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System and method for testing activity of vehicle exhaust purification catalytic material

An exhaust gas purification and catalytic material technology, which is applied in the preparation of test samples and chemical analysis using catalysis, can solve the problems of complex evaluation system, inability to meet the needs of the automobile exhaust catalyst industry, lack of evaluation methods, etc., and achieve repeatability. Good performance, realization of ignition temperature characteristics, simple evaluation method and process

Active Publication Date: 2010-10-13
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there have been reports (CN 1369627A, CN 101138702A, CN 201047836y, CN 2862035Y) on the evaluation system of catalytic materials for purification of motor vehicle exhaust, which are mainly aimed at the evaluation of the activity of certain vehicle catalysts. The evaluation system is complex and lacks corresponding evaluation methods, which cannot satisfy The demand of the rapidly developing motor vehicle exhaust catalyst industry

Method used

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  • System and method for testing activity of vehicle exhaust purification catalytic material
  • System and method for testing activity of vehicle exhaust purification catalytic material
  • System and method for testing activity of vehicle exhaust purification catalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix the three-way catalyst powder sample (600mg) with a certain amount of quartz sand evenly and put it into the reactor, and place the reactor in the heating furnace along the axial direction; set the temperature of the water vapor generator to 80°C, so that the water vapor volume concentration is 10% ;Simulated gasoline vehicle exhaust gas atmosphere: 2%CO+0.1%NO+0.1%C 3 h 8 +12%CO 2 +1.5%O 2 +N 2 (Balance gas) and the water vapor sent by the water gas generator are sent to the preheating tube in the heating furnace to preheat to 40°C; the simulated automobile exhaust and water vapor after preheating by the preheating tube (the total gas flow rate is 1.5L, the space velocity 50,000h -1) into the reactor, and the temperature in the reactor is raised at a rate of 10°C / min to increase the temperature in the reactor from 40°C to 700°C. React at a temperature of 700°C, and use an analyzer to continuously collect data online. Analyzer (NDIR) online detection reactor o...

Embodiment 2

[0034] three-way catalyst The monolithic honeycomb catalyst sample is loaded into the reactor, and the reactor is placed in the heating furnace along the axial direction; the temperature of the water vapor generator is set at 100°C, so that the water vapor volume concentration is 12%; the atmosphere of simulated gasoline vehicle exhaust: 2.2% CO+ 0.1%NO+0.1%C 3 h 8 +10%CO 2 +O 2 +N 2 (Balance gas) and water vapor sent by the water gas generator are sent to the preheating tube in the heating furnace to preheat to 100°C; the simulated automobile exhaust and water vapor after preheating by the preheating tube (the total gas flow rate is 1.5L, the air velocity 50,000h -1 ) into the reactor through the catalyst at a temperature of 500 ° C for 20 minutes of mixed reaction, and then use the analyzer to collect data. Adjust the lambda value by changing the oxygen flow, while adjusting the N 2 The flow rate keeps the total flow rate of the reaction gas constant at 1.5L, and the...

Embodiment 3

[0036] Take the SCR catalyst The monolithic honeycomb catalyst sample is loaded into the reactor, and the reactor is placed in the heating furnace in the axial direction; the temperature of the water vapor generator is set at 10°C, so that the water vapor volume concentration is 5%; the simulated diesel vehicle exhaust atmosphere: 0.035% NO+ 0.035%NH 3 +5%CO 2 +14%O2+0.01%8O 2 +N 2 (Balance gas) and the water vapor sent by the water gas generator are sent to the preheating tube in the heating furnace to preheat to 150 °C, and the simulated automobile exhaust and water vapor (with an air velocity of 50000h-1) after being preheated by the preheating tube are sent to the In the reactor, the temperature in the reactor is raised at a rate of 8°C / min to make the temperature in the reactor rise from 150°C to 550°C. React at a certain temperature, and use an analyzer (FTIR) to detect NO at the reactor outlet online x Concentration, calculated NO x Conversion rate, get SCR catal...

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Abstract

The invention discloses a system and a method for testing activity of a vehicle exhaust purification catalytic material. The method comprises the following steps of: filling and fixing the vehicle exhaust purification catalytic material into a reactor, wherein the reactor is axially arranged into a heating furnace; setting the temperature of a vapor generator in order to lead vapor in the vapor generator to achieve set volume concentration; preheating simulative vehicle exhaust and vapor transmitted by the vapor generator in a preheating pipe arranged in the heating furnace; transmitting the simulative vehicle exhaust and the vapor which are preheated by the preheating pipe into the reactor for reaction by a catalyst, and then, collecting data by an analyzer; and taking out the catalytic material which completes evaluation treatment along the axial direction of the reactor for a subsequent characteristic test. The evaluation method has simple process, low cost, good repeatability of an experimental result and wide application and can evaluate the initiation temperature characteristic and the air-fuel delivery ratio characteristic of a three-way catalyst of a gasoline car and the temperature window characteristic of a selective catalytic reduction catalyst of a diesel engine car.

Description

technical field [0001] The invention relates to a catalytic material activity testing system and testing method, in particular to a catalytic material activity testing system and testing method for motor vehicle tail gas purification catalytic materials in an artificially controllable atmosphere. Background technique [0002] With the acceleration of my country's urbanization process and the continuous development of the economic level, the number of motor vehicles presents a trend of rapid growth. The rapid development of the motor vehicle industry has brought serious environmental problems to human beings. At present, the use of catalytic purification technology is considered to be one of the most important means to effectively control motor vehicle exhaust pollution. Purification efficiency is an important index to measure the effect of catalytic converters on pollutant removal, so it is particularly important to evaluate the purification efficiency of catalytic converte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/10G01N1/44
Inventor 王建强王务林马杰李振国
Owner CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
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