High Water Tolerance of a Core-Shell-Structured Zeolite for CO2 Adsorptive Separation under Wet Conditions

ChemSusChem ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 1756-1760 ◽  
Author(s):  
Manabu Miyamoto ◽  
Shumpei Ono ◽  
Kodai Kusukami ◽  
Yasunori Oumi ◽  
Shigeyuki Uemiya
Keyword(s):  
High Water ◽  
Core Shell ◽  
Adsorptive Separation ◽  
Water Tolerance

scholarly journals Maxwell-Stefan diffusion: a framework for predicting condensed phase diffusion and phase separation in atmospheric aerosol

2017 ◽  
Author(s):  
Kathryn Fowler ◽  
Paul J. Connolly ◽  
David O. Topping ◽  
Simon O'Meara
Keyword(s):  
Time Scales ◽  
Atmospheric Aerosol ◽  
Binary Systems ◽  
Aerosol Particles ◽  
High Water ◽  
Core Shell ◽  
Equilibration Time ◽  
Viscous Effects ◽  
Aerosol Composition ◽  
Exponential Factor

Abstract. The composition of atmospheric aerosol particles has been found to influence their micro-physical properties and their interaction with water vapour in the atmosphere. Core-shell models have been used to investigate the relationship between composition, viscosity and equilibration time-scales. These models have traditionally relied on the Fickian laws of diffusion with no explicit account of non-ideal interactions. We introduce the Maxwell-Stefan diffusion framework as an alternative method, which explicitly accounts for non-ideal interactions through activity coefficients. E-folding time is the time it takes for the difference in surface and bulk concentration to change by an exponential factor and was used to investigate the interplay between viscosity and solubility and the effect this has on equilibration time-scales within individual aerosol particles. The e-folding time was estimated after instantaneous increases in relative humidity to binary systems of water and an organic component. At low water mole fractions, viscous effects were found to dominate mixing. However, at high water mole fractions, equilibration times were more sensitive to a range in solubility, shown through the greater variation in e-folding times. This is the first time the Maxwell-Stefan framework has been applied to an atmospheric aerosol core-shell model and shows that there is a complex interplay between the viscous and solubility effects on aerosol composition that requires further investigation.

scholarly journals MgO Dispersed on Activated Carbon as Water Tolerant Catalyst for the Conversion of Ethanol into Butanol

2019 ◽  
Vol 9 (7) ◽  
pp. 1371 ◽  
Author(s):  
Stefano Cimino ◽  
Jessica Apuzzo ◽  
Luciana Lisi
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Fixed Bed ◽  
High Water ◽  
Fixed Bed Reactor ◽  
High Dispersion ◽  
Water Tolerance ◽  
Butanol Yield

MgO supported on activated carbon (AC) with a load ranging from 10% to 30% has been investigated as catalyst for the conversion of ethanol into butanol at 400 °C in a fixed bed reactor at different GHSV. Catalysts have been characterized by XRD, SEM/EDX, and N2 physisorption at 77 K. The high dispersion of MgO into the pores of the support provides strongly enhanced performance with respect to bulk MgO. MgO/AC catalysts have been also tested under wet feed conditions showing high water tolerance and significantly larger butanol yield with respect to an alumina supported Ru/MgO catalyst. After wet operation, the increased surface area of the catalyst leads to better performance once dry feed conditions are restored.

A novel interpenetrated anion-pillared porous material with high water tolerance afforded efficient C2H2/C2H4 separation

2019 ◽  
Vol 55 (34) ◽  
pp. 5001-5004 ◽  
Author(s):  
Lifeng Yang ◽  
Anye Jin ◽  
Lisha Ge ◽  
Xili Cui ◽  
Huabin Xing
Keyword(s):  
Porous Material ◽  
Metal Organic Framework ◽  
High Water ◽  
Separation Performance ◽  
Highly Efficient ◽  
Water Tolerance ◽  
Metal Organic ◽  
Organic Framework

A novel water stable interpenetrated anion-pillared metal-organic framework afforded highly efficient C2H2/C2H4 separation performance.

An alumina-supported silver catalyst with high water tolerance for H2 assisted C3H6-SCR of NOx

2017 ◽  
Vol 207 ◽  
pp. 60-71 ◽  
Author(s):  
Guangyan Xu ◽  
Jinzhu Ma ◽  
Guangzhi He ◽  
Yunbo Yu ◽  
Hong He
Keyword(s):  
High Water ◽  
Silver Catalyst ◽  
Water Tolerance ◽  
Scr Of Nox

A core–shell type alkyl-Sn-oxo cluster of {Sn14As16} bridged by 4-aminophenylarsonate ligands and incorporated with a {Na6} cluster

2020 ◽  
Vol 56 (9) ◽  
pp. 1433-1435
Author(s):  
Yu Zhu ◽  
Jian Zhang ◽  
Lei Zhang
Keyword(s):  
Potential Application ◽  
High Water ◽  
Type Structure ◽  
Core Shell ◽  
Water Stability ◽  
Shell Type

A large organotin-oxo arsonate cluster, {Na6Sn14As16}, with a core–shell type structure consisting of a {Na6} core and a {Sn14As16} shell is successfully constructed, which shows high water stability and has potential application as an electrode decoration material in CO2 reduction.

scholarly journals Maxwell–Stefan diffusion: a framework for predicting condensed phase diffusion and phase separation in atmospheric aerosol

2018 ◽  
Vol 18 (3) ◽  
pp. 1629-1642 ◽  
Author(s):  
Kathryn Fowler ◽  
Paul J. Connolly ◽  
David O. Topping ◽  
Simon O'Meara
Keyword(s):  
Atmospheric Aerosol ◽  
Binary Systems ◽  
Aerosol Particles ◽  
High Water ◽  
Core Shell ◽  
Viscous Effects ◽  
Aerosol Composition ◽  
Exponential Factor ◽  
Shell Models ◽  
The Difference

Abstract. The composition of atmospheric aerosol particles has been found to influence their micro-physical properties and their interaction with water vapour in the atmosphere. Core–shell models have been used to investigate the relationship between composition, viscosity and equilibration timescales. These models have traditionally relied on the Fickian laws of diffusion with no explicit account of non-ideal interactions. We introduce the Maxwell–Stefan diffusion framework as an alternative method, which explicitly accounts for non-ideal interactions through activity coefficients. e-folding time is the time it takes for the difference in surface and bulk concentration to change by an exponential factor and was used to investigate the interplay between viscosity and solubility and the effect this has on equilibration timescales within individual aerosol particles. The e-folding time was estimated after instantaneous increases in relative humidity to binary systems of water and an organic component. At low water mole fractions, viscous effects were found to dominate mixing. However, at high water mole fractions, equilibration times were more sensitive to a range in solubility, shown through the greater variation in e-folding times. This is the first time the Maxwell–Stefan framework has been applied to an atmospheric aerosol core–shell model and shows that there is a complex interplay between the viscous and solubility effects on aerosol composition that requires further investigation.

Self-driven membrane filtration by core–shell polymer composites

2020 ◽  
Vol 8 (31) ◽  
pp. 15942-15950 ◽  
Author(s):  
Zeou Dou ◽  
Ting Wang ◽  
Wensi Chen ◽  
Beichen Lin ◽  
Hai Dong ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Membrane Filtration ◽  
High Water ◽  
Core Shell ◽  
Water Absorbency ◽  
Filtration Process

A self-driven filtration process based on dynamic core–shell hydrogel absorbers of both high water absorbency and selectivity.

Core-shell PdO@SiO2/Al2O3 with sinter-resistance and water-tolerance promoting catalytic methane combustion

2020 ◽  
Vol 396 ◽  
pp. 125275 ◽  
Author(s):  
Xuelin Zou ◽  
Zilin Ma ◽  
Jiale Deng ◽  
Jiajin Zhong ◽  
Yunbing He ◽  
...  
Keyword(s):  
Methane Combustion ◽  
Core Shell ◽  
Water Tolerance
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