Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of NiO-CoMn2O4 catalyst and application of NiO-CoMn2O4 catalyst in catalytic oxidative degradation of toluene

A technology of catalyst and sol-gel method, which is applied in the application field of catalytic oxidation degradation of toluene, can solve the problem of not giving CO2 selectivity, and achieve the effect of superior CO2 selectivity and superior catalytic oxidation activity

Active Publication Date: 2021-10-26
CHANGZHOU UNIV
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, what the patent shows is that the conversion rate of toluene is 99%, but not all toluene is converted into the final product CO 2 , i.e. no CO is given 2 selectivity

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 NiO-CoMn2O4 catalyst and application of NiO-CoMn2O4 catalyst in catalytic oxidative degradation of toluene
  • Preparation method of NiO-CoMn2O4 catalyst and application of NiO-CoMn2O4 catalyst in catalytic oxidative degradation of toluene
  • Preparation method of NiO-CoMn2O4 catalyst and application of NiO-CoMn2O4 catalyst in catalytic oxidative degradation of toluene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1)CoMn 2 o 4 Preparation of spinel

[0019] Weigh 0.5 mol of cobalt acetate and 1 mol of manganese acetate, dissolve them in 50 mL of distilled water, stir on a magnetic stirrer at a constant temperature of 80 ° C, add 10 mL of oxalic acid solution, and finally vacuum-dry and bake in a muffle furnace at 400 ° C for 3 hours.

[0020] (2) NiO-CoMn 2 o 4 Catalyst preparation

[0021] Weigh 0.001mol of nickel acid and configure it into a solution with a concentration of 0.2mol / L, according to nickel nitrate: CoMn 2 o 4 Spinel = 1:1 molar ratio, adding the CoMn that has been successfully prepared above 2 o 4 Spinel, stirred for 4 hours, impregnated at room temperature for two days, finally vacuum-dried and placed in a muffle furnace at 400 ° C for 3 hours to obtain a composite metal oxide, recorded as NiO-CoMn 2 o 4 .

Embodiment 2

[0023] (1)CoMn 2 o 4 The preparation of spinel is the same as in Example 1.

[0024] (2) NiO-CoMn 2 o 4 -2 Preparation of catalyst

[0025] Weigh 0.001mol nickel nitrate, configure it into a solution with a concentration of 0.2mol / L, add CoMn 2 o 4 The molar ratio of the amount of spinel to nickel nitrate is 1:1.2, stirred for 4 hours, impregnated at room temperature for two days, finally vacuum-dried and placed in a muffle furnace at 400°C for 3 hours to obtain a composite metal oxide, Denoted as NiO-CoMn 2 o 4 -2.

Embodiment 3

[0027] (1)CoMn 2 o 4 The preparation of spinel is with embodiment 1

[0028] (2) NiO-CoMn 2 o 4 -3 Preparation of catalyst

[0029] Weigh 0.001mol nickel nitrate, configure it into a solution with a concentration of 0.2mol / L, add CoMn 2 o 4 The molar ratio of the amount of spinel to nickel nitrate is 1:1.5, stirred for 4 hours, impregnated at room temperature for two days, and finally vacuum-dried and placed in a muffle furnace for 3 hours at 400°C to obtain a composite metal oxide. Denoted as NiO-CoMn 2 o 4 -3.

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 belongs to the field of catalytic degradation of volatile organic compounds, and particularly provides a preparation method of a NiO-CoMn2O4 catalyst and application of the NiO-CoMn2O4 catalyst in catalytic oxidative degradation of toluene. The NiO-CoMn2O4 catalyst is synthesized by adopting a two-step method, the Mn<4+> and Co<3+> contents and lattice oxygen quantity of NiO modified NiO-CoMn2O4 are obviously improved, the Mn<4+> and Co<3+> contents and the lattice oxygen quantity play a leading role in a catalytic oxidation process and show the optimal catalytic activity on toluene, and a toluene catalytic oxidation performance test shows that the catalyst prepared by the method provided by the invention realizes low-temperature effective degradation of toluene, can realize complete degradation of toluene at 190 DEG C, and has CO2 selectivity of more than 95%.

Description

technical field [0001] The invention belongs to the field of catalytic degradation of volatile organic compounds, and a NiO-CoMn 2 o 4 The preparation method of the catalyst and its application in catalytic oxidation degradation of toluene. Background technique [0002] With the intensification of environmental pollution, especially the emission of volatile organic compounds (VOCs) from various sources, in order to maintain a clean air environment, emission reduction technologies are urgently needed. As one of the most effective methods and strategies, catalytic oxidation has attracted extensive attention. Transition metal oxides are potential alternative catalysts due to their low cost and good activity. In addition, the researchers found that the spinel-type catalysts exhibited higher stability during catalytic oxidation compared with mixed metal oxides and perovskites. In spinel (AB 2 o 4 ), the metals A and B are in the tetrahedral and octahedral positions, and the...

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 Applications(China)
IPC IPC(8): B01J23/889B01J37/08B01J37/02B01J37/03B01D53/72B01D53/86
CPCB01J23/8892B01J23/005B01J37/082B01J37/0201B01J37/036B01D53/8668B01J2523/00B01D2257/7027B01D2258/06B01D2257/708B01J2523/72B01J2523/845B01J2523/847Y02A50/20
Inventor 罗士平祁松亚谢爱娟李书宇陈家艳张宝樱何泓雨张立东郑智元周婷
Owner CHANGZHOU UNIV