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Catalyst carrier for tar cracking, catalyst and preparation method of catalyst carrier

A catalyst carrier, tar cracking technology, applied in the direction of catalyst carrier, catalyst activation/preparation, physical/chemical process catalyst, etc. Catalytic cracking tar ability, reducing initial particle size, preventing the effect of active metal agglomeration

Active Publication Date: 2021-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned catalyst uses natural ore as a carrier, which has certain mechanical strength and wear resistance, but the strength of palygorskite and olivine decreases after roasting, and because the specific surface area of ​​the carrier is small, the active components adopt coprecipitation or frying. Loaded on the carrier, the active ingredient and the carrier have poor binding force and are easy to fall off

Method used

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  • Catalyst carrier for tar cracking, catalyst and preparation method of catalyst carrier
  • Catalyst carrier for tar cracking, catalyst and preparation method of catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Mix white carbon black and carbon black and grind them finely, and put them into a roller compactor. Slowly add sucrose, turnip powder, polyvinyl alcohol (average molecular weight: 22,000), and nickel nitrate into deionized water containing 5 wt% ethanol, stir rapidly for 2 hours, and adjust the pH to 3 with nitric acid. Roll the powder in a roller compactor for 2 hours, during which the above-mentioned liquid is slowly added, and the powder is rolled until a paste can be squeezed. Among them, based on the quality of silica, carbon black is 8%, safflower powder is 5%, polyvinyl alcohol is 1%, nickel nitrate content is 0.3wt%, and the mass ratio of sucrose to silica is 1:1. .

[0047] The above-mentioned extrudable paste was prepared into about 1.0mm microspheres and dried at 120°C. The dried microspheres were sent to a microwave roasting furnace, kept at a constant temperature of 1550 °C for 15 hours in a nitrogen atmosphere, soaked in 40% hydrofluoric acid solution f...

Embodiment 2

[0051] Mix and grind white carbon black, silicon powder, and carbon black, and put them into a roller compactor. Slowly add sucrose, turnip powder, polyvinyl alcohol (average molecular weight: 22,000), and nickel nitrate into deionized water containing 5 wt% ethanol, stir rapidly for 2 hours, and adjust the pH to 3 with nitric acid. Roll the powder in a roller compactor for 2 hours, during which the above-mentioned liquid is slowly added, and the powder is rolled until a paste can be squeezed. Among them, based on the quality of silica, the proportion of formula: 20% of silicon powder, 8% of carbon black, 5% of turnip powder, 1% of polyvinyl alcohol, 0.3wt% of nickel nitrate, sucrose and white The mass ratio of carbon black is 1:1.

[0052] The above-mentioned extrudable paste was prepared into about 1.0mm microspheres and dried at 120°C. The dried microspheres were sent to a microwave roasting furnace, kept at a constant temperature of 1550 °C for 15 hours in a nitrogen atm...

Embodiment 3

[0056] Mix and grind mesoporous silica, silicon powder, and graphite, and put them into a roller compactor. Add glucose, turnip powder, carboxymethyl cellulose, and ferric nitrate slowly to deionized water containing 10 wt% ethanol, stir rapidly for 2 hours, and adjust the pH to 5 with oxalic acid. Roll the powder in a roller compactor for 2 hours, during which the above-mentioned liquid is slowly added, and the powder is rolled until a paste can be squeezed. Among them, based on the quality of mesoporous silica, the proportion of the formula is: 50% of silicon powder, 15% of graphite, 9% of turnip powder, 1% of carboxymethyl cellulose, 1% of ferric nitrate, glucose The mass ratio to mesoporous silica is 0.3:1.

[0057] The above-mentioned extrudable paste was prepared into about 1.0mm microspheres and dried at 120°C. The dried microspheres were put into a microwave roasting furnace, kept at a constant temperature of 1700 °C for 7 hours in a nitrogen atmosphere, soaked in 40...

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Abstract

The invention discloses a catalyst carrier for tar cracking, a catalyst and a preparation method of the catalyst carrier. The preparation method comprises the following steps: (1) mixing a silicon source, a modifier and optional silicon powder, conducting grinding, and slowly adding a carbon source and an auxiliary solution during grinding; (2) molding, drying and roasting the material obtained in the step (1), conducting mixing with a hydrofluoric acid solution, and conducting washing; (3) makinging the material obtained in the step (2) contact with oxygen-containing gas and carrying out high-temperature treatment; and (4) mixing the material obtained after high-temperature treatment in the step (3) with an alkaline solution or a hydrofluoric acid solution for treatment, and then performing washing, drying and roasting treatment to obtain the carrier. The catalyst is large in specific surface area, resistant to abrasion, high in activity, high in microwave absorption rate, good in thermal shock resistance, high in water resistance at high temperature, resistant to sintering and carbon deposition and capable of being recycled for a long time.

Description

technical field [0001] The invention belongs to the technical field of biomass energy processing, and in particular relates to a catalytic material for preparing oil and gas products through catalytic pyrolysis of biomass and realizing tar conversion and a preparation method thereof. Background technique [0002] The removal of bio-tar has been plagued by the biomass pyrolysis and gasification industry. At present, among the many tar removals, the catalytic cracking method is a very tar removal method, and the catalyst is one of the research cores of the catalytic cracking method. one. [0003] The nature of bio-tar is unstable, its composition is extremely complex, and it contains solid particles and carries a large amount of water vapor. Therefore, the cracking reaction of bio-tar is a collection of a series of complex reactions. The specific surface area makes it have a longer residence time, and at the same time, the high specific surface area is conducive to loading mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J32/00B01J35/10B01J37/02B01J37/08B01J37/34C10K1/00C10K1/34
CPCB01J27/24B01J37/0207B01J37/08B01J37/346C10K1/34C10K1/002B01J35/30B01J35/613B01J35/615B01J35/635B01J35/633Y02P20/52
Inventor 张彪宋永一蔡海乐王鑫赵丽萍吴斯侃王博刘继华张长安
Owner CHINA PETROLEUM & CHEM CORP