Polyphenylene sulfide composite material and preparation method of in-situ supported sulfur-doped graphene denitrification and anti-sulfur catalyst

A technology of sulfur-doped graphene and composite materials, which is applied in the field of sulfur-doped graphene composite catalysts and filter materials, can solve the problems of the end of a difficult flue gas treatment system, a high catalyst activation temperature, and high installation and operation costs, and achieves a reaction The synthesis method and operation are simple, the reaction catalysis temperature is reduced, and the out-of-stock rate is high.

Active Publication Date: 2022-04-19
FUZHOU UNIV
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  • Description
  • Claims
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Problems solved by technology

[0004] The commercialized vanadium-titanium system catalyst has a high activation temperature (>300°C), it is difficult to apply at the end of the flue gas treatment system, and the installation and operation costs are high

Method used

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  • Polyphenylene sulfide composite material and preparation method of in-situ supported sulfur-doped graphene denitrification and anti-sulfur catalyst
  • Polyphenylene sulfide composite material and preparation method of in-situ supported sulfur-doped graphene denitrification and anti-sulfur catalyst
  • Polyphenylene sulfide composite material and preparation method of in-situ supported sulfur-doped graphene denitrification and anti-sulfur catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of S-rGO: 1 g of graphite was added to a 150 mL beaker, 40 mL of concentrated sulfuric acid was added, and it was placed in a water bath and stirred at room temperature until fully dissolved. Add 0.2g of KMnO every 10min 4 , the amount of potassium permanganate added is 5g. KMnO 4 After all the additions were completed, the water temperature was raised to 50° C., and after stirring for 2 hours, the water temperature was raised to 80° C. to continue the reaction for 2 hours, and then 80 ml of deionized water was added. The reaction solution obtained in step (2) was placed in a 90 ° C water bath and stirred for 10 min, and H was added dropwise. 2 O 2 until there are no bubbles. Finally, 20 ml of hydrochloric acid was added, and the obtained product was repeatedly centrifuged until neutral. The product was diluted with 80 ml of deionized water, 0.5 g of m-bromothiophene and 0.3 g of thiophene-3-amine were added, fully dissolved, and then transferred to an ...

Embodiment 2

[0045] Preparation of S-rGO: 1 g of graphite was added to a 150 mL beaker, 40 mL of concentrated sulfuric acid was added, and it was placed in a water bath and stirred at room temperature until fully dissolved. Add 0.2g of KMnO every 10min 4 , the amount of potassium permanganate added is 5g. KMnO 4 After all the additions were completed, the water temperature was raised to 50° C., and after stirring for 2 hours, the water temperature was raised to 80° C. to continue the reaction for 2 hours, and then 80 ml of deionized water was added. The reaction solution obtained in step (2) was placed in a 90 ° C water bath and stirred for 10 min, and H was added dropwise. 2 O 2 until there are no bubbles. Finally, 20 ml of hydrochloric acid was added, and the obtained product was repeatedly centrifuged until neutral. The product was diluted with 80 ml of deionized water, 0.5 g of m-bromothiophene and 0.3 g of thiophene-3-amine were added, fully dissolved, and then transferred to an ...

Embodiment 3

[0050] Preparation of S-rGO: 1 g of graphite was added to a 150 mL beaker, 40 mL of concentrated sulfuric acid was added, and it was placed in a water bath and stirred at room temperature until fully dissolved. Add 0.2g of KMnO every 10min 4 , the amount of potassium permanganate added is 5g. KMnO 4 After all the additions were completed, the water temperature was raised to 50° C., and after stirring for 2 hours, the water temperature was raised to 80° C. to continue the reaction for 2 hours, and then 80 ml of deionized water was added. The reaction solution obtained in step (2) was placed in a 90 ° C water bath and stirred for 10 min, and H was added dropwise. 2 O 2 until there are no bubbles. Finally, 20 ml of hydrochloric acid was added, and the obtained product was repeatedly centrifuged until neutral. The product was diluted with 80 ml of deionized water, 0.5 g of m-bromothiophene and 0.3 g of thiophene-3-amine were added, fully dissolved, and then transferred to an ...

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Abstract

The invention belongs to the technical field of denitrification and antisulfur filter materials, and specifically relates to a preparation method of polyphenylene sulfide denitrification and antisulfur functional filter materials loaded with sulfur-doped graphene in situ. First, the polyphenylene sulfide fiber is treated with nitric acid to make it The surface forms functional groups that can react with sulfur-doped graphene, and then the sulfur-doped graphene is grafted on polyphenylene sulfide fibers. Due to the residual oxygen-containing functional group defects on sulfur-doped graphene and the addition of surfactant Ce 3+ It can react with both, and is firmly bound to the surface of polyphenylene sulfide fiber and sulfur-doped graphene. In addition, the added Pd 2 +It can be well bonded with Ce on the surface of sulfur-doped graphene and sulfide fiber 3+ The oxidation-reduction reaction is carried out, so that a large amount of Ce accumulates on the surface of sulfur-doped graphene and sulfide fibers 3+ , Ce 4+ , Pd 2 + ions. Finally, using potassium permanganate as an oxidant, a redox reaction occurs on the surface of sulfur-doped graphene and polyphenylene sulfide fibers to form Mn-Ce-PdO x Three-way catalyst, the composite filter material is obtained after dehydration in an oven.

Description

technical field [0001] The invention belongs to the technical field of sulfur-doped graphene composite catalyst and filter material, and particularly relates to the preparation of sulfur-doped graphene and functional filter material composite material, and the in-situ growth of a kind of Mn with high-performance denitration and anti-sulfur function on the surface of the composite material. -Ce-PdO x catalyst technology. [0002] technical background [0003] Stationary pollution contains pollutants such as soot, heavy metals, nitrogen oxides and sulfur oxides, which are responsible for environmental and human health problems. Therefore, NO x The selective reduction (SCR) technology and soot emission control of baghouses have been extensively studied by researchers. Among them, polyphenylene sulfide is widely used in the field of bag filter, because it has the following advantages: excellent flame retardant performance, its limiting oxygen index (LOI) is as high as 34%, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/045B01J31/06B01J35/06B01J37/08B01D53/86B01D53/56
CPCB01J31/069B01J27/045B01J35/06B01J37/082B01D53/8628B01D2258/0283
Inventor 郑玉婴周铭玮
Owner FUZHOU UNIV
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