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Device for rapidly aging and evaluating SCR catalyst powder

An SCR catalyst and rapid aging technology, which is applied in the field of catalyst aging and evaluation test system devices, can solve the problems of difficult control of engine bench tests, inability to rapidly age catalysts, and inability to perform accurate exhaust gas simulation in fixed bed reactors. Avoid direct contact effects

Active Publication Date: 2015-04-29
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fixed-bed reactor cannot carry out accurate tail gas simulation, nor can it perform rapid aging of the catalyst, while the simulated tail gas bench test system cannot test small samples of the catalyst, and the engine bench test is difficult to control

Method used

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  • Device for rapidly aging and evaluating SCR catalyst powder
  • Device for rapidly aging and evaluating SCR catalyst powder
  • Device for rapidly aging and evaluating SCR catalyst powder

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Experimental program
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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing.

[0021] Such as figure 1 As shown, it is a diagram of the catalyst small sample reaction device, which is mainly composed of a connection and fixing device 101, a quartz tube 102, a steel pipe 103, an exhaust outlet 104, a quartz wool fixing device 105, and a quartz wool 106. The quartz tube used in the reaction is a general-purpose quartz tube for a fixed-bed reactor. The wall is thin and fragile and cannot withstand high pressure. If a metal tube is used directly, it is easy to cause the catalyst and tail gas components to react with it. Therefore, the outer side of the quartz tube is covered with a corresponding thin Steel tubes, quartz tubes and steel tubes are directly connected with corresponding ferrules and bolts. In order to prevent the catalyst from being blown away and blown away in the quartz tube, quartz wool and corresponding quartz wool fixing devices are ins...

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Abstract

The invention provides a device for rapidly aging and evaluating SCR catalyst powder. The device comprises a steel pipe with a size equal to a tail gas pipe, small sample reaction devices, a temperature sensor, a first NOx sensor and a second NOx sensor, wherein one end of the steel pipe is connected with a tail gas exhaust port, and a connecting device is arranged at the other end of the steel pipe; a main air outlet hole and small sample reaction device holes which are uniformly distributed around the main air outlet hole are formed in the connecting device; the small sample reaction devices are fixed in the small sample reaction device holes and are positioned in the steel pipe. According to the device disclosed by the invention, the defects of a fixed bed reactor and a simulated tail gas test system are overcome, the SCR catalyst can be subjected to rapid aging and preliminary evaluation by utilizing the tail gas of specified temperature provided by the simulated tail gas test system, and the problem that only the whole catalytic converter can be aged by the simulated tail gas test system is solved.

Description

technical field [0001] The invention relates to a test system device for catalyst aging and evaluation, in particular to a test device for rapid aging and preliminary evaluation of SCR catalyst powder samples in an exhaust gas simulation system. Background technique [0002] As people pay more attention to the environment and stricter emission regulations, automobile exhaust gas treatment technology is becoming more and more perfect, such as particle filter DPF for reducing exhaust particulate matter, three-way catalytic converter TWC for simultaneously treating CO, HC and NOx in exhaust gas, and reducing NO X The selective catalytic reduction device SCR, etc. Among them, selective catalytic reduction technology (SCR) can decompose urea and react with NOx in exhaust gas under the action of catalyst, and reduce NOx to pollution-free N 2 and H 2 O, which has minimal impact on the engine, better fuel economy, and lower requirements for fuel and engine oil quality, is widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
Inventor 李杏文吴锋姚栋伟魏铼干旭波张本西
Owner ZHEJIANG UNIV
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