Preparation method of VOCs catalytic oxidation catalyst and obtained catalyst

A catalytic oxidation and catalyst technology, which is applied in the field of VOCs treatment, can solve the problems of low activity, scarce resources, and easy poisoning of VOCs, and achieve the effects of uniform pore distribution, increased specific surface area, and improved catalytic efficiency

Pending Publication Date: 2022-08-05
湖南立泰环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] VOCs catalytic oxidation catalyst is the core of VOCs treatment by catalytic oxidation method. At present, high-activity and long-life catalysts mainly use noble metals such as platinum, palladium, and rhodium as active substances, but their resources are scarce and expensive, and the treatment contains S, Cl, As, etc. VOCs are easily poisoned
However, other transition metal oxide catalysts have problems such as low activity and short life.

Method used

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  • Preparation method of VOCs catalytic oxidation catalyst and obtained catalyst
  • Preparation method of VOCs catalytic oxidation catalyst and obtained catalyst
  • Preparation method of VOCs catalytic oxidation catalyst and obtained catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] see figure 1 , a preparation method of a VOCs catalytic oxidation catalyst, comprising the following steps:

[0032] Acid etching: acid etching the carrier; drying; obtaining the acid etching carrier; the pH of the acid used is 4~6, the acid etching time is 0.5~4h, and the acid etching temperature is 20~80℃; the drying time is 6~12h, and the drying temperature 80-120°C (in this embodiment, the pH of the acid used is 5, the acid etching time is 2h, and the acid etching temperature is 60°C; the drying time is 10h, and the drying temperature is 100°C).

[0033] Coating roasting: coating a coating material on the surface of the acid-etched carrier; drying; roasting to obtain a coated carrier; the drying temperature is 80-120°C, and the drying time is 2-6h; the roasting temperature is 300-600°C , the roasting time is 2~6h, and the roasting heating rate is 2~8℃ / min (in this embodiment, the drying temperature is 100℃, and the drying time is 2h; the roasting temperature is 600...

Embodiment 2

[0046] Example 2: The difference from Example 1 is that the amount of the coating material is 25% of the weight of the acid-etched carrier; the loading amount of the precursor solution is 40% of the weight of the coating carrier; The molar ratio of diaspore, niobium salt, yttrium salt and strontium salt is 8:1:1:0.5; the metal element in the coating material accounts for 11% of the total mass of the coating material; the manganese salt, vanadium salt, The molar ratio of molybdenum salt and nickel salt is 2:5:1.5:0.5; the total concentration of metal ions in the precursor solution is 3.5mol / L.

Embodiment 3

[0047] Example 3: The difference from Example 1 is that the amount of the coating material is 28% of the weight of the acid-etched carrier; the loading amount of the precursor solution is 20% of the weight of the coating carrier; The molar ratio of diaspore, niobium salt, yttrium salt and strontium salt is 9:1.5:1.5:1; the metal element in the coating material accounts for 18% of the total mass of the coating material; the manganese salt, vanadium salt, The molar ratio of molybdenum salt and nickel salt is 3:7:2:1; the total concentration of metal ions in the precursor solution is 5mol / L.

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Abstract

The invention provides a preparation method of a VOCs catalytic oxidation catalyst. The preparation method comprises the following steps: acid etching: carrying out acid etching on a carrier; performing drying; an acid etching carrier is obtained; wherein the pH value of the acid is 4-6, the acid etching time is 0.5-4 hours, and the acid etching temperature is 20-80 DEG C; the drying time is 6-12 hours and the drying temperature is 80-120 DEG C; coating roasting: coating the surface of the acid etching carrier with a coating material; roasting after drying to obtain a coating carrier; roasting the precursor: dip-coating the precursor solution on the surface of the coating carrier; and drying and roasting to obtain the catalyst. The obtained catalyst has the advantages of being high in catalytic capacity, low in cost and long in service life.

Description

technical field [0001] The invention relates to the technical field of VOCs treatment, in particular to a preparation method of a VOCs catalytic oxidation catalyst and the obtained catalyst. Background technique [0002] Organic waste gas VOCs (volatile organic compounds) are also called volatile organic compounds, and their components include benzene, toluene, formaldehyde, propylene, phenol, acetone and styrene. It not only destroys the ozone layer and forms environmental pollutants such as photochemical smog and aerosols, but also its toxicity can induce mutations, cause cancer, and seriously affect human health. [0003] VOCs are mainly produced in paint production, spraying, printing, petrochemical, shoe and tanning, tire manufacturing and other industries. [0004] The governance of VOCs mainly includes source reduction, process control and end-point governance. Terminal management is the most widely used and the best way to achieve results. Terminal treatment mainl...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/02B01J37/08B01J35/10B01D53/44B01D53/86
CPCB01J23/8898B01J23/002B01J37/0215B01J37/088B01D53/8687B01J2523/00B01D2257/708B01J35/613B01J35/633B01J35/647B01J2523/24B01J2523/31B01J2523/36B01J2523/55B01J2523/56B01J2523/68B01J2523/72B01J2523/847Y02A50/20
Inventor 蔡鹏鹏李海涛宋喜强张鹏周蒙
Owner 湖南立泰环境工程有限公司
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