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Catalyst for catalyzing and oxidizing carbon monoxide at low temperature and preparation method thereof

A technology of carbon monoxide and low-temperature catalysis, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc. It can solve the problem of uneven distribution of active components, limited application fields, and performance Instability and other problems, to achieve the effect of easy implementation, overcoming uneven distribution and long service life

Inactive Publication Date: 2010-11-10
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of such catalysts currently uses a single carrier, and the active components loaded on it are unevenly distributed, resulting in low activity and unstable performance, which limits its application fields.

Method used

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  • Catalyst for catalyzing and oxidizing carbon monoxide at low temperature and preparation method thereof

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Effect test

Embodiment 1

[0034] Embodiment 1, the preparation of carbon monoxide low temperature catalyst

[0035] 1) Accurately take 0.1g chitosan, be dissolved in 20mL mass concentration and be 2% acetic acid solution, be prepared into the chitosan solution that concentration is 0.5%; Then add 2g through the activated carbon of acidifying in above-mentioned chitosan solution , shake at 30° C. for 2 h, filter, and dry at 60° C. to obtain chitosan-modified activated carbon (carrier), wherein the mass ratio of chitosan to activated carbon is 1:20.

[0036] 2) Take Fe 2+ Add 20 mL of the salt solution with a concentration of 6 mg / mL, add 2 g of the above-mentioned activated carbon treated with the chitosan solution, shake and react at 30°C for 8 hours, filter, wash, and dry at 60°C.

[0037] 3) Take Pd 2+Add 2g of the above-mentioned Fe-containing composite material to 10mL of salt solution with a concentration of 1mg / mL, shake and react at 30°C for 8h, filter, wash, dry at 60°C, and place in a desicc...

Embodiment 2

[0039] Embodiment 2, the preparation of carbon monoxide low temperature catalyst

[0040] 1) Accurately take 0.1g chitosan, be dissolved in 20mL mass concentration and be 2% acetic acid solution, be prepared into the chitosan solution that concentration is 0.5%; Then add 2g through the activated carbon of acidifying in above-mentioned chitosan solution , shake at 30° C. for 2 h, filter, and dry at 60° C. to obtain chitosan-modified activated carbon (carrier), wherein the mass ratio of chitosan to activated carbon is 1:20.

[0041] 2) Take Fe 2+ To 10 mL of salt solution with a concentration of 6 mg / mL, add 2 g of the above-mentioned activated carbon treated with chitosan solution, shake and react at 30°C for 8 hours, filter, wash, and dry at 60°C.

[0042] 3) Take Pd 2+ Add 2g of the above-mentioned Fe-containing composite material to 20mL of salt solution with a concentration of 1mg / mL, shake and react at 30°C for 8h, filter, wash, dry at 60°C, and place in a desiccator for...

Embodiment 3

[0044] Embodiment 3, the preparation of carbon monoxide low temperature catalyst

[0045] 1) Accurately take 0.1g chitosan, be dissolved in 20mL mass concentration and be 2% acetic acid solution, be prepared into the chitosan solution that concentration is 0.5%; Then add 2g through the activated carbon of acidifying in above-mentioned chitosan solution , shake at 30° C. for 2 h, filter, and dry at 60° C. to obtain chitosan-modified activated carbon (carrier), wherein the mass ratio of chitosan to activated carbon is 1:20.

[0046] 2) Take Fe 2+ Add 20 mL of the salt solution with a concentration of 6 mg / mL, add 2 g of the above-mentioned activated carbon treated with the chitosan solution, shake and react at 30°C for 8 hours, filter, wash, and dry at 60°C.

[0047] 3) Then take Pd 2+ Add 2g of the above-mentioned Fe-containing composite material to 20mL of salt solution with a concentration of 1mg / mL, shake and react at 30°C for 8h, filter, wash, dry at 60°C, and place in a ...

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Abstract

The invention discloses a catalyst for catalyzing and oxidizing carbon monoxide at low temperature and a preparation method thereof. The catalyst comprises an active component Pd, additive Fe and a carrier, wherein the carrier is active carbon modified from chitosan; and the active component Pd and the additive Fe are loaded on the carrier. In the catalyst, the mass of the active component Pd is 0.5 to 3 percent of that of the carrier, and the mass of the additive Fe is 3 to 24 percent of that of the carrier. The preparation method of the catalyst comprises the following steps: adopting a step impregnation method, acidizing the active carbon, treating the acidized active carbon with chitosan solution, then sequentially soaking and absorbing the additive Fe and the active component Pd, filtering, washing and drying to obtain the catalyst. The catalyst is characterized by low precious metal content, high activity at low temperature, good moisture resistance property and the like.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a catalyst for eliminating carbon monoxide at low temperature and a preparation method thereof. Background technique [0002] Carbon monoxide is a typical flammable, explosive and toxic compound, and it is the primary pollutant in the air of many industrial environments and indoor environments. The binding capacity of carbon monoxide with human hemoglobin is 250 times that of oxygen, so it can prevent hemoglobin from transporting absorbed oxygen to human tissues. When the content of carbon monoxide in the air exceeds 30mg / m 3 will be toxic to the human body. Therefore, it is of great practical significance to realize the elimination of carbon monoxide under low temperature conditions. In addition, the low-temperature elimination of carbon monoxide also has a wide range of applications, such as: ① the elimination of trace carbon monoxide in manned closed systems, such as aircraft, subm...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/02B01D53/86B01D53/62
CPCY02A50/20
Inventor 孙君社苗翠玲张秀清刘萍刘莉张京声胡锦蓉
Owner CHINA AGRI UNIV
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