Y-Type Zeolite Membranes: Synthesis by Secondary by Method and Application in Treatment of Oily Effluents

2019 ◽  
Vol 958 ◽  
pp. 23-28
Author(s):  
Antonielly Santos Barbosa ◽  
Antusia Santos Barbosa ◽  
Meiry Gláucia Freire Rodrigues
Keyword(s):  
Zeolite Y ◽  
Dip Coating ◽  
Zeolite Membrane ◽  
Gamma Alumina ◽  
Zeolite Membranes ◽  
Water Emulsion ◽  
Ceramic Support ◽  
Coating Method ◽  
Dip Coating Method ◽  
Alpha Alumina

Several zeolite membrane types, including Mordenite (MOR), Linde Type A (LTA), and Faujasite (FAU), have been developed. Among these membranes, FAU zeolite membranes have a variety of applications, especially in the separation of mixtures that contain large molecules. The goal of this study is to use zeolite membranes (Y/alumina) to separate suspensions of oil-in-water emulsion. Two ceramic supports were prepared from the alumina at different sintering temperatures (700°C and 1200°C) to obtain gamma-alumina and alpha-alumina, respectively. The materials prepared, zeolite Y membranes/alpha-alumina and Y/gamma-alumina, were characterized using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The powder pressing method was used to compact the alpha-alumina and gamma-alumina ceramic support and the dip-coating method was used to prepare the zeolite Y membranes. The XRD pattern showed that the zeolite Y membrane/alumina obtained by the secondary growth dip-coating method, independent of the ceramic support used, showed no trace of the phases characterized as impurities. It was possible to observe a significant reduction in the concentration of oil in the permeate for the zeolite Y membranes, thus showing their potential for use in this application.

scholarly journals Influence of the methodology on the formation of zeolite membranes MCM-22 for the oil/water emulsion separation

Cerâmica ◽  
2019 ◽  
Vol 65 (376) ◽  
pp. 531-540 ◽  
Author(s):  
A. S. Barbosa ◽  
A. S. Barbosa ◽  
M. G. F. Rodrigues
Keyword(s):  
Pure Water ◽  
Dip Coating ◽  
Zeolite Membrane ◽  
Vapor Phase Transport ◽  
Zeolite Membranes ◽  
Water Emulsion ◽  
Water Permeation ◽  
Final Value ◽  
Emulsion Separation ◽  
Oil Water

Abstract This work aimed to produce zeolite membranes MCM-22 using two methods of synthesis, dip coating (DC) and vapor phase transport (VPT), to be evaluated in the oil/water emulsion separation process. The membranes were prepared at 150 °C for 10 days and characterized by X-ray diffraction and scanning electron microscopy. They were evaluated in tests of pure water permeation and oil/water emulsion separation system of a synthetic effluent, using a stainless-steel module under the conditions of the initial concentration of the emulsion of 100 mg/L, temperature of 25 °C and pressure of 2.0 bar. The results showed that the MCM-22 zeolite membrane by DC had the final value of the permeate concentration of 3.2 mg/L and the membrane prepared by VPT presented a final value of 3.9 mg/L which were within the standards required by Resolution No. 392 of CONAMA which is up to 20 mg/L of mineral oils.

The Investigation of Preparing the Beta Zeolite Membrane by the Way of Secondary Growth

2012 ◽  
Vol 608-609 ◽  
pp. 1463-1466 ◽  
Author(s):  
Guo Lin Shao ◽  
Chun Ling Yu ◽  
Ying Huan Fu ◽  
Hong Yi Dai ◽  
Li Ping Zhang
Keyword(s):  
Secondary Growth ◽  
Dip Coating ◽  
Zeolite Membrane ◽  
Beta Zeolite ◽  
Self Assembling ◽  
Large Pore ◽  
Coating Method ◽  
Support Tube ◽  
Dip Coating Method ◽  
The Way

Beta zeolite membrane was prepared on the surface of α-Al2O3support tube with large pore by the way of secondary growth. Different seeding techniques, such as ultrasonic surge, self-assembling and dip-coating, were investigated, and the results indicated that the best one was dip-coating method for the support with large pore. The prepared membrane was characterized by SEM and XRD. It was proved that the beta zeolite membrane prepared by the way of secondary growth is continuous, dense and defect-free.

Preparation Uniform of TiO2 Microporous Ceramic Membrane Supported by Al2O3

2016 ◽  
Vol 697 ◽  
pp. 101-104
Author(s):  
Xin Zhang ◽  
Gai Ye Li ◽  
Jian Feng Zhang
Keyword(s):  
Ceramic Membrane ◽  
Dip Coating ◽  
Thickening Agent ◽  
Casting Solution ◽  
Ceramic Support ◽  
Coating Method ◽  
The Stability ◽  
Dip Coating Method ◽  
Uniform Membrane

In this study, a TiO2 ceramic membrane was coated on the porous Al2O3 ceramic support by a dip-coating method using a self-designed apparatus. A flat, low-porous and uniform membrane was obtained based on the optimized ingredient and fluidity of TiO2 suspension. The effects of thickening agent content on the stability of the membrane casting solution and the microstructure of the membrane were investigated.

Porous Gel Coatings Obtained by Phase Separation in ORMOSIL System

2000 ◽  
Vol 628 ◽  
Author(s):  
Kazuki Nakanishi ◽  
Souichi Kumon ◽  
Kazuyuki Hirao ◽  
Hiroshi Jinnai
Keyword(s):  
Phase Separation ◽  
Reaction Time ◽  
Volume Fraction ◽  
Sol Gel ◽  
Reaction Times ◽  
Dip Coating ◽  
Coating Solution ◽  
Coating Method ◽  
Gel Phase ◽  
Dip Coating Method

ABSTRACTMacroporous silicate thick films were prepared by a sol-gel dip-coating method accompanied by the phase separation using methyl-trimethoxysilane (MTMS), nitric acid and dimethylformamide (DMF) as starting components. The morphology of the film varied to a large extent depending on the time elapsed after the hydrolysis until the dipping of the coating solution. On a glass substrate, the films prepared by early dipping had inhomogeneous submicrometer-sized pores on the surface of the film. At increased reaction times, relatively narrow sized isolated macropores were observed and their size gradually decreased with the increase of reaction time. On a polyester substrate, in contrast, micrometer-sized isolated spherical gel domains were homogeneously deposited by earlier dippings. With an increase of reaction time, the volume fraction of the gel phase increased, then the morphology of the coating transformed into co-continuous gel domains and macropores, and finally inverted into the continuous gel domains with isolated macropores. The overall morphological variation with the reaction time was explained in terms of the phase separation and the structure freezing by the forced gelation, both of which were induced by the evaporation of methanol during the dipping operation.

scholarly journals Preparation of Polypropylene/PVDF Composite Membrane by Dip-Coating Method

2021 ◽  
Vol 1115 (1) ◽  
pp. 012028
Author(s):  
P T P Aryanti ◽  
G Trilaksono ◽  
A Hotmaida ◽  
M A Afifah ◽  
F P Pratiwi ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Dip Coating ◽  
Coating Method ◽  
Dip Coating Method

Characterization of UHMWPE- HAp coating produced by dip coating method on Ti6Al4V alloy

2021 ◽  
pp. 127091
Author(s):  
Gözde Çelebi Efe ◽  
Elif Yenilmez ◽  
İbrahim Altinsoy ◽  
Serbülent Türk ◽  
Cuma Bindal
Keyword(s):  
Dip Coating ◽  
Ti6al4v Alloy ◽  
Coating Method ◽  
Dip Coating Method

scholarly journals The Effect of Film Thickness and Content on Film Formation from PS/ Nanocomposites Prepared by Dip-Coating Method

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
M. Selin Sunay ◽  
Onder Pekcan ◽  
Saziye Ugur
Keyword(s):  
Film Thickness ◽  
Elevated Temperatures ◽  
Film Formation ◽  
Fluorescence Emission ◽  
Dip Coating ◽  
Atomic Force ◽  
Annealing Step ◽  
Coating Method ◽  
Fluorescence Emission Intensity ◽  
Dip Coating Method

Steady-state fluorescence (SSF) technique in conjunction with UV-visible (UVV) technique and atomic force microscope (AFM) was used for studying film formation from TiO2covered nanosized polystyrene (PS) latex particles (320 nm). The effects of film thickness and TiO2content on the film formation and structure properties of PS/TiO2composites were studied. For this purpose, two different sets of PS films with thicknesses of 5 and 20 μm were prepared from pyrene-(P-) labeled PS particles and covered with various layers of TiO2using dip-coating method. These films were then annealed at elevated temperatures above glass transition temperature () of PS in the range of 100–280°C. Fluorescence emission intensity, from P and transmitted light intensity, were measured after each annealing step to monitor the stages of film formation. The results showed that film formation from PS latexes occurs on the top surface of PS/TiO2composites and thus developed independent of TiO2content for both film sets. But the surface morphology of the films was found to vary with both TiO2content and film thickness. After removal of PS, thin films provide a quite ordered porous structure while thick films showed nonporous structure.

Preparation and properties of polyurethane coatings modified by polysilazane

2019 ◽  
Vol 32 (6) ◽  
pp. 611-619 ◽  
Author(s):  
Xiaoli Liu ◽  
Zhen Ge ◽  
Wenguo Zhang ◽  
Yunjun Luo
Keyword(s):  
Mechanical Property ◽  
Photoelectron Spectroscopy ◽  
Composite Coatings ◽  
Composite Films ◽  
Dip Coating ◽  
Water Contact ◽  
Research Attention ◽  
Elongation At Break ◽  
Coating Method ◽  
Dip Coating Method

Due to their unique physicochemical properties, polysilazanes exhibit excellent performance when combined with some resin matrixes, which had drawn great research attention. In this article, polyurethane (PU) was firstly prepared by polytetrahydrofuran glycol, isophorone diisocyanate, and 1,4-butanediol as main materials. Then, the prepared PU was blended with polysilazane by mixing the two solutions together, which was cured to films via dip-coating method at room temperature. The structure, thermal stability, and surface properties of the composite coatings were investigated by Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy. The results demonstrated that after modification with polysilazane, the heat resistance, hydrophobicity, and mechanical property of the PU coatings were improved. When the content of polysilazane was 6 wt%, the mechanical property of the composite films was optimized, with a maximum tensile strength of 25.7 MPa and elongation at break of 797%. Meanwhile, the water contact angle of the composite film was 107° and the water absorption reached a minimum of 2.1%, which showed improved hydrophobicity and water resistance.

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