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HJ 1137-2020 English PDF

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HJ 1137-2020: Measurement Methods for Non-Regulated Emissions From Methanol Fuelled Vehicles
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HJ 1137-2020	English	379	Add to Cart	4 days [Need to translate]	Measurement Methods for Non-Regulated Emissions From Methanol Fuelled Vehicles	Valid	HJ 1137-2020

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Basic data

Standard ID	HJ 1137-2020 (HJ1137-2020)
Description (Translated English)	Measurement Methods for Non-Regulated Emissions From Methanol Fuelled Vehicles
Sector / Industry	Environmental Protection Industry Standard
Word Count Estimation	18,151
Date of Issue	2020-11-10
Date of Implementation	2020-11-10
Regulation (derived from)	Ministry of Ecology and Environment Announcement No. 49 [2020]
Issuing agency(ies)	Ministry of Ecology and Environment

HJ 1137-2020: Measurement Methods for Non-Regulated Emissions From Methanol Fuelled Vehicles

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Measurement Methods for Non-Regulated Emissions From Methanol Fuelled Vehicles attachment1 National Environmental Protection Standards of the People's Republic of China 2020-11-10 release 2020-11-10 Implementation Issued by the Ministry of Ecology and Environment Measurement method of unconventional pollutant emissions from methanol fuel vehicles

Foreword...II 1 Scope of application...1 2 Normative references...1 3 Terms and definitions...1 4 Measurement and analysis methods of unconventional pollutants...2 5 Test fuel...5 6 Implementation of the standard...6 Appendix A (Normative Appendix) Sampling methods for formaldehyde and methanol in exhaust gas from automobiles and engines...7 Appendix B (Normative Appendix) Determination of Formaldehyde in Automobile and Engine Exhaust High Performance Liquid Chromatography...9 Appendix C (Normative Appendix) Determination of Methanol in Automobile and Engine Exhaust Solid Phase Adsorption/Headspace-Gas Chromatography Mass Spectrometry...13

Foreword

To implement the "Environmental Protection Law of the People's Republic of China" and "The Air Pollution Prevention Law of the People's Republic of China" to prevent and control motor vehicles To discharge pollutants, improve the environmental air quality, formulate this standard. This standard specifies light-duty vehicles, heavy-duty engines and vehicles (including diesel/methanol dual-fuel engines and Automobile) Measuring method of formaldehyde and methanol in exhaust gas. Appendix A to Appendix C of this standard are normative appendices. This standard is issued for the first time. This standard was formulated by the Department of Atmospheric Environment and the Department of Regulations and Standards of the Ministry of Ecology and Environment. Drafting organizations of this standard. Beijing Institute of Technology, Chinese Academy of Environmental Sciences, Xiamen Environmental Protection Motor Vehicle Pollution Control Technology Technology Center, Guangzhou Guangdian Metrology and Testing Co., Ltd. This standard was approved by the Ministry of Ecology and Environment on November 10, 2020. This standard shall be implemented from the date of issuance. This standard is interpreted by the Ministry of Ecology and Environment. Measurement method of unconventional pollutant emissions from methanol fuel vehicles

1 Scope of application

This standard specifies light-duty vehicles, heavy-duty vehicles and engines that use methanol fuel, including methanol single fuel and diesel/ Measurement method of formaldehyde and methanol in exhaust gas of methanol dual-fuel vehicles and engines. Other unconventional pollutants emitted by automobiles and engines related to the use of methanol fuel can be measured with reference to this standard method.

2 Normative references

This standard quotes the following documents or their clauses. For undated references, the latest version is applicable to this standard. GB 14763 Limits and measurement methods of fuel evaporative pollutants emission from heavy-duty vehicles with ignition engines (collection method) GB 17691-2018 Pollutant emission limits and measurement methods for heavy-duty diesel vehicles (China Phase 6) GB 18352.6-2016 Light-duty vehicle pollutant emission limits and measurement methods (China Phase 6) GB/T 15089-2001 Classification of motor vehicles and trailers GB/T 23510-2009 Vehicle fuel methanol

3 Terms and definitions

The following terms and definitions apply to this standard. 3.1 Vehicle of category M1, M2, M3, N1, N2, N3 vehicle of category M1, M2, M3, N1, N2 and N3 According to GB/T 15089-2001. Type M1 vehicles refer to passenger vehicles with no more than nine seats including the driver's seat; M2 category vehicles refer to passenger vehicles with more than nine seats, including the driver's seat, and the maximum design total mass not exceeding 5000kg; M3 category vehicles refer to passenger vehicles with more than nine seats including the driver's seat, and with a maximum designed total mass exceeding 5000kg; Category N1 vehicles refer to cargo vehicles whose maximum designed total mass does not exceed 3500kg; N2 category vehicles refer to the cargo vehicles whose maximum design total mass exceeds 3,500kg but does not exceed 12,000kg; N3 category vehicles refer to cargo vehicles with a maximum design total mass exceeding 12000kg. 3.2 Non-regulated emissions Pollutants emitted by automobiles other than CO, THC, NOx and particulate matter. In this standard, unconventional pollutants refer to formaldehyde and methanol. 3.3 Light-duty vehicle M1, M2 and N1 cars with a maximum design total mass not exceeding 3500kg. 3.4 Heavy-duty vehicle M1, M2, M3, N2 and N3 cars with a maximum design total mass greater than 3500kg. 3.5 Methanol fuel vehicle M and N category vehicles equipped with methanol single fuel engine or diesel/methanol dual fuel engine. 3.6 Methanol mono-fuel vehicle A car equipped with a methanol mono-fuel engine. 3.7 Diesel/methanol dual-fuel vehicle A car equipped with a diesel/methanol dual fuel engine. 3.8 Methanol mono-fuel engine For engines that use vehicle fuel methanol as fuel, gasoline can be used as an auxiliary fuel for engine starting. 3.9 Diesel/methanol dual-fuel engine It has two fuel supply systems, diesel and vehicle fuel methanol, and the two fuels are separately controlled by the engine electronic control unit. The injection works by compression ignition of diesel fuel to ignite methanol, and mixed combustion in the cylinder.

4 Measurement and analysis methods of unconventional pollutants

4.1 Measurement of unconventional pollutants from light methanol fuel vehicles 4.1.1 Exhaust unconventional pollutant emission test 4.1.1.1 The test cycle should be carried out in accordance with the requirements of Appendix C of GB 18352.6-2016.It is recommended to use a dilution air purification system to The dilution air entering the dilution channel is fully purified to control the THC concentration in the dilution air below 1 ppm. 4.1.1.2 According to the requirements of Appendix A of this standard, collect the diluted exhaust gas in each sampling bag (or in the dilution channel) with a sampling pipe. In formaldehyde and methanol. 4.1.1.3 Deterioration correction shall be made to the calculation results of the test. The degradation coefficient of unconventional pollutants can be in accordance with GB 18352.6-2016 The procedures described in Appendix G are determined by the actual durability test on the chassis dynamometer or in the test field, or according to GB 18352.6-2016 The engine bench aging test method described in Appendix G.3 is determined by the actual durability test, or the GB 18352.6-2016 is selected. The recommended degradation factor for the specified THC. 4.1.2 Evaporative pollutant discharge test 4.1.2.1 The fuel evaporation test should be carried out in accordance with the requirements of Appendix F in GB 18352.6-2016, and the methanol and gasoline tests should be carried out at the same time. Evaporation test. The results of the evaporative pollutant emission test are the evaporation of methanol fuel and the evaporated hydrocarbons in other links except methanol fuel. The sum of the evaporated compounds. Sampling and analyzing the methanol concentration in the closed room according to the methods specified in Appendix A and Appendix C, press The following formula calculates the evaporative emissions of each stage. 4.1.2.3 When using a silica gel sampling tube to determine the methanol vapor concentration in a closed room, the sampling of the initial reading shall be performed during the evaporation test. Before starting, make sure that the end of sampling is consistent with the beginning of the hot soak test; the end of the reading (including the day and night ventilation test) Two 24-hour readings) should be taken after the evaporation test, and make sure that the start of sampling is consistent with the end of the corresponding test. The beam time is the same; the first 24-hour reading of the day and night ventilation test should be sampled from the test to the 23rd hour (60-t/2) It is carried out between 20 minutes and 24 hours t/2 minutes (t is the sampling time of methanol). 4.1.2.4 Deterioration correction should be made to the test results, and the degradation correction value shall be the type IV test determined in 5.3.5 of GB 18352.6-2016. Check the deterioration correction value. 4.1.3 Refueling pollutant discharge test 4.1.3.1 The test method shall be carried out in accordance with the requirements of Appendix I in GB 18352.6-2016, only measuring the pollutants discharged by methanol refueling. 4.1.3.2 Methanol fueling emissions shall be based on the initial methanol concentration, temperature and pressure of the sealed chamber before and after methanol fuel filling. And the final reading, and the effective volume of the closed room are calculated according to the following formula, the methanol concentration in the closed room is sampled and analyzed The analysis method is carried out in accordance with Appendix A and Appendix C. 4.1.3.2 When using a silica gel sampling tube to determine the methanol vapor concentration in a closed room, the initial reading should be sampled at the beginning of the evaporation test. Make sure that the end of sampling is consistent with the beginning of the hot soak test; the sampling of the final reading should be done after the end of the evaporation test Immediately, and make sure that the start time of sampling is consistent with the end of the test. 4.1.3.3 The final result of the pollutant emission test during the refueling process should be divided by the total mass of fuel delivered by the hydrocarbon emission quality of the refueling test The product number is calculated as follows. 4.1.3.4 The test results shall be degraded and corrected. The deterioration correction value uses the type Ⅶ test determined in 5.3.5 of GB 18352.6-2016 Deterioration correction value. 4.2 Measurement of unconventional pollutants in heavy-duty methanol-fuel vehicles and heavy-duty diesel/methanol dual-fuel vehicles 4.2.1 Exhaust unconventional pollutant emission test 4.2.1.1 The test cycle shall be performed on the engine bench in accordance with C6.2.1 Transient Test Cycle (WHTC) in GB 17691-2018 If required, the dilution air purification system should be used to purify the dilution air entering the dilution channel. 4.2.1.2 According to the requirements of Appendix A of this standard, the cold start dilution exhaust gas sampling air bag and the hot start dilution shall be collected with sampling pipes. The formaldehyde and methanol in the exhaust gas sampling bag (also can be sampled simultaneously in the dilution channel). According to Appendix B and Appendix C of this standard The prescribed methods are used for the determination of formaldehyde and methanol, and the emissions are calculated using the following formula. 4.2.1.3 Endurance corrections should be made to the test calculation results. The degradation coefficient of unconventional pollutants can be calculated in accordance with GB 17691-2018 The requirements of H3.5 are obtained through the durability test, and the THC degradation coefficient recommended by H3.6 in GB 17691-2018 can also be used. 4.2.2 Evaporative pollutant discharge test The methanol evaporative emission test of heavy-duty methanol single-fuel engine or automobile, and heavy-duty diesel/methanol dual-fuel engine or automobile, It should be carried out in accordance with the requirements of the GB 14763 standard.

5 Test fuel

5.1 The methanol fuel used in the test shall meet the requirements of GB/T 23510-2009 and subsequent M100 methanol fuel national standards for vehicles. 5.2 The gasoline and diesel used in the test should meet the technical requirements of the benchmark fuel in GB 18352.6-2016 and GB 17691-2018.

6 Implementation of standards

From the date of publication of this standard, type inspection can be carried out in accordance with this standard.

Appendix A

(Normative appendix) Sampling method of formaldehyde and methanol in automobile and engine exhaust A.1 Scope of application A.1.1 This appendix specifies the sampling method of formaldehyde and methanol in the exhaust of light methanol fuel vehicles and heavy methanol fuel engines. Including sampling system, methods, transportation and storage, as well as quality assurance and control during the sampling process. A.1.2 This appendix applies to light-duty or heavy-duty vehicles running on the chassis dynamometer, or engines running on the full-flow emission test bench. When conducting an emission test, the exhaust gas of a car or engine is diluted by a constant volume dilution system (CVS) and then placed in a sampling air bag or diluted Collect the formaldehyde and methanol in the diluted exhaust gas in the tunnel. A.2 Sampling A.2.1 Sample collection system A.2.1.1 The sample collection system consists of a constant flow gas sampler, a sampling tube, a packed column sampling tube, etc. A.2.1.2 The flow rate of the constant flow gas sampler is adjustable within the range of 0 ~.2000 ml/min, and the flow rate is stable. When using packed column sampling tube to adjust When reducing the gas flow rate and using a primary flow meter (such as a primary soap film flow meter) to calibrate the flow, it should meet the requirements of small flow Within the requirement of ±5%. A.2.1.3 The sampling conduit should use polytetrafluoroethylene tube or silicone rubber tube. The air inlet of the sampling duct is fixed at the outlet of the sampling air bag, Lead out from the air bag in an appropriate way, so that the overall sealing of the sampling system should not be damaged. The air outlet of the sampling catheter and the outside of the sampling air bag The packed column sampling tube is connected, and the end of the packed column sampling tube is connected with a constant flow gas sampler. It is also possible to collect dilute in the dilution channel For release and exhaust, please refer to the connection method of diluent bag sampling. A.2.1.4 The air tightness of the entire sample collection system should be ensured. A.2.1.5 Packed column sampling tube should meet the corresponding regulations in Appendix B and Appendix C. A.2.2 Sample collection process A.2.2.1 Use a solid phase adsorbent packed column sampling tube that meets the requirements of this standard to collect formaldehyde and methanol in the exhaust gas. The sampling can be selected Carry out at point A or point B shown in Figure A.1 (point A corresponds to the air collection bags of each group of the CVS system, and point B corresponds to the sampling in the dilution channel of the CVS system Samples can be sampled before and after the heat exchanger), and then install the two ends of the packed column sampling tube on the sample collection system, and use Constant flow gas sampler for sample gas collection. Figure A.1 Schematic diagram of formaldehyde or methanol emission sampling A.2.2.2 Two or more sampling tubes should be connected in series for sampling. The analysis result is the sum of the adsorption amount of each sampling tube. is behind In the subsequent analysis, the mass of formaldehyde or methanol measured in the last sampling tube downstream should be less than the mass of all other sampling tubes upstream Of 10.0%. A.2.2.3 When using a packed column sampling tube to collect formaldehyde, the recommended sampling flow rate is between 500 ml/min ~1000 ml/min. The sampling volume should be recorded accurately between 15 minutes and 30 minutes. The sampling volume of each sampling tube should not be less than 15L. A.2.2.4 When using a packed column sampling tube to collect methanol, the recommended sampling flow rate is between 100 ml/min ~500 ml/min. The sampling volume should be recorded accurately between 15 min and 90 min. The sampling volume of each sampling tube should not be less than 9L. A.2.3 Transportation and storage of samples The mouth of the sampling tube should be sealed with a sealing cap, and the sampling tube should be tightly wrapped with aluminum foil, and stored under refrigerated conditions (4℃-10℃). For transportation, the storage time should not exceed 30 days. A.3 Analysis A.3.1 The determination of formaldehyde in exhaust gas adopts high performance liquid chromatography, according to the provisions of Appendix B of this standard. A.3.2 The determination of methanol in the exhaust gas adopts headspace-chromatographic mass spectrometry, and is carried out in accordance with the provisions of Appendix C of this standard. A.4 Quality assurance and control A.4.1 Instrument requirements The instruments and equipment used in sampling and analysis should meet the relevant requirements of national metrology certification, and be calibrated and The quantity is verified and within the validity period. A.4.2 Air tightness check The air tightness of the sampling system should be checked before sampling, and there should be no air leakage. A.4.3 Flow calibration Before each sampling, a first-level flowmeter (such as a first-level soap film flowmeter) should be used to calibrate the sampling flow of the sampling system under sampling load conditions. A 4.4 Laboratory blank inspection For silica gel adsorption tubes, ensure that the blank verification of each batch of sampling tubes meets that methanol is less than 0.1 µg/tube; it has been filled with stains The sampling tube of DNPH silica gel shall ensure that the blank verification of each batch of sampling tubes meets that the formaldehyde is less than 0.15 µg/tube. A 4.5 Blank inspection of the whole procedure Make at least one blank sample of the whole procedure for each batch of samples. When the content of the target compound in the blank sample of the whole procedure is too large and suspicious, you should Verify and check the batch data. A.4.6 Parallel sample inspection If conditions permit, two sets of sampling tubes can be used for parallel sampling, and the relative deviation between the measured value and the arithmetic mean value is not Should exceed ±20%. B.1 Scope of application This appendix specifies the analysis method of formaldehyde in the exhaust gas of vehicles and heavy-duty engines that use methanol fuel. Analysis and determination of formaldehyde in engine exhaust. When the sampling volume is 15L, it is eluted with 5ml acetonitrile and 20μL is injected. The detection limit is 0.001mg/m3, and the detection limit is 0.004mg/m3. B.2 Principle of the method B.2.1 Select a packed column sampling tube filled with coated 2,4-dinitrophenylhydrazine (DNPH) silica gel, and collect a certain volume of dilution row Gas sample, the formaldehyde in the sample remains in the sampling tube. The formaldehyde component is coated on silica gel with strong acid as a catalyst According to the following reaction formula, a stable and colored hydrazone derivative is generated by the DNPH reaction. Figure B.1 Principle of formaldehyde sampling and analysis B.2.2 Use the ultraviolet or diode array detector of high performance liquid chromatograph for detection, qualitative by retention time, peak area (Or peak height) quantitative. B.3 Reagents and materials B.3.1 DNPH sampling tube The sampling tube that has been filled with DNPH silica gel, the filling amount is not less than 1.0 mg, and the blank verification of each batch of sampling tubes should be ensured Meet the requirement that formaldehyde is less than 0.15µg/tube. B.3.2 High-purity acetonitrile (special mobile phase for high-performance liquid chromatography (HPLC)) UV grade pure, the concentration of formaldehyde should be less than 1.5 ng/ml. B.3.3 Standard sample (reference material) B.3.3.1 Use standard gas, liquid or solid to prepare standard gas of required concentration, and use constant flow gas sampler to sample it quantitatively. Collected into the DNPH sampling tube to form a standard series. The analyte concentration of the prepared standard series is comparable to the concentration of the sample to be analyzed like. During the collection process, the standard gas should be collected at the same flow rate as the sampling. B.3.3.2 The 2,4-dinitrophenylhydrazone liquid standard sample (standard substance) of formaldehyde can be purchased directly, or a solid standard sample can be used The standard series of products (standard materials) are prepared by ourselves.

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