Statically Adsorbed Coatings for High Separation Efficiency and Resolution in CE–MS Peptide Analysis: Strategies and Implementation

2016 ◽  
pp. 53-75 ◽  
Author(s):  
Martin Pattky ◽  
Katalin Barkovits ◽  
Katrin Marcus ◽  
Oliver H. Weiergräber ◽  
Carolin Huhn
Keyword(s):  
Separation Efficiency ◽  
Peptide Analysis ◽  
Analysis Strategies ◽  
High Separation

scholarly journals The Limitations in Current Studies of Organic Fouling and Future Prospects

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 922
Author(s):  
Xianghao Meng ◽  
Shujuan Meng ◽  
Yu Liu
Keyword(s):  
Membrane Fouling ◽  
Separation Efficiency ◽  
Deep Understanding ◽  
Support Vector ◽  
Feed Water ◽  
Source Water ◽  
Future Prospects ◽  
Surrogate Substances ◽  
High Separation ◽  
Selection Of

Microfiltration and ultrafiltration for water/wastewater treatment have gained global attention due to their high separation efficiency, while membrane fouling still remains one of their bottlenecks. In such a situation, many researchers attempt to obtain a deep understanding of fouling mechanisms and to develop effective fouling controls. Therefore, this article intends to trigger discussions on the appropriate choice of foulant surrogates and the application of mathematic models to analyze fouling mechanisms in these filtration processes. It has been found that the commonly used foulant surrogate (sodium alginate) cannot ideally represent the organic foulants in practical feed water to explore the fouling mechanisms. More surrogate foulants or extracellular polymeric substance (EPS) extracted from practical source water may be more suitable for use in the studies of membrane fouling problems. On the other hand, the support vector machine (SVM) which focuses on the general trends of filtration data may work as a more powerful simulation tool than traditional empirical models to predict complex filtration behaviors. Careful selection of foulant surrogate substances and the application of accurate mathematical modeling for fouling mechanisms would provide deep insights into the fouling problems.

Controllable Preparation of Silver Orthophosphate@Carbon Layer Core/Shell Heterostructure with Enhanced Visible Photocatalytic Properties and Stability

NANO ◽  
2015 ◽  
Vol 10 (02) ◽  
pp. 1550022 ◽  
Author(s):  
Yangcun Xie ◽  
Xiuwen Wang ◽  
Xu Wen
Keyword(s):  
High Stability ◽  
Separation Efficiency ◽  
Visible Region ◽  
Carbon Layer ◽  
Core Shell ◽  
Photogenerated Electrons ◽  
First Time ◽  
Fabrication Parameters ◽  
Controllable Preparation ◽  
High Separation

In this study, silver orthophosphate@carbon layer ( Ag 3 PO 4@ C ) core/shell heterostructure photocatalyst was prepared for the first time. The results showed that a uniform carbon layer was formed around the Ag 3 PO 4. By adjusting the hydrothermal fabrication parameters, the thickness of carbon layer could be easily controlled. Furthermore, the Ag 3 PO 4@ C had remarkable light absorption in the visible region. Photocatalytic tests displayed that the Ag 3 PO 4@ C heterostructures possessed a much higher degradation rate of phenol than pure Ag 3 PO 4 under visible light. The enhanced photocatalytic activity could be attributed to high separation efficiency of photogenerated electrons and holes based on the synergistic effect between carbon as a sensitizer and Ag 3 PO 4. Recycle tests showed that the Ag 3 PO 4@ C core/shell heterostructures maintained high stability over several cycles. The good stability could be attributed to the protection of insoluble carbon layer on the surfaces of Ag 3 PO 4 crystals in aqueous solution.

Numerical evaluation of separation efficiency in the diverging T-junction for slug flow

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Faheem Ejaz ◽  
William Pao ◽  
Hafiz Muhammad Ali
Keyword(s):  
Slug Flow ◽  
Design Methodology ◽  
Separation Efficiency ◽  
Fluid Model ◽  
Diameter Ratio ◽  
Maintenance Costs ◽  
Content Type ◽  
Computational Fluid Dynamics Cfd ◽  
Practical Implications ◽  
High Separation

Purpose Offshore industries encounter severe production downtime due to high liquid carryovers in the T-junction. The diameter ratio and flow regime can significantly affect the excess liquid carryovers. Unfortunately, regular and reduce T-junctions have low separation efficiencies. Ansys as a commercial computational fluid dynamics (CFD) software was used to model and numerically inspect a novel diverging T-junction design. The purpose of diverging T-junction is to merge the specific characteristics of regular and reduced T-junctions, ultimately increasing separation efficiency. The purpose of this study is to numerically compute the separation efficiency for five distinct diverging T-junctions for eight different velocity ratios. The results were compared to regular and converging T-junctions. Design/methodology/approach Air-water slug flow was simulated with the help of the volume of the fluid model, coupled with the K-epsilon turbulence model to track liquid-gas interfaces. Findings The results of this study indicated that T-junctions with upstream and downstream diameter ratio combinations of 0.8–1 and 0.5–1 achieved separation efficiency of 96% and 94.5%, respectively. These two diverging T-junctions had significantly higher separation efficiencies when compared to regular and converging T-junctions. Results also revealed that over-reduction of upstream and downstream diameter ratios below 0.5 and 1, respectively, lead to declination in separation efficiency. Research limitations/implications The present study is constrained for air and water as working fluids. Nevertheless, the results apply to other applications as well. Practical implications The proposed T-junction is intended to reduce excessive liquid carryovers and frequent plant shutdowns. Thus, lowering operational costs and enhancing separation efficiency. Social implications Higher separation efficiency achieved by using diverging T-junction enabled reduced production downtimes and resulted in lower maintenance costs. Originality/value A novel T-junction design was proposed in this study with a separation efficiency of higher than 90%. High separation efficiency eliminates loss of time during shutdowns and lowers maintenance costs. Furthermore, limitations of this study were also addressed as the lower upstream and downstream diameter ratio does not always enhance separation efficiency.

Amorphous colloidal photonic crystals assembled by mesoporous silica particles for thin layer chromatography with high separation efficiency and colorimetric recognition

2020 ◽  
Vol 8 (48) ◽  
pp. 17202-17210
Author(s):  
Xin Zhang ◽  
Yumei Ran ◽  
Qianqian Fu ◽  
Jianping Ge
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Mesoporous Silica ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Separation Efficiency ◽  
Colloidal Photonic Crystals ◽  
Crystal Film ◽  
Layer Chromatography ◽  
High Separation

A mesoporous SiO2 amorphous photonic crystal film was used to develop new thin-layer chromatography with high separation efficiency and simplified recognition.

Determination of Nitrophenol Isomers in Water

2015 ◽  
Vol 1083 ◽  
pp. 80-83
Author(s):  
Xiao Na Ji ◽  
Sheng Shu Ai ◽  
Juan Tang ◽  
Hong Qu ◽  
De Jun Bian
Keyword(s):  
Separation Efficiency ◽  
Tap Water ◽  
Target Object ◽  
Hplc Method ◽  
The Other ◽  
Municipal Sewage ◽  
External Standard Method ◽  
External Standard ◽  
High Separation

This paper establishes the HPLC method of determining three nitrophenol isomers in municipal sewage, surface water and tap water. After the sample is filtered and distilled, conduct the monitoring analysis on the distillate with HPLC-DAD and quantify it in external standard method. In the municipal sewage treated in bioanalysis method one type of target object o-nitrophenol is found, whose content is 0.11mg·L-1, no target object is found in all the other samples. This method has the adventages of high separation efficiency and high analysis rate. The experiment result shows that the linear correlation coefficient is above 0.983, the recovery rate lies between 78.6% and 105.2%, the minimum detection limit is 0.05mg·L-1(S/N=3.0).

Gas Liquid Vane Separators in High Pressure Applications

2010 ◽  
Author(s):  
Dani Fadda ◽  
David Barker
Keyword(s):  
Separation Efficiency ◽  
Pressure Vessels ◽  
Cfd Modeling ◽  
Test Results ◽  
Capacity Curves ◽  
Liquid Handling ◽  
Wide Range ◽  
Computational Fluid Dynamics Cfd ◽  
Very High ◽  
High Separation

Vane separators are inertial devices used to remove entrained liquids from gas. They are utilized in pressure vessels operating at a wide range of temperatures and pressures. Computational Fluid Dynamics (CFD) modeling and sizing calculations are used to evaluate the loading to a vane separator and determine the maximum overall gas and liquid handling capacity of the pressure vessel. Test results, performed at operating pressures up to 133 bar (1931 psia) using live natural gas illustrate that, when sized correctly based on the vane’s capacity curves and CFD modeling, vane separators continue to have high separation efficiency at very high operating pressures.

Effects of Oil Wettability on the Performance of a Cyclone-Type Oil Separator

2018 ◽  
Vol 26 (01) ◽  
pp. 1850010
Author(s):  
Joon Ahn ◽  
Seongil Jang
Keyword(s):  
Experimental Data ◽  
Surface Treatment ◽  
Oil Recovery ◽  
Separation Efficiency ◽  
Refrigeration System ◽  
High Separation

The effects of oil wettability on the performance of a cyclone-type oil separator was studied through in situ experimentation and in a real refrigeration system. Based on previous research, the geometry of the oil separator in the present study was designed with an oil recovery device installed at its bottom to mount it on the actual refrigerator. The performance of the oil separator without surface treatment was predicted by applying design correlations proposed in the open literature, which were then compared with the experimental data. Through surface treatment, oleophilic or oleophobic properties were given to the inner wall and helix of the oil separator, and its performance was measured in a real refrigeration system. Oil wettability had a great effect on the performance of the oil separator, and in order to obtain high separation efficiency, oleophilic properties were found to be advantageous not only in the inner wall but also in the helix.

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