RS ISO 17225-7: 2014
Solid biofuels — Fuel specifications and classes — Part 7: Graded non-woody briquettes


This part of ISO 17225 determines the fuel quality classes and specifications of graded non-woody
briquettes. This part of ISO 17225 covers only non-woody briquettes produced from the following raw
materials (see ISO 17225-1, Table 1):
– 2 Herbaceous biomass
NOTE 1 Herbaceous biomass is from plants that have a non-woody stem and which die back at the end of the
growing season. It includes grains or seeds crops from food production or processing industry and their byproducts
such as cereals.
– 3 Fruit biomass
– 4 Aquatic biomass
– 5 Biomass blends and mixtures
NOTE 2 Group 5 Blends and mixtures include blends and mixtures from the main origin-based solid biofuel
groups woody, herbaceous biomass, fruit biomass and aquatic biomass.
Blends are intentionally mixed biofuels, whereas mixtures are unintentionally mixed biofuels. The
origin of the blend and mixture is to be described using ISO 17225-1, Table 1.
If solid biofuel blend or mixture contains chemically treated material it shall be stated.
NOTE 3 Thermally treated biomass briquettes (e.g. torrefied briquettes) are not included in the scope of this
part of ISO 17225. Torrefaction is a mild pre-treatment of biomass at a temperature between 200 – 300 °C.

General Information

RS ISO 17225-7: 2014ADOPTED ISO STANDARDSEnergy and heat transfer engineering19First Edition
Dec 2015
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