Preparation method and application of carbonized silk photocatalyst

A photocatalyst and photocatalytic reaction technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of less active functional groups and low photocatalytic activity, and achieve mild reaction conditions and preparation The process is simple and the effect of reducing safety risks

Active Publication Date: 2019-12-13
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, high-temperature carbonization is directly carried out on silk, because in the high-temperature process, with the occurrence of deoxygenation and dehydrogenation reactions, the generated carbonized materials are dense and have fewer active functional groups, and the photocatalytic activity is low.
At present, there is no public report on the use of silk as a photocatalyst for fuel desulfurization

Method used

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  • Preparation method and application of carbonized silk photocatalyst
  • Preparation method and application of carbonized silk photocatalyst
  • Preparation method and application of carbonized silk photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0049] Rinse the natural cocoon with deionized water 3 times to wash off the impurities on the surface of the cocoon. Then cut the washed silkworm cocoons into an area of ​​about 1cm 2 (1 cm x 1 cm) pieces. Soak 1g flake silk and 0.1g phosphotungstic acid in 100mL deionized water for 24 hours, take out the soaked silk and dry it in a vacuum oven at 40°C for 24 hours. Continue to place the dried silk in a tube furnace, which is fed with argon gas at a flow rate of 5 mL / min. The tube furnace was heated from room temperature to 700 °C at a rate of 5 °C / min, and fired at 700 °C for 4 hours, and naturally cooled to room temperature to obtain carbonized silk activated by phosphotungstic acid. Finally, it was rinsed with distilled water and ethanol three times to remove the residual activator on the surface, and the sample was named LWS-700.

[0050] The characterization and analysis of the catalyst product made in this example, the scanning electron micrograph of the silk carboni...

preparation Embodiment 2

[0052] Rinse the natural cocoon with deionized water 3 times to wash off the impurities on the surface of the cocoon. Then cut the washed silkworm cocoons into an area of ​​about 1cm 2 (1 cm x 1 cm) pieces. Soak 1g flake silk, 0.1g potassium chloride and 0.2g oxalic acid in 100mL deionized water for 18h, take out the soaked silk and dry in a vacuum oven at 40°C for 24h. Continue to place the dried silk in a tube furnace, and argon gas is introduced into the tube furnace, and the flow rate of argon gas is 10 mL / min. The tube furnace was heated from room temperature to 500 °C at a rate of 5 °C / min, and fired at 500 °C for 4 hours, and then naturally cooled to room temperature to obtain carbonized silk co-activated by potassium chloride and oxalic acid. Finally, rinse with distilled water and ethanol 3 times to remove the residual activator on the surface, and the sample is named KCS-500.

[0053] Characterization analysis is carried out to the catalyst product made in this ex...

preparation Embodiment 3

[0055] Rinse the natural cocoon with deionized water 3 times to wash off the impurities on the surface of the cocoon. Then cut the washed silkworm cocoons into an area of ​​about 1cm 2 (1 cm x 1 cm) pieces. Soak 1g of flaky silk and 0.2g of boric acid in 100mL of deionized water for 24 hours, then take out the soaked silk and dry it in a vacuum oven at 40°C for 24 hours. Continue to place the dried silk in a tube furnace, which is fed with argon gas at a flow rate of 5 mL / min. The tube furnace was heated from room temperature to 500 °C at a rate of 5 °C / min, and fired at 500 °C for 4 hours, and naturally cooled to room temperature to obtain carbonized silk activated by boric acid. Finally, rinse with distilled water and ethanol 3 times to remove the residual activator on the surface, and the sample is named PS-500.

[0056] The catalyst product made in this example is characterized and analyzed, and the scanning electron microscope picture of the silk carbonized material (P...

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Abstract

The invention discloses a preparation method and application of a carbonized silk photocatalyst. The carbonized silk photocatalyst is prepared by the following preparation steps: soaking natural silkand an activation agent into water, taking out the soaked silk, performing drying, and roasting the dried silk in the presence of an inert atmosphere. The invention further discloses a photocatalyticdesulfurization method of fuel oil. The photocatalytic desulfurization method comprises the following steps: mixing fuel oil to be desulfurized, an extraction agent and the carbonized silk photocatalyst, by taking air as an oxidant, performing a photocatalysis reaction under lighting, and separating an upper-layer oil phase, so as to obtain desulfurized fuel oil. The catalyst disclosed by the invention is simple in preparation process, and dibenzothiophene sulfides which are hard to remove in fuel oil can be effectively reduced under UV (ultraviolet) light radiation; desulfurization can be achieved in a desulfurization process at the room temperature, and reaction conditions are mild; air is adopted as the oxidant, and no explosive peroxide is used, so that potential security risks can bereduced. The catalyst disclosed by the invention has good application values in fuel oil desulfurization.

Description

technical field [0001] The invention relates to a fuel oil desulfurization catalyst material, in particular to a preparation method and application of a carbonized silk photocatalyst. Background technique [0002] With the popularization of automobiles, the environmental pollution caused by automobile exhaust has seriously affected people's production and life. Therefore, my country has stepped up revisions and proposed higher clean fuel standards. Since 2017, the "National V" fuel standard has been implemented nationwide, stipulating that the maximum sulfur content in fuel shall not exceed 10mg / kg. It started in 2019 and is discussing the implementation of more stringent "National VIA" standards to continuously improve air quality. The current fuel oil desulfurization technology is mainly divided into two categories: hydrodesulfurization technology and non-hydrogenation desulfurization technology. Currently, hydrodesulfurization technology is mostly used in industry, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/06B01J37/08B01J35/06B01J21/18B01J37/28B01J31/18B01J31/02B01J31/04C10G27/04C10G32/04
CPCB01J37/06B01J37/084B01J21/18B01J37/28B01J27/188B01J31/0205B01J31/04C10G27/04C10G32/04C10G2300/202B01J35/58B01J37/0203B01J35/39C10G2300/703
Inventor 曾兴业陈振雄王寒露张战军吴世逵
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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