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Heat storage type composite catalyst as well as preparation method and application thereof

A composite catalyst and heat storage technology, which is applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of cumbersome process and unfavorable industrial production, and achieve stability and maintenance Stability, the effect of reducing fluctuations

Pending Publication Date: 2021-10-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature window of the catalyst can be widened by modifying the SCR catalyst through the above process, which can ensure the catalytic activity of the catalyst at high or low temperatures, but the process of the process is cumbersome and unfavorable for industrial production.

Method used

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  • Heat storage type composite catalyst as well as preparation method and application thereof
  • Heat storage type composite catalyst as well as preparation method and application thereof
  • Heat storage type composite catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] This embodiment provides a heat storage composite catalyst, and the preparation method of the heat storage composite catalyst includes the following steps:

[0074] (1) mix V by ball milling at a speed of 300r / min according to the formula 2 o 5 / TiO 2 After 30 minutes of catalyst, heat storage material and matrix material, press under the gauge pressure of 10MPa for 2 minutes to obtain a cylinder with a diameter of 50 mm and a thickness of 3 mm; the V 2 o 5 / TiO 2 The mass fractions of catalyst, heat storage material and base material are 40wt%, 30wt% and 30wt% respectively; the heat storage material is NaNO 3 , the matrix material is SiO 2 ;

[0075] (II) heating up to 330°C at a rate of 8°C / min, calcining the cylinder obtained in step (d), and keeping it warm for 60min to obtain the heat storage type composite catalyst;

[0076] The heat storage material in step (I) is a pretreated heat storage material, and the pretreatment includes ball milling and drying in ...

Embodiment 2

[0082] This embodiment provides a heat storage composite catalyst, and the preparation method of the heat storage composite catalyst includes the following steps:

[0083] (1) mix V by ball milling at a speed of 300r / min according to the formula 2 o 5 / TiO 2 After 60 min of catalyst, heat storage material and matrix material, press under a gauge pressure of 2 MPa for 5 min to obtain a cylinder with a diameter of 15 mm and a thickness of 1 mm; the V 2 o 5 / TiO 2 The mass fractions of catalyst, heat storage material and base material are 50wt%, 20wt% and 30wt% respectively; the heat storage material is NaNO 3 , the matrix material is SiO 2 ;

[0084] (II) heating up to 330°C at a rate of 10°C / min, calcining the cylinder obtained in step (d), and keeping it warm for 180min to obtain the heat storage type composite catalyst;

[0085] The heat storage material in step (I) is a pretreated heat storage material, and the pretreatment includes ball milling and drying in sequence...

Embodiment 3

[0090] This embodiment provides a heat storage composite catalyst, and the preparation method of the heat storage composite catalyst includes the following steps:

[0091] (1) mix V by ball milling at a speed of 500r / min according to the formula 2 o 5 / TiO 2 After 30 minutes of catalyst, heat storage material and matrix material, press under the gauge pressure of 6MPa for 4 minutes, obtain the cylinder that diameter is 10mm, and thickness is 5mm; Said V 2 o 5 / TiO 2 The mass fractions of catalyst, heat storage material and base material are 30wt%, 30wt% and 40wt% respectively; the heat storage material is NaNO 3 , the matrix material is SiO 2 ;

[0092] (II) heating up to 330°C at a rate of 1°C / min, calcining the cylinder obtained in step (d), and keeping it warm for 120min to obtain the heat storage type composite catalyst;

[0093] The heat storage material in step (I) is a pretreated heat storage material, and the pretreatment includes ball milling and drying in sequ...

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Abstract

The invention provides a heat storage type composite catalyst as well as a preparation method and application thereof. The heat storage type composite catalyst is prepared from the following raw materials: a V2O5 / TiO2 catalyst, a heat storage material and a matrix material. The preparation method of the heat storage type composite catalyst comprises the following steps: (1) mixing a V2O5 / TiO2 catalyst, the heat storage material and the matrix material in proportion, and carrying out compression molding to obtain a composite catalyst blank; and (2) roasting the composite catalyst blank obtained in the step (1) to obtain the heat storage type composite catalyst. The heat storage type composite catalyst contains the heat storage material and can absorb heat of high-temperature flue gas or release heat to low-temperature flue gas, so that fluctuation of flue gas temperature can be reduced, stability of the temperature of the V2O5 / TiO2 catalyst is kept, and stability of catalytic activity is further kept.

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to a heat storage composite catalyst, in particular to a heat storage composite catalyst and its preparation method and application. Background technique [0002] Nitrogen oxides (NO x , mainly referring to NO and NO 2 ) is one of the main air pollutants, China's NO x 80% of the emissions come from the direct combustion of coal, especially for fixed combustion sources such as power stations, industrial boilers and glass kilns, to reduce NO emissions from fixed combustion sources x It is the focus of atmospheric environmental governance. The emission control technology of nitrogen oxides mainly includes low NO x Combustion technology and flue gas denitrification technology. Typically, various low NO x Combustion technology can only reduce NO at most x Discharge around 50%. The GB13223-2011 "Emission Standard of Air Pollutants for Thermal Power Plants" implemented since January 1, 2012 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C09K5/06B01D53/86B01D53/56
CPCB01J23/22B01J23/002C09K5/063B01D53/8628B01J2523/00B01D2258/0283B01J2523/41B01J2523/47B01J2523/55
Inventor 黄云王燕许东东王君雷
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI