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Gasoline desulfurization adsorbent and preparation method thereof

A technology of adsorbent and gasoline, applied in the field of preparation of desulfurization adsorbent, can solve the problems of easy agglomeration, easy to occur agglomeration, etc., and achieve the effects of preventing agglomeration, improving desulfurization effect, and enhancing adsorption capacity

Active Publication Date: 2013-11-20
江苏纳欧新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the deficiency that graphene is prone to agglomeration during the use process in the prior art, and provides a gasoline desulfurization adsorbent and a preparation method thereof, in which attapulgite single crystal intercalation graphene is used to prevent graphene sheets from stacking each other, To avoid the problem of easy agglomeration of graphene during use

Method used

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  • Gasoline desulfurization adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1), 1g of graphite powder, 0.5g of Cu(NO 3 ) 2 ·3H 2 Add O to 15ml of concentrated sulfuric acid, slowly add 1g of potassium permanganate at -5°C, stir for 1 hour, add 300mL of attapulgite slurry with a concentration of 0.5g / L, ultrasonically disperse for 0.5 hours, add 1mol / L hydrogen Sodium oxide solution to the pH value of the system is 10 to prepare graphene oxide / attapulgite / Cu(OH) 2 / MnO 2 Composite suspension.

[0033] (2) At a temperature of 60°C, add 24.84 mL of an aqueous solution containing formaldehyde with a molar concentration of 0.5 mol / L to the composite dispersion obtained in the previous step while stirring, react for 30 minutes, filter, wash, and dry to obtain graphite ene / attapulgite / Cu 2 O / MnO 2 Composite desulfurization adsorbent.

[0034] The measured sulfur content of the simulated gasoline after adsorption is 12ppm, the desulfurization rate of the adsorbent is 94.92%, and the adsorption capacity is 7.84mg / g.

Embodiment 2

[0036] (1), 1g graphite powder, 3gCu(NO 3 ) 2 ·3H 2 Add O to 25ml of concentrated sulfuric acid, slowly add 3g of potassium permanganate at 0°C, stir for 2 hours, add 125mL of attapulgite slurry with a concentration of 3g / L, ultrasonically disperse for 2 hours, add 5mol / L potassium hydroxide The pH value of the solution to the system is 13, and the graphene oxide / attapulgite / Cu(OH) 2 / MnO 2 Composite suspension.

[0037] (2) At a temperature of 85°C, add 8.28 mL of an aqueous solution of acetaldehyde with a molar concentration of 3 mol / L to the composite dispersion obtained in the previous step while stirring, react for 60 minutes, filter, wash, and dry to obtain graphene / Attapulgite / Cu 2 O / MnO 2 Composite desulfurization adsorbent.

[0038] The sulfur content of simulated gasoline after adsorption was measured to be 32ppm, the desulfurization rate of the adsorbent was 86.44%, and the adsorption capacity was 7.14mg / g.

Embodiment 3

[0040] (1), 1g graphite powder, 1gCu(NO 3 ) 2 ·3H 2O was added to 18ml of concentrated sulfuric acid, 1.8g of potassium permanganate was slowly added at -3°C, stirred for 1 hour and 20 minutes, 300mL of attapulgite slurry with a concentration of 1g / L was added, ultrasonically dispersed for 1 hour, and 2mol / L ammonia solution is 11 to system pH value, makes graphene oxide / attapulgite / Cu(OH) 2 / MnO 2 Composite suspension.

[0041] (2) At a temperature of 68°C, add 9.43 mL of an aqueous solution of glucose with a molar concentration of 1.5 mol / L to the composite dispersion obtained in the previous step while stirring, react for 40 minutes, filter, wash, and dry to obtain graphene / Attapulgite / Cu 2 O / MnO 2 Composite desulfurization adsorbent.

[0042] The measured sulfur content of the simulated gasoline after adsorption is 19ppm, the desulfurization rate of the adsorbent is 91.95%, and the adsorption capacity is 7.60mg / g.

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Abstract

The invention provides a gasoline desulfurization adsorbent and a preparation method thereof, overcoming the defect that graphene in the prior art is easy to agglomerate in the using process. The gasoline desulfurization adsorbent takes attapulgite and graphene as carriers and cuprous oxide and manganese dioxide as active ingredients. The preparation method comprises the following steps of: (1) adding graphite and copper nitrate to concentrated sulfuric acid, then slowly adding potassium permanganate, then adding attapulgite slurry with concentration of 0.5-3g / L, and carrying out ultrasonic dispersion; adding an alkali solution to regulate the pH value, thus preparing composite suspension; and (2) adding a reducing agent solution under the condition of stirring, reacting, filtering, washing and drying, thus preparing the composite desulfurization adsorbent. The gasoline desulfurization adsorbent and the preparation method have the beneficial effects that one-dimensional rod-like attapulgite can be inserted between graphene oxide sheet layers, and attapulgite monocrystals are intercalated into graphene to prevent mutual superimposition of the graphene sheets so as to avoid the problem that graphene is easy to agglomerate in the using process.

Description

technical field [0001] The invention belongs to the field of gasoline desulfurization, and in particular relates to a preparation method of a desulfurization adsorbent with high adsorption capacity for sulfur compounds in gasoline. Background technique [0002] Fuel oil is widely used in transportation and life production. However, the sulfur oxides produced during their use have a great impact on the environment and human health. Many new environmental regulations around the world require lower sulfur levels in fuel oils. The European Union requires gasoline to contain less than 10 ppm of sulfur, and Beijing has similar regulations. [0003] In traditional hydrodesulfurization, some sulfur-containing compounds of aromatic hydrocarbons (such as benzothiophene, dibenzothiophene, 4,6-dimethyldibenzothiophene) are difficult to be removed, in order to obtain lower sulfur content Higher temperature, higher pressure, longer residence time and catalyst with higher activity must ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C10G25/00
Inventor 姚超左士祥王桐刘文杰马建锋魏科年于建民
Owner 江苏纳欧新材料有限公司
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