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Regular carrier catalyst with desulfurization effect as well as preparation and application thereof

A technology for regular carrier and desulfurization, which is applied to a regular carrier catalyst with desulfurization effect and the field of preparation and application thereof, can solve the problems such as the decrease of octane number of gasoline products, affecting the effect of desulfurization of sulfur-containing hydrocarbons, and the loss of octane number.

Inactive Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrodesulfurization reacts sulfur-containing hydrocarbons such as gasoline with hydrogen in the presence of a hydrogenation catalyst. With the increasingly stringent fuel standards, this requires more severe hydrogenation reaction conditions such as higher reaction pressure or temperature to make sulfur Lower levels, but due to the large amount of olefins in gasoline, increasing the hydrogenation severity will result in higher octane loss
Adsorption desulfurization is usually carried out by contacting the adsorbent with sulfur-containing hydrocarbons under the condition of hydrogen. First, the sulfur-containing hydrocarbons in the oil are captured on the adsorbent, hydrogenated to generate hydrogen sulfide, and then combined with zinc oxide to form sulfur-zinc compounds. , will also lead to a decrease in the octane number of gasoline products; in addition, when the sulfur bound on the zinc oxide reaches saturation, it will lead to a decrease in desulfurization activity, and the sulfur must be removed through oxidation regeneration. In the frequent oxidation regeneration-reduction process, the adsorbent The deactivation rate is high, which affects the implementation effect of sulfur-containing hydrocarbon desulfurization

Method used

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  • Regular carrier catalyst with desulfurization effect as well as preparation and application thereof
  • Regular carrier catalyst with desulfurization effect as well as preparation and application thereof
  • Regular carrier catalyst with desulfurization effect as well as preparation and application thereof

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preparation example Construction

[0053] The method for preparing a structured carrier catalyst provided by the invention includes the step of preparing a suspension. The preparation method of the suspension includes: forming a mixture of metal powder, a hydroxyl-containing solvent and a surfactant, and treating it under ultrasonic waves to obtain a mixed liquid after ultrasonic treatment; wherein, during the ultrasonic treatment process, the fine particles are peeled off from the metal powder The metal particles are suspended in a hydroxyl-containing solvent (solvent for short); the larger particles are separated from the ultrasonically mixed solution to obtain a suspension, and the suspension contains fine particles containing modified metals. The metal powder (also known as metal powder) can be pure metal powder (when the metal film only contains modified metal and the modified metal is one kind), alloy powder containing modified metal and boron, containing Alloy powder of various modified metals. Wherein,...

specific Embodiment approach

[0065] A specific embodiment of the preparation method of the structured carrier catalyst provided by the present invention includes the following steps: uniformly mixing the metal powder and the hydroxyl-containing solvent, and then using a specific ultrasonic power of 50-250W / (100g hydroxyl-containing solvent), preferably 100- Ultrasonic treatment at a power of 150W / (100g hydroxyl-containing solvent) for 5 to 8 hours, and then centrifuge the ultrasonically mixed solution at 1200 to 3000 rpm, preferably 1500 to 2500 rpm, to obtain a suspension; then The substrate and / or molecular sieve and / or particles containing the substrate and molecular sieve are mixed with the suspension, uniformly dispersed, freeze-dried, and coated with a regular carrier to prepare a regular carrier catalyst. The average particle size of the metal powder is less than 20 microns, preferably 1-15 microns or 3-18 microns; the metal powder: hydroxyl-containing solvent = 1:2-15 weight ratio, preferably 1:5-1...

Embodiment 1

[0095] (1) Prepare the substrate containing metal film:

[0096] First, add 10g of nickel powder (average particle size of nickel powder is 10 microns, source: Sinopharm Group) and 100ml of ethylene glycol (Sinopharm Group, purity AR) to a 200ml jar, mix well, then add 60mg of surfactant Gandan Na2SO4 (purity AR, source: Nanjing Pars Biotechnology Co., Ltd.); then, the reaction vessel (jar) was placed in an ultrasonic cleaning machine, and was ultrasonically treated with 160W power for 6h (frequency 40KHz); the ultrasonically The liquid is centrifuged at 1500r / min for 20min in a centrifuge, and the supernatant (i.e. suspension) is taken out with a straw. The concentration of metallic nickel in the suspension is 15g / Kg, D 90 is 5nm;

[0097] Mix 13.5 g of the above-mentioned alumina matrix particles JZ1 and 10 g of deionized water, and grind to obtain D 90 It is a 5 micron slurry, which is added to 100 grams of the above suspension; stirred for 10 minutes to obtain a mixture,...

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Abstract

The invention discloses a regular carrier catalyst with a desulfurization effect as well as preparation and application thereof. The regular carrier catalyst comprises a regular carrier and an activecoating attached to the surface of the regular carrier, wherein the active coating comprises a heat-resistant inorganic oxide matrix and a modified metal film, the modified metal film comprises a modified metal, and the modified metal is one or more of Fe, Co, Ni, Mn, Ti, Zr, V, Ge, Pb, Sn, Sb and Bi. The preparation method comprises the following steps: forming a mixture from metal powder, a hydroxyl-containing solvent and a surfactant, then treating the mixture under ultrasonic waves to obtain a mixed solution after the ultrasonic treatment; separating the mixed solution after the ultrasonictreatment to obtain suspension; contacting the suspension with matrix particles, carrying out freeze drying so as to obtain matrix particles containing a modified metal film, and then coating the regular carrier with the matrix particles containing the modified metal film so as to obtain the regular carrier catalyst. The catalyst is high in desulfurization activity, good in stability and high inproduct yield, is used for gasoline desulfurization and is small in octane number loss.

Description

technical field [0001] The invention relates to a modified molecular sieve used for hydrogen desulfurization, a preparation method and an application method thereof. Background technique [0002] Sulfur in fuel produces sulfur oxides after combustion, which can inhibit the activity of noble metal catalysts in automobile exhaust converters and cause them to be irreversibly poisoned, and cannot achieve catalytic conversion of toxic gases in automobile exhaust, thereby emitting Exhaust gas from automobiles contains unburned non-methane hydrocarbons, nitrogen oxides, and carbon monoxide. These toxic gases are easily catalyzed by sunlight to form photochemical smog and cause acid rain. Sulfur oxide itself is also one of the main causes of acid rain. [0003] Reducing the sulfur content of fuels such as gasoline and diesel is considered one of the most important measures to improve air quality. As people pay more and more attention to environmental protection, environmental prote...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/75B01J23/755B01J23/888C10G45/06C10G45/08
CPCB01J23/755B01J23/745B01J23/75B01J23/888C10G45/06C10G45/08C10G2300/1037C10G2300/104C10G2300/1044C10G2300/202C10G2300/70C10G2400/02
Inventor 王鹏孙言严加松宋海涛姜秋桥田辉平林伟龙军
Owner CHINA PETROLEUM & CHEM CORP
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