ISO 14687-2:2012

INTERNATIONAL ISO
STANDARD 14687-2
First edition
2012-12-01
Hydrogen fuel — Product
specification —
Part 2:
Proton exchange membrane (PEM)
fuel cell applications for road vehicles
Carburant hydrogène — Spécification de produit —
Partie 2: Applications des piles à combustible à membrane à échange
de protons (MEP) pour les véhicules routiers
Reference number
©
ISO 2012
ISO 14687-2:2012(E)
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Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 14687-2:2012(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Requirements . 2
4.1 Classification . 2
4.2 Applications . 2
4.3 Limiting characteristics . 3
5  Hydrogen fuel qualification test . 3
5.1 General requirements . 3
5.2 Report results . 4
6  Sampling . 4
6.1 Sample size . 4
6.2 Gaseous hydrogen . 4
6.3 Particulates in gaseous hydrogen . 4
6.4 Liquid hydrogen . 4
7  Analytical methods. 4
7.1 General . 4
7.2 Parameters of analysis. 5
7.3 Water content . 5
7.4 Total hydrocarbon content . 5
7.5 Oxygen content . 5
7.6 Helium content. 6
7.7 Argon and nitrogen contents . 6
7.8 Carbon dioxide content. 6
7.9 Carbon monoxide content . 6
7.10 Total sulfur content . 6
7.11 Formaldehyde content . 6
7.12 Formic acid content . 7
7.13 Ammonia content . 7
7.14 Total halogenated compounds content . 7
7.15 Particulates concentration . 7
8  Detection limit and determination limit . 7
9  Quality assurance . 8
9.1 On-site fuel supply . 8
9.2 Off-site fuel supply . 8
10  Safety . 8
Annex A (informative) Rationale for the selection of hydrogen contaminants .9
Annex B (informative) Suggested analytical and sampling methods with detection and
determination limits .11
Annex C (informative) One common practice of quality assurance for hydrogen production
processes that utilize reforming processes associated with pressure swing adsorption
(PSA) purification .13
Bibliography .15
ISO 14687-2:2012(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 14687-2 was prepared by Technical Committee ISO/TC 197, Hydrogen technologies.
This first edition of ISO 14687-2 cancels and replaces the first edition of ISO/TS 14687-2:2008.
ISO 14687 consists of the following parts, under the general title Hydrogen fuel — Product specification:
— Part 1: All applications except proton exchange membrane (PEM) fuel cell for road vehicles
— Part 2: Proton exchange membrane (PEM) fuel cell applications for road vehicles
— Part 3: Proton exchange membrane (PEM) fuel cell applications for stationary appliances
iv © ISO 2012 – All rights reserved

ISO 14687-2:2012(E)
Introduction
This part of ISO 14687 specifies two grades of hydrogen fuel, “Type I, grade D” and ― Type II, grade D.
These grades are intended to apply to the interim stage of proton exchange membrane (PEM) fuel cells
for road vehicles (FCV) on a limited production scale.
It is also noted that this part of ISO 14687 has been prepared based on the research and development
focusing on the following items:
— PEM catalyst and fuel cell components tolerance to hydrogen fuel contaminants;
— effects/mechanisms of contaminants on fuel cell systems and components;
— contaminant measurement techniques for laboratory, production, and in-field operations;
— onboard hydrogen storage technology;
— vehicle demonstration results.
Since the FCV and related technology are developing rapidly, this part of ISO 14687 needs to be
revised according to technological progress as necessary. Technical Committee ISO/TC 197, Hydrogen
Technologies, will monitor this technology trend.
INTERNATIONAL STANDARD  ISO 14687-2:2012(E)
Hydrogen fuel — Product specification —
Part 2:
Proton exchange membrane (PEM) fuel cell applications
for road vehicles
1 Scope
This part of ISO 14687 specifies the quality characteristics of hydrogen fuel in order to ensure uniformity
of the hydrogen product as dispensed for utilization in proton exchange membrane (PEM) fuel cell road
vehicle systems.
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.
ISO 6145 (all parts), Gas analysis — Preparation of calibration gas mixtures using dynamic volumetric methods
ISO 14687-1, Hydrogen fuel — Product specification — Part 1: All applications except proton exchange
membrane (PEM) fuel cell for road vehicles
3  Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14687-1 and the following apply.
3.1
constituent
component (or compound) found within a hydrogen fuel mixture
3.2
contaminant
impurity that adversely affects the components within the fuel cell system or the hydrogen storage system
NOTE An adverse effect can be reversible or irreversible.
3.3
detection limit
lowest quantity of a substance that can be distinguished from the absence of that substance with a
stated confidence limit
3.4
determination limit
lowest quantity which can be measured at a given acceptable level of uncertainty
3.5
fuel cell system
power system used for the generation of electricity on a fuel cell vehicle, typically containing the following
subsystems: fuel cell stack, air processing, fuel processing, thermal management and water management
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