Investigating and significantly improving the stability of tannic acid (TA)-aminopropyltriethoxysilane (APTES) coating for enhanced oil-water separation

2020 ◽  
Vol 593 ◽  
pp. 117383 ◽  
Author(s):  
Zhenxing Wang ◽  
Mingcai Han ◽  
Jin Zhang ◽  
Fang He ◽  
Shaoqin Peng ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
The Stability

scholarly journals Research on Basic Properties of Alkali-Surfactant-Polymer Flooding Produced Water and Influence of Oil-Displacing Agent on Settlement

2020 ◽  
Vol 4 (4) ◽  
pp. 1-7
Author(s):  
Zhang D
Keyword(s):  
Produced Water ◽  
Oil Droplets ◽  
Water Separation ◽  
Basic Properties ◽  
Asp Flooding ◽  
Oil Water Separation ◽  
Oil Water ◽  
The Stability ◽  
Relationship Of ◽  
Oil Droplet Size

The basic properties of alkali‒surfactant‒polymer (ASP) flooding produced water and effect of oil displacing agent on the stability of flooding produced water were obtained, through measuring and analysing water quality, oil content-settling time relationship and oil displacing agent-oil droplet size relationship of Zhong-106, Zhong-312, Zhong-417, Nan 4-8 and Bei 2-7 flooding produced water from Daqing Oilfield. The addition of ternary oil displacement agent to ASP flooding produced water greatly increases the difficulty of oil-water separation, and higher the concentration, worse the separation effect after standing. The effects of alkali, surfactant, and polymer on oil-water stability in simulated ASP flooding produced water were studied respectively. The ASP flooding produced water after 48 hours of settling formed a trace amount of nano-oil droplets, also accompanied by the accumulation and separation of a part of the oil droplets.

scholarly journals Functional Hydrophilic Membrane for Oil–Water Separation Based on Modified Bio-Based Chitosan–Gelatin

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1176
Author(s):  
Siti Zarina Zakuwan ◽  
Ishak Ahmad ◽  
Nurfaizah Abu Tahrim ◽  
Faizal Mohamed
Keyword(s):  
Separation Efficiency ◽  
Morphological Structure ◽  
Water Mixture ◽  
Scanning Calorimetry ◽  
Water Separation ◽  
Modified Chitosan ◽  
Oil Water Separation ◽  
Oil Water ◽  
The Stability ◽  
Hydrophilic Membrane

In this study, we fabricated a modified biomaterial based on chitosan and gelatin, which is an intrinsic hydrophilic membrane for oil–water separation to clean water contamination by oil. Modification of the membrane with a non-toxic natural crosslinker, genipin, significantly enhanced the stability of the biopolymer membrane in a water-based medium towards an eco-friendly environment. The effects of various compositions of genipin-crosslinked chitosan–gelatin membrane on the rheological properties, thermal stability, and morphological structure of the membrane were investigated using a dynamic rotational rheometer, thermogravimetry analysis, and chemical composition by attenuated total reflectance spectroscopy (ATR). Modified chitosan–gelatin membrane showed completely miscible blends, as determined by field-emission scanning electron microscopy, differential scanning calorimetry, and ATR. Morphological results showed membrane with establish microstructure to further experiment as filtration product. The membranes were successfully tested for their oil–water separation efficiencies. The membrane proved to be selective and effective in separating water from an oil–water mixture. The optimum results achieved a stable microporous structure of the membrane (microfiltration) and a separation efficiency of above 98%. The membrane showed a high permeation flux, generated as high as 698 and 420 L m−2 h−1 for cooking and crude oils, respectively. Owing to its outstanding recyclability and anti-fouling performance, the membrane can be washed away easily, ensuring the reusability of the prepared membrane.

Tannic acid encountering ovalbumin: a green and mild strategy for superhydrophilic and underwater superoleophobic modification of various hydrophobic membranes for oil/water separation

2018 ◽  
Vol 6 (28) ◽  
pp. 13959-13967 ◽  
Author(s):  
Zhenxing Wang ◽  
Shengqiang Ji ◽  
Jin Zhang ◽  
Qixian Liu ◽  
Fang He ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Water Separation ◽  
Hydrophobic Membranes ◽  
Oil Water Separation ◽  
Green Strategy ◽  
Oil Water

A mild and completely green strategy has been developed to transform various membranes into superhydrophilic membranes for oil/water separation.

The Stability Analysis for Multivariable System Based on Lyapunov’s Function and its Application in Oil-Water Separation

2014 ◽  
Vol 926-930 ◽  
pp. 3310-3313
Author(s):  
Ai Hua Xu ◽  
Ying Zi Yuan
Keyword(s):  
Control System ◽  
Uncertain System ◽  
Separation Process ◽  
Sufficient Condition ◽  
Multivariable System ◽  
Water Separation ◽  
Oil Water Separation ◽  
Delayed System ◽  
Oil Water ◽  
The Stability

By choosing even universal Lyapunov’s function, we obtain sufficient condition of independent stability and exponential stability of delayed system . By choosing a set of suitable parameters, we can reduce the conservation of condition. As a result, this method provides a new way to ameliorate stability in robustness bounds and robustness control for uncertain system with delayed state. Analyze oil-water separation process of control system in the unite station. Obtain variation relevancy chart with oil-water separation process. Clear classify the relation among variation.

Complex membrane of cellulose and chitin nanocrystals with cationic guar gum for oil/water separation

2019 ◽  
Vol 136 (37) ◽  
pp. 47947 ◽  
Author(s):  
Hajo Yagoub ◽  
Liping Zhu ◽  
Mahmoud H. M. A. Shibraen ◽  
Xiaowei Xu ◽  
Dafaalla M. D. Babiker ◽  
...  
Keyword(s):  
Guar Gum ◽  
Water Separation ◽  
Complex Membrane ◽  
Oil Water Separation ◽  
Oil Water
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