Synthesis method and application of monolithic nickel foam catalyst with 3D structure

A technology of a monolithic catalyst and a synthesis method, applied in the catalyst preparation technology and application field, can solve the problems of uneven distribution of active substances and easy aggregation, and achieve the effects of uniform distribution of active components, high catalytic activity, and overcoming the problem of wear and tear.

Inactive Publication Date: 2019-08-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some commonly used carriers, such as honeycomb ceramic cordierite, often have problems such as uneven distribution of active substances and easy aggregation during the coating or impregnation process.

Method used

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  • Synthesis method and application of monolithic nickel foam catalyst with 3D structure
  • Synthesis method and application of monolithic nickel foam catalyst with 3D structure
  • Synthesis method and application of monolithic nickel foam catalyst with 3D structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: a kind of foamed nickel monolithic catalyst with 3D structure is synthesized, and concrete steps are as follows:

[0037] (1) Soak foamed nickel (length×width=3.7cm×2.0cm, thickness: 1.5mm) in 30mL 0.1mol / L hydrochloric acid solution for 2 minutes, then ultrasonically clean it with absolute ethanol and distilled water for 5 minutes respectively, so that Clean the nickel foam and dry it at 60°C for 3 hours for use;

[0038] (2) Take by weighing cobalt nitrate: urea: NH 4 Dissolve F=1:5:6 in 36mL distilled water, mix well, and prepare solution A;

[0039] (3) Place nickel foam in solution A and move it into a hydrothermal reaction kettle, and grow it at 80°C for 3 hours at a time;

[0040] (4) After the reaction finishes, take out the reaction kettle and open it after cooling to room temperature naturally, and the nickel foam obtains substance B after cleaning and drying;

[0041] (5) Calcining material B in a muffle furnace at a temperature of 300° C. fo...

Embodiment 2

[0045] Example 2: Synthesis and application of a nickel foam monolithic catalyst with a 3D structure, its basic steps are the same as in Example 1, except that cobalt nitrate in step (2): urea: NH 4 F=1:5:1, the difference is that the primary growth temperature in step (3) is 120°C, and the time is 10 hours; the roasting temperature in step (5) is 350°C, and the roasting time is 3 hours; step (6) permanganate The potassium concentration is 0.035 mol / L, the secondary growth temperature is 140° C., and the time is 24 hours; the subsequent steps are as in Example 1, and the catalyst B that catalyzes the oxidation of VOCs containing oxygen is obtained.

[0046] Prepared catalyst B carries out fixed-bed reaction, and mixed gas contains the VOCs (ethyl acetate) of 1000ppm, and at space velocity is 50000h -1 , The test is carried out under the condition that the reaction temperature is 100-400°C. After stabilization, measure the concentration of VOCs in the gas at the inlet and outl...

Embodiment 3

[0047] Example 3: Synthesis and application of a foamed nickel monolithic catalyst with a 3D structure, its basic steps are the same as in Example 1, except that cobalt nitrate in step (2): urea: NH 4 F: CTAB=5:25:20:4, the primary growth temperature in step (3) is 160°C, and the time is 16 hours; the roasting temperature in step (5) is 800°C, and the roasting time is 6 hours; step (6) high manganese Potassium acid concentration was 0.1 mol / L, the secondary growth temperature was 160° C., and the time was 36 hours; the subsequent steps were as in Example 1 to obtain catalyst C that catalyzes the oxidation of VOCs containing oxygen.

[0048] Prepared catalyst C carries out fixed-bed reaction, and mixed gas contains the VOCs oxygen-containing (acetone) of 2000ppm, and at space velocity is 2000h -1 , The test is carried out under the condition that the reaction temperature is 100-400°C. After stabilization, measure the concentration of VOCs in the gas at the inlet and outlet of ...

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Abstract

The invention discloses a synthesis method for a monolithic nickel foam catalyst with a 3D structure and application of the monolithic nickel foam catalyst to treatment of volatile organic compounds,belonging to the technical field of preparation and application of catalysts. The method comprises the following steps: firstly, pretreating nickel (or iron, or copper) foam with hydrochloric acid; then at least weighing cobalt nitrate and urea, dissolving the weighed cobalt nitrate and urea in distilled water, and performing uniform mixing to form a solution A; performing a primary hydrothermal reaction to obtain a substance B and roasting the substance B in a muffle furnace to obtain a precursor; placing the precursor in a potassium permanganate solution, performing secondary reaction, and then carrying out washing and drying to obtain the catalyst. The metal foam and other chemicals used in the invention are cheap, easily-available and non-polluting materials; the synthesis method is simple in operation and meets the requirements for easiness, safety, energy conservation and environmental protection on preparation process. At the same time, the nickel foam is used as a carrier in the invention for preparation of the monolithic catalyst, so the catalytic effect, the service life and the water resistance of the catalyst are improved, and the defect that the active components of monolithic catalysts prepared by using conventional coating methods are easy to fall off is avoided; and thus, the industrial application of the catalyst is more advantageous.

Description

technical field [0001] The invention belongs to the field of catalyst preparation technology and application, and in particular relates to a synthesis method and application of a nickel foam monolithic catalyst with a 3D structure. Background technique [0002] According to the definition of the World Health Organization (WHO), Volatile Organic Compounds (Volatile Organic Compounds, VOCs) refer to various organic compounds with a boiling point between 50°C and 260°C under normal pressure. The composition of VOCs is complex, and can be divided into: alkanes, aromatics, esters, aldehydes, etc. according to their chemical structures. VOCs not only affect human health, but also form one of the important precursors of photochemical smog and ozone. Therefore, the control of VOCs is imminent. Among the VOCs treatment technologies, the catalytic oxidation method is considered to be one of the most promising methods due to its low operating temperature, high purification efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J27/128B01J27/24B01D53/86B01D53/72B01D53/44
CPCB01D53/8668B01D53/8687B01D2257/708B01J23/002B01J23/8892B01J27/128B01J27/24B01J2523/00B01J2523/72B01J2523/845B01J2523/847
Inventor 刘庆岭郑燕飞赵倩宋春风纪娜
Owner TIANJIN UNIV
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