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

A technology of structured carrier and desulfurization, which is applied in the field of structured carrier catalyst with desulfurization and its preparation and application, can solve the problems of octane number loss, affecting the desulfurization effect of sulfur-containing hydrocarbons, and high deactivation rate of adsorbents

Pending 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

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preparation example Construction

[0078] 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. Among th...

Embodiment approach

[0093] According to the first embodiment described in the preparation method of the structured carrier catalyst of the present invention, preferably, the substrate coating slurry contains 40-75% by weight, for example, 50-70% by weight of aluminum oxide based on its dry weight. Aluminum oxide source and 25-60% by weight, such as 30-50% by weight, of at least one metal oxide in groups IIA and IIB. Preferably, it contains 60-70% by weight of an alumina source calculated as alumina and 30-40% by weight of at least one metal oxide in groups IIA and IIB.

[0094] According to the first embodiment of the preparation method of the structured carrier catalyst of the present invention, the matrix coating and the modified molecular sieve coating formed on the structured carrier are collectively referred to as the active component coating. Preferably, based on the total weight of the structured carrier catalyst, the total content of the matrix coating and the modified molecular sieve coa...

specific Embodiment approach

[0107] 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 4 to 10 hours, for example, 5 to 8 hours, and then centrifuge the ultrasonically mixed solution at 1200 to 3000 rpm, preferably 1500 to 2500 rpm, to obtain Suspension liquid; then mix the matrix and / or molecular sieve and / or particles containing matrix and molecular sieve with the suspension liquid, disperse evenly, freeze-dry, and coat the regular carrier to prepare the 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, p...

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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 outer surface of the regular carrier, the active coating comprises a IIA and IIB group metal oxide-containing matrix, a molecular sieve and a modified metal film, and the modified metal film comprises nickel and one or more rare earth metals selected from lanthanum, cerium, praseodymium and neodymium. 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 ultrasonic treatment to obtain suspension; contacting the suspension with matrix particles and / or molecular sieve particles or particles containing a matrix and a molecular sieve, carrying out freeze-drying, and then coating on a regular carrier. The catalyst can be used for hydro-desulfurization of hydrocarbon fuel, has the characteristics of high activity and good stability, is used for gasoline desulfurization, and can increase the octane number of gasoline.

Description

technical field [0001] The invention relates to a catalyst with a regular structure for desulfurization of hydrocarbons in the presence of hydrogen, 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 enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C10G45/12
CPCB01J29/85C10G45/12C10G2300/1037C10G2300/104C10G2300/1044C10G2300/70C10G2300/202C10G2400/02
Inventor 宋海涛王鹏孙言姜秋桥严加松田辉平张久顺
Owner CHINA PETROLEUM & CHEM CORP
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