Adsorption of carbon dioxide and nitrogen on zeolite rho prepared by hydrothermal synthesis using 18-crown-6 ether.

Zeolite rho was prepared by hydrothermal synthesis using an 18-crown-6 ether (18C6) as a structure-directing agent, and the effects of the calcination temperature for removal of 18C6 on the physicochemical properties and CO(2)-adsorption properties were investigated. CO(2) adsorption on zeolite rho calcined at 150°C was lower than that on samples calcined at temperatures above 300°C. For samples calcined above 300°C, CO(2) adsorption increased with increasing calcination temperature up to 400°C. It is thought that the pore volume for adsorption of CO(2) increased as a result of 18C6 removal, resulting in increasing CO(2) adsorption. A decrease in CO(2) adsorption for calcination from 400°C to 500°C was observed. The particle size of zeolite rho increased with increasing 18C6 molar ratio. Particle sizes of 1.0-2.1 μm and 1.4-2.6 μm were found by field-emission scanning electron microscopy and dynamic light-scattering, respectively. The particle size is controlled in these regions by adjusting the 18C6 molar ratio. XRD showed that zeolite rho samples with 18C6 molar ratios of 0.25-1.5 had high crystallinity. The adsorbed amount of CO(2) is almost constant, at 3.4 mmol-CO(2)g(-1), regardless of the 18C6 molar ratio. However, CO(2) selectivity, which is the CO(2)/N(2) adsorption ratio, decreased. The amount of CO(2) adsorbed on zeolite rho is lower than that on zeolite NaX, but higher than that on SAPO-34. The CO(2)/N(2) adsorption ratio for zeolite rho was higher than those for SAPO-34 and zeolite NaX.

[1]  Huanting Wang,et al.  CONTROLLING SIZE AND YIELD OF ZEOLITE Y NANOCRYSTALS USING TETRAMETHYLAMMONIUM BROMIDE , 2003 .

[2]  J. Patarin,et al.  Synthesis and characterization of high-silica zeolite RHO prepared in the presence of 18-crown-6 ether as organic template , 1995 .

[3]  J. W. Ward,et al.  The Infrared Spectra of Carbon Dioxide Adsorbed on Zeolite X , 1966 .

[4]  Christopher W. Jones,et al.  Adsorbent materials for carbon dioxide capture from large anthropogenic point sources. , 2009, ChemSusChem.

[5]  A. Zukal,et al.  Adsorption of Carbon Dioxide on High-Silica Zeolites with Different Framework Topology , 2010 .

[6]  Xiaoliang Xu,et al.  Adsorption separation of carbon dioxide, methane, and nitrogen on Hβ and Na-exchanged β-zeolite , 2008 .

[7]  M. V. Gil,et al.  Breakthrough adsorption study of a commercial activated carbon for pre-combustion CO2 capture , 2011 .

[8]  S. Tanaka,et al.  Mesoporous aluminosilicates assembled from dissolved LTA zeolite and triblock copolymer in the presence of tetramethylammonium hydroxide. , 2009, Journal of colloid and interface science.

[9]  A. Sacco,et al.  Selective N,N-methylation of aniline over cocrystallized zeolites RHO and zeolite X (FAU) and over Linde type L (Sr,K-LTL) , 2003 .

[10]  E Gallei,et al.  Infrared spectroscopic studies of the adsorption of carbon dioxide and the coadsorption of carbon dioxide and water on CaY- and NiY-zeolites☆ , 1976 .

[11]  V. Valtchev,et al.  Mechanism of zeolite A nanocrystal growth from colloids at room temperature. , 1999, Science.

[12]  Lorenz T. Biegler,et al.  Optimization of a Pressure-Swing Adsorption Process Using Zeolite 13X for CO2 Sequestration , 2003 .

[13]  Sadao Araki,et al.  Crystallization process of zeolite rho prepared by hydrothermal synthesis using 18-crown-6 ether as organic template. , 2012, Journal of colloid and interface science.

[14]  Sadao Araki,et al.  Preparation and CO(2) adsorption properties of aminopropyl-functionalized mesoporous silica microspheres. , 2009, Journal of colloid and interface science.

[15]  Xiaoliang Xu,et al.  Adsorption Behavior of Carbon Dioxide and Methane on AlPO4-14 : A Neutral Molecular Sieve , 2009 .

[16]  Shivaji Sircar,et al.  Pressure Swing Adsorption , 2002 .

[17]  D. Azevedo,et al.  Adsorption of CO2 on nitrogen-enriched activated carbon and zeolite 13X , 2011 .

[18]  Young Gun Ko,et al.  Primary, secondary, and tertiary amines for CO2 capture: designing for mesoporous CO2 adsorbents. , 2011, Journal of colloid and interface science.

[19]  Alírio E. Rodrigues,et al.  Adsorption Equilibrium of Methane, Carbon Dioxide, and Nitrogen on Zeolite 13X at High Pressures , 2004 .

[20]  A. Olajossy,et al.  Methane separation from coal mine methane gas by vacuum pressure swing adsorption , 2003 .

[21]  J. Falconer,et al.  SAPO-34 membranes for CO2/CH4 separation , 2004 .

[22]  Chang-Ha Lee,et al.  Adsorption Characteristics of Hydrogen Mixtures in a Layered Bed: Binary, Ternary, and Five-Component Mixtures , 2001 .

[23]  H. Habgood,et al.  AN INFRARED SPECTROSCOPIC STUDY OF THE ADSORPTION OF WATER AND CARBON DIOXIDE BY LINDE MOLECULAR SIEVE X1 , 1963 .