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High-stability ceramic honeycomb catalyst and preparation method thereof

A ceramic honeycomb, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of poor mechanical properties, low catalytic activity, etc., and achieves high catalytic activity. , the effect of excellent catalytic performance

Active Publication Date: 2020-09-22
无锡尚好蓝图环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The ceramic catalysts currently on the market have poor mechanical properties and low catalytic activity, which cannot meet our needs in practical use. Based on this situation, we disclose a high-stable ceramic honeycomb catalyst and its preparation method to solve this problem

Method used

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  • High-stability ceramic honeycomb catalyst and preparation method thereof
  • High-stability ceramic honeycomb catalyst and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0049] S1: Prepare materials:

[0050] S2: Preparation of modified additives:

[0051] Mix polyacrylonitrile, polystyrene, and dimethylformamide, stir in an oil bath at 60°C for 20 hours, and perform electrospinning at a spinning voltage of 7kV to obtain spun fibers, and then place the spun fibers at 270°C to pre- Oxidize for 1 hour, heat up to 900°C under the protection of nitrogen, heat-preserve for 2 hours, cool down and place in concentrated nitric acid for acidification to obtain modified carbon fibers;

[0052] Mix graphene oxide and absolute ethanol, stir and dissolve for 15 minutes, ultrasonically treat for 10 minutes, and then place in a ball mill for ball milling and disperse for 2 hours to obtain a surface treatment agent;

[0053] Take modified carbon fibers, mullite fibers and hollow microspheres, dissolve them in absolute ethanol, mix and stir for 12 hours, then add surface treatment agent, disperse ultrasonically for 10 minutes, and dry in vacuum at 80°C to obt...

example 2

[0063] S1: Prepare materials:

[0064] S2: Preparation of modified additives:

[0065] Mix polyacrylonitrile, polystyrene, and dimethylformamide, stir in an oil bath at 65°C for 22 hours, and perform electrospinning at a spinning voltage of 7kV to obtain spun fibers, which are then preheated at 272°C. Oxidation for 1.1h, heating up to 905°C under nitrogen protection, heat preservation for 2.2h, cooling to acidification in concentrated nitric acid to obtain modified carbon fibers;

[0066] Mix graphene oxide and absolute ethanol, stir and dissolve for 18 minutes, ultrasonically treat for 11 minutes, and place in a ball mill for ball milling and dispersing for 2.1 hours to obtain a surface treatment agent;

[0067] Take modified carbon fibers, mullite fibers and hollow microspheres, dissolve them in absolute ethanol, mix and stir for 13 hours, then add surface treatment agent, ultrasonically disperse for 15 minutes, and vacuum dry at 82°C to obtain modified additives;

[0068]...

example 3

[0077] S1: Prepare materials:

[0078] S2: Preparation of modified additives:

[0079] Mix polyacrylonitrile, polystyrene, and dimethylformamide, stir in an oil bath at 70°C for 24 hours, and perform electrospinning at a spinning voltage of 8kV to obtain spun fibers, and then place the spun fibers at 275°C to pre- Oxidation for 1.2 hours, heating up to 910°C under nitrogen protection, heat preservation for 2.5 hours, cooling to acidification in concentrated nitric acid to obtain modified carbon fibers;

[0080] Mix graphene oxide and absolute ethanol, stir and dissolve for 20 minutes, ultrasonically treat for 12 minutes, and then place in a ball mill to disperse for 2.2 hours to obtain a surface treatment agent;

[0081] Take modified carbon fibers, mullite fibers and hollow microspheres, dissolve them in absolute ethanol, mix and stir for 14 hours, then add surface treatment agent, ultrasonically disperse for 20 minutes, and vacuum dry at 85°C to obtain modified additives; ...

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Abstract

The invention discloses a high-stability ceramic honeycomb catalyst and a preparation method thereof. The catalyst comprises a catalyst carrier and an active component, the active component is loadedon the surface of the catalyst carrier, wherein the catalyst carrier comprises silicon carbide, a sintering aid, talcum powder, diatomite, a modified additive and the like; traditional ceramic catalyst carriers are basically processed and formed through molds, the carriers are simple in overall structure and are mostly of straight-through hole ceramic structures, and the catalyst carrier high in strength and large in specific surface area is prepared through the laser sintering technology in the invention, so that the loading rate of active component is increased, and the catalytic activity ofthe finished product is further improved. According to the high-stability ceramic honeycomb catalyst and the preparation method thereof disclosed by the invention, the process operation is simple, the component proportion is proper, the prepared catalyst is excellent in catalytic performance and high in catalytic activity, the strength of the catalyst carrier is high, and the catalyst can be applied to industrial VOCs treatment and has high practicability.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a highly stable ceramic honeycomb catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) are the general term for organic compounds that participate in atmospheric photochemical reactions, usually divided into non-methane hydrocarbons (NMHCs for short), oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, sulfur-containing organic compounds kind. [0003] With the deepening of the research, we found that unorganized emissions accounted for 60% of my country's industrial VOCs emissions, that is to say, a considerable part of the VOCs emitted by industrial enterprises is directly discharged into the atmosphere without collection and treatment. The environment brings great pollution. [0004] The ceramic catalysts currently on the market have poor mechanical properties and low cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224B01J35/02B01J35/04B01J35/08B01J35/10B01D53/86B01D53/44F23G7/07B01J35/00
CPCB01J27/224B01D53/8687F23G7/07B01D2257/708F23G2209/14B01J35/40B01J35/56B01J35/51B01J35/61Y02A50/20
Inventor 周红军梁妃涛
Owner 无锡尚好蓝图环保科技有限公司
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