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PPS (Polyphenylene Sulfite) microporous membrane with GO/TiO2 additive and low-temperature denitrification catalytic membrane

A low-temperature denitration and additive technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, membranes, etc., can solve problems such as difficult to solve the service life of catalysts, and improve service life and catalytic performance. , The effect of improving flexibility and uniform aperture

Active Publication Date: 2018-06-29
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the research on low-temperature SCR catalysts continues, it is always difficult to solve the problem of catalyst service life. Therefore, the development of catalysts with low-temperature activity and sulfur-resistant hydrophobicity is the key to improving this technology.

Method used

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  • PPS (Polyphenylene Sulfite) microporous membrane with GO/TiO2 additive and low-temperature denitrification catalytic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) GO / TiO 2 Preparation of additives

[0039] Preparation of GO / TiO by Hydrothermal Method 2 Additives, add 150 mg of graphite oxide to 40 mL of ethanol for ultrasonic dispersion for 2 hours, add 20 mL of hydrochloric acid, 10 mL of deionized water, 0.36 g of ammonium sulfate, 4.3 mL of tetrabutyl titanate, and stir for 3 hours; transfer the resulting mixed solution into a hydrothermal kettle The reaction was carried out at a constant temperature for 24 hours, and the reaction temperature was 180 °C. Then the product was washed with ethanol and deionized water until neutral, and finally dried at 60 °C to obtain GO / TiO. 2 additive.

[0040] (2) With GO / TiO 2 Preparation of Additive PPS Microporous Films

[0041] 6 g of caprolactam, 1.5 g of dibutyl sebacate, 2.4 g of polyphenylene sulfide and 0.1 g of the above GO / TiO 2 Add the additive into a 100mL flask, heat and stir for 20 minutes under the protection of nitrogen, the reaction temperature is 255°C, and after de...

Embodiment 2

[0046] (1) GO / TiO 2 Preparation of additives

[0047] Preparation of GO / TiO by Hydrothermal Method 2 Add 50 mg of graphite oxide into 40 mL of ethanol for ultrasonic dispersion for 2 hours, add 20 mL of hydrochloric acid, 10 mL of deionized water, 0.36 g of ammonium sulfate, 4.3 mL of tetrabutyl titanate, and stir for 3 hours; transfer the resulting mixed solution into a hydrothermal kettle The reaction was carried out at a constant temperature for 24 hours, and the reaction temperature was 180 °C. Then the product was washed with ethanol and deionized water until neutral, and finally dried at 60 °C to obtain GO / TiO. 2 additive.

[0048] (2) With GO / TiO 2 Preparation of Additive PPS Microporous Films

[0049] 5.5g caprolactam, 1.5g dibutyl sebacate, 2.5g polyphenylene sulfide and 0.5g above GO / TiO 2 The additive was added to a 100mL flask, heated and stirred for 20 minutes under the protection of nitrogen, the reaction temperature was 255 ° C, and the film casting solutio...

Embodiment 3

[0054] (1) GO / TiO 2 Preparation of additives

[0055] Preparation of GO / TiO by Hydrothermal Method 2 Additives, add 150 mg of graphite oxide to 40 mL of ethanol for ultrasonic dispersion for 2 hours, add 20 mL of hydrochloric acid, 10 mL of deionized water, 0.36 g of ammonium sulfate, and 4.3 mL of tetrabutyl titanate, and stir for 3 hours; transfer the resulting mixed solution into a hydrothermal kettle The reaction was carried out at a constant temperature for 24 hours, and the reaction temperature was 180 °C. Then the product was washed with ethanol and deionized water until neutral, and finally dried at 60 °C to obtain GO / TiO. 2 additive.

[0056] (2) With GO / TiO 2 Preparation of Additive PPS Microporous Films

[0057] 5 g of caprolactam, 2.2 g of dibutyl sebacate, 2 g of polyphenylene sulfide and 0.8 g of the above GO / TiO 2 The additive was added to a 100mL flask, heated and stirred for 20 minutes under the protection of nitrogen, the reaction temperature was 255 ° C...

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Abstract

The invention provides a PPS (Polyphenylene Sulfite) microporous membrane with a GO / TiO2 additive and a low-temperature denitrification catalytic membrane. The PPS microporous membrane is prepared from the following raw materials in percentage by mass: 10 to 60 weight percent of polyphenylene sulfite, 30 to 80 weight percent of a compound diluting agent and 0.1 to 20 weight percent of the GO / TiO2additive. By adopting the PPS microporous membrane provided by the invention, the poisoning and inactivation problems of an existing low-temperature SCR (Selective Catalytic Reduction) catalyst are improved, and the catalytic membrane with water-resisting and sulfur-resisting functions is prepared. The polyphenylene sulfite membrane has high porosity, high specific surface area, good solvent resistance, environment resistance and hydrophobic property, so that the polyphenylene sulfite membrane can be used for effectively limiting combination of water steam and a catalyst and a high-performancecarrier is provided for the catalyst; a matrix is modified through TiO2-loaded graphene oxide to have good sulfur-resisting performance, so that the multifunctional catalytic membrane which can be used for effectively inhibiting the generation of ammonium sulfate and ammonium hydrogen sulfate on the surface of the catalyst, and furthermore, damages, caused by SO2, to the activity of the catalystare resisted and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic films, in particular to a kind of GO / TiO 2 Additive PPS microporous membrane and low temperature denitration catalytic membrane. Background technique [0002] At present, my country's energy structure is mainly based on coal energy, and the combustion of a large amount of coal will produce nitrogen oxides, mainly including NO, NO 2 , N 2 O, etc., can cause acid rain and acid fog. Combined with hydrocarbons, it can form photochemical smog, destroy the atmospheric ozone layer, and increase the eutrophication of water bodies through the action of dry and wet deposition. At the same time, it will also affect human breathing. system. In recent years, the total amount of NOx emissions in my country is huge and continues to increase. Therefore, it is particularly important to develop safe, green, efficient and stable nitrogen oxide treatment methods. Among them, selective catalytic re...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D71/66B01J31/38B01J35/06B01D53/56B01D53/90
CPCB01D53/8628B01D53/90B01D67/0079B01D69/02B01D71/66B01J31/38B01D2325/38B01D2325/30B01D2325/10B01J35/59Y02P20/30
Inventor 韩娜杨焯王建伟张文昕王卫静韩昌冶
Owner TIANJIN POLYTECHNIC UNIV
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