Detection method for vanadium trace amount evaporation rate of vanadium-based selective catalyst

A detection method and catalyst technology, applied in the preparation of test samples, analysis materials, instruments, etc., to achieve the effect of simple calculation method, reduction of dilution links, and reduction of digestion difficulty
CN104297100AActive Publication Date: 2015-01-21CHINA AUTOMOTIVE TECH & RES CENT
4 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA AUTOMOTIVE TECH & RES CENT
Publication Date
2015-01-21

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a detection method for the vanadium trace amount evaporation rate of a vanadium-based SCR (Selective Catalytic Reduction) catalyst. According to the detection method provided by the invention, by adopting the method that existing element titanium is taken as a marker to the calculate vanadium trace amount evaporation rate in a catalyst formula, the segregation effect on the result during a sampling process and a sample preparing process is avoided; the marker has the characteristics that the chemical property is stable under usage conditions, and the marker is non-volatile and easy to measure; moreover, the method is reliable, simple and practicable, and is wide in applicability.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of analysis, test and evaluation, and relates to a method for detecting the vanadium trace volatilization rate before and after aging of a vanadium-based selective catalytic reduction (SCR) catalyst with titanium as a marker. Background technique

[0002] Studies have shown that nitrogen oxides (NOx) emitted by vehicles powered by diesel engines x ) is the main cause of haze weather, PM2.5 pollution, and photochemical smog, especially in Beijing, Shanghai, and Guangzhou, where about 20% to 50% of NO x from diesel vehicles. Selective catalytic reduction (NH 3 -SCR) technology for NO x The removal rate can reach more than 90%. At the same time, it can also reduce the emission of PM after optimizing and matching with the engine combustion process. x The preferred technical measure for emissions is recognized as a necessary technology for diesel engine emissions to meet National IV or higher standards. The ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More