CN109374467A - The method for measuring auto-exhaust catalyst coating uniformity - Google Patents
The method for measuring auto-exhaust catalyst coating uniformity Download PDFInfo
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- CN109374467A CN109374467A CN201811645946.8A CN201811645946A CN109374467A CN 109374467 A CN109374467 A CN 109374467A CN 201811645946 A CN201811645946 A CN 201811645946A CN 109374467 A CN109374467 A CN 109374467A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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Abstract
The present invention relates to a kind of methods for measuring auto-exhaust catalyst coating uniformity, belong to the technical field of auto-exhaust catalyst physical index measurement.If its dry sample A that finished catalyst after coating is slit longitudinally into etc. to heighti, assessment of weighing after drying and processing.Each sheet sample is cut into several pieces of sample A equal in magnitude againiBi, the sample A of different location is weighed after drying and processingiBiWeight, first more radial example weight difference assesses coating uniformity coefficient in more axial example weight difference.It is accurate, quick, intuitive, easy that the present invention has many advantages, such as, solves the problems, such as to need to detect coating by precision equipments such as XRF to coat the uniformity.
Description
Technical field
The present invention relates to a kind of methods for measuring auto-exhaust catalyst coating uniformity, belong to auto-exhaust catalyst object
Manage the technical field of index determining.
Background technique
One of main source as air pollution contains a large amount of harmful substance, including an oxidation in motor-vehicle tail-gas
Carbon, nitrogen oxides, hydrocarbon and solid suspended particle etc. become the PM of social concerns focus in the recent period2.5It is outstanding just to belong to solid
The scope of floating particles.Vehicle exhaust is in addition to being large size city PM2.5One of main source is outer or many urban atmospheric pollutions
One of arch-criminal.With the fast development of China's economy in recent years, there are large quantities of large size cities and several catches up in the country
The ultra-large type city of super world standard, is necessarily accompanied with the surge of vehicle guaranteeding organic quantity in the development process of city enlargement,
To bring huge pressure to atmospheric environment, the haze weather that China was broken out in recent years is exactly strong proof.
Automobile exhaust emission standard raising will be the most directly be also one of the most effective means.And tail gas is up to standard
Motor vehicle needs the excellent after-treatment system of performance indicator to support, that is, excellent catalyst treatment motor vehicle is needed to be discharged
Exhaust gas.Coating material is the core material of auto-exhaust catalyst, and the coating uniformity coefficient of coating material finally influences whether
The performance of catalyst and service life.So the coating uniformity coefficient of detection coating material, the production to guidance optimization catalyst coating
Technique, the production cost for controlling catalyst and the whole catalytic performance for improving catalyst have very great theory and reality meaning
Justice.
Summary of the invention
The purpose of the present invention is overcoming above-mentioned shortcoming, accurate, quick, the intuitive measurement vehicle exhaust of one kind is provided and is urged
The method of agent coating uniformity.
Technical solution of the present invention, a method of measurement auto-exhaust catalyst coating uniformity, by car tail
The sampling of gas catalyst, the uniformity coated using weight method Measurement and evaluation catalyst coat；Specific step is as follows:
(1) it measures for the first time:
The preparation of a1, sample: finished catalyst sample after coating is cut into etc. to several sheet samples of height with machine
Ai；
B1, measurement sample treatment: by the catalyst sample of well cutting is placed on the baking oven that temperature is 95-105 DEG C obtained by a1
Sample taking-up is put and is cooled to room temperature with drier by middle baking 0.4-0.6 hours；
The measurement of c1, weight: sample A obtained by b1 is weighed with assay balanceiWeight, and it is recorded as mi；
D1, average weight and standard deviation；
(2) it measures for second:
The preparation of a2, sample: sheet sample obtained by a1 is cut into the consistent several pieces of sample A of length and widthiBj；
B2, measurement sample treatment: the catalyst sample of a2 well cutting is placed in the baking oven that temperature is 95-105 DEG C and is dried
It is 0.4-0.6 hours roasting, the taking-up of gained sample is placed in drier and is cooled to room temperature；
The measurement of c2, weight: sample A obtained by b2 is weighed with assay balanceiBiWeight, and it is recorded as mij；
D2, it calculates radially, axially and the average weight and deviation of whole sample.
Further, the assay balance precision is to 1mg.
Further, step b1 and baking time described in b2 are identical with temperature.
Further, step d average weight is according to the following formula:
In formula, M1、M2For average weight, unit g；I is bulk sample number, and j is the j sample in the i-th bulk sample；miFor
The weight of i-th of bulk sample, unit g；mijFor the j example weight in the i-th bulk sample, unit g；u1It is inclined for axial coating
Difference ,≤3.5%, u2Deviation is coated to be axial ,≤2%；
Further, after step a1 and a2 is cut, the whole permeability of intuitive observation trapping class catalyst.
Beneficial effects of the present invention: the present invention measures catalyst coating uniformity coefficient by weight method, specifically mentions to claim
The example weight of different location is measured, and carries out comparative assessment.The simplest method of the present invention, accurate, quick, intuitive assessment
The uniformity coefficient of auto-exhaust catalyst coating coating.
Detailed description of the invention
Fig. 1 is sample preparation schematic diagram of the present invention.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated.
The invention discloses a kind of methods of test catalyst coat coating uniformity, i.e., catalysis is measured by weight method
Agent coats uniformity coefficient.Itself specifically includes the following steps:
The preparation of a1, sample: the finished catalyst sample after coating is cut into etc. to the sheet sample A of height with machine1
~A4。
B1, measurement sample treatment: it is small that the catalyst sample of well cutting is placed on baking 0.5 in the baking oven that temperature is 100 DEG C
When, sample taking-up is put and is cooled to room temperature with drier.
The measurement of c1, weight: with assay balance, (precision to 1mg) weighs example weight, and records weight.
1 sheet sample metrical information of table
D1, average weight and deviation.
The preparation of a2, sample: the sample A for being 13mm*13mm by sheet sample cut growth * wide obtained by a11B1~A1B5、
A2B1~A2B5、A3B1~A3B5、A4B1~A4B5。
B2, measurement sample treatment: it is small that the catalyst sample of well cutting is placed on baking 0.5 in the baking oven that temperature is 100 DEG C
When, sample taking-up is put and is cooled to room temperature with drier.
The measurement of c2, weight: with assay balance, (precision to 1mg) weighs sample and records.
D2, it calculates radially, axially and the average weight and deviation of whole sample.
2 sample metrical information of table
As can be seen that the coated catalyst coating uniformity is preferable from measurement result, the result of measurement is reliable,
Strong efficiently data information is provided for the process for producing of catalyst.
The present invention by weight method to catalyst sample carry out treated measurement can quickly provide catalyst coating it is equal
Even degree value not only provided effective direct data information, but also has improved the working efficiency of detection.
Claims (5)
1. a kind of method for measuring auto-exhaust catalyst coating uniformity, it is characterized in that: by auto-exhaust catalyst
Sampling, the uniformity coated using weight method Measurement and evaluation catalyst coat；Specific step is as follows:
(1) it measures for the first time:
The preparation of a1, sample: finished catalyst sample after coating is cut into etc. to several sheet sample A of height with machinei；
B1, measurement sample treatment: by the catalyst sample of well cutting is placed in the baking oven that temperature is 95-105 DEG C and dries obtained by a1
It is 0.4-0.6 hours roasting, sample taking-up is put and is cooled to room temperature with drier；
The measurement of c1, weight: sample A obtained by b1 is weighed with assay balanceiWeight, and it is recorded as mi；
D1, average weight and standard deviation；
(2) it measures for second:
The preparation of a2, sample: sheet sample obtained by a1 is cut into the consistent several pieces of sample A of length and widthiBj；
B2, measurement sample treatment: the catalyst sample of a2 well cutting is placed in the baking oven that temperature is 95-105 DEG C and is toasted
0.4-0.6 hours, the taking-up of gained sample is placed in drier and is cooled to room temperature；
The measurement of c2, weight: sample A obtained by b2 is weighed with assay balanceiBiWeight, and it is recorded as mij；
D2, it calculates radially, axially and the average weight and deviation of whole sample.
2. the method for measurement auto-exhaust catalyst coating uniformity as described in claim 1, it is characterized in that: the assay balance
Precision is to 1mg.
3. the method for measurement auto-exhaust catalyst coating uniformity as described in claim 1, it is characterized in that: step b1 and b2 institute
It is identical with temperature to state baking time.
4. the method for measurement auto-exhaust catalyst coating uniformity as described in claim 1, puts down it is characterized in that: step d is calculated
Equal weight is according to the following formula:
In formula, M1、M2For average weight, unit g；I is bulk sample number, and j is the j sample in the i-th bulk sample；miIt is i-th
The weight of bulk sample, unit g；mijFor the j example weight in the i-th bulk sample, unit g；u1Deviation is coated to be axial ,≤
3.5%, u2Deviation is coated to be axial ,≤2%.
5. as described in claim 1 measurement auto-exhaust catalyst coating uniformity method, it is characterized in that: step a1 and a2 into
After row cutting, the whole permeability of intuitive observation trapping class catalyst.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811980A (en) * | 2020-08-17 | 2020-10-23 | 上海海蔚科技有限公司 | Portable diesel vehicle tail gas detection device |
| CN113426600A (en) * | 2021-07-09 | 2021-09-24 | 飞荣达科技(江苏)有限公司 | Method for controlling flux coating amount of brazing liquid cold plate |
| CN113820245A (en) * | 2021-09-14 | 2021-12-21 | 靖江市弘锦环保科技有限公司 | Automatic on-line weighing system for honeycomb coating applied to automobile exhaust system |
| CN114932703A (en) * | 2022-07-22 | 2022-08-23 | 广饶县计量测试检定所(广饶县产品质量检验所、广饶县橡胶轮胎产品与材料质量检验中心) | Method for detecting weight uniformity of semi-finished tire |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811980A (en) * | 2020-08-17 | 2020-10-23 | 上海海蔚科技有限公司 | Portable diesel vehicle tail gas detection device |
| CN113426600A (en) * | 2021-07-09 | 2021-09-24 | 飞荣达科技(江苏)有限公司 | Method for controlling flux coating amount of brazing liquid cold plate |
| CN113426600B (en) * | 2021-07-09 | 2024-03-19 | 飞荣达科技(江苏)有限公司 | Control method for brazing flux coating amount of brazing liquid cooling plate |
| CN113820245A (en) * | 2021-09-14 | 2021-12-21 | 靖江市弘锦环保科技有限公司 | Automatic on-line weighing system for honeycomb coating applied to automobile exhaust system |
| CN113820245B (en) * | 2021-09-14 | 2023-12-19 | 靖江市弘锦环保科技有限公司 | Automatic on-line weighing system of honeycomb coating applied to automobile exhaust gas exhaust system |
| CN114932703A (en) * | 2022-07-22 | 2022-08-23 | 广饶县计量测试检定所(广饶县产品质量检验所、广饶县橡胶轮胎产品与材料质量检验中心) | Method for detecting weight uniformity of semi-finished tire |
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