CN103111322A - Preparation method of integral cellular molecular sieve based catalyst for N2O decomposition - Google Patents
Preparation method of integral cellular molecular sieve based catalyst for N2O decomposition Download PDFInfo
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- CN103111322A CN103111322A CN2013100428128A CN201310042812A CN103111322A CN 103111322 A CN103111322 A CN 103111322A CN 2013100428128 A CN2013100428128 A CN 2013100428128A CN 201310042812 A CN201310042812 A CN 201310042812A CN 103111322 A CN103111322 A CN 103111322A
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Abstract
The invention discloses a preparation method of an integral cellular molecular sieve based catalyst for N2O decomposition, which relates to the field of cellular molecular sieve structured catalysts for N2O direct-decomposition, and is applicable to the treatment of high-concentration N2O containing waste gases such as adipic acid tail gas and the like. The method disclosed by the invention comprises the following steps: completely mixing an active molecular sieve component with a granularity of smaller than 100 meshes with an adhesive, wherein the mass ratio of an active molecular sieve to the adhesive is 2:1-4:1; adding an extrusion aid into the obtained mixture, wherein based on the total mass of the active molecular sieve and the adhesive, the mass content of the extrusion aid is 2.5-3%, and the mass contents mentioned below have a same basis; uniformly mixing a pore-forming agent in a mixing machine, wherein the mass content of the pore-forming agent is 0-3%; and placing mixed powder, a peptizer and water into a kneading machine to carry out kneading, thereby obtaining a blank; carrying out extrusion forming on the blank after the blank is aged; and drying and then roasting the blank. The catalyst disclosed by the invention is low in plasticity of 0.1-0.35, good in plasticity, smooth in extrusion process, and uneasy to deform after being extruded.
Description
Technical field
The present invention relates to N
2O directly decomposes with cellular molecular sieve structure catalyst and forming method thereof; Be applicable to adipic acid vent gas treatment etc. and contain high concentration N
2The processing of the waste gas of O.
Background technology
Nitrous oxide is also referred to as nitrous oxide, and popular name is laughing gas, not only has powerful greenhouse effects, can also be serious damage the ozone layer.N
2The anthropogenic discharge of O comprises the tail gas of Chemical Manufacture, as the tail gas that discharges in the processes such as the production of adipic acid and nitric acid and coal-fired fluidized bed burning; The combustion tail gas that also comprises motor vehicle; The burning of organism and discarded object also can produce N
2O。Along with the enhancing of people's environmental consciousness, N
2The processing of O has been subjected to the great attention of vast industrial production industry and environmental protection organization.
N
2The direct decomposition technique of O is exactly N
2O is decomposed into nitrogen and oxygen under the effect of catalyst.At present, be used for N
2The catalyst of the direct decomposition of O has metal oxide catalyst, hydrotalcite derivative complex chemical compound, modified molecular sieve catalyst such as Co-ZSM-5 molecular sieve (US5171553).It is high that the processing of industry adipic acid tail gas needs catalyst to have mechanical strength, and resistance is little, the characteristics that pressure drop is little, so the monolithic construction of catalyst more is conducive to its application.
The preparation of integral catalyzer is divided into self-forming and immobilized dual mode.Immobilized is on the surface of the carrier with a fixed structure and mechanical strength (pottery, metal etc.), by methods such as coatings, catalyst powder is fixed in its surface.CN101204665A disclose a kind of on cordierite carrier original position synthesize and be used for N
2The monoblock type molecular sieve catalyst of the direct decomposition of O, molecular sieve quality are the 5%-30% of integral catalyzer quality; CN102688687 discloses a kind of decomposition nitric acid tail gas N
2The new technology of O, catalyst used are that each active constituent content is: Fe with the zeolite-loaded cellular integrated catalyst of making on ceramic material
2O
31-2%, Al
2O
30-2%, SiO
22-19%, ceramic material 75-90%.Self-forming is that mechanical external force is acted in the forming process of catalyst, makes it have suitable geometry and mechanical strength.CN101905145 has introduced a kind of forming method of molecular sieve cellular material, mediates after molecular sieve, adhesive, diluted acid are mixed to form.
Summary of the invention
The object of the present invention is to provide a kind of for N
2The cellular molecular sieve structure catalyst that O directly decomposes is characterized in that described cellular integrated catalyst is formed by extruding such as active component, adhesive, peptizing agent, extrusion aid, pore creating materials.
It is a kind of for N that another object of the present invention is to provide
2The preparation method of the alveolate texture catalyst of the direct decomposition of O.Its concrete preparation method and processing step are:
A kind of N
2O decomposes with integral honeycomb shape molecular sieve catalyst preparation method, it is characterized in that:
Granularity is fully mixed less than 100 purpose active molecular sieve components and adhesive, active molecular sieve and adhesive mass ratio are 2:1-4:1, add extrusion aid, and extrusion aid is take active molecular sieve and adhesive total amount as benchmark, mass content is 2.5-3%, and the mass content benchmark of below mentioning is same; The pore creating material mass content is 0-3%, evenly mixes in mixer; The active molecular sieve component is the molecular sieve of Fe or Co modification; Molecular sieve is beta-molecular sieve, ZSM-5 molecular sieve or MCM-22 molecular sieve; Fe or Co account for the 1-3% of molecular sieve gross mass;
Mixed powder and peptizing agent and water are put into kneader mediate and make blank, the peptizing agent mass content is that 6-10%, water quality content are 50-60%; The blank that makes is sealed in temperature with plastic sheeting aging less than carrying out in the environment of 25 ℃, ageing time is 4-10h; Then put into the extrusion shaping machine extrusion modling, extrusion pressure is 10-30MPa; The green honeycomb body that makes is placed under 18-25 ℃ the dry 24-48h of typing, then puts it into and carry out drying in drying box, baking temperature is 100-150 ℃, and be 1-2h drying time; At last in 550 ℃ of lower roasting 4-10h.
Active molecular sieve component in the present invention is Fe(or Co) molecular sieve of modification; Molecular sieve is beta-molecular sieve, ZSM-5 molecular sieve or MCM-22 molecular sieve; Modified component is nitrate, the oxalates of iron or cobalt; Method of modifying is ion-exchange or infusion process, and described ion-exchange is that source of iron or cobalt source, molecular sieve, water are mixed, and stirs 4-10 hour under 60-100 ℃.Product after filtration, washing and drying, obtained the molecules of active components sieve in roasting 4-6 hour in 550 ℃ of air atmospheres.Modified component Fe in active molecular sieve used in the present invention, Co accounts for the 1-3% of molecular sieve gross mass.
Adhesive can be boehmite, one or more in alundum (Al2O3), aluminic acid, and the present invention preferentially selects and is the boehmite powder; Peptizing agent can be one or more in nitric acid, tartaric acid, citric acid, and the present invention preferentially selects nitric acid; Described extrusion aid is generally the sesbania powder.Pore creating material is one or more of polyvinyl alcohol, cellulose, urea, polyethylene glycol, and the present invention preferentially selects urea.
Be to guarantee blank extruding smoothly in forming process, the plasticity of the alveolate texture catalyst blank of the prepared direct decomposition for N2O of the present invention is 0.1-0.35.
Committed step of the present invention is aging step, and the length of ageing time can have influence on the plasticity of shaping blank.Ageing time of the present invention exists optimum range a: 4-10h.When ageing time was too short, the plasticity of shaping blank was low; When ageing time was long, due to the loss of moisture, the plasticity of shaping blank is step-down also.
Be 24-48h the typing drying time in drying steps of the present invention; During dry in 100-150 ℃ of drying box, the time is 1-2h; Sintering temperature is 550 ℃, and roasting time is 4-10h.
Catalyst of the present invention has lower plasticity 0.1-0.35, and plasticity is good, and extrusion is smooth, and is not yielding after extruding.
Description of drawings
Fig. 1 is the alveolate texture catalyst of the embodiment of the present invention 1 preparation.
The specific embodiment
Below in conjunction with drawings and Examples, embodiment of the present invention are further illustrated, but the present invention is not limited to listed embodiment.Also should be included in interior other any known change of scope that the present invention protects.
Embodiment 1
Putting into mixer after 118gFe-beta-molecular sieve (wherein Fe ion account for the mass percent of modified molecular screen be 1%) is pulverized and sieved together with 45.92g boehmite, 4.5g sesbania powder evenly mixes; Adding concentration is that 9% aqueous solution of nitric acid 100g mediates, and mediates the In Shade aging 6h of sample, and it is 0.253 that blank is measured its plasticity with KS-B micro computer plasticity measurement instrument; Finalized the design under 18 ℃ dry 24 hours after blank is put into single lead screw ex truding briquetting machine (die size is 4*4mm, wall thickness 1.5mm) extrusion modling, extrusion pressure is 10MPa; Carry out roasting after dry 2h in 100 ℃ of drying boxes, heating rate is 2 ℃/minute, rises to 550 ℃ of roasting 6h, obtains final products (accompanying drawing 1).The alveolate texture catalyst that makes is used for N
2The direct decomposition reaction of O, air speed are 6000h
-1, N in unstripped gas
2The concentration of O is 10%(V/V, and all the other are air), under this operating condition, N
2The minimum temperature of O100% conversion ratio is 450 ℃.
Embodiment 2
Putting into mixer after 135.59g Fe-MCM-22 molecular sieve (wherein Fe ion account for the mass percent of modified molecular screen be 1.5%) is pulverized and sieved together with 30.61g alundum (Al2O3), 4.125g sesbania powder, 3g polyvinyl alcohol evenly mixes; Adding concentration is that 9% aqueous tartaric acid solution 100g mediates, and mediates the In Shade aging 10h of sample, and it is 0.179 that blank is measured its plasticity with KS-B micro computer plasticity measurement instrument; Finalized the design dry 36 hours after blank is put into single lead screw ex truding briquetting machine (die size is aperture 1.5*1.5mm, wall thickness 1.5mm) extrusion modling, extrusion pressure is 30MPa; Carry out roasting after dry 2h in 150 ℃ of drying boxes, heating rate is 2 ℃/minute, rises to 550 ℃ of roasting 4h, obtains final products.The alveolate texture catalyst that makes is used for N
2The direct decomposition reaction of O, air speed are 6000h
-1, N in unstripped gas
2The concentration of O is 10%(V/V, and all the other are air), under this operating condition, N
2The minimum temperature of O100% conversion ratio is 475 ℃.
Embodiment 3
Putting into mixer after 127.12g Fe-beta-molecular sieve (wherein Fe ion account for the mass percent of modified molecular screen be 2.5%) is pulverized and sieved together with 38.27g boehmite, 3.75g sesbania powder, 4.5g cellulose evenly mixes; Adding concentration is that 10% aqueous citric acid solution 100g mediates, and mediates the In Shade aging 4h of sample, and it is 0.349 that blank is measured its plasticity with KS-B micro computer plasticity measurement instrument; Finalized the design dry 48 hours after blank is put into single lead screw ex truding briquetting machine (die size is aperture 2*2mm, wall thickness 1.5mm) extrusion modling, extrusion pressure is 30MPa; Carry out roasting after dry 2h in 150 ℃ of drying boxes, heating rate is 4 ℃/minute, rises to 550 ℃ of roasting 10h, obtains final products.The alveolate texture catalyst that makes is used for N
2The direct decomposition reaction of O, air speed are 6000h
-1, N in unstripped gas
2The concentration of O is 10%(V/V, and all the other are air), under this operating condition, N
2The minimum temperature of O100% conversion ratio is 455 ℃.
Embodiment 4
With 118gCo-ZSM-5 molecular sieve (wherein Co ion account for the mass percent of modified molecular screen be 1.5%), 45.92g boehmite, 3.75g sesbania powder, concentration be 9% aqueous solution of nitric acid 100g according to preparation alveolate texture catalyst in embodiment 1, its plasticity is 0.256; The alveolate texture catalyst that makes is used for N
2The direct decomposition reaction of O, air speed are 4000h
-1, N in unstripped gas
2The concentration of O is 10%(V/V, and all the other are air), under this operating condition, N
2The minimum temperature of O100% conversion ratio is 480 ℃.
Embodiment 5
With 135gCo-beta-molecular sieve (wherein Co ion account for the mass percent of modified molecular screen be 2.0%), 30.61g boehmite, 4.125g sesbania powder, 3g polyethylene glycol, concentration be 12% aqueous citric acid solution 100g according to preparation alveolate texture catalyst in embodiment 1, its plasticity is 0.185; The alveolate texture catalyst that makes is used for N
2The direct decomposition reaction of O, air speed are 6000h
-1, N in unstripped gas
2The concentration of O is 10%(V/V, and all the other are air), under this operating condition, N
2The minimum temperature of O100% conversion ratio is 468 ℃.
Embodiment 6
With 127.12gCo-beta-molecular sieve (wherein Co ion account for the mass percent of modified molecular screen be 2.5%), 38.27g aluminic acid, 4.5g sesbania powder, 4.5g urea, concentration be 15% aqueous solution of nitric acid 100g according to preparation alveolate texture catalyst in embodiment 1, its plasticity is 0.265; The alveolate texture catalyst that makes is used for N
2The direct decomposition reaction of O, air speed are 6000h
-1, N in unstripped gas
2The concentration of O is 10%(V/V, and all the other are air), under this operating condition, N
2The minimum temperature of O100% conversion ratio is 475 ℃.
Claims (4)
1. N
2O decomposes with integral honeycomb shape molecular sieve catalyst preparation method, it is characterized in that:
Granularity is fully mixed less than 100 purpose active molecular sieve components and adhesive, active molecular sieve and adhesive mass ratio are 2:1-4:1, add extrusion aid, and extrusion aid is take active molecular sieve and adhesive total amount as benchmark, mass content is 2.5-3%, and the mass content benchmark of below mentioning is same; The pore creating material mass content is 0-3%, evenly mixes in mixer; The active molecular sieve component is the molecular sieve of Fe or Co modification; Molecular sieve is beta-molecular sieve, ZSM-5 molecular sieve or MCM-22 molecular sieve; Fe or Co account for the 1-3% of molecular sieve gross mass;
Mixed powder and peptizing agent and water are put into kneader mediate and make blank, the peptizing agent mass content is that 6-10%, water quality content are 50-60%; The blank that makes is sealed in temperature with plastic sheeting aging less than carrying out in the environment of 25 ℃, ageing time is 4-10h; Then put into the extrusion shaping machine extrusion modling, extrusion pressure is 10-30MPa; The green honeycomb body that makes is placed under 18-25 ℃ the dry 24-48h of typing, then puts it into and carry out drying in drying box, baking temperature is 100-150 ℃, and be 1-2h drying time; At last in 550 ℃ of lower roasting 4-10h.
2. a kind of N according to claim 1
2O decomposes with integral honeycomb shape molecular sieve catalyst preparation method, it is characterized in that:
Adhesive is boehmite, one or more in alundum (Al2O3), aluminic acid.
3. a kind of N according to claim 1
2O decomposes with integral honeycomb shape molecular sieve catalyst preparation method, it is characterized in that:
Described peptizing agent is one or more in nitric acid, tartaric acid, citric acid.
4. a kind of N according to claim 1
2O decomposes with integral honeycomb shape molecular sieve catalyst preparation method, it is characterized in that:
Described pore creating material is one or more of polyvinyl alcohol, cellulose, urea, polyethylene glycol.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506129A (en) * | 2013-09-17 | 2014-01-15 | 北京石油化工学院 | Preparation method of direct N2O catalytic decomposition catalyst |
| CN103506128A (en) * | 2013-09-17 | 2014-01-15 | 北京石油化工学院 | Formed catalyst for directly catalyzing N2O to decompose and manufacturing method thereof |
| CN105618159A (en) * | 2015-12-21 | 2016-06-01 | 北京化工大学 | Forming method of integral cellular molecular sieve based catalyst |
| CN106512997A (en) * | 2016-10-13 | 2017-03-22 | 北京石油化工学院 | Industrial catalyst for direct catalytic decomposition of N2O, and preparation method thereof |
| CN106964394A (en) * | 2017-04-26 | 2017-07-21 | 武汉理工大学 | It is a kind of for bar shaped iron-based molecular sieve catalyst of denitrating flue gas and preparation method thereof |
| CN107297219A (en) * | 2017-07-10 | 2017-10-27 | 武汉理工大学 | The preparation method of the catalyst of Cu ZSM 5 without sial binder |
| CN107497436A (en) * | 2017-09-11 | 2017-12-22 | 北京化工大学 | It is catalyzed N2NiO hollow ball catalysts that O is directly decomposed and its preparation method and application |
| CN108421558A (en) * | 2018-04-04 | 2018-08-21 | 武汉理工大学 | A kind of bar shaped manganese-based catalyst and preparation method thereof for NO catalysis oxidations |
| CN110947416A (en) * | 2019-12-18 | 2020-04-03 | 武汉科技大学 | For NH3-SCR iron/molecular sieve catalyst, preparation method and application thereof |
| CN109603904B (en) * | 2018-12-14 | 2020-07-24 | 北京化工大学 | Preparation and application of high-efficiency adipic acid flue gas purification catalyst |
| CN113019430A (en) * | 2021-03-11 | 2021-06-25 | 北京工业大学 | Molecular sieve monolithic catalyst, preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204665A (en) * | 2006-12-21 | 2008-06-25 | 中国科学院生态环境研究中心 | Integral type catalyst decomposing nitrous oxide and preparation method thereof |
| CN101628241A (en) * | 2009-08-11 | 2010-01-20 | 广东工业大学 | Monolithic catalyst for dimethyl ether catalytic combustion and preparation method and application thereof |
| CN101925405A (en) * | 2008-01-21 | 2010-12-22 | Sk能源株式会社 | Fabrication method of zeolite honeycomb type catalyst for reducing nitrogen oxide |
| CN102316962A (en) * | 2008-07-11 | 2012-01-11 | 荷兰能源建设基金中心 | Method for the decomposition of N2O, catalyst for it, and the preparation of this catalyst |
| WO2012032325A1 (en) * | 2010-09-08 | 2012-03-15 | Johnson Matthey Public Limited Company | Catalyst manufacturing method |
-
2013
- 2013-02-03 CN CN2013100428128A patent/CN103111322A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204665A (en) * | 2006-12-21 | 2008-06-25 | 中国科学院生态环境研究中心 | Integral type catalyst decomposing nitrous oxide and preparation method thereof |
| CN101925405A (en) * | 2008-01-21 | 2010-12-22 | Sk能源株式会社 | Fabrication method of zeolite honeycomb type catalyst for reducing nitrogen oxide |
| CN102316962A (en) * | 2008-07-11 | 2012-01-11 | 荷兰能源建设基金中心 | Method for the decomposition of N2O, catalyst for it, and the preparation of this catalyst |
| CN101628241A (en) * | 2009-08-11 | 2010-01-20 | 广东工业大学 | Monolithic catalyst for dimethyl ether catalytic combustion and preparation method and application thereof |
| WO2012032325A1 (en) * | 2010-09-08 | 2012-03-15 | Johnson Matthey Public Limited Company | Catalyst manufacturing method |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506128A (en) * | 2013-09-17 | 2014-01-15 | 北京石油化工学院 | Formed catalyst for directly catalyzing N2O to decompose and manufacturing method thereof |
| CN103506129A (en) * | 2013-09-17 | 2014-01-15 | 北京石油化工学院 | Preparation method of direct N2O catalytic decomposition catalyst |
| CN105618159B (en) * | 2015-12-21 | 2017-12-15 | 北京化工大学 | A kind of integral honeycomb shape structuring forming method of molecular sieve catalyst |
| CN105618159A (en) * | 2015-12-21 | 2016-06-01 | 北京化工大学 | Forming method of integral cellular molecular sieve based catalyst |
| CN106512997A (en) * | 2016-10-13 | 2017-03-22 | 北京石油化工学院 | Industrial catalyst for direct catalytic decomposition of N2O, and preparation method thereof |
| CN106964394A (en) * | 2017-04-26 | 2017-07-21 | 武汉理工大学 | It is a kind of for bar shaped iron-based molecular sieve catalyst of denitrating flue gas and preparation method thereof |
| CN107297219A (en) * | 2017-07-10 | 2017-10-27 | 武汉理工大学 | The preparation method of the catalyst of Cu ZSM 5 without sial binder |
| CN107497436A (en) * | 2017-09-11 | 2017-12-22 | 北京化工大学 | It is catalyzed N2NiO hollow ball catalysts that O is directly decomposed and its preparation method and application |
| CN108421558A (en) * | 2018-04-04 | 2018-08-21 | 武汉理工大学 | A kind of bar shaped manganese-based catalyst and preparation method thereof for NO catalysis oxidations |
| CN109603904B (en) * | 2018-12-14 | 2020-07-24 | 北京化工大学 | Preparation and application of high-efficiency adipic acid flue gas purification catalyst |
| CN110947416A (en) * | 2019-12-18 | 2020-04-03 | 武汉科技大学 | For NH3-SCR iron/molecular sieve catalyst, preparation method and application thereof |
| CN110947416B (en) * | 2019-12-18 | 2023-06-13 | 武汉科技大学 | For NH 3 Iron/molecular sieve catalyst of SCR (selective catalytic reduction), and preparation method and application thereof |
| CN113019430A (en) * | 2021-03-11 | 2021-06-25 | 北京工业大学 | Molecular sieve monolithic catalyst, preparation method and application thereof |
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Application publication date: 20130522 |