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Supported catalyst for catalytic oxidation desulfurization reaction and preparation method of supported catalyst

A supported catalyst, catalytic oxidation desulfurization technology, applied in the chemical field, can solve the problems of less recycling cycles, large removal rate drop, poor catalytic performance, etc., and achieve the effects of low preparation cost, reduced dosage, and easy recycling

Inactive Publication Date: 2019-04-26
SHIHEZI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves upon existing methods used for reducing pollution from exhaust gases emitted during combustion processes such as those associated with diesel engines or gas turbines. It involves supporting platinum-based catalysis onto supports made up of materials like zeolite (zirconium silicate) or activated carbon. These modifications enhance their effectiveness at removing harmful chemicals while also making them easier to recover after use. Overall, this new technical solution allows better control over engine operation without compromising environmental safety concerns.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency at removing harmful substances from crude oils while minimizing environmental impact due to emissions control measures like NOX reduction standards being set lowered globally. Current methods involve adding chemical agents that increase acid gas levels, leading to increased equipment maintenance expenses and potential health hazards associated with these treatments. There is an urgent need for improved technologies to reduce nitrosated species without compromising its benefits over current options.

Method used

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  • Supported catalyst for catalytic oxidation desulfurization reaction and preparation method of supported catalyst
  • Supported catalyst for catalytic oxidation desulfurization reaction and preparation method of supported catalyst
  • Supported catalyst for catalytic oxidation desulfurization reaction and preparation method of supported catalyst

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preparation example Construction

[0032] A preparation method of a supported catalyst for catalytic oxidation desulfurization reaction of the present invention comprises the following steps:

[0033] (1) Preparation of modified carrier:

[0034] Completely dissolve the metal salt in an excess acid solution, adjust the pH with lye, age, wash, dry, grind, and calcinate to obtain a modified carrier;

[0035] (2) Prepare supported catalyst:

[0036] After completely dissolving the modified carrier in water, a carrier solution is obtained;

[0037] The heteropolyacid is added into the carrier solution, impregnated and dried to obtain the supported catalyst.

[0038] Wherein, the metal salt includes at least one of ferric chloride, magnesium chloride hexahydrate, tin chloride pentahydrate, cobalt chloride hexahydrate, zirconium oxychloride octahydrate, zinc chloride, magnesium nitrate hexahydrate and iron nitrate nonahydrate. two kinds. Thus, the prepared modified carrier is at least two kinds of gas-phase magne...

Embodiment 1

[0048] The specific operation steps are as follows:

[0049] (1) Preparation of modified carrier:

[0050] 0.03mol of zirconium oxychloride octahydrate and 0.01mol of tin tetrachloride pentahydrate are respectively dissolved in the hydrochloric acid solution of 30ml, under stirring condition, tin chloride solution is dripped in the aqueous solution of zirconium chloride, makes it well mixed;

[0051] At room temperature, the pH of the solution was adjusted by ammonia solution, the solution appeared turbid, adjusted to pH 8, aged at 40°C for 2.5h, filtered, washed, and dried for 14h to obtain a solid, which was ground and placed in a muffle furnace Calcined for 3 hours, the temperature was kept at 500° C., and cooled to room temperature to obtain a modified carrier.

[0052] The modified carrier includes zirconia, stannous oxide and tin oxide.

[0053] (2) Prepare supported catalyst:

[0054] Dissolve 0.2g of phosphotungstic acid in 10ml of water, sonicate for 3min until th...

Embodiment 2

[0069] The specific operation steps are as follows:

[0070] (1) Preparation of modified carrier:

[0071] 0.3mol magnesium nitrate hexahydrate (MgNO 3 ) 2 ·6H 2 O and 0.1mol tin tetrachloride pentahydrate (SnCl 4 ·5H 2 0) be dissolved in the hydrochloric acid solution of 300ml respectively, under stirring condition, the magnesium nitrate aqueous solution is dripped in the tin chloride solution, obtains uniform solution;

[0072] At room temperature, adjust the pH to 9 with an ammonia solution, age at 50°C for 3h, filter, wash, and dry for 12h to obtain a solid, which is ground and calcined in a muffle furnace for 6h at a temperature of 500°C , cooled to room temperature and ground the sample to obtain the modified support.

[0073] The modified carrier includes magnesium oxide, stannous oxide and tin oxide, and the specific surface area is 50m 2 / g.

[0074] (2) Prepare supported catalyst:

[0075] 1.6 g of the modified carrier was completely dissolved in 20 ml of wa...

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Abstract

The invention discloses a supported catalyst for catalytic oxidation desulfurization reaction and a preparation method of the supported catalyst. The preparation method of the supported catalyst for catalytic oxidation desulfurization reaction comprises the following steps: (1) preparation of a modified carrier: completely dissolving metal salt in an excess acid solution, adjusting pH through alkali liquor, and then aging, washing, drying, grinding and calcining to obtain a modified carrier; and (2) preparation of the supported catalyst: completely dissolving the modified carrier in water to obtain a carrier solution; and adding heteropoly acid into the carrier solution, and impregnating and drying to obtain the supported catalyst. According to the supported catalyst for catalytic oxidation desulfurization reaction and the preparation method of the supported catalyst, the carrier is modified to improve the catalytic performance of the catalyst; and the prepared supported catalyst is simple, efficient, cheap, high in stability, easy to recycle and capable of being recycled for multiple times, and is simple to prepare, convenient to operate, low in preparation cost and easy to recycle.

Description

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Claims

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Application Information

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Owner SHIHEZI UNIVERSITY
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