CEN/TR 17238:2018
(Main)Proposed limit values for contaminants in biomethane based on health assessment criteria
Proposed limit values for contaminants in biomethane based on health assessment criteria
This document explains an approach for assessment of limit values for contaminants that may be found in biomethane. Limit values are generally required as an adjunct to a biomethane specification (such as parts 1 and 2 of EN 16723, or an equivalent National specification) or as part of a Network Entry Agreement for injection of biomethane into gas networks.
The methodology employed will permit derivation of limit values based solely on consideration of potential for impact on human health and does not consider other impacts, such as integrity and operation of plant and pipelines used to convey biomethane or appliances involved in its combustion or other regulations like CLP regulation. Where consideration of such impacts would result in proposing lower limit values than those based on health impacts, then the lowest limit values should generally be proposed.
Vorgeschlagene Grenzwerte für Verunreinigungen in Biomethan auf Grundlage von Gesundheitsgefährdungskriterien
Valeurs limites proposées pour les contaminants dans le biométhane selon des critères d'évaluation relatifs à la santé
Le présent Rapport technique décrit une approche pour l'évaluation de valeurs limites pour les contaminants que l'on peut trouver dans le biométhane. Des valeurs limites sont généralement requises en complément d'une spécification de biométhane (comme les Parties 1 et 2 de l'EN 16723 ou spécification nationale équivalente) ou dans le cadre d'un accord d'entrée de réseau pour l'injection de biométhane dans les réseaux de gaz.
La méthodologie employée permettra d'établir des valeurs limites uniquement sur la base de l'examen de l'incidence potentielle sur la santé humaine, sans tenir compte des répercussions possibles sur les autres éléments, tels que l'intégrité et le fonctionnement des installations et canalisations servant à transporter le biométhane ou des appareils impliqués dans sa combustion, ni des autres règlements comme le règlement CLP. Si l'examen de ces répercussions conduit à proposer des valeurs limites inférieures à celles fondées sur l'incidence sur la santé, il convient en règle générale de proposer les valeurs limites les plus basses.
Predlagane mejne vrednosti za onesnaževala v biometanu na podlagi meril zdravstvene presoje
Ta dokument pojasnjuje pristop k ocenjevanju mejnih vrednosti za onesnaževala, ki jih je mogoče odkriti v biometanu. Mejne vrednosti so običajno zahtevane kot dodatek k specifikaciji biometana (npr. dela 1 in 2 standarda EN 16723 ali enakovredna nacionalna specifikacija) ali kot del pogodbe NEA (Network Entry Agreement) za vbrizgavanje biometana v plinska omrežja.
Uporabljena metodologija bo omogočala izpeljavo mejnih vrednosti izključno na podlagi upoštevanja morebitnega vpliva na človeško zdravje in ne upošteva drugih vplivov, kot sta celovitost ter delovanje obrata in cevovodov, ki se uporabljajo za prenos biometana, oziroma naprav, vključenih v njegovo zgorevanje, ali drugih uredb (npr. uredba CLP). Če bi upoštevanje takih vplivov pomenilo predlaganje nižjih mejnih vrednosti od tistih, ki temeljijo na vplivih na zdravje, je treba na splošno predlagati najnižje mejne vrednosti.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2018
Predlagane mejne vrednosti za onesnaževala v biometanu na podlagi meril
zdravstvene presoje
Proposed limit values for contaminants in biomethane based on health assessment
criteria
Vorgeschlagene Grenzwerte für Verunreinigungen in Biomethan auf Grundlage von
Gesundheitsgefährdungskriterien
Valeurs limites proposées pour les contaminants dans le biométhane sur la base de
critères d'évaluation de la santé
Ta slovenski standard je istoveten z: CEN/TR 17238:2018
ICS:
27.190 Biološki viri in drugi Biological sources and
alternativni viri energije alternative sources of energy
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEN/TR 17238
TECHNICAL REPORT
RAPPORT TECHNIQUE
April 2018
TECHNISCHER BERICHT
ICS 75.160.30; 27.190
English Version
Proposed limit values for contaminants in biomethane
based on health assessment criteria
Valeurs limites proposées pour les contaminants dans Vorgeschlagene Grenzwerte für Verunreinigungen in
le biométhane sur la base de critères d'évaluation de la Biomethan auf Grundlage von
santé Gesundheitsgefährdungskriterien
This Technical Report was approved by CEN on 9 April 2018. It has been drawn up by the Technical Committee CEN/TC 408.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17238:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols, units and abbreviated terms . 8
4.1 Cg: maximum acceptable concentration in biomethane (mg/m ) . 8
4.2 Cexp: exposure concentration . 8
4.3 M: multiplier in the exposure model . 8
4.4 CAS number: Unique numerical identifier assigned by Chemical Abstracts Service . 8
5 Global Approach for assessment of limit values . 8
5.1 General . 8
5.2 Definition of the database for gas composition and HCVs . 9
5.3 Definition of the exposure model . 10
5.4 Part III: Determination of COPCs . 10
6 Assessment and selection of Health Criteria Values: general guidance on assessment
and selection of HCVs . 10
7 Application of the methodology: Biomethane injection into gas networks . 11
Annex A (Informative) Example of different sources of HCVs . 12
Annex B (Informative) Example of the application of the methodology . 13
B.1 General . 13
B.2 Conceptual Model . 13
B.3 Chemicals of Potential Concern (COPCs) . 14
B.4 Mathematical Exposure Model . 14
B.4.1 General . 14
B.4.2 Modelling exposure concentrations – domestic cooking situation. 15
B.5 Selection of HCVs . 18
B.6 Determination of the maximum tolerable concentration of each contaminant . 19
Annex C (Informative) Details of the exposure model . 21
C.1 Introduction . 21
C.2 Nomenclature . 21
C.3 Continuous releases . 22
C.4 Decay in concentration following cessation of release . 22
C.5 Average concentrations . 23
C.6 Use of multipliers . 26
C.7 Exposure model spreadsheet . 26
Bibliography . 27
European foreword
This document (CEN/TR 17238:2018) has been prepared by Technical Committee CEN/TC 408
“Natural gas and biomethane for use in transport and biomethane for injection in the natural gas grid”,
the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
Introduction
This standard was prepared by CEN/TC 408 in response to the European Commission standardization
mandate M/475.
The Mandate asks for the development of a set of quality specifications for biomethane to be used as a
fuel for vehicle engines and to be injected in natural gas pipelines (network).
However, the scope of the standard was widened according to BT decision C109/2012 that redefined
the scope of CEN/TC 408: “Standardization of specifications for natural gas and biomethane as vehicle
fuel and of biomethane for injection in the natural gas grid, including any necessary related methods of
analysis and testing. Production process, source and the origin of the source are excluded”.
One of the aims of European policy in the field of energy is to increase the security of energy supply in
the EU as well as to contribute to reduce the emission of greenhouse gases accepted by the EU at Kyoto.
In this context a special focus is given to the development and use of energy from renewable sources.
Directive 2009/28/EC on the promotion of the use of energy from renewable sources and amending
and subsequently repealing Directives 2001/77/EC and 2003/30/EC stipulates clear aims regarding
the percentage of renewables in EU energy consumption and states the related need to support the
integration of energy from renewable sources into the energy networks including the establishment of
appropriate technical rules in line with Directive 2003/55/EC (Article 6) replaced by 2009/73/EC
(Article 8) for the realization of the competitive single European Gas Market and the technical
interoperability of gas networks, (network connection, gas quality, gas odorization and gas pressure
requirements).
Supporting the EU policy and therefore the maximization of the production and use of biomethane and
considering the absence of standards the European Commission DG ENER has included the injection of
biomethane in natural gas pipelines in Mandate M/475. Biomethane in this context can be produced
from biological (fermentation, digestion …) and thermochemical processes and it is essential that it is
appropriate to be used as a blending component to natural gas.
1 Scope
This document explains an approach for assessment of limit values for contaminants that may be found
in biomethane. Limit values are generally required as an adjunct to a biomethane specification (such as
parts 1 and 2 of EN 16723, or an equivalent National specification) or as part of a Network Entry
Agreement for injection of biomethane into gas networks.
The methodology employed will permit derivation of limit values based solely on consideration of
potential for impact on human health and does not consider other impacts, such as integrity and
operation of plant and pipelines used to convey biomethane or appliances involved in its combustion or
other regulations like CLP regulation. Where consideration of such impacts would result in proposing
lower limit values than those based on health impacts, then the lowest limit values should generally be
proposed.
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.
EN 16723-1:2016, Natural gas and biomethane for use in transport and biomethane for injection in the
natural gas network — Part 1: Specifications for biomethane for injection in the natural gas network
EN 16723-2:2017, Natural gas and biomethane for use in transport and biomethane for injection in the
natural gas network — Part 2: Automotive fuels specification
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
biogas
gas, comprising principally methane and carbon dioxide, obtained from the anaerobic digestion of
biomass
3.2
biomass
biological material from living, or recently living organisms, typically this may be plants or plant-
derived materials
3.3
biomethane
gas comprising principally methane, obtained from either upgrading of biogas or methanation of bio-
syngas
3.4
bio-syngas
gas, comprising principally carbon monoxide and hydrogen, obtained from gasification of biomass
3.5
contaminant
chemical with undesired properties which may be present in biomethane at a low concentration and for
which no maximum concentration is specified in EN 16723
3.6
Chemicals Of Potential Concern
(COPC)
chemicals that may present a risk to the environment directly or after combustion
3.7
Health Criteria Value
(HCV)
generic term to describe a benchmark level of exposure to a chemical derived from available toxicity
data for the purposes of safeguarding human health. They are defined for instance by US EPA (US),
ANSES (FR), Environment Agency (UK), RIVM (NL), ARPA (IT). The unit is mg/m
3.8
limit value
maximum concentration of a contaminant that is allowed in a gas quality specification
3.9
natural gas
complex gaseous mixture of hydrocarbons, primarily methane, but generally includes ethane, propane
and higher hydrocarbons, and some non-combustible gases such as nitrogen and carbon dioxide
Note 1 to entry: Natural gas can also contain components or contaminants such as sulphur compounds and/or
other chemical species.
3.10
natural gas network
transmission network or local distribution system
3.11
non-threshold effect chemical
chemical that may theoretically pose a risk at any level of exposure
3.12
(Health) Risk
possibility that a harmful event (death, injury or loss) arising fr
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.