CN104707667A - Preparation method for catalyst carrier - Google Patents
Preparation method for catalyst carrier Download PDFInfo
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- CN104707667A CN104707667A CN201510103865.5A CN201510103865A CN104707667A CN 104707667 A CN104707667 A CN 104707667A CN 201510103865 A CN201510103865 A CN 201510103865A CN 104707667 A CN104707667 A CN 104707667A
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Abstract
The invention provides a preparation method for a catalyst carrier. The preparation method comprises the following steps: conducting acid modification on montmorillonoid to ensure that the modified montmorillonoid is larger in specific surface area and pore diameter, and higher in absorbability and chemical activity; taking the modified montmorillonoid, silicon carbide powder and mica as raw materials for a carrier coating, and adding activated carbon to form pores, so that the carrier coating on a cordierite surface is large in specific surface area, and has abundant pore path structures, and an integral-type catalyst carrier obtained according to the preparation method has more active constituent attachment sites.
Description
Technical field
The present invention relates to a kind of catalyst carrier and preparation method thereof, be specifically related to a kind of integrated catalyst carrier with porous carrier coating.
Background technology
Integral catalyzer (monolithic catalysts) is by the integrated catalyst of many narrow parallel channels proper alignment.The cross section of the integral catalyzer used carrier of early development is honeycomb, therefore is referred to as honeycombed catalyst again.
Conventional integrated catalyst carrier has the pottery of integrated structure and the alloy of integrated structure, and wherein representative is honeycomb-like cordierite and sheet or column FeCrAl alloy.The geometrical feature of this kind of carrier is decided by the thickness of the shape of passage, size and partition, and pore volume, porosity, total surface area and kinetic diameter that these factors determine them are limited.The specific area of these two kinds of carriers general is all very low, is that carrier catalysis efficiency is also very low if independent with it.In order to improve the utilization rate of integrated structure carrier, usually in the attachment position of its surface coating one deck inorganic oxide as active component, to increase its specific area.
Summary of the invention
The object of the present invention is to provide a kind of integrated catalyst carrier and preparation method thereof, by sour modified montmorillonoid, the specific area of imvite is increased, aperture also increases, make it that there is stronger adsorptivity and chemism simultaneously, using modified imvite and silicon carbide powder and the mica raw material as carrier coating, add active carbon pore-creating, make the carrier coating on cordierite surface have the abundant pore passage structure of high-ratio surface sum, and the integrated catalyst carrier obtained by the application's method have more active component attachment position.
For achieving the above object, the technical solution used in the present invention is as follows:
A preparation method for catalyst carrier, is characterized in that, comprises the steps:
A) modification of imvite: get imvite raw material, soak by deionized water, after fully stirring, imvite is fully disperseed in deionized water, then use 50 mesh screen dispersion liquids, to remove bulky grain in dispersion liquid, then filtrate is used 300 mesh screen, obtaining granularity is 50-300 object imvite powder, the imvite powder of acquisition is placed in the HCl solution that concentration is 15wt%, stir 2 hours at 60 DEG C, centrifugation, spends deionized water 3 times, then the imvite of sour modification is placed in baking oven 80 DEG C of dryings 2 hours, for subsequent use;
B) preparation of carrier coating: take the silicon carbide powder 50g that granularity is 10-15 micron respectively, mica powder 4g, the modified montmorillonoid 35g that step a) obtains, active carbon 10g, by each raw material mixing and ball milling, appropriate water is added while ball milling, after ball milling 2h, ball milling slurry is poured in container, solid-liquid volume ratio in adjustment slurry is 1:1.5, stir 30 minutes, then cordierite honeycomb carrier is placed in slurry fully to flood 30 minutes, take out carrier and after draining unnecessary slurry, cordierite carrier be placed in baking oven 120 DEG C of dryings 1 hour, repeat step 2-3 time of above-mentioned stirring-dipping-drying,
C) carrier that step b) obtains is placed in Muffle furnace, 500 DEG C of roastings 3 hours in air atmosphere, obtain catalyst carrier.
Stir speed (S.S.) in described step b) is 400 revs/min.
The step 2 time of stirring-dipping-drying is repeated in described step b).
The step 3 time of stirring-dipping-drying is repeated in described step b).
Heating rate in described step c) during roasting is 10 DEG C/minute.
beneficial effect of the present invention:
1, present invention employs the imvite of sour modification as carrier coating raw material, through sour modification, imvite has high-specific surface area, adds active component adsorption potential, and is conducive to improving catalytic activity.
2, carrier coating raw material of the present invention not only used modified montmorillonoid, also uses carborundum and mica, by reasonably adjusting the proportioning of each component, makes the carrier coating obtained have good tack, intensity, specific area and pore structure.
3, carrier coating of the present invention employs active carbon as pore creating material in preparation process, thus further increases the total pore volume of coating, is conducive to the absorption of active component.
Detailed description of the invention
embodiment 1
The modification of imvite: get imvite raw material, soak by deionized water, after fully stirring, imvite is fully disperseed in deionized water, then use 50 mesh screen dispersion liquids, to remove bulky grain in dispersion liquid, then filtrate is used 300 mesh screen, obtaining granularity is 50-300 object imvite powder, the imvite powder of acquisition is placed in the HCl solution that concentration is 15wt%, stir 2 hours at 60 DEG C, centrifugation, spends deionized water 3 times, then the imvite of sour modification is placed in baking oven 80 DEG C of dryings 2 hours, for subsequent use;
The preparation of carrier coating: take the silicon carbide powder 50g that granularity is 10-15 micron respectively, mica powder 4g, the modified montmorillonoid 35g that step a) obtains, active carbon 10g, by each raw material mixing and ball milling, appropriate water is added while ball milling, after ball milling 2h, ball milling slurry is poured in container, solid-liquid volume ratio in adjustment slurry is 1:1.5, stir 30 minutes, stir speed (S.S.) is 400 revs/min, then cordierite honeycomb carrier is placed in slurry fully to flood 30 minutes, take out carrier and after draining unnecessary slurry, cordierite carrier be placed in baking oven 120 DEG C of dryings 1 hour, repeat the step 2 time of above-mentioned stirring-dipping-drying,
The carrier of above-mentioned acquisition is placed in Muffle furnace, and heating rate is 10 DEG C/minute, and 500 DEG C of roastings 3 hours in air atmosphere, obtain catalyst carrier.
embodiment 2
The modification of imvite: get imvite raw material, soak by deionized water, after fully stirring, imvite is fully disperseed in deionized water, then use 50 mesh screen dispersion liquids, to remove bulky grain in dispersion liquid, then filtrate is used 300 mesh screen, obtaining granularity is 50-300 object imvite powder, the imvite powder of acquisition is placed in the HCl solution that concentration is 15wt%, stir 2 hours at 60 DEG C, centrifugation, spends deionized water 3 times, then the imvite of sour modification is placed in baking oven 80 DEG C of dryings 2 hours, for subsequent use;
The preparation of carrier coating: take the silicon carbide powder 50g that granularity is 10-15 micron respectively, mica powder 4g, the modified montmorillonoid 35g that step a) obtains, active carbon 10g, by each raw material mixing and ball milling, appropriate water is added while ball milling, after ball milling 2h, ball milling slurry is poured in container, solid-liquid volume ratio in adjustment slurry is 1:1.5, stir 30 minutes, stir speed (S.S.) is 400 revs/min, then cordierite honeycomb carrier is placed in slurry fully to flood 30 minutes, take out carrier and after draining unnecessary slurry, cordierite carrier be placed in baking oven 120 DEG C of dryings 1 hour, repeat the step 3 time of above-mentioned stirring-dipping-drying,
The carrier of above-mentioned acquisition is placed in Muffle furnace, and heating rate is 10 DEG C/minute, and 500 DEG C of roastings 3 hours in air atmosphere, obtain catalyst carrier.
comparative example 1
Cordierite carrier is immersed in Alumina gel, abundant dipping took out after 30 minutes, blow away the glue remained in duct, then cordierite carrier is placed in baking oven 120 DEG C of dryings 5 hours, repeated impregnations-drying steps is until obtain the coating with embodiment 1 same thickness, and then cordierite carrier is placed in Muffle furnace, heating rate is 10 DEG C/minute, 500 DEG C of roastings 3 hours, obtain catalyst carrier.
Detect the specific area of the carrier that embodiment and comparative example obtain and aperture, result is as follows:
Claims (5)
1. a preparation method for catalyst carrier, is characterized in that, comprises the steps:
A) modification of imvite: get imvite raw material, soak by deionized water, after fully stirring, imvite is fully disperseed in deionized water, then use 50 mesh screen dispersion liquids, to remove bulky grain in dispersion liquid, then filtrate is used 300 mesh screen, obtain granularity and be about 50-300 object imvite powder, the imvite powder of acquisition is placed in the HCl solution that concentration is 15wt%, stir 2 hours at 60 DEG C, centrifugation, spends deionized water 3 times, then the imvite of sour modification is placed in baking oven 80 DEG C of dryings 2 hours, for subsequent use;
B) preparation of carrier coating: take the silicon carbide powder 50g that granularity is 10-15 micron respectively, mica powder 4g, the modified montmorillonoid 35g that step a) obtains, active carbon 10g, by each raw material mixing and ball milling, appropriate water is added while ball milling, after ball milling 2h, ball milling slurry is poured in container, solid-liquid volume ratio in adjustment slurry is 1:1.5, stir 30 minutes, then cordierite honeycomb carrier is placed in slurry fully to flood 30 minutes, take out carrier and after draining unnecessary slurry, cordierite carrier be placed in baking oven 120 DEG C of dryings 1 hour, repeat step 2-3 time of above-mentioned stirring-dipping-drying,
C) carrier that step b) obtains is placed in Muffle furnace, 500 DEG C of roastings 3 hours in air atmosphere, obtain catalyst carrier.
2. preparation method as claimed in claim 1, is characterized in that: the stir speed (S.S.) in step b) is 400 revs/min.
3. preparation method as claimed in claim 1, is characterized in that: the step 2 time repeating stirring-dipping-drying in step b).
4. preparation method as claimed in claim 1, is characterized in that: the step 3 time repeating stirring-dipping-drying in step b).
5. preparation method as claimed in claim 1, is characterized in that: the heating rate in step c) during roasting is 10 DEG C/minute.
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CN201510103865.5A CN104707667A (en) | 2015-03-10 | 2015-03-10 | Preparation method for catalyst carrier |
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CN201510103865.5A CN104707667A (en) | 2015-03-10 | 2015-03-10 | Preparation method for catalyst carrier |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102091660A (en) * | 2010-11-10 | 2011-06-15 | 姚光纯 | Bird-nest catalyst carrier |
CN102256600A (en) * | 2008-12-15 | 2011-11-23 | 尤尼弗瑞克斯I有限责任公司 | Ceramic honeycomb structure skin coating |
CN102463143A (en) * | 2010-11-17 | 2012-05-23 | 中国石油化工股份有限公司 | Composite carrier for preparing thin shell catalysts |
CN102574092A (en) * | 2009-06-30 | 2012-07-11 | 蒂森克虏伯伍德有限公司 | Catalyst-coated support, method for the production thereof, a reactor equipped therewith, and use thereof |
-
2015
- 2015-03-10 CN CN201510103865.5A patent/CN104707667A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102256600A (en) * | 2008-12-15 | 2011-11-23 | 尤尼弗瑞克斯I有限责任公司 | Ceramic honeycomb structure skin coating |
CN102574092A (en) * | 2009-06-30 | 2012-07-11 | 蒂森克虏伯伍德有限公司 | Catalyst-coated support, method for the production thereof, a reactor equipped therewith, and use thereof |
CN102091660A (en) * | 2010-11-10 | 2011-06-15 | 姚光纯 | Bird-nest catalyst carrier |
CN102463143A (en) * | 2010-11-17 | 2012-05-23 | 中国石油化工股份有限公司 | Composite carrier for preparing thin shell catalysts |
Non-Patent Citations (2)
Title |
---|
余志伟 等: "《矿物材料与工程》", 31 December 2012 * |
吴任平: "《陶瓷纵横》", 30 November 2013 * |
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