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Low-concentration nitrogen oxide adsorbent and preparation method thereof

A nitrogen oxide and adsorbent technology, which is applied in the field of low-concentration nitrogen oxide adsorbent and its corresponding preparation to achieve the effect of stabilizing NOx adsorption performance and high adsorption performance

Inactive Publication Date: 2010-06-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in this regard at home and abroad, especially the honeycomb carbon and honeycomb ceramics are made of monolithic adsorbent materials for low-concentration nitrogen oxides (NO x ) adsorption research, there is no such report

Method used

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  • Low-concentration nitrogen oxide adsorbent and preparation method thereof
  • Low-concentration nitrogen oxide adsorbent and preparation method thereof
  • Low-concentration nitrogen oxide adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Al will be used as the material of the adsorbent transition layer at normal temperature and pressure 2 o 3 (Specific surface area: 250~300m 2 / g) and mesoporous (Zr.Ce)O 2 Solid solution (specific surface area: 220~300m 2 / g) mixed with water at a ratio of 1:5, formed a suspension with a solid content of 40% with water, and ball milled the suspension with grinding balls at a ratio of 2.5:1 for 12 hours (450 rpm) To form a highly dispersed transition layer suspension; the corresponding cerium nitrate, ruthenium chloride, manganese nitrate, copper nitrate, calcium nitrate, and barium acetate corresponding to the metal oxide adsorption active ingredient are in a ratio of 3:0.2:2:1:2: 2. Mixing, also forming a suspension with a solid content of 40% with water, and ball milling with grinding balls at a ratio of 2.5:1 for 12 hours (450 rpm) to form a highly dispersed metal salt suspension. Use 100-mesh honeycomb carbon as the adsorbent carrier, fully impregnate the transi...

Embodiment 2

[0038] The type and operation of the experimental raw materials used are the same as in Example 1, but the heat treatment temperature is 380 ° C for 2 hours to prepare the honeycomb carbon carrier NO x Integral adsorbent, the XRD pattern of gained adsorbent is as follows figure 2 Shown in b.

Embodiment 3

[0040] The types of experimental raw materials used and the operation are the same as in Example 1, but the ball milling time is 4h to prepare NO x Adsorbent, the resulting adsorbent for NO x Adsorption properties such as image 3 As shown in middle b, the adsorption efficiency of NO is 77% / each adsorbent (125cm 3 ).

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Abstract

The invention provides a low-concentration nitrogen oxide adsorbent and a preparation method thereof, which belongs to the field of environmental protection. In the invention, blocky honeycomb carbon or honeycomb ceramic is used as a carrier material, one or more in Al2O3, a (Zr, Ce)O2 solid solution and / or TiO2 is / are used a carrier surface transition layer, and one or more or the composition of more metal oxides in cerium oxide, ruthenium oxide, manganese oxide / copper oxide is used as an adsorption active material. The low-concentration nitrogen oxide adsorbent can effectively adsorb multiple ppm grades of low-concentration NOx (NO, NO2 and the like) gas containing a large amount of water.

Description

technical field [0001] The invention provides a low-concentration nitrogen oxide adsorbent and a corresponding preparation method thereof, and the content of the invention belongs to the field of environmental protection. Background technique [0002] NO x It is the general term for nitrogen oxides, in which the binding ability of NO and hemoglobin in the blood is stronger than that of CO, and it is easy to cause people to be poisoned and die. 2 It is a brown poisonous gas with a special irritating odor, which can damage human eyes and lungs. It is the main cause of acid rain, climate change, and smog, and it has become a public nuisance of automobile exhaust emissions. Although low concentrations (10 -5 ~10 -6 ) of nitrogen oxides, but long-term accumulation in the air will also cause great harm to human health. For example, a car tunnel is a building facility that facilitates human traffic, and it is also an important strategy to alleviate traffic transportation. Howev...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/28B01J20/32B01J35/04B01J32/00B01J23/90B01J37/025B01D53/86B01D53/94B01D53/56
Inventor 崔香枝陈航榕施剑林叶争青
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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