EN 16980-1:2021

SLOVENSKI STANDARD
01-november-2021
Nadomešča:
SIST-TS CEN/TS 16980-1:2017
Fotokataliza - Metode preskušanja kontinuiranega pretoka - 1. del: Ugotavljanje
razgradnje dušikovega oksida (NO) v zraku z materiali fotokatalize
Photocatalysis - Continuous flow test methods - Part 1: Determination of the degradation
of nitric oxide (NO) in the air by photocatalytic materials
Photokatalyse - Prüfverfahren mit kontinuierlichem Durchfluss - Teil 1: Bestimmung des
Abbaus von Stickstoffmonoxid (NO) aus der Luft durch photokatalytische Werkstoffe
Photocatalyse - Méthodes d'essai en flux continu - Partie 1 : Mesure de la dégradation
du monoxyde d'azote (NO) dans l'air par un matériau photocatalytique
Ta slovenski standard je istoveten z: EN 16980-1:2021
ICS:
13.040.20 Kakovost okoljskega zraka Ambient atmospheres
25.220.20 Površinska obdelava Surface treatment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16980-1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2021
EUROPÄISCHE NORM
ICS 13.040.20; 87.040; 87.060.20; 91.100.10 Supersedes CEN/TS 16980-1:2016
English Version
Photocatalysis - Continuous flow test methods - Part 1:
Determination of the degradation of nitric oxide (NO) in
the air by photocatalytic materials
Photocatylyse - Méthode d'essai en flux continu - Photokatalyse - Prüfverfahren mit kontinuierlichem
Partie 1 : Détermination de la dégradation du Durchfluss - Teil 1: Bestimmung des Abbaus von
monoxyde d'azote (NO) dans l'air par des matériaux Stickstoffmonoxid (NO) aus der Luft durch
photocatalytiques photokatalytische Werkstoffe
This European Standard was approved by CEN on 9 May 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16980-1:2021 E
worldwide for CEN national Members.

Contents  Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and abbreviations . 5
3.1 Terms and definitions . 5
3.2 Abbreviations and symbols . 6
4 Principle . 8
5 Interferences . 8
6 Apparatus . 8
6.1 General . 8
6.2 Gas mixture preparation system . 8
6.3 Illumination and measuring system . 9
7 Sample preparation . 14
7.1 Precaution. 14
7.2 Sample characteristics . 15
7.3 Conditioning . 15
8 Measurement of concentrations . 15
8.1 General . 15
8.2 Measurement of the initial concentration of nitrogen oxides before entering the
photochemical reactor . 16
8.3 Conversion without sample . 16
8.4 Conversion in the dark and in the presence of sample . 17
8.5 Conversion under illumination in the presence of sample . 17
9 Calculation of photocatalytic degradation rate . 18
9.1 The observed rate of photocatalytic degradation . 18
9.2 Intrinsic rate of photocatalytic transformation . 19
10 Optional part for the use of different fan speeds . 19
10.1 General . 19
10.2 Conversion under illumination in the presence of sample at different fan speeds . 19
10.3 Calculation of photocatalytic degradation rate at different fan speeds . 20
11 Acceptability ranges of main test parameters . 21
12 Test report . 22
Annex A (informative) Typical trend of NO, NO and NO concentrations during a
2 x
photocatalytic test at nominal fan speed . 24
Annex B (informative) Typical trend of NO, NO and NO concentrations during a
2 x
photocatalytic test using different fan speeds . 25
Annex C (informative) Example of test for the control of mass transfer limitation . 26
Annex D (informative) Typical Ohmic response of the fan . 27
Bibliography . 28

European foreword
This document (EN 16980-1:2021) has been prepared by Technical Committee CEN/TC 386
“Photocatalysis”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2022, and conflicting national standards shall be
withdrawn at the latest by March 2022.
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 supersedes CEN/TS 16980-1:2016.
CEN/TS 16980-1:2016:
— 3.2
— addition of: “A sample illuminated surface area in m ”
— deletion of: “CIN concentration at reactor inlet” and “Fv,I fan flow at ith potential”
— modification of abbreviations: “F Flow” to “Q Flow”, “V0” to “U ”, “Vmin” to “U ”, “MM” to “M”
0 min
— 6.3 (before 6.2) Modification of Figure 2
— 7.1 updated sentence: “Samples shall be eventually preconditioned following the supplier advices.”
C ppmv ××M P
( )
−33
— 8.1 updated formula: C µ g m 10 ppmv× k
( )
R× T
— 12 (before 11):
— addition of: “a) international Standard used (including its year of publication)”;
“b) any deviations from the procedure”;
“c) the date of the test”;
— Annex A: change of figure “Typical trend of NO, NO and NO concentrations during a photocatalytic
2 x
test at nominal fan speed”
— Annex B: change of figure “Typical trend of NO, NO and NO concentrations during a photocatalytic
2 x
test at nominal fan speed”.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
= =
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
1 Scope
This document specifies a method for assessing the performance of photocatalytic inorganic materials
contained in cement mortars and/or limes or ceramic-based matrices, paints or materials deposited as
thin films or coatings on a variety of substrates for the photocatalytic abatement of nitric oxide in the gas
phase. This method does not apply to the assessment of samples to be applied with flow perpendicular
to the surface or flow permeating the surface itself as polymeric and paper filters, honeycomb structures
and suchlike.
The performance for the photocatalytic sample under test is evaluated by measuring the degradation rate
of nitric oxide (NO) using the method specified herein. The photocatalytic abatement rate is calculated
from the observed rate by eliminating the effects of mass transfer. The intrinsic photocatalytic abatement
rate is an intrinsic property of the material tested and makes it possible to distinguish the photocatalytic
activities of various products with an absolute scale defined with physical and engineering meaning.
For the measurements and calculations described in this document the concentration of nitrogen oxides
(NO ) is defined as the stoichiometric sum of nitric oxide (NO) and nitrogen dioxide (NO ).
x 2
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.
CEN/TS 16599, Photocatalysis — Irradiation conditions for testing photocatalytic properties of
semiconducting materials and the measurement of these conditions
EN ISO 9169, Air quality — Definition and determination of performance characteristics of an automatic
measuring system (ISO 9169)
ISO 7996:1985, Ambient air — Determination of the mass concentration of nitrogen oxides —
Chemiluminescence method
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms, definitions and abbreviations apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1.1
concentration of nitrogen oxides
NO
x
stoichiometric sum of nitric oxide (NO) and nitrogen dioxide (NO )
Note 1 to entry: For grade 999 nitrogen or air, the purity of the gas should be equal at least to 99,9 %.
3.1.2
photocatalyst
catalyst able to produce, upon absorption of light, chemical transformations of the reaction partners
Note 1 to entry: The excited state of the photocatalyst repeatedly interacts with the reaction partners forming
reaction intermediates and regenerates itself after each cycle of such interactions.
3.1.3
photocatalytic material
material in which or on which the photocatalyst
...