Sorption of Methane and Nitrogen on Cesium Exchanged Zeolite-X: Structure, Cation Position and Adsorption Relationship

2014 ◽  
Vol 53 (16) ◽  
pp. 6807-6814 ◽  
Author(s):  
Govind Sethia ◽  
Rajesh S. Somani ◽  
Hari C. Bajaj
Keyword(s):  
Zeolite X ◽  
Cation Position

Isotopenaustausch-Untersuchungen an Silicat-Ionenaustauschern

1969 ◽  
Vol 24 (11) ◽  
pp. 1784-1790 ◽  
Author(s):  
E. Hoinkis ◽  
H. Levi
Keyword(s):  
Alkaline Earth ◽  
Room Temperature ◽  
Isotopic Exchange ◽  
Activation Enthalpy ◽  
Fast Process ◽  
Zeolite X ◽  
Self Diffusion ◽  
Cation Position ◽  
High Diffusion Coefficient ◽  
Channel Systems

Abstract The isotopic exchange in Ba-and Sr-Zeolite X has been investigated over the entire range of the process. A special solution of the diffusion equation for the relevant case has been applied to evaluate self-diffusion measurements. The diffusion process was found to be non-uniform. It has been shown that 80% of the ex-changeable Ba-ions and 65% of the Sr-ions diffuse with a high diffusion coefficient and the remainder with a low one. They differ by four to five orders of magnitude at room temperature. In the temperature range 120° to 0 °C the activation enthalpy for the slow process is about twice as high as for the fast process. This behaviour is explaned in terms of cation location in the zeolite X lattice. The cations are accommodated in two types of channel systems which are assumed to be separated from each other at least with respect to alkaline earth ions. The cation position within the channel systems are discussed.

Adsorption of carbon monoxide, methane and nitrogen on alkaline earth metal ion exchanged zeolite-X: structure, cation position and adsorption relationship

RSC Advances ◽  
2015 ◽  
Vol 5 (17) ◽  
pp. 12773-12781 ◽  
Author(s):  
Govind Sethia ◽  
Rajesh S. Somani ◽  
Hari Chand Bajaj
Keyword(s):  
Carbon Monoxide ◽  
Metal Ion ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Adsorption Properties ◽  
Alkaline Earth Metal ◽  
Zeolite X ◽  
Zeolite Structure ◽  
Cation Position

The present study reports adsorption of carbon monoxide, methane and nitrogen on alkaline earth metal ion exchanged zeolite-X and relationship between zeolite structure, cation position and adsorption properties.

scholarly journals Silver quasi-nanoparticles: bridging the gap between clusters molecular-like and plasmonic nanoparticles

2021 ◽  
Author(s):  
Fatima Douma ◽  
Louwanda Lakiss ◽  
Oleg I. Lebedev ◽  
Julien Cardin ◽  
Krassimir L. Kostov ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Plasmonic Nanoparticles ◽  
Zeolite X ◽  
New Strategy ◽  
Type Zeolite ◽  
Optical Behavior ◽  
Silver Cations

Herein, we report a new strategy for preparing connected silver sub-nanoparticles with unique optical behavior via a selective photo-assisted electrochemical reduction of silver cations in FAU-type zeolite X (FAUX) cages....

scholarly journals Removal of organic pollutants from produced water by batch adsorption treatment

2021 ◽  
Author(s):  
Eman Hashim Khader ◽  
Thamer Jassim Mohammed ◽  
Nourollah Mirghaffari ◽  
Ali Dawood Salman ◽  
Tatjána Juzsakova ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Produced Water ◽  
Oxygen Demand ◽  
Powdered Activated Carbon ◽  
Pollutant Removal ◽  
Operating Conditions ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Zeolite X

AbstractThis paper studied the adsorption of chemical oxygen demand (COD), oil and turbidity of the produced water (PW) which accompanies the production and reconnaissance of oil after treating utilizing powdered activated carbon (PAC), clinoptilolite natural zeolite (CNZ) and synthetic zeolite type X (XSZ). Moreover, the paper deals with the comparison of pollutant removal over different adsorbents. Adsorption was executed in a batch adsorption system. The effects of adsorbent dosage, time, pH, oil concentration and temperature were studied in order to find the best operating conditions. The adsorption isotherm models of Langmuir, Freundlich and Temkin were investigated. Using pseudo-first-order and pseudo-second-order kinetic models, the kinetics of oil sorption and the shift in COD content on PAC and CNZ were investigated. At a PAC adsorbent dose of 0.25 g/100 mL, maximum oil removal efficiencies (99.57, 95.87 and 99.84 percent), COD and total petroleum hydrocarbon (TPH) were identified. Moreover, when zeolite X was used at a concentration of 0.25 g/100 mL, the highest turbidity removal efficiency (99.97%) was achieved. It is not dissimilar to what you would get with PAC (99.65 percent). In comparison with zeolites, the findings showed that adsorption over PAC is the most powerful method for removing organic contaminants from PW. In addition, recycling of the consumed adsorbents was carried out in this study to see whether the adsorbents could be reused. Chemical and thermal treatment will effectively regenerate and reuse powdered activated carbon and zeolites that have been eaten. Graphic abstract

Crystal structures of fully dehydrated fully Sr2+-exchanged zeolite X and of its ammonia sorption complex

1999 ◽  
Vol 30 (2-3) ◽  
pp. 233-241 ◽  
Author(s):  
Mi Jung Kim ◽  
Mi Suk Jeong ◽  
Yang Kim ◽  
Karl Seff
Keyword(s):  
Crystal Structures ◽  
Zeolite X

ChemInform Abstract: Promotion Effect of Fe on the Selectivity of Pd Zeolite-X in Methanol Synthesis.

ChemInform ◽  
1990 ◽  
Vol 21 (23) ◽  
Author(s):  
B. M. CHOUDARY ◽  
K. LAZAR ◽  
I. BOGYAY ◽  
L. GUCZI
Keyword(s):  
Methanol Synthesis ◽  
Zeolite X ◽  
Promotion Effect

In situ infrared and EXAFS studies of an Ag cluster in zeolite X

Polyhedron ◽  
2005 ◽  
Vol 24 (5) ◽  
pp. 685-691 ◽  
Author(s):  
Yushi Suzuki ◽  
Naoyuki Matsumoto ◽  
Takeshi Ainai ◽  
Takafumi Miyanaga ◽  
Hideoki Hoshino
Keyword(s):  
Zeolite X ◽  
Ag Cluster

The promoting effects of alkali metal oxide in side-chain alkylation of toluene with methanol over basic zeolite X

2016 ◽  
Vol 234 ◽  
pp. 61-72 ◽  
Author(s):  
He Han ◽  
Min Liu ◽  
Xiaowa Nie ◽  
Fanshu Ding ◽  
Yiren Wang ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Metal Oxide ◽  
Side Chain ◽  
Zeolite X ◽  
Alkali Metal Oxide
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