DIN ISO 22197-1-2016 Fine ceramics (advanced ceramics advanced technical ceramics) - Test method for air-purification performance of semiconducting photocatalytic materials - Part .pdf

1、April 2016 English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 81.060.30!%Q“2469704www.din.deDIN

2、ISO 22197-1Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for air-purification performance of semiconducting photocatalytic materials Part 1: Removal of nitric oxide (ISO 22197-1:2007),English translation of DIN ISO 22197-1:2016-04Hochleistungskeramik Prfverfahren zur Bes

3、timmung des Luftreinigungsvermgens von halbleitenden photokatalytischen Werkstoffen Teil 1: Entfernung von Stickstoffmonoxid (ISO 22197-1:2007),Englische bersetzung von DIN ISO 22197-1:2016-04Cramiques techniques Mthodes dessai relatives la performance des matriaux photocatalytiques semi-conducteurs

4、 pour la purification de lair Partie 1: limination de loxyde nitrique (ISO 22197-1:2007),Traduction anglaise de DIN ISO 22197-1:2016-04www.beuth.deDocument comprises 16 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.04.16 A co

5、mma is used as the decimal marker. Contents PageNational foreword. 3 1 Scope . 5 2 Normative references . 5 3 Terms and definitions. 6 4 Symbols . 7 5 Principle. 7 6 Apparatus 7 7 Test piece 10 8 Procedure 10 9 Calculation. 12 10 Test report . 14 Annex A (informative) Results of round-robin test. 15

6、 Bibliography . 16 DIN ISO 22197-1:2016-042National Annex NA (informative) Bibliography 4 National foreword This document (ISO 22197-1:2007) has been prepared by Technical Committee ISO/TC 206 Fine ceramics“ (Secretariat: JISC, Japan). The responsible German body involved in its preparation was DIN-

7、Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-02-93 AA Photokatalyse. Attention is drawn to the possibility that some elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any

8、 or all such patent rights. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 31-0 DIN EN ISO 80000-1 ISO 4892-1*)DIN EN ISO 4892-1*)ISO 4892-3 DIN EN ISO 4892-3 ISO 5725-2 DIN ISO 5725-2 ISO 6145-7 DIN EN ISO 6145-7 ISO 7996 DIN ISO 7996

9、)ISO 10304-1 DIN EN ISO 10304-1 ISO 10523 DIN EN ISO 10523 ISO/IEC 17025*)DIN EN ISO/IEC 17025*)ISO 22197 consists of the following parts, under the general title Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for air-purification performance of semiconducting photocatal

10、ytic materials: null Part 1: Removal of nitric oxide null Part 2: Removal of acetaldehyde null Part 3: Removal of toluene null Part 4: Removal of formaldehyde null Part 5: Removal of methyl mercaptan Notes relating to the German version of this standard: Supplementary to 3.6, Working Committee NA 06

11、2-02-93 AA recommends the use of water with a specific conductivity lower than 1 S/cm. *)Under revision. *)Withdrawn. DIN ISO 22197-1:2016-043 National Annex NA (informative) Bibliography DIN EN ISO 80000-1, Quantities and units Part 1: General DIN EN ISO 4892-1, Plastics Methods of exposure to labo

12、ratory light sources Part 1: General guidance DIN EN ISO 4892-3, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps DIN EN ISO 6145-7, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 7: Thermal mass-flow controllers DIN EN

13、 ISO 10304-1, Water quality Determination of dissolved anions by liquid chromatography of ions Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate DIN EN ISO 10523, Water quality Determination of pH DIN EN ISO/IEC 17025, General requirements for the competen

14、ce of testing and calibration laboratories DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method DIN ISO 7996, Ambient air Determination of the mass concent

15、ration of nitrogen oxides Chemiluminescence method DIN ISO 22197-1:2016-044 Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for air-purification performance of semiconducting photocatalytic materials Part 1: Removal of nitric oxide 1 Scope This part of ISO 22197 specifies

16、a test method for the determination of the air-purification performance of materials that contain a photocatalyst or have photocatalytic films on the surface, usually made from semiconducting metal oxides, such as titanium dioxide or other ceramic materials, by continuous exposure of a test piece to

17、 the model air pollutant under illumination with ultraviolet light. This part of ISO 22197 is intended for use with different kinds of materials, such as construction materials in flat sheet, board or plate shape, that are the basic forms of materials for various applications. This part of ISO 22197

18、 also applies to materials in honeycomb-form, and to plastic or paper materials if they contain ceramic microcrystals and composites. This part of ISO 22197 does not apply to powder or granular photocatalytic materials. This test method is usually applicable to photocatalytic materials produced for

19、air purification. This method is not suitable for the determination of other performance attributes of photocatalytic materials, i.e., decomposition of water contaminants, self-cleaning, antifogging and antibacterial actions. It concerns the removal of nitric oxide. 2 Normative references The follow

20、ing referenced documents are indispensable for the application 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. ISO 31-0:1992, Quantities and units Part 0: General princip

21、les ISO 4677-1:1985, Atmospheres for conditioning and testing Determination of relative humidity Part 1: Aspirated psychrometer method ISO 4892-1:1), Plastics Methods of exposure to laboratory light sources Part 1: General guidance ISO 4892-3:2006, Plastics Methods of exposure to laboratory light so

22、urces Part 3: Fluorescent UV lamps ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method ISO 6145-7:2001, Gas analysis Preparation of calibration gas mixtu

23、res using dynamic volumetric methods Part 7: Thermal mass-flow controllers 1) To be published. (Revision of ISO 4892-1:1999.) DIN ISO 22197-1:2016-045 ISO 7996:1985, Ambient air Determination of the mass concentration of nitrogen oxides Chemiluminescence method ISO 10304-1:2), Water quality Determin

24、ation of dissolved anions by liquid chromatography of ions Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate ISO 10523:1994, Water quality Determination of pH ISO/IEC 17025:2005, General requirements for the competence of testing and calibration laboratori

25、es 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 photocatalyst substance that performs one or more functions based on oxidation and reduction reactions under photoirradiation, including decomposition and removal of air and water contaminant

26、s, deodorization, and antibacterial, self-cleaning and antifogging actions 3.2 photocatalytic materials materials in which or on which the photocatalyst is added by coating, impregnation, mixing, etc. NOTE Such photocatalytic materials are intended primarily for use as building and road construction

27、 materials to obtain the above-mentioned functions. 3.3 zero-calibration gas air that does not contain pollutants (i.e. in which common pollutants are below 0,01 l/l) NOTE The zero-calibration gas is prepared from indoor air using a laboratory air-purification system, or supplied as synthetic air in

28、 a gas cylinder. 3.4 standard gas diluted gases of known concentrations supplied in cylinders and certified by an accredited laboratory 3.5 test gas mixture of air and pollutant(s) of known concentration prepared from a standard gas or a zero-calibration gas, to be used for the performance test of a

29、 photocatalytic material 3.6 purified water water to be used for elution, etc., with a conductivity lower than 1 S, prepared by the ion exchange method or distillation 2) To be published. (Revision of ISO 10304-1:1992.) DIN ISO 22197-1:2016-046 4 Symbols f air-flow rate converted into that at the st

30、andard state (0 C, 101,3 kPa, and dry gas basis) (l/min) NOnitric oxide volume fraction at the reactor exit (l/l) NOisupply volume fraction of nitric oxide (l/l) NO2nitrogen dioxide volume fraction at the reactor exit (l/l) NOxthe volume fraction of nitrogen oxides (NO+ NO2) at the reactor exit (l/l

31、) NO2-nitrite ion concentration in the eluent from the test piece (mg/l) NO3-nitrate ion concentration in the eluent from the test piece (mg/l) t time of adsorption, removal or desorption operation (min) nadsthe amount of NOxadsorbed by the test piece (mol) ndesthe amount of NOxdesorbed from the tes

32、t piece (mol) nNOthe amount of NO removed by the test piece (mol) nNO2the amount of NO2formed by the test piece (mol) nNOxthe amount of NOxremoved by the test piece (mol) nwthe amount of nitrogen eluted from the test piece (mol) w1, w2are the 1st and 2nd elutions, respectively Vwthe volume of collec

33、ted washings (ml) w1, w2are the 1st and 2nd elutions, respectively wthe fractional recovery of nitrogen 5 Principle This part of ISO 22197 concerns the development, comparison, quality assurance, characterization, reliability, and design data generation of photocatalytic materials1. The method descr

34、ibed is intended to obtain the air-purification performance of photocatalytic materials by exposing a test piece to model polluted air under illumination by ultraviolet (UV) light2. Nitric oxide (NO) is chosen as a typical air pollutant that gives nonvolatile products on the photocatalyst. The test

35、piece, placed in a flow-type photoreactor, is activated by UV illumination, and adsorbs and oxidizes gas-phase NO to form nitric acid (or nitrate) on its surface3. A part of the NO is converted to nitrogen dioxide (NO2) on the test piece. The air-purification performance is determined from the amoun

36、t of the net removal of nitrogen oxides (NOx) (= NO removed NO2formed). The simple adsorption and desorption of NO by the test piece (not due to photocatalysis) is evaluated by tests in the dark. Although the photocatalytic activity is reduced by the accumulation of reaction products, it is usually

37、restored by washing with water4. The elution test provided here gives information about the ease of regeneration and material balance of the pollutants. 6 Apparatus 6.1 Test equipment The test equipment enables a photocatalytic material to be examined for its pollutant-removal capability by supplyin

38、g the test gas continuously, while providing photoirradiation to activate the photocatalyst. It consists of DIN ISO 22197-1:2016-047 a test gas supply, a photoreactor, a light source, and pollutant measurement equipment. Since low concentrations of pollutants are to be tested, the system shall be co

39、nstructed with materials of low adsorption and resistant to ultraviolet (UV) radiation, for example, acrylic resin, stainless steel, glass and fluorocarbon polymers. An example of a test system is shown in Figure 1. 6.2 Test gas supply The test gas supply provides air polluted with the model contami

40、nant at a predetermined concentration, temperature and humidity, and supplies it continuously to the photoreactor. It consists of flow regulators, a humidifier, gas mixers, etc. The flow rate of each gas should be within 5 % of the designated value, which is easily attained by using thermal mass-flo

41、w controllers, with a knowledge of calibrated gas flow rate and temperature in accordance with ISO 6145-7. Typical capacities of the flow controller for pollutant gas, dry air and wet air are 0,1 l/min, 2,0 l/min and 2,0 l/min, respectively. The expression of gas flow rate in this part of ISO 22197

42、is that converted to the standard state (0 C, 101,3 kPa, and dry gas basis). The standard NO gas, normally balanced with nitrogen in a cylinder, shall have a volume fraction of 30 to 100 l/l, because the oxidation of NO to NO2upon mixing with purified air becomes prominent with a higher concentratio

43、n of NO. Dimensions in millimetres Key 1 light source 7 mass-flow controllers 2 optical window 8 gas mixers 3 test piece 9 humidifier 4 standard gas (pollutant) 10 analyser 5 air-purification system 11 vent 6 air compressor Figure 1 A schematic of the test equipment DIN ISO 22197-1:2016-048 Dimensio

44、ns in millimetres a) For flat test pieces b) For honeycomb filters Key 1 optical window 2 test piece 3 test gas flow 4 height-adjusting plate 5 air layer thickness 6 test piece (honeycomb) Figure 2 Cross-sectional view of photoreactor 6.3 Photoreactor The photoreactor holds a planar test piece withi

45、n a 50 mm wide trough, with its surface parallel to an optical window for photoirradiation. The reactor shall be fabricated from materials that adsorb minimal test gas and withstand irradiation of near-UV light. The test piece shall be separated from the window by a 5,0 mm 0,5 mm thick air layer. Th

46、e test gas shall pass only through the space between the test piece and the window. This gap shall be accurately set up, for example by using height-adjusting plates with different thicknesses, as shown in Figure 2 a). When a filter-type photocatalyst is tested, an alternative type of test-piece hol

47、der shall be used, which holds the test piece while allowing the test gas to pass through the cells of the filter under illumination (Figure 2 b). Quartz or borosilicate glass that absorbs minimal light at wavelengths longer than 300 nm shall be used for the window. 6.4 Light source The light source shall provide UV-A illumination within a wavelength range of 300 nm to 400 nm. Suitable sources include the so-called black light (BL) and black light blue (BLB) fluorescent lamps, with a maximum at 351 nm,