ISO 17225-1:2021 Solid biofuels — Fuel specifications and classes —Part 1: General requirements

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Solid biofuels — Fuel specifications and classes —

Part 1: General requirements

1 Scope

This document determines the fuel quality classes and specifications for solid biofuels of raw and processed materials originating from

a) forestry and arboriculture;

b) agriculture and horticulture;

c) aquaculture.

Chemically treated material may not include halogenated organic compounds or heavy metals at levels higher than those in typical virgin material values (see Annex B) or higher than typical values of the country of origin.

NOTE Raw and processed material includes woody, herbaceous, fruit, aquatic biomass and biodegradable waste originating from above sectors.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 14780, Solid biofuels — Sample preparation

ISO 16559, Solid biofuels — Terminology, definitions and descriptions

ISO 16948, Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen

ISO 16967, Solid biofuels — Determination of major elements — Al, Ca, Fe, Mg, P, K, Si, Na and Ti

ISO 16968, Solid biofuels — Determination of minor elements

ISO 16993, Solid biofuels — Conversion of analytical results from one basis to another

ISO 16994, Solid biofuels — Determination of total content of sulfur and chlorine

ISO 17827-1, Solid biofuels — Determination of particle size distribution for uncompressed fuels — Part 1: Oscillating screen method using sieves with apertures of 3,15 mm and above

ISO 17827-2, Solid biofuels — Determination of particle size distribution for uncompressed fuels — Part 2: Vibrating screen method using sieves with aperture of 3,15 mm and below

ISO 17828, Solid biofuels — Determination of bulk density

ISO 17829, Solid Biofuels — Determination of length and diameter of pellets

ISO 17830, Solid biofuels — Particle size distribution of disintegrated pellets

ISO 17831-1, Solid biofuels — Determination of mechanical durability of pellets and briquettes — Part 1: Pellets

ISO 17831-2, Solid biofuels — Determination of mechanical durability of pellets and briquettes — Part 2: Briquettes

ISO 18122, Solid biofuels — Determination of ash content

ISO 18123, Solid biofuels — Determination of the content of volatile matter

ISO 18125, Solid biofuels — Determination of calorific value

ISO 18134-1, Solid biofuels — Determination of moisture content — Oven dry method — Part 1: Total moisture — Reference method

ISO 18134-2, Solid biofuels — Determination of moisture content — Oven dry method — Part 2: Total moisture — Simplified method

ISO 18135, Solid Biofuels — Sampling

ISO 18847, Solid biofuels — Determination of particle density of pellets and briquettes

ISO 21945, Solid biofuels — Simplified sampling method for small scale applications

ISO 21404, Solid biofuels — Determination of ash melting behaviour

ISO 18846, Solid biofuels — Determination of fines content in quantities of pellets

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 16559 and the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp

— IEC Electropedia: available at http:// www .electropedia .org/ 3.1

chemical treatment

any treatment with chemicals other than air, water or heat

Note 1 to entry: Examples of chemical treatments are listed in informative Annex C.

3.2

commercial application

facility that utilize solid biofuel burning appliances or equipment that have similar fuel requirements as residential appliances

Note 1 to entry: Commercial applications should not be confused with industrial applications, which can utilize a much wider array of materials and have vastly different fuel requirements.

4 Symbols and abbreviated terms

The symbols and abbreviated terms used in this document conform with the SI system of units as far as possible,

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