Standard No.:	GB/T 45462-2025
English Name:	Test methods for the performance of gas-phase air cleaning media and devices
Chinese Name:	气相空气净化材料及装置性能试验方法
Chinese Classification:	P48    Ventilation and air conditioning engineering
Professional Classification:	GB    National Standard
ICS Classification:	91.140.30 91.140.30    Ventilation and air-conditioning systems 91.140.30
Source Content Issued by:	SAMR; SAC
Issued on:	2025-03-28
Implemented on:	2025-10-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	26500 words
Translation Price(USD):	795.0
Delivery:	via email in 1~8 business day

GB/T 45462-2025 Test methods for the performance of gas-phase air cleaning media and devices English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS 91.140.30 CCS P 48 National Standard of the People's Republic of China GB/T 45462-2025 Test methods for the performance of gas⁃phase air cleaning media and devices 气相空气净化材料及装置性能试验方法 (English Translation) Issue date: 2025-03-28 Implementation date: 2025-10-01 Issued by the State Administration for Market Regulation the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols and abbreviations 5 Test methods for gas phase air purification materials 6 Test methods for gas phase air purification devices 7 Safety matters Annex A (Normative) Standard sampling procedures and test parameters for various purification materials Annex B (Normative) Target gas, occurrence mode and test method Annex C (Informative) Schematic diagram of decontaminated material test bench Annex D (Normative) Test bench performance, verification and maintenance requirements Annex E (Informative) Test report example Annex F (Informative) Test method for dimensionless clean air volume Annex G (Informative) Design of purification device test bench Bibliography Test methods for the performance of gas⁃phase air cleaning media and devices 1 Scope This document specifies the test methods of gas-phase air purification materials for conventional ventilation, test methods of gas-phase air purification devices, safety matters, etc. This document is applicable to gas-phase air purification particles, sheets and bulk purification materials for conventional ventilation, full-scale gas-phase air purification devices, and purification devices used in scrubbers, absorbers, non-adsorption equipment and other purification devices, and can be installed in various purification devices on the test bench specified in this document. 2 Normative references This document contains no normative references. 3 Terms and definitions The following terms and definitions apply to this document. 3.1 adsorption process by which the surface of an adsorbent absorbs molecules or ions in the surrounding medium (gas or vapor) through physical or chemical processes [Source: GB/T 16803-2018, 5.1.35] 3.2 adsorbent substances with greater adsorption capacity [Source: GB/T 16803-2018, 5.1.36] 3.3 bypass test gas stream that bypasses the purification device and has not come into contact with the purified material [Source: ISO 29464: 2024, 3.1.5] 3.4 challenge compound chemical used as a target contaminant in a test 3.5 capacity amount of target gas contained by the purification material or purification device under the given test conditions and at the specified test termination point Note 1: The contamination capacity during desorption is negative. Note 2: The unit is milligram (mg) or mol (mol). 3.6 challenge volume fraction volume fraction of target gas in the pre-purge gas stream (test gas stream) 3.7 air stream gas stream that dilutes the purification material under test and the target gas upstream of the device to a specified volume fraction [Source: ISO 29464: 2024, 3.5.14] 3.8 chemisorption adsorption of gaseous or vapor contaminants is captured on the surface of the adsorbent in a manner that includes chemical reactions [Source: ISO 29464: 2024, 3.5.19] 4 Symbols and abbreviations 4.1 Symbols The following symbols apply to this document. Bim: mass transfer Bitwort number, Bim = hmr0/D, dimensionless; CD: downstream contaminant volume fraction in microliters per cubic meter or milliliters per cubic meter (μL/m3 or mL/m3); CU: upstream contaminant volume fraction in microliters per cubic meter or milliliters per cubic meter (μL/m3 or mL/m3); CkD: When measuring the volume fraction of upstream pollutants, the volume fraction of downstream pollutants obtained by linear interpolation, in microliters per cubic meter or milliliters per cubic meter (μL/m3 or mL/m3); CkU: When measuring the volume fraction of downstream pollutants, the volume fraction of upstream pollutants obtained by linear interpolation, in microliters per cubic meter or milliliters per cubic meter (μL/m3 or mL/m3); C*: ratio of downstream to upstream pollutant volume fraction, C*=CD(t)/CU, dimensionless; dpa: average particle size of the loosely packed adsorbent in millimeters (mm); dpM: projected diameter of particulate matter in millimeters (mm); D: internal diffusion coefficient of the material in square meters per second (m2/s); Dab: diffusion coefficient of gas in air in square meters per second (m2/s); EC: Purification efficiency (%) of the purification material or purification device under a given test volume fraction in the contamination capacity test; EEND: When the tester and the entrusting party negotiate to determine the termination of the test, the termination purification efficiency of the purification material or purification device (%); Ei: initial purification efficiency of the purification material or purification device (%); Fom: mass transfer Fourier number, dimensionless; hm: convective mass transfer coefficient on the material surface, in meters per second (m/s); 4.2 Abbreviations The following abbreviations apply to this document. MSDS: material safety data sheet NMP: n-methyl pyrrolidone) VOC: volatile organic compounds 5 Test methods for gas phase air purification materials 5.1 General provisions This chapter gives the test methods for resistance, pollution holding capacity, purification efficiency and pollution holding capacity/pollution holding rate of gas-phase air purification materials. 5.2 Purification material sample fixture and test bench 5.2.1 The sample fixture of purified material should have no leakage and no bypass airflow. The test airflow should be evenly mixed to ensure uniform wind speed and uniform concentration on the cross section. The structural diagram of the sample fixture is shown in Figure 1, and the standard measurement parameters shall comply with the requirements of Annex A. The sample fixture should be placed vertically, and the test airflow should be from top to bottom (when the elastic protective net is used to fix the material, the test airflow direction can also be from bottom to top). The test rig can connect multiple sample fixtures in parallel.