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Device for preparing supported automotive catalyst with pulsating hydrogenation reduction method and application of device

A technology of catalyst and reduction method is applied in the field of devices for preparing CeO2 carrier vehicle catalyst by pulsating hydrogenation reduction method, which can solve the problems of high energy consumption and high cost carrier sintering and agglomeration.

Active Publication Date: 2017-09-19
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the invention is to develop a kind of pulsating hydrogenation reduction method to prepare novel CeO 2 The device and implementation method of the carrier vehicle catalyst aim to solve the current problem of CeO 2 The energy consumption and cost of the reduction method preparation device and process of carrier vehicle exhaust catalyst are relatively high, and the active components and CeO at the reaction temperature 2 Important technical bottlenecks such as sintering and agglomeration of carriers

Method used

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  • Device for preparing supported automotive catalyst with pulsating hydrogenation reduction method and application of device
  • Device for preparing supported automotive catalyst with pulsating hydrogenation reduction method and application of device
  • Device for preparing supported automotive catalyst with pulsating hydrogenation reduction method and application of device

Examples

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Embodiment 1

[0064] A device for preparing carrier vehicle catalysts by pulsating hydrogenation reduction method, its structure is as follows figure 1 As shown, the device consists of a heat-exchange hydrogen measuring cylinder assembly 2 connected to the feedback gas path control system assembly and a fluidized bed reactor assembly 1.

[0065] The reactor gas inlet 17-1 and the reactor gas outlet 17-2 of the fluidized bed reactor assembly 1 respectively pass through the gas path equipped with a vacuum pressure gauge and a shut-off valve and the heat exchange type hydrogen quantitative cylinder assembly 2 (its structure Such as figure 2 Shown) on the outer sleeve hydrogen outlet flange 22-4 and the inner tube reaction waste gas inlet flange 22-1 are connected.

[0066] The ebullating fluidized bed reactor assembly 1 includes: a temperature-resistant and pressure-resistant reactor shell of a closed structure made of high-strength temperature-resistant and pressure-resistant materials, the...

Embodiment 2

[0103] The device for preparing the carrier vehicle catalyst by the pulsating hydrogenation reduction method is composed of a heat-exchanging hydrogen metering cylinder assembly connected to the feedback gas path control system assembly and a bubbling fluidized bed reactor assembly, and the bubbling fluidized bed reactor assembly The gas inlet and gas outlet are respectively connected to the hydrogen outlet flange of the outer sleeve and the inlet flange of the inner tube reaction exhaust gas on the heat exchange type hydrogen measuring cylinder assembly through the gas circuit equipped with a vacuum pressure gauge and a stop valve.

[0104] The bubbling fluidized bed reactor assembly consists of the following components:

[0105] Temperature-resistant and pressure-resistant reactor shell: a closed structure made of high-strength temperature-resistant and pressure-resistant materials. The outer wall is covered with an insulating layer. The top cover of the reactor can be opened...

Embodiment 3

[0142] Utilize the device disclosed in embodiment 2 to carry out pulse type hydrogenation reduction method to prepare CeO 2 Carrier vehicle catalyst, including two steps of pretreatment and hydrogenation reduction reaction:

[0143] (1) Preprocessing steps:

[0144] (1-1) Extrude or extrude the reactant raw materials that meet the requirements of the process conditions in advance to make raw material particles of the required size and shape. The raw material particles used in this embodiment are made of CeO 2 Granules, activated carbon particles, and additives are mixed at a molar ratio of 100:8:5, and CeO 2 The particles are CeO prepared by gas phase combustion method 2 Submicron particles; additive is La 2 o 3 , BaO, Al 2 o 3 Micron-sized mixed powder, and also contains powder binder in the auxiliary agent;

[0145] (1-2) Calcining the raw material particles at a temperature of 850 degrees Celsius for 2 hours in a vacuum heating device under the protection of an inert...

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Abstract

The invention relates to a device for preparing a supported automotive catalyst with a pulsating hydrogenation reduction method and an application of the device. The device comprises a heat exchange type hydrogen quantifying cylinder assembly and a boiling fluidized bed reactor assembly which are connected through a feedback gas channel control system assembly, wherein a gas inlet and a gas outlet of the boiling fluidized bed reactor assembly are connected with an outer sleeve hydrogen outlet flange and an inner tube nest reaction exhaust gas inlet flange on the heat exchange type hydrogen quantifying cylinder assembly respectively through a gas channel equipped with vacuum pressure gauges and stop valves. Compared with the prior art, the device has the advantages that CeO2 particles serving as a catalyst supporter can be prevented from aggregation, and precious metal particles serving as active components can be prevented from growing and aggregation, so that the efficiency of preparation of the CeO2 supported automotive catalyst and catalytic activity of the product can be improved to a great extent.

Description

technical field [0001] The invention relates to a device for preparing a vehicle exhaust catalyst and its application, in particular to a pulsating hydrogenation reduction method for preparing CeO 2 The device and application of the carrier catalyst for vehicles. Background technique [0002] With the continuous development of my country's national economy and the improvement of people's living standards, the annual sales and ownership of domestic motor vehicles have continued to increase. In 2016, the number of motor vehicles in my country has reached 295 million, and it is still exceeding 20 million per year. The speed of the vehicle increases. The problem of automobile exhaust pollution is increasingly becoming the culprit of the increasingly serious air pollution in large and medium-sized cities. Research shows that more than 40% of NO in large cities x , more than 80% CO and more than 70% HC x All come from automobile exhaust, which has seriously affected the ecologi...

Claims

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Application Information

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IPC IPC(8): B01J8/24B01J8/18B01J23/63
CPCB01J8/1809B01J8/1827B01J8/1836B01J8/1872B01J8/24B01J23/002B01J23/63B01J2208/00415B01J2208/00539B01J2208/00902
Inventor 储德韧卢冠忠商照聪刘刚张小沁
Owner SHANGHAI RES INST OF CHEM IND
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