prEN ISO 17225-8

Solid biofuels - Fuel specifications and classes - Part 8: Graded thermally treated and densified biomass fuels (ISO/DIS 17225-8:2016)

This International Standards determines the fuel quality classes and specifications of graded pellets and briquettes made from thermally treated biomass for non-industrial and industrial use. This International Standard covers fuels produced from the following raw materials (see ISO 17225–1, Table 1):
1.1 Forest, plantation and other virgin wood
1.2 By-products and residues from wood processing industry
2.1 Herbaceous biomass from agriculture and horticulture
2.2.1 By-products and residues from food and herbaceous processing industry, chemically untreated herbaceous residues
3.1 Orchard and horticulture fruit
3.2.1 By-products and residues from food and fruit processing industry, chemically untreated fruit residues
4. Aquatic biomass

Biogene Festbrennstoffe - Brennstoffspezifikationen und -klassen - Teil 8: Klassifizierung von thermisch behandelten und gepressten Brennstoffen aus Biomasse (ISO/DIS 17225-8:2016)

Biocombustibles solides - Classes et spécifications des combustibles - Partie 8 (ISO/DIS 17225-8:2016)

Trdna biogoriva - Specifikacije in razredi goriv - 8. del: Sortirana termično obdelana in zgoščena goriva iz biomase (ISO/DIS 17225-8:2016)

General Information

• Status: Not Published
• Publication Date: 21-Aug-2017
• Withdrawal Date: 21-Feb-2018
• ICS: 27.190 - Biological sources and alternative sources of energy
• ICS: 75.160.10 - Solid fuels
• ICS: 75.160.40 - Biofuels
• Technical Committee: CEN/TC 335 - Solid biofuels
• Drafting Committee: CEN/TC 335 - Solid biofuels
• Current Stage: 4098 - Decision to abandon - Enquiry
• Start Date: 28-Jun-2016
• Completion Date: 14-Apr-2025
• Ref Project: oSIST prEN ISO 17225-8:2016 - Solid biofuels - Fuel specifications and classes - Part 8: Graded thermally treated and densified biomass fuels (ISO/DIS 17225-8:2016)

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2016
7UGQDELRJRULYD6SHFLILNDFLMHLQUD]UHGLJRULYGHO6RUWLUDQDWHUPLþQR
REGHODQDLQ]JRãþHQDJRULYDL]ELRPDVH,62',6
Solid biofuels - Fuel specifications and classes - Part 8: Graded thermally treated and
densified biomass fuels (ISO/DIS 17225-8:2016)
Biogene Festbrennstoffe - Brennstoffspezifikationen und -klassen - Teil 8: Klassifizierung
von thermisch behandelten und gepressten Brennstoffen aus Biomasse (ISO/DIS 17225-
8:2016)
Biocombustibles solides - Classes et spécifications des combustibles - Partie 8 (ISO/DIS
17225-8:2016)
Ta slovenski standard je istoveten z: prEN ISO 17225-8
ICS:
27.190 Biološki viri in drugi Biological sources and
alternativni viri energije alternative sources of energy
75.160.10 Trda goriva Solid fuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 17225-8
ISO/TC 238 Secretariat: SIS
Voting begins on: Voting terminates on:
2016-01-14 2016-04-14
Solid biofuels — Fuel specifications and classes —
Part 8:
Graded thermally treated and densified biomass fuels
Biocombustibles solides — Classes et spécifications des combustibles
ICS: 27.190; 75.160.10
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17225-8:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

ISO/DIS 17225-8:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2015 – All rights reserved

ISO/DIS 17225-8:2015
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviations . 3
5 Specification of graded pellets produced from thermally treated biomass . 4
6 Specification of graded briquettes produced from thermally treated biomass . 9
Bibliography . 14

iii
ISO/DIS 17225-8:2015
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national
standards bodies (ISO member bodies). The work of preparing International Standards is normally
carried out through ISO technical committees. Each member body interested in a subject for which a
technical committee has been established has the right to be represented on that committee.
International organizations, governmental and non-governmental, in liaison with ISO, also take part in
the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO's adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 238, Solid biofuels.
ISO 17225 consists of the following parts, under the general title Solid biofuels — Fuel specifications and
classes:
 Part 1: General requirements
 Part 2: Graded wood pellets
 Part 3: Graded wood briquettes
 Part 4: Graded wood chips
 Part 5: Graded firewood
 Part 6: Graded non-woody pellets
 Part 7: Graded non-woody briquettes
 Part 8: Graded thermally treated and densified biomass fuels
ISO/DIS 17225-8:2015
Introduction
The objective of this International Standard is to provide unambiguous and clear classification
principles for solid biofuels; to serve as a tool to enable efficient trading of biofuels; to enable good
understanding between seller and buyer as well as a tool for communication with equipment
manufacturers. It will also facilitate authority permission procedures and reporting.
This International Standard supports the use of thermally treated and densified biomass for household,
small commercial, public building as well as industrial energy generation applications, which require
classified quality.
Thermal treatment includes processes such as torrefaction, steam treatment (explosion pulping),
hydrothermal carbonization and charring, all of which represent different exposure to heat, oxygen,
steam or water. Thermally treated and densified biomass fuels should only be used in appliances with
manufacturer approval.
The household, small commercial and public building applications require higher quality fuel for the
following reasons:
 Small-scale equipment does not usually have advanced controls and flue gas cleaning
 Appliances are not generally managed by professional heating engineers or trained plant operators
 Appliances are often located in living and populated districts
NOTE 1 Pellets produced according to this International Standard may be used in pellet stoves, which are
[1] [2]
tested according to European Standard EN 14785 , pellet burners tested according to EN 15270 and pellet
[3]
.
boilers or integrated-pellet burner systems tested according to EN 303-5
NOTE 2 For individual contracts ISO 17225-1 should be used. ISO 17225-1 can be used for specification of
undensified thermally treated material and charcoal.
v
ISO/DIS 17225-8:2015
ISO/DIS 17225-8:2015
Solid biofuels — Fuel specifications and classes — Part 8: Graded
thermally treated and densified biomass fuels
1 Scope
This International Standard determines the fuel quality classes and specifications of graded densified
solid biofuels produced from thermally treated biomass for non-industrial and industrial use. This
International Standard covers pellets and briquettes produced from following raw materials (see ISO
17225–1, Table 1):
 1.1 Forest, plantation and other virgin wood
 1.2 By-products and residues from wood processing industry
 1.3.1 Chemically untreated wood
 2.1 Herbaceous biomass from agriculture and horticulture
 2.2.1 By-products and residues from food and herbaceous processing industry, chemically
untreated herbaceous residues
 3.1 Orchard and horticulture fruit
 3.2.1 By-products and residues from food and fruit processing industry, chemically untreated fruit
residues
 4. Aquatic biomass
Subcategories of the above stated raw materials are included.
This ISO standard does not consider products, which are marketed as charcoal or as charcoal products.
For these products ISO 17225-1 (Table 14) shall apply.
NOTE 1 For thermally treated powder Table 15 or Table 16 in ISO 17225-1 may be used for specification.
NOTE 2 Health, safety and environmental issues for solid biofuels are important and need special attention;
however they are outside the scope of this International Standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
1)
ISO 14780, Solid biofuels — Sample preparation
ISO 16559, Solid biofuels — Terminology, definition and description
ISO 16948, Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen
ISO 16968, Solid biofuels — Determination of content of minor elements
ISO 16994, Solid biofuels — Determination of total content of sulphur and chlorine
ISO 17225-1, Solid biofuels — Fuel specification and classes — Part 1: General requirements

1)
To be published.
ISO/DIS 17225-8:2015
2)
ISO 17828, Solid biofuels — Determination of bulk density
ISO 17829, Solid biofuels — Determination of length and diameter of pellets
ISO 17831-1, Solid biofuels — Determination of mechanical durability of pellets and briquettes — Part 1:
3)
Pellets
ISO 18122, Solid biofuels — Determination of ash content
ISO 18123, Solid biofuels — Determination of the content of volatile matter
4)
ISO 18125, Solid biofuels — Determination of calorific value
ISO 18134-1, Solid biofuels — Determination of moisture content — Oven dry method — Part 1: Total
5)
moisture — Reference method
ISO 18134-2, Solid biofuels — Determination of moisture content — Oven dry method — Part 2: Total
6)
moisture — Simplified procedure
7)
ISO 18135, Solid biofuels — Sampling
8)
ISO 18846, Solid biofuels — Determination of fines content in quantities of pellets
9)
ISO 18847, Solid biofuels – Determination of particle density of pellets and briquettes
3 Terms and definitions
3.1
thermally treatead biomass
biomass whose properties have been changed through heat treatment (usually by temperatures of 200
°C to 300 °C and above)
EXAMPLE torrefied biomass, charcoal
Note 1 to entry: Drying is not considered thermal treatment in this definition.
Note 2 to entry: In this Part of ISO 17225 standard charcoal is not included.
3.2
pellets made from thermally treated biomass
densified biofuel made from thermally treated solid biomass with or without additives usually with a
cylindrical form, random length typically 5 to 40 mm, diameter up to 25 mm and broken ends

3.3
briquettes made from thermally treated biomass
densified biofuel made with or without additives in form of cubiform, polyhedral, polyhydric or
cylindrical units with diameter of more than 25 mm produced by compressing thermally treated solid
biomass
2)
To be published.
3)
To be published.
4)
To be published.
5)
To be published.
6)
To be published.
7)
To be published.
8)
To be published.
9)
To be published
2 © ISO 2015 – All rights reserved

ISO/DIS 17225-8:2015
3.4
additive
material which has been intentionally introduced into the fuel feedstock to improve quality of fuel (e.g.
combustion properties), to reduce emissions or to make production more efficient

Note 1 to entry: Trace amounts of e.g. grease or other lubricants that are introduced into the fuel processing
stream as part of normal mill operations are not considered as additives.

3.5
chemical treatment
any treatment with chemi
...