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

A catalyst carrier, tar cracking technology, applied in the direction of catalyst carrier, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problems of difficult long-term stable use, short life, description of tar removal effect, etc. Effect of carbon capacity, high mechanical strength, good high temperature stability

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 former catalyst has certain deficiencies in wear resistance, high temperature water resistance, and high temperature chemical stability. Although the latter catalyst has certain wear resistance and recycling performance, it does not describe the tar removal effect. Shorter, more difficult for long-term stable use in high-wear occasions such as moving beds and fluidized beds

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Slowly add kale powder and polyvinyl alcohol (average molecular weight 22,000) into deionized water containing 0.5wt% ethanol, stir for 2 hours, and adjust the pH to 3 with nitric acid;

[0050] (2) Mix and grind 400-mesh SiC micropowder with silicon powder, alumina, and carbon black, and then put it into a roller compactor for 2 hours, and slowly add the liquid prepared in step (1) during the roller compaction process, and roller compact Until the paste can be squeezed. Among them, based on the quality of SiC micropowder, the proportion of the formula is: 20% silicon powder, 4% alumina, 8% carbon black, 5% squash powder, and 1% polyvinyl alcohol (average molecular weight 22000). The above-mentioned extrudable paste was prepared into about 1.0mm microspheres and dried at 120°C.

[0051] (3) Send the dried microspheres into a microwave roasting furnace, keep the temperature at 1400°C for 9 hours in a nitrogen atmosphere, lower the temperature to 1300°C, and treat in...

Embodiment 2

[0054] (1) Slowly add kale powder and aluminum dihydrogen phosphate into deionized water containing 0.5wt% ethanol, stir rapidly for 2 hours, and adjust the pH to 1 with nitric acid.

[0055] (2) Mix and grind 400-mesh SiC micropowder, silicon powder, kaolin, yttrium oxide, and graphite, and put it into a roller compactor for 2 hours, and slowly add the liquid prepared in step (1) during the roller compaction, and compact it until Squeezeable paste. Among them, based on the quality of SiC powder, the formula ratio is: 50% silicon powder, 10% kaolin, 2% yttrium oxide, 15% graphite, 12% squid powder, and 3% aluminum dihydrogen phosphate. The above-mentioned extrudable paste was prepared into about 1.0mm microspheres and dried at 120°C.

[0056] (3) Send the dried microspheres into a microwave roasting furnace, and treat them at a constant temperature of 1500°C in a nitrogen atmosphere for 6 hours, then lower the temperature to 1000°C, and treat them in an oxygen atmosphere for ...

Embodiment 3

[0059] (1) Slowly add kale powder and silica sol into deionized water containing 0.5wt% ethanol, stir rapidly for 2 hours, and adjust the pH to 7 with oxalic acid.

[0060] (2) Mix and grind 300-mesh SiC micropowder, silicon powder, talc powder, yttrium oxide, and activated carbon, put it into a roller compactor for 2 hours, and slowly add the liquid prepared in step (1) during the roller compaction process, Roll to squeeze paste. Among them, based on the quality of SiC micropowder, the proportion of the formula is: 2% silicon powder, 0.5% talc powder, 0.5% yttrium oxide, 2% activated carbon, 8% squash powder, and 1% silica sol. The above-mentioned extrudable paste was prepared into about 1.0mm microspheres and dried at 120°C.

[0061] (3) Send the dried microspheres into a microwave roasting furnace, keep the temperature at 1200°C in a nitrogen atmosphere for 7 hours, lower the temperature to 950°C, and treat in an oxygen atmosphere for 0.5 hours. After cooling, put it into...

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Abstract

The invention discloses a catalyst carrier for biological tar cracking, a catalyst and a preparation method. The catalyst carrier for biological tar cracking takes a silicon carbide-silicon nitride composite material as a matrix, silicon oxide is distributed on the matrix, and the preparation method comprises the following steps: firstly, preparing the silicon carbide-silicon nitride composite material; then making the composite material contact with oxygen-containing gas for treatment, and conducting cooling to obtain a carrier intermediate A; and conducting mixing with an alkaline solution or a hydrofluoric acid solution, conducting washing, carrying out low-temperature heat treatment, and carrying out high-temperature heat treatment to obtain the biological tar cracking catalyst carrier. The invention also provides the catalyst adopting the carrier. The catalyst for biological tar cracking is good in wear resistance, high in activity, high in microwave absorption rate, good in thermal shock resistance and high in water resistance at high temperature, and the preparation method is simple, low in cost, 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 composition of bio-tar is complex, containing a variety of unstable compounds, and carrying solid particles and water, which lead to its characteristics of easy polymerization, high adhesion, unstable properties, high pollution, and difficult to use. A series of problems caused by it have become limitations. One of the main obstacles to the development and industrialization of biomass gasification technology. [0003] At present, there are many kinds of biomass tar removal methods with different advantages and disadvantages, among which catalytic cracking method is a kind of tar removal method with great development potential. The temperature of the bio-tar cra...

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
CPCB01J27/24B01J37/0207B01J37/08B01J37/346C10K1/34C10K1/002B01J35/613B01J35/633Y02P20/52
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
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