CN101444746B - A preparation method of CeO*-mol sieve catalyst - Google Patents
A preparation method of CeO*-mol sieve catalyst Download PDFInfo
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- CN101444746B CN101444746B CN2009100952719A CN200910095271A CN101444746B CN 101444746 B CN101444746 B CN 101444746B CN 2009100952719 A CN2009100952719 A CN 2009100952719A CN 200910095271 A CN200910095271 A CN 200910095271A CN 101444746 B CN101444746 B CN 101444746B
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- molecular sieve
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- sieve catalyst
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Abstract
The present invention provides a preparation method of CeO*-mol sieve catalyst which takes cerous nitrate and molecular sieve with strong acid as raw material and takes mechanical lapping method for preparation of CeO*-mol sieve catalyst, wherein mass ratio of CeO<SUB>2</SUB>/molecular sieve in the catalyst is 8/1-1/10, and molecular sieve as one of H-USY, H-SSY, H-ZSM-5 or H-BETA molecular sieve. The process is simple, cost low, and has good catalysis and degradation activity and stability to chloring-containing organic compounds like carrene (DCM), dichloroethanes (DCE) and ethinyltrichloride (TCE).
Description
Technical field
The present invention relates to a kind of preparation method of chloride organic exhaust gas combustion catalyst, particularly relate to CeO
2The preparation method of-molecular sieve catalyst.
Background technology
Chloride VOC (CVOCs) is a kind of of VOCs pollutant, common have carrene (DCM), chloroform (CF), dichloroethanes (DCE), trichloro-ethylene (TCE), carbon tetrachloride (CT), a chlorobenzene (PhCl) etc., and they are as a kind of organic solvent commonly used and the semi-finished product in the chemical process and be widely used.But this class material has great harm to environment and health.For the removal of chlorinated organics, the method for main at present employing flame combustion is carried out post processing.With the heat treatment phase ratio, catalytic combustion is because its advantage technical and economically, is handle important of VOCs pollutant purification and one of effective means very, equally, also more and more is subjected to people's attention in the application aspect the elimination CVOCs.Great majority all concentrate on following four class catalyst about the research report of CVOCs catalyst for catalytic combustion: noble metal, transition metal, rare earth and composite oxides thereof, molecular sieve and metal load type molecular sieve thereof.Yet noble metal catalyst and transition-metal catalyst as Pt, Pd, Ru, Rh, Ir, Au, Cu, Co, Ni, Mn, Fe, Cr, Ag, V etc., have advantages of high catalytic activity to the oxidative degradation of CVOCs, but are easily poisoned and inactivation by product hydrochloric acid and chlorine.Molecular screen material and metal load type molecular sieve thereof have good architectural characteristic, has Stability Analysis of Structures as Y molecular sieve, the acid strength height, characteristics such as acid density is big, have Bronsted acid center and Lewis acid centers, become the research focus in this field, yet CVOCs easily produces many chlorine of accessory substance thing on these catalyst surfaces, catalyst is carbon distribution and inactivation easily also.Rare earth and composite oxides thereof are as one pack system CeO
2Be catalyst, in the reaction of catalysis elimination CVOCs, show good oxidation susceptibility, also caused people's extensive concern.Therefore, the chloride efficiently organic exhaust gas combustion catalyst of exploitation has great importance for the extensive use of catalytic combustion technology.
Summary of the invention
The purpose of this invention is to provide a kind of chloride efficiently organic exhaust gas combustion catalyst, specifically be meant CeO
2The preparation method of-molecular sieve catalyst.
CeO provided by the invention
2The preparation method of-molecular sieve catalyst is raw material with cerous nitrate with having highly acid molecular sieve, adopts mechanical milling method to prepare CeO
2-molecular sieve catalyst.CeO in the catalyst
2The mass ratio of/molecular sieve is 8/1～1/10; CeO
2The preparation process of-molecular sieve catalyst is: by described CeO
2The mass ratio of/molecular sieve is with molecular sieve powder and the inferior cerium [Ce (NO of solid nitric acid
3)
36H
2O] direct mixed grinding, grind to make and mix, then 100 ℃ dry 2 hours down, 350 ℃ of following roastings 0.5 hour were handled 500～650 ℃ of following roastings in 2 hours again, made CeO
2-molecular sieve catalyst.
Molecular sieve of the present invention is a kind of of H-USY, H-SSY, H-ZSM-5 or H-BETA molecular sieve.
CeO of the present invention
2CeO in the-molecular sieve catalyst
2The optimum quality ratio of/molecular sieve is 2/1～1/8.
CeO provided by the present invention
2The preparation method of-molecular sieve catalyst, its advantage is: adopting the cheap cerous nitrate and the molecular sieve of suitability for industrialized production is raw material, adopts mechanical milling method to make CeO
2-molecular sieve catalyst, preparation technology is simple, and the catalyst cost is low.It is a kind of chloride efficiently organic exhaust gas combustion catalyst, this catalyst has good catalytic degradation active and stable to carrene (DCM), dichloroethanes (DCE) and trichloro-ethylene chlorine-containing organic compounds such as (TCE), and the extensive use of catalytic combustion technology is had great importance.
The specific embodiment:
Embodiment 1
Take by weighing 2.52g cerous nitrate and 8.0g molecular sieve (H-USY, H-SSY, H-ZSM-5 or H-BETA) powder respectively, mix the back and grind, it is even to be ground to mixture.Then 100 ℃ dry 2 hours down, 350 ℃ of following roastings 0.5 hour were handled 550 ℃ of following roastings in 2 hours again, made CeO
2-molecular sieve catalyst, CeO in this catalyst
2The mass ratio of/molecular sieve is 1/8.
Embodiment 2
With embodiment 1 identical operations, difference is: change the consumption of cerous nitrate into 15.14g, the consumption of H-USY molecular sieve changes 3.0g into, CeO in this catalyst
2The mass ratio of/molecular sieve is 2/1.
Embodiment 3
With embodiment 1 identical operations, difference is: change the consumption of cerous nitrate into 20.18g, the consumption of H-USY molecular sieve changes 1.0g into, changes 550 ℃ sintering temperatures into 650 ℃, CeO in this catalyst
2The mass ratio of/molecular sieve is 8/1.
Catalyst is as shown in the table to the catalytic degradation activity of chlorinated organics in 1～3 example:
Annotate: 0.3ml, particle diameter are 60-80 purpose catalyst, and air speed is 10000h
-1
Claims (2)
1. CeO
2The preparation method of-molecular sieve catalyst is characterized in that, is raw material with cerous nitrate with having highly acid molecular sieve, adopts mechanical milling method to prepare CeO
2-molecular sieve catalyst, described highly acid molecular sieve are a kind of of H-USY, H-SSY, H-ZSM-5 or H-BETA molecular sieve, CeO in the catalyst
2The mass ratio of/molecular sieve is 8/1～1/10; Preparation process is: by described CeO
2The mass ratio of/molecular sieve, with molecular sieve powder and the direct mixed grinding of the inferior cerium of solid nitric acid, grinding makes and mixes; Then 100 ℃ dry 2 hours down, 350 ℃ of following roastings 0.5 hour were handled 500～650 ℃ of following roastings in 2 hours again, made CeO
2-molecular sieve catalyst.
2. CeO according to claim 1
2The preparation method of-molecular sieve catalyst is characterized in that: described CeO
2The optimum quality ratio of/molecular sieve is 2/1～1/8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100952719A CN101444746B (en) | 2009-01-06 | 2009-01-06 | A preparation method of CeO*-mol sieve catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100952719A CN101444746B (en) | 2009-01-06 | 2009-01-06 | A preparation method of CeO*-mol sieve catalyst |
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| CN101444746A CN101444746A (en) | 2009-06-03 |
| CN101444746B true CN101444746B (en) | 2010-12-01 |
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| CN2009100952719A Expired - Fee Related CN101444746B (en) | 2009-01-06 | 2009-01-06 | A preparation method of CeO*-mol sieve catalyst |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784557A (en) * | 2011-05-18 | 2012-11-21 | 王文初 | Method and device for treating pharmaceutical and chemical waste gases |
| CN102627287B (en) * | 2012-04-20 | 2014-04-16 | 浙江大学 | Method for synthesizing molecular sieve under solvent-free condition through grinding solid phase raw materials |
| CN102773072A (en) * | 2012-07-29 | 2012-11-14 | 南京工业大学 | Cerium element-modified mesoporous silica adsorbent and preparation method for adsorbent and application in gasoline desulfurization |
| CN108993134B (en) | 2018-07-16 | 2021-05-25 | 天津大学 | Method for degrading ester VOCs (volatile organic compounds) by using low-temperature microwave-enhanced cerium oxide-loaded palladium monatomic catalyst |
| CN109126290A (en) * | 2018-09-20 | 2019-01-04 | 俞小峰 | A kind of high-strength anti-flaming air filting material and preparation method thereof |
| CN112295588B (en) * | 2020-09-23 | 2024-04-02 | 山西晟莱再生资源科技有限公司 | Preparation and application of catalyst for catalytic conversion of pyrolysis oil gas of waste tires |
| CN112619693B (en) * | 2021-01-11 | 2022-07-12 | 南京大学 | Low-temperature denitration catalyst and application thereof |
| CN113617380A (en) * | 2021-08-17 | 2021-11-09 | 安徽工业大学 | Preparation method of HZSM-5 molecular sieve modified high-performance cerium-based denitration catalyst |
| CN115518673A (en) * | 2022-10-25 | 2022-12-27 | 浙江大学 | Preparation method of Pt-CeTi composite molecular sieve catalyst for efficiently degrading VOCs (volatile organic compounds) |
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