scholarly journals A Comparison of Carbon Molecular Sieve (CMS) Membranes with Polymer Blend CMS Membranes for Gas Permeation Applications

2012 ◽  
Vol 12 (1) ◽  
pp. 51 ◽  
Author(s):  
W.Z. Wan Nurul Huda ◽  
M.A. Ahmad
Keyword(s):  
Molecular Sieve ◽  
Dip Coating ◽  
Gas Permeation ◽  
Gravimetric Analysis ◽  
Carbon Membrane ◽  
Carbon Molecular Sieve ◽  
Coating Solution ◽  
Poly Ethylene ◽  
Dip Coating Technique ◽  
Thermal Stability Of

In this work, polyetherimide (PEI) was used as a main precursor to prepare carbon molecular sieve (CMS) membranes coated on a porous α-alumina disk via inert pyrolysis process. The PEI precursor was modified by blending with poly(ethylene glycol) (PEG) and its effect on the gas transport property of carbon membrane pyrolyzed at 873K was examined. The coating solution was prepared by PEI diluted in N-methylpyrrolidone (NMP) and coated onto support by dip-coating technique. Uniform CMS membranes were obtained by repeated dip-coating and pyrolysis of PEI and PEI/PEG. The structure and the single gas permeation properties of PEI and PEI/PEG CMS membrane were investigated.The thermal stability of CMS membranes prepared was determined by thermal gravimetric analysis (TGA). Elemental analysis, scanning electron microscopy (SEM), and Attenuated Total Reflectance Infrared (ATR-IR) Spectroscopy were employed to characterize the resulting membranes. The gas permeation of the CMS membranes was tested using three gases: methane, carbon dioxide, and oxygen and performed at 298K. The best performance was obtained by using PEI/PEG CMS membrane, whereby CO2 permeability should be 400.44x10-10 mol.m-2.s-1.Pa-1.

scholarly journals P84 Co-polyimide/Nanocrystalline Cellulose (NCC)-based Tubular Carbon Membrane: Effect of Drying Times for Carbon Dioxide Separation at Elevated Carbonization Temperature

2018 ◽  
Vol 22 (1) ◽  
Author(s):  
N. Sazali ◽  
W. N. W. Salleh ◽  
K. Kadirgama
Keyword(s):  
Carbon Dioxide ◽  
Dip Coating ◽  
Gas Permeation ◽  
Carbonization Temperature ◽  
Nanocrystalline Cellulose ◽  
Carbon Membrane ◽  
Drying Time ◽  
Carbon Dioxide Separation ◽  
Membrane Performance ◽  
Dip Coating Technique

In this study, the effect of drying time on the performance of tubular carbon membrane was investigated. P84 co-polyimide blends with Nanocrystalline cellulose (NCC)-based carbon membrane supported on ceramic tube was fabricated through the dip-coating technique. This study aims to investigate the effect of various drying times (12 hours, 24 hours, 3 days and 7 days) on the carbon dioxide separation properties. The gas permeation test of the resultant tubular carbon membrane was determined by using pure gas of CO2 and N2. In order to enhance the membrane performance, final carbonization temperature was executed at 800oC in Argon environment with flow rate of 200 mL/min. From the results, it was found that the best drying times was within 24 hours and such membrane showed the highest CO2/N2 selectivity (66.32±2.18).

Preparation and Characterization of Matrimid-Based Carbon Membrane Supported on Tube for CO2 Separation

2014 ◽  
Vol 1025-1026 ◽  
pp. 770-775 ◽  
Author(s):  
W.N.W. Salleh ◽  
N.A.I.M. Isa ◽  
Norazlianie Sazali ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Morphological Structure ◽  
Dip Coating ◽  
Gas Permeation ◽  
Carbonization Temperature ◽  
Separation Performance ◽  
Carbon Membrane ◽  
Carbon Membranes ◽  
Dip Coating Technique ◽  
Gas Separation Performance

A series of research had been conducted to alter the performance of carbon membranes by manipulating the parameters during the fabrication process. In this study, the effects of carbonization temperature on the performance of carbon membrane were investigated. Matrimid-based carbon membrane supported on ceramic tube was fabricated through the dip-coating technique. The prepared membranes were characterized by using the scanning electron microscopy (SEM) and pure gas permeation test for the study on morphological structure and gas separation performance, respectively. The carbonization process was performed at different carbonization temperatures (600, 700, and 800 oC) for the same heating rate of 1 oC/min under Ar flow. The increment of carbonization temperature produced carbon membrane with small size of pores. The carbon membrane prepared at 800 oC showed the highest CO2/CH4 and CO2/N2 selectivity of 79.65 and 74.76, respectively.

High-performance carbon molecular sieve membranes for hydrogen purification and pervaporation dehydration of organic solvents

2019 ◽  
Vol 7 (12) ◽  
pp. 7082-7091 ◽  
Author(s):  
P. H. Tchoua Ngamou ◽  
M. E. Ivanova ◽  
O. Guillon ◽  
W. A. Meulenberg
Keyword(s):  
Organic Solvents ◽  
Molecular Sieve ◽  
High Performance ◽  
Elevated Temperatures ◽  
Hydrogen Purification ◽  
Carbon Membrane ◽  
Carbon Molecular Sieve ◽  
High Hydrogen ◽  
Hydrogen Permeance

Successful synthesis of a ceramic-supported ultrathin carbon membrane with unprecedently high hydrogen permeance and outstanding H2/CO2, H2/N2 and H2/CH4 selectivities at elevated temperatures.

Microstructure Control of Porous Alumina Film Using Aqueous Sol Containing Trehalose

2007 ◽  
Vol 350 ◽  
pp. 7-10 ◽  
Author(s):  
Takeshi Miki ◽  
Kaori Nishizawa ◽  
Kazuyuki Suzuki ◽  
Kazumi Kato
Keyword(s):  
Porous Alumina ◽  
Dip Coating ◽  
Alumina Film ◽  
Coating Solution ◽  
Coating Technique ◽  
Glass Substrates ◽  
Alumina Films ◽  
Maximum Thickness ◽  
Alumina Particles ◽  
Dip Coating Technique

To fabricate porous and thick alumina films, we prepared an aqueous alumina hydroxide sol containing trehalose. The alumina films were deposited by dip-coating technique on glass substrates and heating at 500 °C. The maximum thickness of the film obtained by one-run dip-coating using the sol containing trehalose was over 1000 nm. The film was an aggregate of alumina particles with a diameter of 20-40 nm and pores were interstices between the particles. The porosity of alumina film can be controlled in the range of 48-65 % by changing trehalose concentration in the dip-coating solution.

scholarly journals Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part I: Preparation, characterization and gas permeation studies

2015 ◽  
Vol 40 (16) ◽  
pp. 5653-5663 ◽  
Author(s):  
Margot A. Llosa Tanco ◽  
David A. Pacheco Tanaka ◽  
Sandra C. Rodrigues ◽  
Miguel Texeira ◽  
Adélio Mendes
Keyword(s):  
Molecular Sieve ◽  
Gas Permeation ◽  
Novolac Resin ◽  
Carbon Molecular Sieve ◽  
Permeation Studies

Effect of Polymer Concentration on Matrimid 5218 based-Carbon Membrane for H2 Separation

2020 ◽  
Vol 24 (1) ◽  
Author(s):  
Mohd Syafiq Sharip ◽  
Norazlianie Sazali ◽  
Fatin Nurwahdah Ahmad
Keyword(s):  
Polymer Solution ◽  
Gas Separation ◽  
Polymer Concentration ◽  
Dip Coating ◽  
Gas Permeation ◽  
Carbon Membrane ◽  
Structural Morphology ◽  
Tubular Membrane ◽  
Carbon Membranes ◽  
Coating Method

Hydrogen (H2)-based economy development is expected to create extensive need for efficient collecting strategies of fairly high purity H2. The aim of a H2-selective membrane is to manipulate H2’s high diffusivity characteristics as well as to restrict the outcome of lower solubility. Carbon membranes offer high potential in gas separation industry due to its highly permeable and selective. Therefore, this study aims to investigate the effect of carbonization parameter, i.e., polymer concentration on the gas separation properties. Matrimid 5218 was used as a precursor for carbon tubular membrane preparation to produce high quality of carbon membrane via carbonization process. The polymer solution was coated on the surface of tubular ceramic tubes using dip-coating method. Matrimid 5218-based carbon tubular membranes were fabricated and characterized in terms of its structural morphology, chemical structure, thermal stability, and gas permeation properties by using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and pure gas permeation system, respectively. The polymer solution containing 15 wt% Matrimid 5218 shows the best formulation for the preparation of Matrimid 5218-based carbon tubular membrane. The highest H2/N2 selectivity of 401.08±2.56 was obtained for carbon membrane carbonized at 800oC with heating rate of 2oC/min.

A Mini Review on Carbon Molecular Sieve Membrane for Oxygen Separation

2020 ◽  
Vol 4 (1) ◽  
pp. 23-35
Author(s):  
Fatin Nurwahdah Ahmad ◽  
Norazlianie Sazali ◽  
Mohd Hafiz Dzafran Othman
Keyword(s):  
Molecular Sieve ◽  
High Performance ◽  
Separation Performance ◽  
Carbon Membrane ◽  
Carbon Molecular Sieve ◽  
Carbon Membranes ◽  
Advantages And Disadvantages ◽  
Polymer Precursors ◽  
And Performance

Membrane-based technology has proved its practicality in gas separation through its performance. Various type of membranes has been explored, showing that each type of them have their own advantages and disadvantages. Polymeric membranes have been widely used to separate O2/N2, however, its drawbacks lead to the development of carbon molecular sieve membrane. Carbon molecular sieve membranes have demonstrated excellent separation performance for almost similar kinetic diameter molecules such as O2/N2. Many polymer precursors can be used to produce carbon molecular sieve membrane through carbonization process or also known as heat treatment. This paper discusses the variety of precursors and carbonization parameters to produce high quality and performance of carbon molecular sieve membranes.  This paper covers the evaluation in advancement and status of high-performance carbon membrane implemented for separating gas, comprising the variety of precursor materials and the fabrication process that involve many different parameters, also analysis of carbon membranes properties in separating various type of gas having high demand in the industries. The issues regarding the current challenges in developing carbon membrane and approaches with the purpose of solving and improving the performance and applications of carbon membrane are included in this paper. Also, the advantages of the carbon membrane compared to other types of membranes are highlighted. Observation and understanding the variables affecting the quality of membrane encourage the optimization of conditions and techniques in producing high-performance membrane.

Effects of Pyrolysis Temperature on the Properties of Phenol-Formaldehyde Resin Based Carbon Molecular Sieve Membrane

2016 ◽  
Vol 848 ◽  
pp. 738-742
Author(s):  
Jia Jia Li ◽  
Wei Wei ◽  
Qiang Lin ◽  
Jing Yi Zhang
Keyword(s):  
Pore Size ◽  
Molecular Sieve ◽  
Pyrolysis Temperature ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Membrane Properties ◽  
Formaldehyde Resin ◽  
Carbon Membrane ◽  
Carbon Molecular Sieve ◽  
Effective Pore Size

Carbon molecular sieve membranes were prepared by pyrolysis of novolac type phenol-formaldehyde resin. The influences of pyrolysis temperature on membrane properties were investigated. By raising the pyrolysis temperature from 600 oC to 700 oC, the number of pores and effective pore size increased, thereby making the carbon membrane more productive but less selective. When the pyrolysis temperature from 700 oC to 900 oC, the effective pore size was reduced by sinter effect, thereby the gas permeation rate decreased and selectivity increased. The carbon membranes were characterized by elemental analysis, X-ray diffraction (XRD), and CO2 adsorption. H2, N2, CH4, and O2 were used for pure gas tests to evaluate membrane performance.

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