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Does Particle Size of Clinoptilolite Zeolite Have a Role in Textural Properties? Insight through Differential Pore-Volume Distribution of Barret, Joyner, and Halenda Model

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Title Does Particle Size of Clinoptilolite Zeolite Have a Role in Textural Properties? Insight through Differential Pore-Volume Distribution of Barret, Joyner, and Halenda Model
Not Available
 
Creator K. Ramesh, K. Sammi Reddy, I. Rashmi, A. K. Biswas and K. R. Islam
 
Subject Adsorption, desorption, mesopores, micropores, texture
 
Description Not Available
Analysis of differential pore-volume distribution (PVD) patterns of commercial clinoptilolite
fractions [(250 μ (Z10; coarse)] has
been conducted experimentally using an analyzer to measure the nitrogen (N2) adsorption
isotherms. The differential PVDs of the clinoptilolite fractions were calculated from the
hysteresis loop according to the adsorption and desorption curves of the Barret, Joyner,
and Halenda (BJH) model. The adsorption and desorption cycles of BJH produced
heterogeneous as well as dissimilar differential PVD patterns with assorted peaks. While
the adsorption curve has prolonged up to 300 nm, the desorption cycle was confined up to
190-nm pore diameter only. In the adsorption cycle, all the clinoptilolite fractions displayed
U-shaped curves and had a differential pore volume in the range of 3 × 10–3 to
8 × 10–3 cm3/g A° in the micropore region with a sole peak at 1.75 nm for the fine fraction
(Z8). In contrast, the curves were linear in the mesoporous region for all the fractions, with
the fine fraction (Z8) having the greatest differential pore volume, whereas the other two
fractions were almost parallel to each other. The desorption cycle has revealed an inverted
V-shape curve with no definite patterns for the microporous region. Although the adsorption
cycle could ascertain the micropore region, the desorption cycle was unable to do so. It
was apparent from the differential PVD of the BJH model that fraction size has a major role
in determining the textural properties of clinoptilolite fractions
Not Available
 
Date 2021-08-25T04:38:48Z
2021-08-25T04:38:48Z
2015-07-18
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/60429
 
Language English
 
Relation Not Available;
 
Publisher Not Available