High-adsorption-capacity room-temperature nitrogen oxide adsorbent and preparation method thereof

A technology of nitrogen oxides and high adsorption, which is applied in the field of NOx adsorbent and its preparation, loaded activated carbon adsorbent and its preparation, can solve the problems of small adsorbent capacity and weak adsorption force, etc., and achieve the effect of broad application prospect

Active Publication Date: 2010-11-10
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Because activated carbon has a high specific surface area and rich pore structure, and is cheap, the use of activated carbon to prepare adsorbents can reduce the cost of adsorbents to a large extent, but there are still problems such as small ca

Method used

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  • High-adsorption-capacity room-temperature nitrogen oxide adsorbent and preparation method thereof

Examples

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Example Embodiment

[0025] [Example 1]

[0026] Add 100g coconut shell activated carbon to 1000mL 2M nitric acid aqueous solution, shake and soak for 48h at room temperature, filter out the activated carbon after soaking, wash with deionized water several times, dry in 120℃ air and 400 in air ℃ roasting 4h; 40g zirconium oxychloride (ZrOCl 2 ·8H 2 O) and 16g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) Dissolve in deionized water and prepare 120mL solution, add the above activated carbon at room temperature, dry the activated carbon at 120℃ after immersing for 4h; dissolve 12g potassium hydroxide in 120mL deionized water, add the above activated carbon at room temperature, soak After 4 hours, the activated carbon was dried at 120°C and calcined in nitrogen at 300°C for 4 hours to obtain adsorbent 1. The adsorption capacity for NO is shown in Table 1.

Example Embodiment

[0027] [Example 2]

[0028] Add 100g of coconut shell activated carbon to 1000mL of 2M nitric acid and 20g of hydrogen peroxide in an aqueous solution, shake and immerse for 48h at room temperature, filter out the activated carbon after immersion, and wash it with deionized water for several times, in the air at 120℃ Drying and roasting in the air at 400℃ for 4h; 40g zirconium oxychloride (ZrOCl 2 ·8H 2 O), 16g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and 7g gadolinium nitrate (Gd(NO 3 ) 3 .6H 2 O) Dissolve in deionized water and prepare 120mL solution, add the above activated carbon at room temperature, dry the activated carbon at 120℃ after immersing for 4h; dissolve 12g potassium hydroxide in 120mL deionized water, add the above activated carbon at room temperature, soak After 4 hours, the activated carbon was dried at 120°C and calcined at 300°C in nitrogen for 4 hours to obtain adsorbent 2. The adsorption capacity for NO is shown in Table 1.

Example Embodiment

[0029] [Example 3]

[0030] Use 22g manganese nitrate (50%Mn(NO 3 ) 2 Aqueous solution) instead of 16g ​​copper nitrate in [Example 2], and other conditions are the same as [Example 2] to obtain adsorbent 3. The adsorption capacity for NO is shown in Table 1.

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Abstract

The invention discloses a high-adsorption-capacity room-temperature nitrogen oxide adsorbent and a preparation method thereof. The room-temperature nitrogen oxide adsorbent comprises activated carbon and metal oxides loaded on the activated carbon, wherein the activated carbon is selected from one or more of coconut shell carbon, nutshell carbon, wooden carbon, or coal carbon charcoal, and after the pretreatment of oxidizers formed by nitric acid and other liquid acids and hydrogen peroxide, the activated carbon is loaded with two or more oxides of zirconia, copper oxide, gadolinium oxide, manganese oxide and potassium oxide. The high-adsorption-capacity room-temperature nitrogen oxide adsorbent is an adsorbing material capable of oxidizing NO into NO2 at low temperature and absorbing, and after the adsorption of nitrogen oxide achieves saturation, the nitrogen oxide is pumped into an inert atmosphere or a reducing atmosphere, and the adsorbed nitrogen oxide and the reduced N2 are released after heating; and the adsorbent after regeneration treatment can be reused. Accordingly, the high-adsorption-capacity room-temperature nitrogen oxide adsorbent of the invention can be applied to the purification of nitrogen oxides in closed or semi-closed systems such as highway tunnels, underground car parks and the like, and has broad application prospect.

Description

1. Technical field [0001] The invention relates to a low-concentration nitrogen oxide (NOx, including NO and NO 2 ) NOx adsorbent in exhaust gas and its preparation technology, in particular to a loaded activated carbon adsorbent capable of high-capacity adsorption of NOx at normal temperature and with catalytic function and its preparation technology, belonging to the technical field of environmental protection. 2. Background technology [0002] Today, with the combustion of fossil fuels such as coal and oil, a large amount of nitrogen oxides are emitted into the atmosphere, causing serious pollution of the atmospheric environment and causing serious harm to the natural environment and human life. With the substantial increase in the number of automobiles in our country, the pollution of NOx emitted from automobile exhaust to the atmosphere is also increasing. The photochemical reaction of nitrogen oxides will cause serious damage to the ozone layer, making the ultraviolet...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/32B01J20/34B01D53/04
Inventor 卢冠忠冯柄楠郭耘张志刚郭杨龙王艳芹王筠松龚学庆
Owner EAST CHINA UNIV OF SCI & TECH
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