Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)

2015 ◽  
Vol 87 (9-10) ◽  
pp. 1051-1069 ◽  
Author(s):  
Matthias Thommes ◽  
Katsumi Kaneko ◽  
Alexander V. Neimark ◽  
James P. Olivier ◽  
Francisco Rodriguez-Reinoso ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Special Reference ◽  
Pore Size ◽  
Surface Area ◽  
Gas Adsorption ◽  
Porous Solids ◽  
Size Analysis ◽  
Fine Powders ◽  
Pore Size Analysis ◽  
Technical Report

AbstractGas adsorption is an important tool for the characterisation of porous solids and fine powders. Major advances in recent years have made it necessary to update the 1985 IUPAC manual on Reporting Physisorption Data for Gas/Solid Systems. The aims of the present document are to clarify and standardise the presentation, nomenclature and methodology associated with the application of physisorption for surface area assessment and pore size analysis and to draw attention to remaining problems in the interpretation of physisorption data.

Physisorption of Gases, With Special Reference to the Evaluation of Surface Area and Pore Size Distribution (IUPAC Technical Report)

2016 ◽  
Author(s):  
Matthias Thommes ◽  
Katsumi Kaneko ◽  
Alexander V. Neimark ◽  
James P. Olivier ◽  
Francisco Rodriguez-Reinoso ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Special Reference ◽  
Pore Size ◽  
Size Distribution ◽  
Surface Area ◽  
Technical Report

Characterization of Virtual Nano-Structures through the Use of Monte Carlo Integration

2008 ◽  
Vol 32 ◽  
pp. 275-278 ◽  
Author(s):  
Luis F. Herrera ◽  
Duong D. Do ◽  
Greg R. Birkett
Keyword(s):  
Monte Carlo ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Surface Area ◽  
Molecular Model ◽  
Monte Carlo Integration ◽  
Porous Solids ◽  
Molecular Models ◽  
Novel Materials

The determination of the properties of porous solids remains an integral element to the understanding of adsorption, transport and reaction processes in new and novel materials. The advent of molecular simulation has led to an improved understanding and prediction of adsorption processes using molecular models. These molecular models have removed the constraints of traditional adsorption theories, which require rigid assumptions about the structure of a material. However, even if we possess a full molecular model of a solid, it is still desirable to define the properties of this solid in a standard manner with quantities such as the accessible volume, surface area and pore size distribution. This talk will present Monte Carlo integration methods for calculating these quantities in a physically meaningful and unambiguous way. The proposed methods for calculating the surface area and pore size distribution were tested on an array of idealised solid configurations including cylindrical and cubic pores. The method presented is adequate for all configurations tested giving confidence to its applicability to disordered solids. The method is further tested by using several different noble gas probe molecules. Finally, the results of this technique are compared against those obtained by applying the BET equation for a range of novel materials.

scholarly journals The Removal of Reactive Red 141 from Wastewater: A Study of Dye Adsorption Capability of Water-Stable Electrospun Polyvinyl Alcohol Nanofibers

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Çigdem Akduman ◽  
Seniha Morsümbül ◽  
Emriye Perrin Akçakoca Kumbasar
Keyword(s):  
Polyvinyl Alcohol ◽  
Pore Size ◽  
Surface Area ◽  
Dye Adsorption ◽  
Size Analysis ◽  
Pore Size Analysis ◽  
Electrospinning Method ◽  
Nanofiber Membranes ◽  
Nanofibrous Membranes ◽  
Adsorption Capability

Abstract The dye production and its use in textile and related industries resulted in discharge of dye to wastewater. Adsorption for color removal is known as equilibrium separation process, and the resultant decolorization is influenced by physicochemical factors such as adsorbent surface area. The nanofiber membranes prepared by the electrospinning method have controllable nanofiber diameter and pore size distribution (PSD) with a high surface area to volume or mass ratio. In this study, polyvinyl alcohol (PVA) nanofibrous membranes were prepared by the electrospinning method at different collection times such as 3, 5 and 10 h and heat fixated at 130, 150 and 170°C for 10 min, and then, the adsorption capability of PVA nanofiber membranes for Reactive Red 141 from aqueous solution was investigated. In order to make PVA nanofibers stable to water, the nanofibrous membranes were chemically cross-linked by a polycarboxylic acid (1,2,3,4 butanetetracarboxylic acid (BTCA)). PVA nanofibrous membranes were characterized by scanning electron microscopy, thermogravimetric analysis, swelling tests and pore size analysis. The results indicated that BTCA crosslinking improved the thermal and water stability of the nanofibrous structure but has no significant effect on the pore sizes of the membranes. Adsorption of Reactive Red 141 was studied by the batch technique, and it was observed that PVA nanofibers removed approximately >80% of the dye.

Effects of the Physical Structure of Alumina/Copper Oxide Solids On Their Reactivity for SO2 Removal From Flue Gases

1994 ◽  
Vol 344 ◽  
Author(s):  
Laurent A. Dall'aglio ◽  
Stratis V. Sotirchos
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Surface Area ◽  
Flue Gas ◽  
Gas Adsorption ◽  
Mercury Porosimetry ◽  
Physical Structure ◽  
Bimodal Pore Size Distribution ◽  
Effect Of Copper

AbstractCuO/Al2O3 sorbents based on three aluminas of different pore structure and surface area around 125 m2/g were prepared. Two of the aluminas exhibited bimodal pore size distribution, while the third had narrow unimodal distribution. The effect of copper loading on the physical characteristics of the aluminas (pore size distribution and surface area) was examined using mercury porosimetry and gas adsorption. The reactivity of the sorbents towards SO2 was investigated by carrying out thermogravimetric experiments using simulated flue gas.

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