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EN ISO 19870-1:2026

Hydrogen technologies - Methodology for determining the greenhouse gas emissions associated with the hydrogen supply chain - Part 1: Emissions associated with the production of hydrogen up to the production gate (ISO 19870-1:2026)

Edition date: 2026-04-22
In Force
Available languages: English, French
Summary: There are numerous pathways to produce hydrogen. This document specifies a methodology for different hydrogen production pathways for determining the greenhouse gases (GHG) emissions associated with the hydrogen supply chain from the raw material extraction up to the production gate. This document considers the GHG emissions associated with hydrogen production up to the production gate. This document applies to and includes every step within the production process up to the production gate (see Figure 2 in the Introduction). NOTE            Complementary documents in the ISO 19870 series will consider hydrogen conditioning, conversion and transport methods. ISO 14044 requires the goal and scope of a life cycle assessment (LCA) be clearly defined and be consistent with the intended application. Due to the iterative nature of LCAs, it is possible that the LCA scope needs to be refined during the study. According to ISO 14040:2006, A.2, the goals and scope of LCAs correspond to one of the following two approaches: an approach that assigns elementary flows and potential environmental impacts to a specific product system, typically as an account of the history of the product (see 4.1.2); an approach that studies the environmental consequences of possible (future) changes between alternative product systems (see 4.1.3). In this document, approach a) is referred to as an attributional approach, while approach b) is referred to as a consequential approach. Complementary information is accessible in the ILCD handbook[4]. A carbon footprint of a product (CFP) (3.1.2) or partial CFP (3.1.3) as defined by ISO 14067 can be estimated using either the attributional or the consequential approach, the latter corresponding to the use of “system expansion via substitution” to avoid allocation when a unit process yields multiple co-products. This document applies to the CFP for hydrogen production.

Il existe de nombreuses voies pour produire de l'hydrogène. Le présent document spécifie une méthodologie pour différentes voies de production d'hydrogène afin de déterminer les émissions de gaz à effet de serre (GES) associées à la chaîne d'approvisionnement en hydrogène depuis l'extraction des matières premières jusqu'au point de production. Le présent document prend en compte les émissions de GES associées à la production d'hydrogène jusqu'au point de production. Le présent document s'applique et comprend toutes les étapes du processus de production jusqu'au point de production (voir Figure 2 dans l'Introduction). NOTE            Les documents complémentaires de la série ISO 19870 considéreront les méthodes de conditionnement, de conversion et de transport de l'hydrogène. L'ISO 14044 exige que le but et le domaine d'application d'une analyse du cycle de vie (ACV) soient clairement définis et soient cohérents avec l'application prévue. En raison de la nature itérative des ACV, il est possible que le domaine d'application des ACV ait besoin d'être affiné pendant l'étude. Selon l'ISO 14040:2006, A.2, les objectifs et le domaine d'application des ACV correspondent à l'une des deux approches suivantes: une approche qui attribue des flux élémentaires et des potentiels impacts environnementaux à un système de produits spécifique, généralement en tant que compte-rendu de l'historique du produit. (voir 4.1.2); une approche qui étudie les conséquences environnementales d'éventuels (futurs) changements entre systèmes de produits alternatifs (voir 4.1.3). Dans le présent document, l'approche a) est appelée approche attributionnelle, tandis que l'approche b) est appelée approche conséquentielle. Des informations complémentaires sont accessibles dans le manuel ILCD[4]. L'empreinte carbone d'un produit (ECP) (3.1.2) ou l'empreinte ECP partielle (3.1.3) telle que définie par l'ISO 14067 peut être estimée à l'aide de l'approche attributionnelle ou de l'approche conséquentielle, cette dernière correspondant à l'utilisation de l'«élargissement du système par substitution» pour éviter l'allocation lorsqu'un processus élémentaire produit plusieurs coproduits. Le présent document s'applique à l'ECP pour la production d'hydrogène.

ICS: 13.020.40-Pollution, pollution control and conservation, 27.075-Hydrogen technologies
CTN: CEN/CLC/JTC 6 - 2121095

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