Bio-Inspired Anti-Oil-Fouling Chitosan-Coated Mesh for Oil/Water Separation Suitable for Broad pH Range and Hyper-Saline Environments

2013 ◽  
Vol 5 (22) ◽  
pp. 11971-11976 ◽  
Author(s):  
Shiyan Zhang ◽  
Fei Lu ◽  
Lei Tao ◽  
Na Liu ◽  
Changrui Gao ◽  
...  
Keyword(s):  
Water Separation ◽  
Saline Environments ◽  
Oil Water Separation ◽  
Oil Water ◽  
Ph Range ◽  
Oil Fouling

scholarly journals Refinery processed water treatment via the low energy Direct Contact Membrane Distillation (DCMD)

2019 ◽  
Vol 74 ◽  
pp. 3 ◽  
Author(s):  
Khadije El Kadi ◽  
Isam Janajreh ◽  
Raed Hashaikeh ◽  
Rizwan Ahmed
Keyword(s):  
Water Treatment ◽  
Pore Size ◽  
Mass Flux ◽  
Thermal Efficiency ◽  
Membrane Distillation ◽  
Low Energy ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil Fouling

The amount of refinery water discharged to the environment from oil industry has increased vigorously in current times. Recent research has been focusing on the use of membrane technology for the refinery processed water treatment. Membrane Distillation (MD) is an emerging technology that has been highly marked by its low-energy requirement and high desalination efficiency. However, conventional MD membranes (i.e. PVDF) are not feasible for oil-water separation processes. That is due to the oleo-philic property of the membrane and thus, causes membrane fouling and halts the production of mass flux. An anti-oil-fouling membrane is essential for a successful oil-water separation by MD. Underwater-oleophobic as well as omniphobic are two different approaches in fabricating such membranes. The former approach is based on the asymmetric surface wettability, whereas the latter is attributed to the surface structure that is characterized by having a very large contact angle for all liquids. However, such composite membranes are characterized by their lower porosity, smaller pore size, but with unique surface slippage, in comparable with the conventional PVDF membranes. As such, in this work, high fidelity numerical simulation of DCMD is performed using non-isothermal Computational Fluid Dynamics (CFD) validated model in order to assess the role of the anti-oil-fouling membrane properties on the performance of the DCMD. Results are presented in terms of temperature polarization coefficient, mass flux, latent heat flux, and thermal efficiency. Results show the compromising effect of membrane porosity to 45% reduces the mass flux and thermal efficiency respectively by 68% and 40%, and reduction of pore size to the half (i.e. 50 nm) can cause a reduction by 50.6% in mass flux and 24.18% in thermal efficiency compared to the baseline (i.e. 100 nm). On the other hand, the omniphobic slippage effect leads to a noticeable gain of 16% in DCMD mass flux with slight gain in thermal efficiency. This can maximize mass flux and thermal efficiency to be as much as 50.3 kg/m2 h and 69%, respectively.

A facile and mild strategy to fabricate an underwater superoleophobic and underoil superhydrophobic mesh with outstanding anti-viscous oil-fouling properties for switchable high viscosity oil/water separation

2019 ◽  
Vol 21 (18) ◽  
pp. 5080-5089 ◽  
Author(s):  
Jin Zhang ◽  
Lu Zhang ◽  
Jianguo Zhao ◽  
Wenshan Qu ◽  
Zhenxing Wang
Keyword(s):  
High Viscosity ◽  
Water Separation ◽  
Viscous Oil ◽  
Oil Water Separation ◽  
Oil Water ◽  
High Viscosity Oil ◽  
Oil Fouling

Underwater superoleophobic and underoil superhydrophobic mesh has been prepared for switchable high viscosity oil/water separation.

Preparation and characterization of the tolerance to acid/alkaline and anti-oil-fouling of regenerated cellulose membranes for oil–water separation

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 114750-114757 ◽  
Author(s):  
Wanfa Zhang ◽  
Xu Chen ◽  
Jiefeng Pan ◽  
Congjie Gao ◽  
Jiangnan Shen
Keyword(s):  
Regenerated Cellulose ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Cellulose Membranes ◽  
Oil Fouling

Novel regenerated cellulose (RC) membranes were fabricated from five non-derivative solvents (NaOH/urea/H2O, NaOH/thiourea/H2O, LiOH/urea/H2O, NaOH/urea/thiourea/H2O and LiOH/urea/thiourea/H2O) for oil–water separation.

One-step synthesis of a robust and anti-oil-fouling biomimetic cactus-like hierarchical architecture for highly efficient oil/water separation

2020 ◽  
Vol 7 (3) ◽  
pp. 903-911 ◽  
Author(s):  
Lei Zhu ◽  
Hui Li ◽  
Yingying Yin ◽  
Zhaozhen Cui ◽  
Chao Ma ◽  
...  
Keyword(s):  
Hierarchical Architecture ◽  
Oily Wastewater ◽  
Simple Method ◽  
Water Separation ◽  
Highly Efficient ◽  
Oil Water Separation ◽  
One Step ◽  
Oil Water ◽  
Oil Fouling

It is of great significance to develop novel superhydrophilic/underwater superoleophobic materials using a facile and simple method for efficiently separating oily wastewater.

Oil/water separation membranes with a fluorine island structure for stable high flux

2021 ◽  
Author(s):  
Mingrui He ◽  
Panpan Wang ◽  
Runnan Zhang ◽  
Zhongyi Jiang ◽  
Xu He ◽  
...  
Keyword(s):  
Surface Energy ◽  
High Flux ◽  
Water Separation ◽  
Island Structure ◽  
Separation Membranes ◽  
Low Surface Energy ◽  
Basic Flux ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil Fouling

Membranes with fluorine island structures consist of discrete low surface energy (LSE) domains at sub-microscale and consecutive hydrophilic domains. The former can effectively control oil fouling while the latter can provide high basic flux.

Cleaning of Oil Fouling with Water Enabled by Zwitterionic Polyelectrolyte Coatings: Overcoming the Imperative Challenge of Oil–Water Separation Membranes

ACS Nano ◽  
2015 ◽  
Vol 9 (9) ◽  
pp. 9188-9198 ◽  
Author(s):  
Ke He ◽  
Haoran Duan ◽  
George Y. Chen ◽  
Xiaokong Liu ◽  
Wensheng Yang ◽  
...  
Keyword(s):  
Water Separation ◽  
Separation Membranes ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil Fouling
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