Kinetics of Isothermal Ethanol Adsorption onto a Carbon Molecular Sieve under Conventional and Microwave Heating

2012 ◽  
Vol 35 (4) ◽  
pp. 761-768 ◽  
Author(s):  
B. K. Adnadjević ◽  
J. D. Jovanović
Keyword(s):  
Microwave Heating ◽  
Molecular Sieve ◽  
Carbon Molecular Sieve ◽  
Ethanol Adsorption ◽  
Kinetics Of

Adsorption Equilibrium and Kinetics of Methane and Nitrogen on Carbon Molecular Sieve

2014 ◽  
Vol 53 (43) ◽  
pp. 16840-16850 ◽  
Author(s):  
Ying Yang ◽  
Ana M. Ribeiro ◽  
Ping Li ◽  
Jian-Guo Yu ◽  
Alirio E. Rodrigues
Keyword(s):  
Molecular Sieve ◽  
Adsorption Equilibrium ◽  
Carbon Molecular Sieve ◽  
Equilibrium And Kinetics ◽  
Adsorption Equilibrium And Kinetics ◽  
Kinetics Of

Adsorption Equilibrium and Kinetics of Branched Octane Isomers on a Polyvinylidene Chloride-Based Carbon Molecular Sieve

2008 ◽  
Vol 22 (4) ◽  
pp. 2641-2648 ◽  
Author(s):  
Georgina C. Laredo ◽  
Edith Meneses ◽  
Jesús Castillo ◽  
Jesús O. Marroquin ◽  
Federico Jiménez-Cruz
Keyword(s):  
Molecular Sieve ◽  
Adsorption Equilibrium ◽  
Carbon Molecular Sieve ◽  
Polyvinylidene Chloride ◽  
Equilibrium And Kinetics ◽  
Adsorption Equilibrium And Kinetics ◽  
Octane Isomers ◽  
Kinetics Of

Adsorption equilibria and kinetics of CO2, CO, and N2 on carbon molecular sieve

2019 ◽  
Vol 212 ◽  
pp. 952-964 ◽  
Author(s):  
Yongha Park ◽  
Dong-Kyu Moon ◽  
Dooyong Park ◽  
Masoud Mofarahi ◽  
Chang-Ha Lee
Keyword(s):  
Molecular Sieve ◽  
Carbon Molecular Sieve ◽  
Adsorption Equilibria ◽  
Kinetics Of

Equilibrium and Kinetics of Methane and Ethane Adsorption in Carbon Molecular Sieve

2016 ◽  
Vol 14 (4) ◽  
pp. 887-898 ◽  
Author(s):  
Babak Shirani ◽  
Mladen Eic
Keyword(s):  
Molecular Sieve ◽  
Surface Barrier ◽  
Diffusion Resistance ◽  
Carbon Molecular Sieve ◽  
Transfer Rates ◽  
Equilibrium And Kinetics ◽  
Different Temperatures ◽  
Uptake Data ◽  
Barrier Resistance ◽  
Kinetics Of

Abstract The comprehensive study involving uptake and kinetics behaviour of methane and ethane was carried out on a commercial carbon molecular sieve. The gravimetric technique was applied to measure the adsorption isotherms at different temperatures. The kinetic behaviours of methane and ethane were investigated by extracting the uptake data from isotherms at different pressure steps. Considering CMS as a homogenous microporous adsorbent, only two main resistances: surface barrier (at the pore mouth) and diffusion resistance (inside the pores) were considered in analysing the kinetic data. The kinetic analysis showed dominance of surface barrier resistance at all temperatures and pressures investigated in this study. Modified Darken equation was used to calculate the sorbates’ activation energies for adsorption in CMS pores. Compared to Darken equation, the modified Darken model predicted the concentration dependency of the surface rate constants more accurately, especially at higher sorbates’ concentrations. The activation energy of methane and ethane was greater than the heat of adsorption demonstrating a large impedance and barrier at the pore surface to the methane and ethane molecules. The kinetic selectivity of methane over ethane was calculated from the combined surface barrier/diffusion model parametric analysis. The results generally showed a greater selectivity to methane over ethane, i. e., the higher mass transfer rates.

scholarly journals A MEMS µ-Preconcentrator Employing a Carbon Molecular Sieve Membrane for Highly Volatile Organic Compound Sampling

Chemosensors ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 104
Author(s):  
Hung-Yang Kuo ◽  
Wei-Riu Cheng ◽  
Tzu-Heng Wu ◽  
Horn-Jiunn Sheen ◽  
Chih-Chia Wang ◽  
...  
Keyword(s):  
Organic Compound ◽  
Organic Compounds ◽  
Volatile Organic Compound ◽  
Molecular Sieve ◽  
Amplification Factor ◽  
Microfluidic Channel ◽  
Carbon Molecular Sieve ◽  
Volatile Organic ◽  
Chromatographic Peaks ◽  
Gaseous Toluene

This paper presents the synthesis and evaluation of a carbon molecular sieve membrane (CMSM) grown inside a MEMS-fabricated μ-preconcentrator for sampling highly volatile organic compounds. An array of µ-pillars measuring 100 µm in diameter and 250 µm in height were fabricated inside a microfluidic channel to increase the attaching surface for the CMSM. The surface area of the CMSM was measured as high as 899 m2/g. A GC peak amplification factor >2 × 104 was demonstrated with gaseous ethyl acetate. Up to 1.4 L of gaseous ethanol at the 100 ppb level could be concentrated without exceeding the capacity of this microchip device. Sharp desorption chromatographic peaks (<3.5 s) were obtained while using this device directly as a GC injector. Less volatile compounds such as gaseous toluene, m-xylene, and mesitylene appeared to be adsorbed strongly on CMSM, showing a memory effect. Sampling parameters such as sample volatilities, sampling capacities, and compound residual issues were empirically determined and discussed.

Carbon molecular sieve based micro-matrix-solid-phase dispersion for the extraction of polyphenols in pomegranate peel by UHPLC-Q-TOF/MS

2018 ◽  
Vol 39 (17) ◽  
pp. 2218-2227 ◽  
Author(s):  
Li-Jing Du ◽  
Jian-Ping Huang ◽  
Bin Wang ◽  
Chen-Hui Wang ◽  
Qiu-Yan Wang ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Solid Phase ◽  
Carbon Molecular Sieve ◽  
Pomegranate Peel ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Tof Ms
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