Chabazite-Type Zeolite Membranes for Effective CO2 Separation: The Role of Hydrophobicity and Defect Structure

2019 ◽  
Vol 11 (4) ◽  
pp. 3946-3960 ◽  
Author(s):  
Minseong Lee ◽  
Sungwon Hong ◽  
Dongjae Kim ◽  
Eunjoo Kim ◽  
Kyunghwan Lim ◽  
...  
Keyword(s):  
Defect Structure ◽  
Co2 Separation ◽  
Zeolite Membranes ◽  
Type Zeolite

scholarly journals Synthesis and Performance of Deca- Dodecasil 3 Rhombohedral (DDR)-Type Zeolite Membrane In CO2 Separation– A Review

2015 ◽  
Vol 14 (2) ◽  
pp. 48 ◽  
Author(s):  
Muhammad Mubashir ◽  
Yeong Yin Fong ◽  
Lau Kok Keong ◽  
Mohd. Azmi Bin Sharrif
Keyword(s):  
Secondary Growth ◽  
High Energy ◽  
Zeolite Membrane ◽  
Co2 Separation ◽  
Inorganic Membranes ◽  
Zeolite Membranes ◽  
Type Zeolite ◽  
And Performance ◽  
Cryogenic Distillation ◽  
Growth Methods

CO2 capture technologies including absorption, adsorption, and cryogenic distillation are reported. Conventional technologies for CO2 separation from natural gas have several disadvantages including high cost, high maintenance, occupy more space and consume high energy. Thus, membrane technology is introduced to separate CO2 due to their several advantages over conventional separation techniques. Inorganic membranes exhibit high thermal stability, chemical stability, permeability and selectivity for CO2 and CH4 separation as compared to other type of membranes. Zeolite membranes are potential for CO2 separation due to their characteristics such as, well define the pore structure and molecular sieving property. Among the zeolite membranes, DDR membranes exhibit highest selectivity for CO2 and CH4 separation. DDR membranes are synthesized by conventional hydrothermal and secondary growth methods. These methods required very long synthesis duration (25 days) due to extremely low nucleation and crystal growth rate of DDR zeolite. In this review, synthesis and performance of DDR membrane in CO2 separation from CH4 reported by various researchers are discussed. Challenges and upcoming guidelines related to the synthesis DDR membrane and performance of DDR membrane also included.

Influence of the hydrothermal synthetic parameters on the pervaporative separation performances of CHA-type zeolite membranes

2011 ◽  
Vol 143 (2-3) ◽  
pp. 270-276 ◽  
Author(s):  
Xiansen Li ◽  
Hidetoshi Kita ◽  
Hua Zhu ◽  
Zhenjia Zhang ◽  
Kazuhiro Tanaka ◽  
...  
Keyword(s):  
Zeolite Membranes ◽  
Type Zeolite ◽  
Separation Performances

Role of defect structure on hydrogenation properties of Zr 0.9 Ti 0.1 V 2 alloy

2011 ◽  
Vol 36 (15) ◽  
pp. 9318-9323 ◽  
Author(s):  
X.W. Yang ◽  
J.S. Li ◽  
T.B. Zhang ◽  
R. Hu ◽  
X.Y. Xue ◽  
...  
Keyword(s):  
Defect Structure

EFFECT OF SODA CONCENTRATION ON THE MORPHOLOGY OF MFI-TYPE ZEOLITE MEMBRANES

2008 ◽  
Vol 196 (1-2) ◽  
pp. 182-193 ◽  
Author(s):  
Belma Soydaş ◽  
Ali Çulfaz ◽  
Halil Kalipçilar
Keyword(s):  
Zeolite Membranes ◽  
Type Zeolite

Surface Defects in Drawn Aluminum Magnet Wire

1975 ◽  
Vol 97 (1) ◽  
pp. 134-141 ◽  
Author(s):  
R. N. Wright ◽  
A. T. Male
Keyword(s):  
Defect Structure ◽  
Surface Characterization ◽  
Surface Defect ◽  
Potential Role ◽  
Surface Defects ◽  
Repair Process ◽  
Fine Surface ◽  
Magnet Wire ◽  
Characterization Studies

The fine surface defect structure of commercial EC grade aluminum magnet wire has been characterized and four basic component types have been identified. A grading system has been established for each of the component defects. Intermediate process surface characterization studies and laboratory drawing experiments have been performed to clarify the origin of the defects. The potential role of drawing lubrication in repairing or compounding the defect structure has been demonstrated and the mechanics of a drawing related repair process have been clarified through study of the effects of rod drawing on hardness indentations.

scholarly journals Effect of seeding on the properties of MFI type zeolite membranes

Desalination ◽  
2006 ◽  
Vol 200 (1-3) ◽  
pp. 66-67 ◽  
Author(s):  
Eser Dinçer ◽  
Ali Çulfaz ◽  
Halil Kalipçilar
Keyword(s):  
Zeolite Membranes ◽  
Type Zeolite

scholarly journals Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation

Membranes ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 86 ◽  
Author(s):  
Kyohei Ueno ◽  
Saki Yamada ◽  
Toshinari Watanabe ◽  
Hideyuki Negishi ◽  
Takuya Okuno ◽  
...  
Keyword(s):  
Alternative Energy ◽  
Separation Performance ◽  
Water Mixture ◽  
Water Separation ◽  
Zeolite Membranes ◽  
Pure Silica ◽  
Large Pore ◽  
Silica Supports ◽  
Alcohol Water ◽  
Type Zeolite

Hydrophobic pure-silica *BEA-type zeolite membranes with large pores were prepared on tubular silica supports by hydrothermal synthesis using a secondary growth method and were applied to the separation of alcohol/water mixtures by pervaporation (PV), an alternative energy-efficient process for production of biofuels. Amorphous pure-silica tubular silica supports, free of Al atoms, were used for preparing the membranes. In this study, the effects of the synthesis conditions, such as the H2O/SiO2 and NH4F/SiO2 ratios in the synthetic gel, on the membrane formation process and separation performance were systematically investigated. The successfully prepared dense and continuous membranes exhibited alcohol selectivity and high flux for the separation of ethanol/water and butanol/water mixtures. The pure-silica *BEA membranes obtained under optimal conditions (0.08SiO2:0.5TEAOH:0.7NH4F:8H2O) showed high PV performance with a separation factor of 229 and a flux of 0.62 kg·m−2·h−1 for a 1 wt % n-butanol/water mixture at 318 K. This result was attributed to the hydrophobicity and large pore size of the pure-silica *BEA membrane. This was the first successful synthesis of hydrophobic large-pore zeolite membranes on tubular supports with alcohol selectivity, and the obtained results could provide new insights into the research on hydrophobic membranes with high permeability.

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