ISO 17225-8:2023 PDF

Solid biofuels — Fuel specifications and classes — Part 8: Graded thermally treated and densified biomass fuels for commercial and industrial use

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Title (English):

ISO 17225-8:2023

Solid biofuels — Fuel specifications and classes — Part 8: Graded thermally treated and densified biomass fuels for commercial and industrial use

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 17
Publication date:: March 6, 2023
Edition:: ISO IS 17225 edition 1 version 1
ICS:: 27.190

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Description (English):

This document determines the fuel quality classes and specifications of graded densified solid biofuels produced from thermally treated biomass for commercial applications and industrial use. This document covers pellets and briquettes produced from the following raw materials (see ISO 17225‑1:2021, Table 1): — woody biomass; — herbaceous biomass; — fruit biomass; — aquatic biomass; — blends and mixtures. Subcategories of these raw materials are included. This document does not consider products which are marketed as charcoal or as charcoal products. For these products, see ISO 17225‑1:2021, Table 14. NOTE Health, safety and environmental issues for solid biofuels are important and need special attention; however, they are outside the scope of this document.

Technical details

Technical committee: ISO/TC 238 - Solid biofuels
SKU: ISO 17225-8:2023

Abstract

Overview

ISO 17225-8:2023 - "Solid biofuels - Fuel specifications and classes - Part 8" defines fuel quality classes and specifications for graded thermally treated and densified biomass fuels (pellets and briquettes) intended for commercial and industrial use. The standard covers fuels produced from woody, herbaceous, fruit, aquatic biomass and blends, specifies how properties are declared (including energy-related units), and provides templates and reference values to support consistent product specification and trading. Charcoal products are excluded (see ISO 17225‑1:2021).

Key topics and requirements

Scope of materials: Pellets and briquettes from thermally treated biomass (e.g., torrefaction, steam explosion, hydrothermal carbonization, charring).
Fuel classes and properties: Normative property classes for mechanical, physical and chemical parameters are given in Tables 1–3; ash and element concentrations are declared in energy units (g/MJ or mg/MJ, dry basis).
Mandatory analyses and sampling: Sampling and sample prep according to ISO 18135 / ISO 21945 and ISO 14780; analytical methods referenced for moisture, calorific value, ash, elemental analysis, durability, fines, bulk density, dimensions (see Normative references).
Declaration and traceability: Producers/suppliers must state the quality class at delivery and include both energy-based and mass-based values (e.g., mg/kg dry). Distributors must maintain fines levels during transport.
Specification tools: Annex A provides a template for product specification; Annex B supplies reference values for converting limits to energy-based units.
Safety note: Health, safety and environmental aspects are acknowledged as important but are outside the document’s technical scope.

Practical applications and users

ISO 17225-8:2023 is intended for:

Fuel producers and densification plants producing thermally treated pellets/briquettes.
Commercial and industrial energy users (boilers, furnaces) and equipment manufacturers who require classified fuel quality.
Traders, distributors and buyers who need standardized quality classes for procurement and contracts.
Testing laboratories and conformity assessors performing sampling and analyses according to referenced ISO methods. Practical benefits include clearer contracts, improved market transparency, easier communication with equipment manufacturers, and support for permitting and reporting.

Related standards

Key supporting standards referenced:

ISO 17225-1:2021 (general requirements and charcoal specification)
ISO 18125 (calorific value), ISO 18134-1/2 (moisture), ISO 18122 (ash content)
ISO 17831-1/2 (mechanical durability), ISO 5370 (fines content)
ISO 16948, ISO 16968, ISO 16994 (elemental analyses)
ISO 17828, ISO 17829 (bulk density, pellet dimensions), ISO 18135 / ISO 21945 (sampling)

Keywords: ISO 17225-8:2023, solid biofuels, thermally treated biomass, pellets, briquettes, fuel specifications, densified biomass, commercial and industrial use.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and requirements

Scope of materials: Pellets and briquettes from thermally treated biomass (e.g., torrefaction, steam explosion, hydrothermal carbonization, charring).
Fuel classes and properties: Normative property classes for mechanical, physical and chemical parameters are given in Tables 1–3; ash and element concentrations are declared in energy units (g/MJ or mg/MJ, dry basis).
Mandatory analyses and sampling: Sampling and sample prep according to ISO 18135 / ISO 21945 and ISO 14780; analytical methods referenced for moisture, calorific value, ash, elemental analysis, durability, fines, bulk density, dimensions (see Normative references).
Declaration and traceability: Producers/suppliers must state the quality class at delivery and include both energy-based and mass-based values (e.g., mg/kg dry). Distributors must maintain fines levels during transport.
Specification tools: Annex A provides a template for product specification; Annex B supplies reference values for converting limits to energy-based units.
Safety note: Health, safety and environmental aspects are acknowledged as important but are outside the document’s technical scope.

Practical applications and users

ISO 17225-8:2023 is intended for:

Fuel producers and densification plants producing thermally treated pellets/briquettes.
Commercial and industrial energy users (boilers, furnaces) and equipment manufacturers who require classified fuel quality.
Traders, distributors and buyers who need standardized quality classes for procurement and contracts.
Testing laboratories and conformity assessors performing sampling and analyses according to referenced ISO methods. Practical benefits include clearer contracts, improved market transparency, easier communication with equipment manufacturers, and support for permitting and reporting.

Related standards

Key supporting standards referenced:

ISO 17225-1:2021 (general requirements and charcoal specification)
ISO 18125 (calorific value), ISO 18134-1/2 (moisture), ISO 18122 (ash content)
ISO 17831-1/2 (mechanical durability), ISO 5370 (fines content)
ISO 16948, ISO 16968, ISO 16994 (elemental analyses)
ISO 17828, ISO 17829 (bulk density, pellet dimensions), ISO 18135 / ISO 21945 (sampling)

Keywords: ISO 17225-8:2023, solid biofuels, thermally treated biomass, pellets, briquettes, fuel specifications, densified biomass, commercial and industrial use.

ISO 17225-8:2023 PDF

Technical details

Abstract

Overview

Key topics and requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Practical applications and users

Related standards

Related standards

Solid biofuels — Fuel specifications and classes — Part 1: General requirements

Solid Biofuels - Sampling (ISO 18135:2017)

Solid biofuels - Simplified sampling method for small scale applications (ISO 21945:2020)

Solid biofuels - Sample preparation - Amendment 1 (ISO 14780:2017/Amd 1:2019)

Solid biofuels - Determination of calorific value (ISO 18125:2017)

Solid biofuels - Determination of moisture content - Part 1: Reference method (ISO 18134-1:2022)

Solid biofuels - Determination of ash content (ISO 18122:2022)

Solid biofuels - Determination of mechanical durability of pellets and briquettes - Part 1: Pellets (ISO 1783…