A-1 Preparation of Micro-porous Alumina Support by Extrusion(Session: Ceramics I)

2006 ◽  
Vol 2006 (0) ◽  
pp. 1
Author(s):  
Khanthima Hemra ◽  
Duangduen Atong ◽  
Pavadee Aungkavattana
Keyword(s):  
Porous Alumina ◽  
Alumina Support

Fabrication and Microstructure of ZnO-TiO2 Composite Membranes by a Reverse Micelle and Sol-Gel Processing

2006 ◽  
Vol 510-511 ◽  
pp. 786-789 ◽  
Author(s):  
Dong Sik Bae ◽  
Byung Ik Kim ◽  
Kyong Sop Han
Keyword(s):  
Particle Size ◽  
Reverse Micelle ◽  
Porous Alumina ◽  
Sol Gel ◽  
Average Particle Size ◽  
Composite Membranes ◽  
Dip Coating ◽  
Narrow Particle Size Distribution ◽  
Average Particle ◽  
Alumina Support

ZnO-TiO2 nanoparticles were synthesized by a reverse micelle and sol-gel process. The average particle size of the colloid was below 30 nm and well dispersed in the solution. ZnOTiO2 composite membranes were fabricated by using the dip-coating method on a porous alumina support. ZnO-TiO2 composite membranes showed a crack-free microstructure and narrow particle size distribution even after the heat treatment up to 600°C. The average particle size of the membrane was 30-40nm, and the pore size of ZnO-TiO2 composite membrane was below 10 nm.

Synthesis of MCM-22 Zeolite Membrane on a Porous Alumina Support

2014 ◽  
Vol 805 ◽  
pp. 272-278 ◽  
Author(s):  
Antonielly dos S. Barbosa ◽  
Antusia dos S. Barbosa ◽  
Meiry Glaucia F. Rodrigues
Keyword(s):  
Porous Alumina ◽  
Mercury Porosimetry ◽  
Secondary Growth ◽  
Molecular Size ◽  
Zeolite Membrane ◽  
X Ray Diffraction ◽  
Alumina Support ◽  
X Ray ◽  
Ceramic Support ◽  
Separation Of Mixtures

Much interest has been aroused in the application in industrial processes using zeolite membrane, due to its crystalline structure, and narrow pore diameters. These features enable the continuous separation of mixtures based on differences in molecular size and shape and also based on different adsorption properties. This paper reports the synthesis of MCM-22 zeolite membrane, using the method of secondary growth. The MCM-22 zeolite was synthesized by the hydrothermal method and characterized by spectroscopy Energy Dispersive X-ray (EDX), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM).The ceramic support (α-alumina) was prepared using the technique of forming powder and then subjected to the sintering temperature of 1400 °C/1h and characterized by XRD. The zeolite membrane preparation was performed by the method of secondary growth and characterized by XRD, SEM and mercury porosimetry. The obtained zeolite membrane could be confirmed by X-ray diffraction. From, the obtained SEM pictures it was possible to observe the formation of a homogeneous film on the zeolite surface of the ceramic support (α-alumina).

Fabrication and Properties of Alumina Flat Sheet Membrane Surports

2014 ◽  
Vol 955-959 ◽  
pp. 601-604
Author(s):  
De Xiang Liao ◽  
An Chao Geng ◽  
Peng Hao Su ◽  
Dao Lun Feng ◽  
Lin Lin Wang
Keyword(s):  
Sintering Temperature ◽  
Porous Alumina ◽  
Pure Water ◽  
Porous Ceramic ◽  
Water Flux ◽  
Carbon Powder ◽  
Pore Former ◽  
Alumina Support ◽  
Ceramic Support ◽  
Flat Sheet Membrane

The porous ceramic support was realized at various temperature range from 1200°C~1300°C using α-Al2O3 as main material, carbon powder as pore-former, kaolin clay and titanium dioxide as sintering aids and polyvinyl alcohol (PVA) as adhesives. The microstructures of sintered body were significantly affected by the amount of pore-former and sintering temperature. The results indicated that the porosity dramatically increased and the pore radius increased from 2.9 μm to 3.2 μm as carbon powder addition increased from 3 wt.% to 12 wt.%. Correspondingly, their pure water flux depending on the pore structure parameters of the support increased from 1.37 to 4.53 m3.m-2.h-1.bar-1. To prepare porous alumina support with 40% open porosity, carbon powder up to 10 wt.% is appropriate. Sintering experiments showed that the optimum sintering conditions are the sintering temperature of 1300 °C and 2 h holding time at this temperature.

Infiltration of precursors into a porous alumina support for ZIF-8 membrane synthesis

2013 ◽  
Vol 168 ◽  
pp. 15-18 ◽  
Author(s):  
Lunxi Li ◽  
Jianfeng Yao ◽  
Rizhi Chen ◽  
Li He ◽  
Kun Wang ◽  
...  
Keyword(s):  
Porous Alumina ◽  
Membrane Synthesis ◽  
Alumina Support

Electroless Plating of Pd on Macro-Porous Alumina Support for H2 Purification

2016 ◽  
Vol 675-676 ◽  
pp. 556-559
Author(s):  
Kowit Lertwittayanon ◽  
Onuma Truektrong ◽  
Wanita Inthanu ◽  
Wirote Youravong
Keyword(s):  
Electroless Plating ◽  
Annealing Temperature ◽  
Metal Layer ◽  
Porous Alumina ◽  
Support Surface ◽  
Sem Images ◽  
Alumina Support ◽  
Porous Support ◽  
Small Cracks ◽  
Porous Disc

In this work, Pd metal layer was deposited on in-house prepared macro-porous disc alumina support by electroless plating. The in-house prepared support were repeatedly seeded for 4 cycles to obtain Pd nuclei before repeatedly electroless plated for 4 cycles. The 4-cycle Pd plating was to obtain the full layer of Pd metal observing from changing support surface from black to light grey. The plated membrane samples were annealed at 550 and 600oC for using in high-temperature H2 separation. The annealed samples were observed morphology by SEM and confirm the occurrence of Pd layer with EDS. The SEM images revealed incomplete Pd layer. The over 4 cycles of plating were needed to form complete Pd layer since the numerous Pd ions diffused into macro-pores alumina support instead of depositing on the surface of macro-porous support. The higher annealing temperature of 600oC led to denser layer of Pd with the presence of small cracks due to the contraction of Pd particles.

Selective Deposition of Pd on Porous Alumina Support Using Supercritical CO2

2002 ◽  
Vol 752 ◽  
Author(s):  
Masahiko Matsukata ◽  
Takashi Nishizuka ◽  
Yasushi Sekine ◽  
Eiichi Kikuchi
Keyword(s):  
Thermal Decomposition ◽  
Supercritical Co2 ◽  
Hydrogen Permeation ◽  
Porous Alumina ◽  
Diffusion Mechanism ◽  
Pore Filling ◽  
Alumina Support ◽  
Hydrogen Flux ◽  
Pd Membrane ◽  
High Separation

ABSTRACTA Pd/α-Al2O3 composite membrane was prepared on a porous α-Al2O3 disk via the thermal decomposition of bis(hexafluoroacetylacetonato)Pd(II), Pd(hfac)2. Pd(hfac)2 was dissolved in supercritical CO2 at 303 K, supplied to the substrate, and thermally decomposed at 403 and 443 K. The decomposition of Pd(hfac)2 at 443 K resulted in a sufficient pore filling of substrate with Pd as well as the formation of a thin Pd top layer. The hydrogen flux through this membrane was about 1.7 times than that of a electro-less plating Pd membrane with about 20 μm thick. Hydrogen permeation was governed by the solution-diffusion mechanism which gave a high separation selectivity.

An azine-linked covalent organic framework ACOF-1 membrane for highly selective CO2/CH4 separation

2018 ◽  
Vol 6 (35) ◽  
pp. 16849-16853 ◽  
Author(s):  
Hongwei Fan ◽  
Alexander Mundstock ◽  
Jiahui Gu ◽  
Hong Meng ◽  
Jürgen Caro
Keyword(s):  
Porous Alumina ◽  
Alumina Support ◽  
Covalent Organic Framework ◽  
Organic Framework

A defect-free and continuous 2D azine-linked ACOF-1 membrane on a porous alumina support is developed for highly selective CO2/CH4 separation.

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