ISO 23604:2022 PDF

Method of determining specific surface area of coal

Open preview (PDF)

Title (English):

ISO 23604:2022

Method of determining specific surface area of coal

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 11
Publication date:: November 21, 2022
Edition:: ISO IS 23604 edition 1 version 1
ICS:: 73.040

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

This document provides a method for determining the specific surface area of solid materials using gas adsorption. This document is applicable to the determination of specific surface area of coal, and other powder and porous materials including nano-powders and nano-grade porous materials with a determination range of 0,001 m2/g to 1 000 m2/g.

Technical details

Technical committee: ISO/TC 263 - Coalbed methane (CBM)
SKU: ISO 23604:2022

Abstract

Overview

ISO 23604:2022 - Method of determining specific surface area of coal - specifies a gas-adsorption volumetric method to determine the specific surface area of coal and other powder or porous materials (including nano-powders). The method covers a broad determination range (0.001 m2/g to 1 000 m2/g) and defines procedures from sample preparation and degassing through adsorption isotherm measurement and surface-area calculation.

Key topics and technical requirements

Principle: Specific surface area is derived from equilibrium gas adsorption at controlled temperature using theoretical models (e.g., BET).
Reagents & equipment: High‑purity gases (nitrogen ≥99.99 %, helium ≥99.99 %, CO2 ≥99.9 %), liquid nitrogen (77 K), and a specific surface area analyser with degasser, manifold, valves, vacuum pump and temperature probes.
Sample preparation:
- Fresh coal preferred; remove oxide layer or salts if present.
- Particle size and mass guidelines: typically 0.28–0.45 mm particle fraction; sample masses vary by lithology (e.g., 1–5 g).
- Air‑dry below 40 °C; seal and store in a desiccator.
Degassing and temperature control:
- Vacuum degassing to

Related standards

Other ISO standards

Overview

Key topics and technical requirements

Principle: Specific surface area is derived from equilibrium gas adsorption at controlled temperature using theoretical models (e.g., BET).
Reagents & equipment: High‑purity gases (nitrogen ≥99.99 %, helium ≥99.99 %, CO2 ≥99.9 %), liquid nitrogen (77 K), and a specific surface area analyser with degasser, manifold, valves, vacuum pump and temperature probes.
Sample preparation:
- Fresh coal preferred; remove oxide layer or salts if present.
- Particle size and mass guidelines: typically 0.28–0.45 mm particle fraction; sample masses vary by lithology (e.g., 1–5 g).
- Air‑dry below 40 °C; seal and store in a desiccator.
Degassing and temperature control:
- Vacuum degassing to

ISO 23604:2022 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

Systems and software engineering — Software life cycle processes

Asset management — Vocabulary, overview and principles

Asset management — Asset management system — Requirements

Information technology — Radio frequency identification device conformance test methods — Part 2: Test method…

Information technology — Multimedia framework (MPEG-21) — Part 22: User Description

Milk — Determination of the lactoperoxidase activity — Photometric method (Reference method)

Carbonaceous materials for the production of aluminium — Cold and tepid ramming pastes — Expansion/shrinkage…

Agricultural machinery — Safety — Part 13: Large rotary mowers