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GB/T 21650.3-2011 English PDF

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GB/T 21650.3-2011: Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption -- Part 3: Analysis of micropores by gas adsorption
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GB/T 21650.3-2011English514 Add to Cart 4 days [Need to translate] Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption -- Part 3: Analysis of micropores by gas adsorption Valid GB/T 21650.3-2011

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Basic data

Standard ID GB/T 21650.3-2011 (GB/T21650.3-2011)
Description (Translated English) Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption -- Part 3: Analysis of micropores by gas adsorption
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A28
Classification of International Standard 19.120
Word Count Estimation 26,279
Date of Issue 2011-06-16
Date of Implementation 2012-03-01
Quoted Standard GB/T 3723-1999; GB/T 21650.2-2008; ISO 8213-2007; ISO 9277-1995
Adopted Standard ISO 15901-3-2007, IDT
Regulation (derived from) Announcement of Newly Approved National Standards No. 9 of 2011
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the determination by cryogenic gas adsorption pore volume of microporous materials and specific surface area approach. This section applies to IUPAC classification ��, ��, �� or �� type isotherm (see GB/T 21650. 2-2008 in Figures 1 and ISO 9277-1995), this section does not apply to chemical adsorption or absorption.

GB/T 21650.3-2011: Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption -- Part 3: Analysis of micropores by gas adsorption


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Pore \u200b\u200bsize distribution and porosity of solid materials by mercury porosimetry and gas adsorption Part 3. Analysis of micropores by gas adsorption ICS 19.120 A28 National Standards of People's Republic of China Mercury porosimetry and gas adsorption method Solid materials porosity and pore size distribution Part 3. Analysis of micropores by gas adsorption Part 3. Analysisofmicroporesbygasadsorption (ISO 15901-3.2007, IDT) Issued on. 2011-06-16 2012-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 Symbol 3 PRINCIPLE 4 6 measuring step 6 7 instrument calibration 6 8 Calibration 6 9 pore volume assessment 6 10 of the report 14 Appendix A (Informative Appendix) Horvath-Kawazoe method and Saito-Foley method 16 Appendix B (Informative Appendix) NLDFT Act 18 References 20

Foreword

GB/T 21650 "Determination of mercury porosimetry and gas adsorption solid materials the pore size distribution and porosity" is divided into three parts. --- Part 1. Mercury; --- Part 2. Gas adsorption analysis mesopores and macropores; --- Part 3. Analysis of micropores by gas adsorption. This section GB/T Part of 321,650. 2007 "Determination solid materials the pore size distribution and porosity 3 mercury porosimetry and gas adsorption method. This section identical with ISO 15901-3 Part I. Analysis of micropores by gas adsorption "(in English). And ISO 15901-3.2007 as compared to this section made the following editorial changes. --- Deleted international standards foreword; --- The "ISO 15901 This part" to "this Part"; --- Revised 15901-3 ISO .2007 range; --- Of ISO 15901-3.2007 and other international standards referenced, equivalents adopted as our standard replaces the corresponding international standards quasi. It is not identical with direct reference to international standards for our standards; --- Deleted "3 Terms and definitions" in 3.3; --- Remove the "4 symbol" in Note 2 back passage; --- Deleted "7 Zxamining Europe and America standard reference material supplying communications and information"; --- Modify the abscissa in FIG. 3; --- The table in Appendix A A.2, "10 × 24cm3" to "10-24cm3". This section of the Appendix A, Appendix B is an informative annex. This part of the National and sorting method Standardization Technical Committee particles sieved (SAC/TC168) and focal points. This section is drafted. Beijing Physical and Chemical Analysis and Testing Center, the machine Productivity Promotion Center. The main drafters of this section. Zhou Suhong, Zou, Yu Fang, plateau, Wang Qifeng.

Introduction

Spectroscopy, electron microscopy and scanning tunneling microscopy and adsorption method. Given the complexity of the composition of most porous solids, obtained by various methods The results are not always consistent with each other, a technology alone can not give all the information pore structure. Taking into account the particular adsorbent, a molecular sieve, Application of the catalyst carrier and the biologically active substance and other porous materials, the scope of application of the selected gas adsorption method is particularly important. Due to the dispersed Porous material having a fractal, adsorption measurement result depends upon the size of the adsorbate gas molecules (the effective diameter of the solid surface And takes up space). In addition, there may not be larger molecules enter the pores, and is turning repulsion effect. Measurement techniques involved in this section, namely. low-temperature gas adsorption measurements and GB/T 21650.2-2008 and ISO 9277.1995 In a similar way; only part of the initial segment of the isotherm (such as. relative pressure < 10-1) was evaluated, and therefore different calculation methods. Mercury porosimetry and gas adsorption method Solid materials porosity and pore size distribution Part 3. Analysis of micropores by gas adsorption

1 Scope

This section GB/T 21650 specifies the assay microporous material by low surface area and pore volume of gas [1] - [7] method. This section applies to the IUPAC classification Ⅰ, Ⅱ, Ⅳ or Ⅵ isotherm (see GB/T 21650.2-2008 in FIG. 1 and ISO 9277.1995), this section does not apply to chemical adsorption or absorption.

2 Normative references

The following documents contain provisions which, through reference GB/T 21650 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section. However, under this part are encouraged to reach Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 3723-1999 Sampling of chemical products for industrial use General Safety (idt ISO 3165. 1976) GB/T 21650.2-2008 mercury porosimetry and gas adsorption of solid materials the pore size distribution and porosity Part 2. gas adsorption Attached Analysis of mesopores and macropores (ISO 15901-2.2007, IDT) ISO 8213.2007 Solid chemicals industrial chemicals sampling techniques from powders to coarse lumps of particles of different shapes ISO 9277.1995 Determination of solid material gas adsorption BET specific surface area method

3 Terms and Definitions

The following terms and definitions apply to this section. 3.1 Adsorbate adsorbate Adsorbed gas. [GB/T 21650.2-2008, Definition 3.1] 3.2 Adsorption adsorption Adsorbate outside the solid material enriched on the surface and the inner surface can be reached. [GB/T 21650.2-2008, the definition 3.4] 3.3 Adsorbent adsorbent Adsorption of solid material occurs. [GB/T 21650.2-2008, the definition 3.3] 3.4 Adsorption isotherm adsorptionisotherm At a constant temperature, the gas adsorption amount curve of a balance between the pressure of gas. [GB/T 21650.2-2008, the definition 3.10]

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