ISO 15901-2:2006
Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Part 2: Analysis of mesopores and macropores by gas adsorption

Standard No.

ISO 15901-2:2006

Release Date

2006

Published By

International Organization for Standardization (ISO)

Status

Be replaced

Replace By

ISO 15901-2:2006/cor 1:2007

Latest

ISO 15901-2:2022

Scope

This part of GB/T 21650 specifies a method for determining porosity and pore size distribution using the gas adsorption method, which is used for comparative rather than absolute testing. This method is limited to measuring the amount of gas adsorbed by unit mass sample under constant controlled temperature. This standard does not specify the use of specific adsorbent gases, but nitrogen is the most commonly used adsorbent gas and liquid nitrogen temperature is the most commonly used analytical temperature. Other adsorbent gases are sometimes used, including argon, carbon dioxide, and krypton. Other analysis temperatures are also used, including liquid argon and solid carbon dioxide temperatures: When using nitrogen for adsorption at liquid nitrogen temperature, the basic approach of the method is to determine the adsorbed amount of nitrogen at 77 K as a function of its relative pressure. This section specifies the calculation method for the pore size distribution of mesopores from 2 nm to 50 nm and the pore size distribution of macropores with pore sizes up to 100 nm. Generally speaking, nitrogen adsorption is most suitable for a width of about O. Determination of pores in the range of 4 nm to 50 nm. Due to advances in temperature control and pressure measurement technology, it is now possible to determine larger pore widths. The methods specified in this section are applicable to a wide range of porous materials. Even the pore structure of certain materials can sometimes be affected by pretreatment or cooling regimes. This section specifies two types of methods for determining the amount of gas adsorbed: 　——measuring the amount of gas reduced from the gas phase (i.e. gas volume method); 　——measuring the amount of gas obtained by the adsorbent (i.e. gravimetric method of directly measuring mass increment) . In practical applications, static or dynamic techniques can be used to determine the amount of gas adsorbed. In order to calculate the pore volume and pore size distribution from isotherms, one or more mathematical models are required, which requires simplification of the basic assumptions.

ISO 15901-2:2006 Referenced Document

• GB 3101 Quantities and units--General principles
• GB/T 19587 Determination of the specific surface area of solids by gas adsorption using the BET method*， 2017-09-29 Update
• ISO 8213 Chemical products for industrial use; Sampling techniques; Solid chemical products in the form of particles varying from powders to coarse lumps
• ISO 9276-1 Representation of results of particle size analysis — Part 1: Graphical representation TECHNICAL CORRIGENDUM 1

ISO 15901-2:2006 history

• 2022 ISO 15901-2:2022 Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption — Part 2: Analysis of nanopores by gas adsorption
• 2007 ISO 15901-2:2006/cor 1:2007 Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Part 2: Analysis of mesopores and macropores by gas adsorption; Technical Corrigendum 1
• 2006 ISO 15901-2:2006 Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Part 2: Analysis of mesopores and macropores by gas adsorption