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Amorphous, high-efficiency, high carbon deposition resistance, deep desulfurization catalyst

A desulfurization catalyst and deep desulfurization technology, which is applied in the field of amorphous, high-efficiency, high anti-coking, and deep desulfurization catalysts, can solve problems such as inability to meet requirements, and achieve low production costs, extended service life, and good selectivity. Effect

Inactive Publication Date: 2008-07-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing catalyst preparation process can no longer meet the current requirements for low-sulfur fuels, and there is an urgent need to develop a catalyst capable of deep desulfurization

Method used

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  • Amorphous, high-efficiency, high carbon deposition resistance, deep desulfurization catalyst
  • Amorphous, high-efficiency, high carbon deposition resistance, deep desulfurization catalyst

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] 5 g of γ-Al modified with 10 wt% titanium 2 o 3 Degas and dehydrate at 110°C for 3 hours, then transfer to a vacuum device, maintain the vacuum at 650mmHg-750mmHg for 2 hours; weigh a certain amount of ammonium molybdate in the solvent and add it to the surface Activator nonylphenol polyoxyethylene ether, and keep stirring until all the ammonium molybdate is dissolved, the amount of solvent is based on covering all the carrier; the solution is impregnated on the carrier that has been vacuum dehydrated and degassed and heated at room temperature Dry under the conditions; put the above dried catalyst into a muffle furnace for calcination, and heat it up to 500°C at a constant heating rate and keep it for 2 hours; repeat the above process to impregnate another active component, cobalt nitrate; A good catalyst is characterized in a self-made microreactor. The evaluation conditions have been given in detail above. The specific characterization results are shown in the follo...

example 2

[0033] The specific preparation process of the catalyst is the same as Example 1, except that the amount of titanium used for carrier modification is 5 wt%. The specific characterization results are shown in the table below:

[0034] composition

[0035] It can be seen that the conversion rate of thiophene is 95.89%, the conversion rate of styrene is 36.44%, and the conversion rate of cyclopentadiene is 32.91%.

example 3

[0037] The specific preparation process of the catalyst is the same as Example 1, except that the surfactant sodium dodecylbenzenesulfonate is added. The specific characterization results are shown in the table below:

[0038] composition

[0039] It can be seen that the conversion rate of thiophene is 97.53%, the conversion rate of styrene is 17.89%, and the conversion rate of cyclopentadiene is 18.36%.

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Abstract

The invention provides a catalyst used in deep desulfurization of gasoline and diesel; the catalyst can reduce the thiophene content in oil products from 40000ppm to less than 0.5ppm and has certain anti-adhesion ability to alkene thus solving perfectly the deactivation problem of the catalyst caused by carbon deposition. Metal or nonmetal elements utilized by a carrier during the preparation process of the catalyst are modified, and activated components are immersed to the carrier separately, and calcined step by step. The catalyst is pre-vulcanized by hydrogenation-pre-vulcanization during the reaction process, and the space velocity of pre-vulcanized liquid is different from the liquid space velocity of the reaction material.

Description

Technical field: [0001] The object of the present invention is to provide a method and a new process for preparing a novel catalyst which is amorphous, highly efficient, and highly resistant to carbon deposition and can be used for deep desulfurization of gasoline, diesel oil and other oil products. The catalyst prepared by the invention has excellent desulfurization performance, strong anti-adsorption ability to olefins, and well solves the problem of deactivation of the catalyst due to carbon deposition. The catalyst prepared by the method provided by the invention can reduce the content of organic sulfur in the oil from 40000ppm to less than 0.5ppm, even to 0ppm. technical background: [0002] With the increasingly stringent environmental protection regulations in the world, the oil refining industry is facing great challenges and opportunities in terms of reproduction and environmental protection. Various catalytic technologies for the production of clean fuels have bee...

Claims

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Application Information

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IPC IPC(8): B01J23/882B01J21/04B01J29/076C10G45/08
Inventor 张敬畅赵德玉曹维良
Owner BEIJING UNIV OF CHEM TECH
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