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Lignin modified filter material loading denitration and sulfur-resistant catalyst with double-layer core-shell structure and preparation method of lignin modified filter material

A core-shell structure and catalyst technology, applied in the field of functional composite filter materials, can solve problems such as non-renewable regeneration effect, and achieve the effects of good sulfur resistance, simple reaction synthesis method and operation, and simple use.

Active Publication Date: 2018-02-16
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the first deactivation can be regenerated by washing or high temperature treatment; the second deactivation is generally not regenerated or the regeneration effect is poor

Method used

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  • Lignin modified filter material loading denitration and sulfur-resistant catalyst with double-layer core-shell structure and preparation method of lignin modified filter material
  • Lignin modified filter material loading denitration and sulfur-resistant catalyst with double-layer core-shell structure and preparation method of lignin modified filter material
  • Lignin modified filter material loading denitration and sulfur-resistant catalyst with double-layer core-shell structure and preparation method of lignin modified filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a lignin-modified filter material loaded with a double-layer core-shell structure denitrification and anti-sulfur catalyst, the specific steps are:

[0029] 1) Preparation of double-layer core-shell structure denitrification and anti-sulfur catalyst: Weigh 0.5g dry polystyrene microspheres, dilute with 50mL distilled water and ultrasonicate for 1h to form a homogeneous system, weigh 0.0136g sodium dodecyl sulfate and add the above system, sonicate for 1h, weigh 0.412g of cerium nitrate into the above solution, and sonicate for 1h. Weigh 0.15g of potassium permanganate and dissolve it in 50ml of deionized water, and slowly add it to the above solution. 80 degrees Celsius water bath for 3h, centrifugal drying to obtain the core-shell structure Mn-Ce-O X catalyst. Weigh 0.2g of ammonium metavanadate hydrate, dissolve in 4mL of 25-28% ammonia water, then add 40mL of distilled water, stir to dissolve. The dried 0.3g core-shell structure Mn-Ce-O X A...

Embodiment 2

[0037] A method for preparing a lignin-modified filter material loaded with a double-layer core-shell structure denitrification and anti-sulfur catalyst, the specific steps are:

[0038] 1) The preparation of the double-layer core-shell structure denitrification and anti-sulfur catalyst is the same as in Example 1.

[0039] 2) Preparation of functional filter material loaded with double-layer core-shell structure denitrification and anti-sulfur catalyst:

[0040] (1) Add 0.1g of lignin to 50mL of deionized water and stir to dissolve to form a lignin solution; add 0.6g of polyphenylene sulfide filter material to the obtained lignin solution, and ultrasonically treat it for 2 hours to make lignin pass through the π- The mechanism of π-conjugation fully covers the surface of the filter fiber;

[0041] (2) Add 0.2 g of the above prepared hollow structure denitrification and anti-sulfur catalyst into a small beaker with ethanol and ultrasonically dissolve it to make a suspension; ...

Embodiment 3

[0046] A method for preparing a lignin-modified filter material loaded with a double-layer core-shell structure denitrification and anti-sulfur catalyst, the specific steps are:

[0047] 1) The preparation of the double-layer core-shell structure denitrification and anti-sulfur catalyst is the same as in Example 1.

[0048] 2) Preparation of functional filter material loaded with double-layer core-shell structure denitrification and anti-sulfur catalyst:

[0049] (1) Add 0.1g of lignin to 50mL of deionized water and stir to dissolve to form a lignin solution; add 0.6g of polyphenylene sulfide filter material to the obtained lignin solution, and ultrasonically treat it for 2 hours to make lignin pass through the π- The mechanism of π-conjugation fully covers the surface of the filter fiber;

[0050] (2) Add 0.2 g of the above prepared hollow structure denitrification and anti-sulfur catalyst into a small beaker with ethanol and ultrasonically dissolve it to make a suspension; ...

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Abstract

The invention discloses a lignin modified filter material loading a denitration and sulfur-resistant catalyst with a double-layer core-shell structure and a preparation method of the lignin modified filter material. According to the preparation method, a PPS filter material is modified by virtue of lignin, and the lignin is formed by mutually connecting three phenylpropane units through ether bonds and carbon-carbon bonds, has a three-dimensional network structure and can be firmly adsorbed to the surface of the PPS filter material through a benzene ring conjugate effect. The molecular structure of the lignin contains multiple active groups of alcoholic hydroxyl groups, phenolic hydroxyl groups, carbon-base conjugated double bonds and the like, so that the surface activity of the filter material is substantially improved. The denitration and sulfur-resistant catalyst with the double-layer core-shell structure is loaded to the surface of the modified filter material by virtue of an electrostatic incorporation effect of the lignin, so as to form the lignin modified filter material loading the denitration and sulfur-resistant catalyst with the double-layer core-shell structure. Testsshow that the composite filter material modified by the lignin has relatively high denitration activity and very excellent sulfur resistant.

Description

technical field [0001] The invention belongs to the technical field of functional composite filter materials, and in particular relates to a functional filter material loaded with a double-layer core-shell structure denitrification and anti-sulfur catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) includes compounds such as nitric oxide, nitrous oxide, nitrogen dioxide, dinitrogen trioxide, dinitrogen tetroxide and dinitrogen pentoxide, etc. These several gas mixtures are often called gunpowder. NO in the air x It has serious harm to human health and ecological environment. NO is a colorless and odorless gas. It has a strong ability to combine with oxygen in hemoglobin, which will seriously affect the oxygen transport capacity of the blood and stimulate human eyes and respiratory organs. In severe cases, it will induce cell cancer. Exhausted into the atmosphere, it is very easy to react with oxygen to produce NO 2 . Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/56B01J23/34
CPCB01D53/8628B01D53/90B01J23/34B01J35/50
Inventor 郑玉婴朱建风
Owner FUZHOU UNIV
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