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Catalyst with rewritable performance and its preparation method and application

A catalyst and writing performance technology, applied in the field of heterogeneous catalysts, can solve problems such as difficulty in changing catalytic performance, and achieve the effects of being beneficial to recycling, increasing stability, and improving catalytic desulfurization efficiency

Active Publication Date: 2020-02-07
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the combination of most catalysts and supports is mostly a static irreversible process, that is, once the catalyst is combined with the support, it will maintain its existing catalytic performance that is difficult to change

Method used

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  • Catalyst with rewritable performance and its preparation method and application
  • Catalyst with rewritable performance and its preparation method and application
  • Catalyst with rewritable performance and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1 Catalyst carrier PIL-rGO with rewritable properties

[0060] The preparation method is as follows:

[0061] 1) Preparation of polymeric ionic liquid 1-vinyl-3-ethylimidazolium bromide Poly[ViBIm]Br(PIL-Br)

[0062] Accurately weigh 20 g of 1-vinyl-3-ethylimidazolium bromide monomer, and add it into a 250 mL round bottom flask, dissolve it with chloroform, add 0.4 g of AIBN, and stir to dissolve. After filling the above system with nitrogen for 30 minutes, under the protection of nitrogen, the reaction was refluxed for 5 hours. After the reaction was completed, it was cooled to room temperature, the product was washed three times with chloroform, and then dried in vacuo to obtain a yellow solid, Poly[ViBIm]Br(PIL-Br).

[0063] 2) load Br - Preparation of catalyst carrier (PIL-rGO) with rewritable performance

[0064] Add 0.1 g of graphene oxide (GO) to a round bottom flask containing 100 mL of deionized water, obtain a black GO dispersion system after ultra...

Embodiment 2

[0065] Example 2 Research on the rewritable performance of PIL-rGO

[0066] Based on the ion exchange property of PIL-Br, this example examines the relationship between different anions and Br in PIL-rGO - The reversible exchange between, that is, the rewritable performance of PIL-rGO.

[0067] 1) Acidic anion [HSO 4 ] - The writing process

[0068] Add 120mL sodium bisulfate saturated aqueous solution to the round bottom flask, weigh 0.1g loaded Br - The catalyst carrier PIL-rGO with rewritable properties was dissolved in a small amount of deionized water, and a black dispersion system was obtained after ultrasonic dispersion. The obtained black dispersion system was transferred to a round bottom flask and reacted for 24 h under magnetic stirring. After the reaction, the product was filtered through a filter membrane, washed three times with water, and freeze-dried to obtain the loaded acidic anion [HSO 4 ] - acidic anion catalyst ([HSO 4 ] - -PIL-rGO).

[0069] 2) ...

Embodiment 3

[0078] Synthesis of PIL-rGO catalysts modified by different heteropolyacid anions in embodiment 3

[0079] (1) [PW 12 o 40 ] 3- - Preparation of PIL-rGO

[0080] Add 120mL of phosphotungstic acid aqueous solution to the round bottom flask, weigh 0.1g of PIL-rGO prepared in Example 1 and dissolve in a small amount of deionized water, and obtain a black dispersion system after ultrasonication. The PIL-rGO dispersion was transferred to a round bottom flask and reacted for 24 h under magnetic stirring. After the reaction, the product was filtered with a filter membrane, washed three times with water, and after freeze-drying, the loaded acidic anion [PW12 o 40 ] 3- The acidic anion catalyst ([PW 12 o 40 ] 3- -PIL-rGO).

[0081] (2) [PMo 12 o 40 ] 3- - Preparation of PIL-rGO

[0082] Add 120 mL of phosphomolybdic acid aqueous solution into the round bottom flask, weigh 0.1 g of PIL-rGO prepared in Example 1, dissolve it in a small amount of deionized water, and obtain a...

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Abstract

The invention relates to catalyst carrier PIL-rGO (poly ionic liquid-reduced graphene oxide) with rewritable performance, a preparation method of the catalyst carrier and an application. The preparation method includes the steps: dissolving an appropriate amount of taken 1-vinyl-3-ethyl imidazole bromide by the aid of chloroform, adding azobisisobutyronitrile, performing refluxing reaction under the protection of nitrogen, and performing cooling, washing and drying to obtain modified poly ionic liquid (PIL-Br) with Br (Bromum) negative ions; ultrasonically dispersing GO (graphene oxide) into water, adjusting a pH (potential of hydrogen) value to be 12, stirring mixture, dropping PIL-Br and hydrazine hydrate, and performing refluxing reaction, filtering, water washing and freeze-drying to obtain PIL-rGO with Br negative ions. According to the method, a novel functional material PIL-rGO with the rewritable performance is firstly designed and synthesized, replacement of different catalytic activity centers on the same catalyst carrier and self-renewing of carriers are achieved by the aid of reversible exchange between the PIL and acid negative ions on the PIL-rGO carriers, the catalytic activity centers are uniformly distributed on the surfaces of the carriers by the aid of a designed catalyst, and the catalytic efficiency of fuel oil desulfurization is effectively improved.

Description

technical field [0001] The invention belongs to the field of heterogeneous catalysts, and in particular relates to a method of implanting the rewritable concept into the design of the catalyst, which can realize the loading and replacement of different types of catalytic active centers on the same catalyst carrier, so that the catalyst can maintain While achieving stability, more flexible dynamic design and controllable adjustment of catalytic reactions can be realized. Background technique [0002] With the rapid development of social economy, the number of vehicles around the world continues to increase, resulting in a substantial increase in fuel demand and consumption. Sulfur-containing compounds in fuel generate sulfur oxides SOx when burned at high temperatures, which is responsible for environmental pollution such as acid rain. main cause of the problem. Therefore, how to reduce the sulfur compounds in fuel oil and fundamentally solve the problems related to environm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J31/02C10G27/00
CPCB01J31/0292C10G27/00C10G2300/202C10G2300/70
Inventor 夏立新张海冉张谦周鹏宇李超琪
Owner LIAONING UNIVERSITY
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