Preparation method of catalyst for catalytic oxidation of ammonia (NH3)

A catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of complicated preparation process, high cost, high conversion temperature, etc. Achieve the effect of low price, outstanding low temperature activity, and high N2 selectivity

Inactive Publication Date: 2015-03-11
KUNMING UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN101966451A discloses a selective catalytic oxidation of NH 3 The preparation method and application of the nano-cerium-zirconium solid solution-based catalyst, the carrier of the catalyst prepared by the method is a cerium-zirconium solid solution, the active components are copper, silver, manganese, iron, etc., the carrier is prepared by cationic surfactant method, and the active components are passed through Deposition-precipitation method or impregnation method loaded on cerium-zirconium solid solution, the catalyst has better oxidation activity, NH 3 The conversion rate is 100% at 280°C, but the conversion temperature is high, the preparation process is complicated, and the active component contains precious metals, so the cost is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of catalyst for catalytic oxidation of ammonia (NH3)
  • Preparation method of catalyst for catalytic oxidation of ammonia (NH3)
  • Preparation method of catalyst for catalytic oxidation of ammonia (NH3)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Catalytic oxidation of NH described in this example 3 The preparation method of catalyst, comprises the steps:

[0022] (1) will be loaded with 5 grams of nano-TiO 2 Put the powdered quartz tube 9 in the tube furnace 8, put the Erlenmeyer flask 2 filled with absolute ethanol into the water bath 1, set the temperature of the water bath to 70°C, open the valve III 6, and feed in N 2 , N 2 The flow rate is 300mL / min, ventilate for 20min, start the tube furnace 8, when the temperature reaches 600°C, open the valve II4 and close the valve I3, at this time, N 2 Continuously bring anhydrous ethanol vapor into the reaction area, after 20 minutes of reaction, close Ⅱ4, open valve Ⅰ3, N 2 The atmosphere dropped to room temperature, closed the valve III 6, and took out the product. The obtained product was placed in a beaker filled with 150 mL of concentrated nitric acid with a mass fraction of 80%, and stirred for 5-10 min. Ultrasonic treatment for 60 minutes, suction filtrat...

Embodiment 2

[0030] Catalytic oxidation of NH described in this example 3 The preparation method of catalyst, comprises the steps:

[0031] (1) will be loaded with 5 grams of nano-TiO 2 Put the powdered quartz tube 9 in the tube furnace 8, put the Erlenmeyer flask 2 filled with absolute ethanol into the water bath 1, set the temperature of the water bath to 80°C, open the valve III 6, and feed in N 2 , N 2 The flow rate is 300mL / min, ventilate for 60min, start the tube furnace 8, when the temperature reaches 500°C, open the valve II4 and close the valve I3, at this time, N 2 Continuously bring anhydrous ethanol vapor into the reaction area, after 90 minutes of reaction, close Ⅱ4, open valve Ⅰ3, N 2 The atmosphere dropped to room temperature, closed the valve III 6, took out the product, placed the obtained product in a beaker filled with 150mL of concentrated nitric acid with a mass fraction of 72%, stirred for 10min, and then ultrasonicated under the condition of ultrasonic power of 28...

Embodiment 3

[0039] Catalytic oxidation of NH described in this example 3 The preparation method of catalyst, comprises the steps:

[0040] (1) will be loaded with 5 grams of nano-TiO 2 Put the powdered quartz tube 9 in the tube furnace 8, put the Erlenmeyer flask 2 filled with absolute ethanol into the water bath 1, set the temperature of the water bath to 75°C, open the valve III 6, and feed in N 2 , N 2 The flow rate is 150mL / min, ventilate for 30min, start the tube furnace 8, when the temperature reaches 550°C, open the valve II4 and close the valve I3, at this time, N 2 Continuously bring anhydrous ethanol vapor into the reaction area, after 45 minutes of reaction, close Ⅱ4, open valve Ⅰ3, N 2 The atmosphere dropped to room temperature, closed the valve III 6, took out the product, placed the obtained product in a beaker filled with 150mL of concentrated nitric acid with a mass fraction of 80%, stirred for 7min, and then ultrasonicated under the condition of ultrasonic power of 45H...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of a catalyst for catalytic oxidation of ammonia (NH3), and belongs to the technical field of environmentally friendly catalysts; a titanium dioxide and carbon (TiO2-C) nano composite carrier is prepared by using a chemical vapor deposition method, active components are transition metal copper and cobalt, the active components are loaded onto the TiO2-C nano composite carrier through an ultrasonic immersion method, raw materials used in the preparation method are non-toxic, harmless, and low in price, the catalyst has good low-temperature catalytic activity, stability and product selectivity, the catalyst prepared by using the method can effectively realize low-temperature selective catalytic oxidation of the NH3, catalytic products are N2 and H2O, no secondary pollution is caused, and the catalyst can be widely used in treatment of NH3 containing waste gases produced in industry, agriculture, construction and other processes.

Description

technical field [0001] The invention relates to a catalytic oxidation of NH 3 The preparation method of the catalyst belongs to the field of environment-friendly catalytic technology. Background technique [0002] With the improvement of the quality of life, people's environmental comfort and their own health awareness have been greatly improved. Stench is one of the seven major public hazards recognized in the world. my country's "Air Pollution Prevention Law" and GB 14554-1993 Odor Pollutant Emission Standards for NH 3 Regulations on limited discharge have been made (standard value of odor pollution factory boundary discharge: NH 3 The primary, secondary, and tertiary emission standard values ​​are 1.0 mg / m3 3 , 1.5 mg / m 3 , 4.0 mg / m 3 ); my country's "Industrial Enterprise Design Hygienic Standard" (TJ36-79) stipulates the maximum allowable concentration of harmful substances in the atmosphere of residential areas, NH 3 The primary value is 0.20 mg / m 3 ;NH 3 The st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01D53/86B01D53/58
Inventor 唐晓龙胡景丽易红宏李凯徐先莽王盼赖瑞云
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products