869-15875 ◽  
Author(s):  
S. Kumar-Krishnan ◽  
E. Prokhorov ◽  
O. Arias de Fuentes ◽  
M. Ramírez ◽  
N. Bogdanchikova ◽  
...  
Keyword(s):  
High Performance ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Gold Nanostructures ◽  
Controlled Synthesis

Structure-controlled synthesis of gold nanostructures (AuNSs) induced by temperature in a nonaqueous urea–choline chloride deep eutectic solvent (DES) is reported.

scholarly journals Improvement of the Solubilization and Extraction of Curcumin in an Edible Ternary Solvent Mixture

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7702
Author(s):  
Verena Huber ◽  
Laurie Muller ◽  
Johnny Hioe ◽  
Pierre Degot ◽  
Didier Touraud ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Curcuma Longa ◽  
Choline Chloride ◽  
Total Yield ◽  
Deep Eutectic Solvent ◽  
Solvent Mixture ◽  
Extraction Solvent ◽  
Natural Deep Eutectic Solvent

A water-free, ternary solvent mixture consisting of a natural deep eutectic solvent (NADES), ethanol, and triacetin was investigated concerning its ability to dissolve and extract curcumin from Curcuma longa L. To this purpose, 11 NADES based on choline chloride, acetylcholine, and proline were screened using UV–vis measurements. A ternary phase diagram with a particularly promising NADES, based on choline chloride and levulinic acid was recorded and the solubility domains of the monophasic region were examined and correlated with the system’s structuring via light scattering experiments. At the optimum composition, close to the critical point, the solubility of curcumin could be enhanced by a factor of >1.5 with respect to acetone. In extraction experiments, conducted at the points of highest solubility and evaluated via HPLC, a total yield of ~84% curcuminoids per rhizome could be reached. Through multiple extraction cycles, reusing the extraction solvent, an enrichment of curcuminoids could be achieved while altering the solution. When counteracting the solvent change, even higher concentrated extracts can be obtained.

scholarly journals OPTIMIZATION OF MICROWAVE- AND ULTRASONIC-ASSISTED EXTRACTION OF MAHKOTA DEWA (PHALERIA MACROCARPA [SCHEFF.] BOERL.) FRUIT PULP

2020 ◽  
pp. 32-37
Author(s):  
ROSITA HANDAYANI ◽  
ANDRE BANGUN ◽  
PASKAH DEWI DEBORAH ◽  
ABDUL MUN’IM
Keyword(s):  
Antioxidant Activity ◽  
High Performance ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Total Phenolic ◽  
Solvent Ratio ◽  
Water Addition ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction

Objective: This work aimed to determine the optimal extraction conditions of Mahkota dewa using different extraction methods: microwave-assistedextraction with ethanol (MAE-ethanol), ultrasonic-assisted extraction using a choline chloride natural deep eutectic solvent (UAE-NADES), andSoxhlet and reflux extractions.Methods: Experimental design was performed through Box-Behnken. The efficiency of the methods was evaluated based on the total phenolic content(TPC) and antioxidant activity. The presence of relevant compounds was qualitatively assessed by high-performance liquid chromatography (HPLC).Results: For the MAE-ethanol method, optimum extraction was achieved with 65% ethanol, in 1 min under 30% microwave power, and a 1:12 sample–solvent ratio, which yielded a TPC and antioxidant activity of 62.79±0.74 mg gallic acid equivalents (GAE)/g powder and 30.48±0.32%, respectively. InUAE-NADES, the optimal conditions were choline chloride: lactic acid ratio of 1:4 with a 50% water addition, 20 min extraction (TPC and antioxidantactivity of 65.25 mg GAE/g powder and 26.45±0.02%). The Soxhlet and reflux methods gave a TPC of 49.68±0.59 and 50.98±0.54 mg GAE/g powder,and antioxidant activity of 22.87±0.13% and 25.97±0.34%, respectively. Qualitative HPLC analysis showed the presence of quercetin, mahkoside A,4,6-dihydroxy-4-methoxybenzophenone-2-O-β-D-glucopyranoside, and mangiferin.Conclusion: MAE-ethanol was more efficient than the conventional Soxhlet and reflux methods and performed similarly to UAE-NADES in terms of TPC.

Liquid-liquid equilibrium of alcohol–ester systems with deep eutectic solvent on the base of choline chloride

2019 ◽  
Vol 131 ◽  
pp. 369-374 ◽  
Author(s):  
Artemiy Samarov ◽  
Natalia Shner ◽  
Ekaterina Mozheeva ◽  
Alexander Toikka
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Liquid Equilibrium

scholarly journals Energy efficient high-performance approximate adders for imprecision-tolerant signal processing applications

2021 ◽  
Vol 2107 (1) ◽  
pp. 012065
Author(s):  
K Komathy Vanitha ◽  
S Anila
Keyword(s):  
Signal Processing ◽  
Energy Efficient ◽  
High Performance ◽  
Large Scale ◽  
Approximate Computing ◽  
Process Technology ◽  
Trade Off ◽  
Large Scale Integration ◽  
Power Delay Product ◽  
Scale Integration

Abstract The trade-off between Delay and Power consumption has become a major concern as process technology reached less than 10 nm proximity in the modern Very Large-Scale Integration (VLSI) technology. This trade-off can be compensated with accuracy and is vanquished by the development of Approximate Computing (AC). In this paper, six diverse Approximate Adders (AAs) have been proposed based on logic complexity reduction at the transistor level. Simulation results reveal that the Proposed AAs has a significant amount of Power and Delay savings, lesser Power-Delay Product (PDP). The Proposed AAs:PA1, PA3, PA5, PA3 exhibits 12.85 %, 41.59%, 72.05 %, 1.91% lesser power than the Existing AAs EAA1, EAA5, EAA6, EAA9 respectively. The Proposed AAs: PA2, PA3 incorporates 37.5 %, 54.5%, of lesser number of transistors compared to Existing AAs: EAA5, EAA9 whereas PA4, PA5 incorporates 40 % of reduction in the number of transistors compared to Existing AAs: EAA6, EAA8. These results are promising for high performance and energy efficient systems for error-resilient applications such as multimedia and signal processing where a slightly degraded output quality is acceptable, which could lead to significant power reduction.

Improving Energy-Efficiency of Computational Grids via Scheduling

2011 ◽  
pp. 1836-1857
Author(s):  
Ziliang Zong ◽  
Xiaojun Ruan ◽  
Adam Manzanares ◽  
Kiranmai Bellam ◽  
Xiao Qin
Keyword(s):  
Energy Efficiency ◽  
Energy Conservation ◽  
Grid Computing ◽  
Energy Efficient ◽  
High Speed ◽  
High Performance ◽  
Large Scale ◽  
Rapid Development ◽  
Computational Grids ◽  
Grid Architecture

High performance Grid platforms and parallel computing technologies are experiencing their golden age because of the convergence of four critical momentums: high performance microprocessors, high-speed networks, free middleware tools, and highly increased needs of computing capability. We are witnessing the rapid development of computational Grid technologies. Dozens of exciting Grid infrastructures and projects like Grid-tech, Grid Portals, Grid Fora, and Commercial Grid Initiatives are being built all over the world. However, the fast growing power consumption of data centers has caused serious concerns for building more large-scale supercomputers, clusters, and Grids. Therefore, designing energy-efficient computational Grids to make them economically attractive and environmentally friendly for parallel applications becomes highly desirable. Unfortunately, most previous studies in Grid computing primarily focus on the improvement of performance, security, and reliability, while completely ignoring the energy conservation issue. To address this problem, we propose a general architecture for building energy-efficient computational Grids and discuss the potential possibilities for incorporating power-aware techniques to different layers of the proposed Grid architecture. In this chapter, we first provide necessary background on computational Grids, Grid computing, and parallel scheduling. Next, we illustrate the general Grid architecture and explain the functionality of different layers. Followed by that, we discuss the design and implementation details of applying the energy-efficient job-scheduling technique, which is called Communication Energy Conservation Scheduling (or CECS for short), to computational Grids. Finally, we present extensive simulation results to prove the improvement of energy-efficiency of computational Grids.

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