A kind of catalyst for removing harmful gas and its preparation method and application

A technology for harmful gases and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of high cost, difficult industrial application, poor catalyst removal effect, etc., to improve the effect, preparation Low cost and less catalyst poisoning effect

Active Publication Date: 2021-02-23
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is that the cost of the catalyst used to remove harmful gases in the prior art is too high, the removal effect of the catalyst is not good, and it is difficult to realize large-scale industrial application

Method used

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  • A kind of catalyst for removing harmful gas and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Catalyst 6% CuO-MnO x / HBC

[0038] 6%CuO-MnO x / Preparation of HBC

[0039] The concrete steps of this catalyst material preparation method are as follows:

[0040] (1) Preparation of BC (activated carbon): put the raw material of 80-100 mesh pine cones in a tube furnace, and heat it to 450-500°C at a heating rate of 5-10°C / min under a nitrogen protective gas and stay for 60 minutes ~120min, and then wait for the temperature to drop to room temperature and take it out to obtain pinecone biochar (BC).

[0041] (2) The preparation of HBC, namely the modification of BC: BC is immersed in 30% hydrogen peroxide solution for 15~32 hours (by mass ratio BC:H 2 o 2 =1: (5~15) impregnation), wash with deionized water until the pH value is neutral, then place the temperature in a constant temperature drying oven at about 105°C and dry for 15~20 hours to obtain the pinecone activated by hydrogen peroxide Charcoal (HBC).

[0042] (3) Composite impregnation soluti...

Embodiment 2

[0047] Example 2: Catalyst 8% CuO-MnO x / HBC

[0048] The preparation conditions and preparation method of the catalyst are the same as in Example 1, except that the loading capacity is 8%, wherein 0.79g of copper nitrate is added, 0.73ml of 50% manganese nitrate solution is added, and 24ml of deionized water is added. The catalyst can be expressed as 8 %CuO-MnO x / HBC. The catalyst is characterized in that CuO-MnO x The specific surface area of ​​ / HBC catalyst is 318.20m 2 / g, the total pore volume is 0.15cm 3 / g, the average pore diameter is 1.94nm; The catalyst is composed of the following components in mass percentage:

[0049] CuO actual content 3.7%, MnO 2 The actual content is 4.2%, and the rest is HBC carrier.

Embodiment 3

[0050] Example 3: Catalyst 10% CuO-MnO x / HBC

[0051] The preparation conditions and preparation method of the catalyst are the same as in Example 1, except that the loading capacity is 10%, wherein 0.98g of copper nitrate is added, 0.94ml of 50% manganese nitrate solution is added, and 24ml of deionized water is added, and the catalyst can be expressed as 10 %CuO-MnO x / HBC. Described catalyzer is characterized in that, described catalyzer is made up of the component of following mass percent:

[0052] CuO actual content 4.9%, MnO 2 The actual content is 5.48%, and the rest is HBC carrier.

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Abstract

The invention discloses a catalyst for removing harmful gas and a preparation method and application thereof. The catalyst uses activated carbon as a carrier and metal oxides are carried by the activated carbon. The metal oxides comprise copper oxide and manganese oxide according to a molar ratio of copper oxide to manganese oxide of 3: 1 to 1: 5. The catalyst has stable activity, does not easilycause catalyst poisoning, has good formaldehyde removal and mercury removal performances and can be industrially applied on a large scale. The catalyst is prepared from easily available raw materials.The preparation method is simple and a preparation cost of the catalyst is low.

Description

technical field [0001] The invention relates to a catalyst for removing harmful gases, a preparation method and application thereof, and belongs to the technical field of supported catalysts. Background technique [0002] Formaldehyde (HCHO) is an irritating gas. Human long-term, low-concentration exposure to formaldehyde can cause headaches, dizziness, and decreased immunity. When the concentration of formaldehyde is too high, it can cause acute poisoning, manifested as dyspnea, allergic dermatitis, pulmonary edema, etc. If formaldehyde is discharged into the air for a long time, it will also cause environmental problems such as smog. Mercury is extremely volatile, persistent, easy to migrate and easy to accumulate, which will seriously damage human health and cause ecological environment pollution. Therefore, the control and removal of formaldehyde and mercury have received extensive attention. Separate treatment of formaldehyde and mercury will increase the cost, so ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J35/10B01D53/86B01D53/72B01D53/64
CPCB01D53/8665B01D53/8668B01D2257/602B01J23/002B01J23/8892B01J35/1019B01J35/1038B01J35/1057B01J35/1061
Inventor 李彩亭宜瑶瑶李珊红高磊杜雪雨
Owner HUNAN UNIV
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