CN102580734B - Monolithic catalyst for high-water-content acrylic acid waste gas purification and preparation method of monolithic catalyst - Google Patents
Monolithic catalyst for high-water-content acrylic acid waste gas purification and preparation method of monolithic catalyst Download PDFInfo
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- CN102580734B CN102580734B CN201210041171.XA CN201210041171A CN102580734B CN 102580734 B CN102580734 B CN 102580734B CN 201210041171 A CN201210041171 A CN 201210041171A CN 102580734 B CN102580734 B CN 102580734B
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Abstract
The invention discloses a monolithic catalyst for high-water-content acrylic acid waste gas purification and a preparation method of the monolithic catalyst. The preparation method comprises the steps of: loading rare earth oxide modified active aluminum oxide, cerium oxide and trace precious metal on the surface of a cordierite honeycomb ceramic carrier by adopting a once vacuum coating method to prepare a monolithic palladium catalyst; and then treating acrylic acid waste gas and methylacrylic acid tail gas with high water content through a catalytic combustion method by using the catalyst, and removing low-concentration organic pollutants in the waste gas so that emitted gas reaches the relevant atmospheric pollutant emission standard in China. The monolithic catalyst has the advantages of simple preparation process of the once vacuum coating method, short production period, low energy consumption and high load rate of the active coating, strong bonding force with the cordierite honeycomb ceramic carrier, and improved activity and stability because precious active components are uniformly dispersed in the aluminum oxide active coating.
Description
Technical field
The present invention relates to a kind of monoblock type palladium catalyst for high-moisture acrylic acid waste gas catalytic combustion and preparation method thereof, specifically, with a vacuum coat method by the activated alumina of rare-earth oxide modified, cerium oxide and minute amount of noble metal palladium load to cordierite honeycomb ceramic carrier surface, prepare a kind of monoblock type palladium catalyst, then utilize this catalyst to process acrylic acid waste gas and the methacrylic acid tail gas of high-moisture by the method for catalytic combustion, remove the light concentration organic pollutant in waste gas, make emission gases reach the atmosphere pollutants emission standards that China is relevant.
Background technology
Acrylic acid is important Organic Chemicals, occupy considerable status in field of fine chemical, be mainly used to produce esters of acrylic acid (resin) industrial, 60% left and right that accounts for acrylic acid aggregate consumption, is applied to the fields such as building, papermaking, leather, weaving, plastic processing, packaging material, daily-use chemical industry, water treatment, oil recovery, metallurgy.The industrial installation that new (expansion) builds after the eighties in 20th century adopts propylene two-step oxidizing process to account for 95%, and China's acrylic acid production device all adopts propylene two-step oxidizing process to produce acrylic acid.So-called propylene two-step oxidizing process is under metal composite oxide catalyst exists, and first generates methacrylaldehyde through air oxidation, and then further Catalytic Oxygen changes into acrylic acid.
Propylene two-step oxidizing process is produced in acrylic acid process, behind reaction, absorption and purification operations unit, can produce acrylic acid waste gas, acrylic acid waste gas complicated component, there are the poisonous and hazardous VOCs (VOCs) such as toluene, ethanol, ethene, acetaldehyde, propane, propylene, butylene, acetic acid, acrylic acid, methacrylaldehyde, acetone and carbon monoxide, wherein water content is up to 25wt%, if directly discharge will serious harm public health and ecological environment.Therefore, eliminate the VOCs in acrylic acid waste gas with catalytic combustion method, make emission gases reach the atmosphere pollutants emission standards that China is relevant, for improving people's living standard and the important realistic meaning of preserving the ecological environment.
Cordierite honeycomb ceramic, due to advantages such as the well-regulated pore passage structure of tool, thermally-stabilised good, cheap, machine-shaping are convenient, is the custom catalysts carrier for VOCs catalytic combustion.Compared with pellet type catalyst, integral catalyzer has the following advantages: (1) low pressure drop, the Pressure Drop of integral catalyzer is than low 2～3 orders of magnitude of pellet type catalyst, even under high gas flow rate, also can reach lower Pressure Drop, and not affect mass transfer and transformation efficiency; (2) unit reactor volumentary geometry surface area maximum; (3) reaction is not subject to the restriction of external diffusion in particle; (4) there is not radial mass transfer or heat transfer; (5) reactor shape is not subject to the restriction of catalyst external shape; (6) handling of catalyst, replacing operate more easy.
Due to less (the < 1m of specific area of cordierite honeycomb ceramic
2/ g), noble metal active component Pt, Pd etc. are different from ceramic thermal coefficient of expansion, for uniform load noble metal better, generally need covering aluminum oxide coating on cordierite honeycomb ceramic in advance, and then carried noble metal active component.
Chinese invention patent CN1488435A discloses a kind of catalyst for catalytic combustion for organic waste-gas purification processing, is made up of block honeycomb ceramic carrier skeleton and the coating and the noble metal active component that apply on it.The preparation method of this catalyst for catalytic combustion comprises the following steps: the slurries preparation of (1) coating; (2) honeycomb substrate skeleton applying coating; (3) active metal component dipping, dry, roasting.This catalyst has the advantages that coating difficult drop-off, resistance to elevated temperatures are good, noble metal active component effective rate of utilization is high.The coating of catalyst is by Al
2o
3, SiO
2with the common composite oxides composition forming of one or more alkaline earth oxides, between coating and honeycomb ceramic carrier skeleton in conjunction with firm, use procedure floating coat difficult drop-off.Owing to comprising alkaline earth oxide and silica in coating ingredients, coating and catalyst have good resistance to elevated temperatures.Noble metal active component supports with infusion process, and its effective rate of utilization is high.
Chinese invention patent CN1415410A discloses a kind of catalyst for catalytic combustion for combustible waste gases catalytic combustion or catalytic oxidation and preparation method thereof.For solved in prior art the noble metal component utilization rate of catalyst for catalytic combustion low, disperse inhomogeneous problem, this invention adopts noble metal active component Pt to be distributed in the method for honeycomb ceramic carrier coating outer surface by organic acid competitive Adsorption with infusion process, and the coating composition of honeycomb ceramic carrier is by weight percentage: active A l
2o
320%～80%, TiO
210%～40%, CeO
25%～30%, ZrO
25%～20%, noble metal loading is that every liter of catalyst is containing 0.5～4.0gPt.The preparation method of this catalyst is for taking by a certain percentage γ-Al
2o
3, TiO
2, CeO
2and ZrO
2raw material, adds distilled water to mix, and is modulated into moisture thin pulp, honeycomb ceramic carrier is flooded in this thin pulp, then blow the residual slurries in honeycomb body opening with compressed air, drying, roasting, finally will be containing organic acid platiniferous solution impregnation in honeycomb ceramic carrier coating surface.
Above-mentioned existing patented technology is all to adopt two-step method to prepare catalyst for catalytic combustion, i.e. elder generation's covering aluminum oxide coating on honeycomb ceramic carrier, after drying and roasting, then flood noble metal active component, after drying and roasting, just make catalyst, preparation process is loaded down with trivial details again, and production hour is long, energy consumption is large, has reduced production efficiency.And in the catalyst making like this, noble metal active component is all dispersed in the outer surface of catalyst, be not suitable for the catalytic combustion of the acrylic acid waste gas of high-moisture, due under high-moisture, high-speed and hot conditions, the steam of high temperature easily causes the loss of noble metal active component and aluminum oxide coating layer, has reduced activity and the service life of catalyst.
Summary of the invention
One of object of the present invention is, a kind of high-performance and long-life monoblock type palladium catalyst that is applicable to the acrylic acid waste gas catalytic combustion under high-moisture, high-speed and hot conditions is provided.
Two of object of the present invention is, a kind of preparation technology of a vacuum coat method that is applicable to the simple and efficient energy-saving of technique prepared by integral catalyzer is provided.
Catalyst of the present invention loads to cordierite honeycomb ceramic carrier surface with a vacuum coat method by the activated alumina of rare-earth oxide modified, cerium oxide and minute amount of noble metal palladium, the load factor of active coating is 15～25wt%, and the composition of active coating and weight percent content thereof are:
The Al of lanthana modification
2o
3content is 90.0～97.5%,
CeO
2content is 2.0～8.0%,
Pd content is 0.5～2.0%.
Monoblock type palladium catalyst of the present invention adopts a vacuum coat method preparation, comprises the steps:
1. under high speed machine stirring condition, the aluminium oxide of lanthana modification, boehmite, cerous nitrate and Polyethylene glycol-2000 are scattered in deionized water, after mixing, slurry adds palladium nitrate solution, and to regulate the pH value of slurry with appropriate red fuming nitric acid (RFNA) be 2～4, then continue stirring 0.5～2 hour;
Under vacuum condition with special vacuum coating apparatus, the above-mentioned alumina slurry mixing is evenly coated on cordierite honeycomb ceramic carrier, coating time is 15～60 minutes, then at 100～120 ℃, be dried 1～3 hour, at 550～750 ℃, roasting, after 3～5 hours, can be prepared monoblock type palladium catalyst;
The Al of described lanthana modification
2o
3the weight percent content of middle lanthana is 3.0～7.0%.
The process conditions of acrylic acid waste gas catalytic combustion are: water content is lower than 25wt%, and reaction temperature is 150～750 ℃, and reaction pressure is 0.1～0.5MPa, and air speed is 5000～20000h
-1.
The remarkable advantage of integral catalyzer of the present invention is, active coating adopts the aluminium oxide of lanthana modification to improve the high-temperature hydrothermal stability of catalyst, structural stability and the catalytic activity of noble metal active component have been improved with cerium oxide modification, reduce the production cost of noble metal dosage and catalyst, made it be applicable to the catalytic combustion of the acrylic acid waste gas under high-moisture, high-speed and hot conditions.
The preparation method's of integral catalyzer of the present invention remarkable advantage is, preparation process is simple, with short production cycle, energy consumption is low, the load factor of active coating is high, strong with cordierite honeycomb ceramic carrier adhesion, noble metal active component is dispersed in aluminium oxide active coating, has improved activity and the stability of catalyst.
The specific embodiment
Embodiment 1
Take aluminium oxide (lanthana content is 5wt%), 5g boehmite, 3.8g cerous nitrate and the 90mL deionized water of 50g lanthana modification, add in 250mL beaker, under the effect of stirring at high speed machine, slurry is mixed, then adding Pd content is the palladium nitrate solution of 0.25g, regulating the pH value of slurry with red fuming nitric acid (RFNA) is 2.5, continues to stir 30 minutes; Under vacuum condition with special vacuum coating apparatus, the above-mentioned alumina slurry mixing is evenly coated on the cordierite honeycomb ceramic carrier of Φ 17mm × 17mm, coating time is 15 minutes, then be dried 2 hours at 110 ℃, 550 ℃ of roastings are after 4 hours, and can obtain Pd content is the monoblock type palladium catalyst of 0.6g/L.
The activity rating of integral catalyzer carries out in atmospheric fixed bed reactor, the high-moisture acrylic acid waste gas of simulation consists of propylene (0.3wt%), acetic acid (0.197wt%), acrylic acid (0.297wt%), steam (25wt%), all the other are air, and air speed is 15000h
-1reaction temperature since 150 ℃ with 5 ℃/min temperature programming to 350 ℃, detect online after catalytic combustion propylene, acetic acid and acrylic acid content in air with 9790 gas chromatographs that Zhejiang Fu Li Analytical Instrument Co., Ltd produces, can obtain thus propylene, acetic acid and acrylic acid catalytic combustion properties curve.
Catalyst performance evaluation result is: the initiation temperature of catalyst is 234 ℃, and completing combustion temperature is 252 ℃.
Embodiment 2
Change 550 ℃ of sintering temperatures in embodiment 1 into 650 ℃, other processes are identical with embodiment 1.
Catalyst performance evaluation result is: the initiation temperature of catalyst is 229 ℃, and completing combustion temperature is 248 ℃.
Embodiment 3
Change 550 ℃ of sintering temperatures in embodiment 1 into 750 ℃, other processes are identical with embodiment 1.
Catalyst performance evaluation result is: the initiation temperature of catalyst is 231 ℃, and completing combustion temperature is 250 ℃.
Embodiment 4
Take aluminium oxide (lanthana content is 5wt%), 5g boehmite, 7.6g cerous nitrate, 0.55g Polyethylene glycol-2000 and the 90mL deionized water of 50g lanthana modification, add in 250mL beaker, under the effect of stirring at high speed machine, slurry is mixed, then adding Pd content is the palladium nitrate solution of 0.38g, regulating the pH value of slurry with red fuming nitric acid (RFNA) is 2.5, continues to stir 30 minutes; Under vacuum condition with special vacuum coating apparatus, the above-mentioned alumina slurry mixing is evenly coated on the cordierite honeycomb ceramic carrier of Φ 17mm × 17mm, coating time is 15 minutes, then be dried 2 hours at 110 ℃, 650 ℃ of roastings are after 4 hours, and can obtain Pd content is the monoblock type palladium catalyst of 0.6g/L.
Catalyst performance evaluation result is: the initiation temperature of catalyst is 220 ℃, and completing combustion temperature is 247 ℃.
The monoblock type palladium catalyst in enormous quantities that method for preparing catalyst according to the present embodiment is produced, be used for the catalytic combustion of the high-moisture acrylic acid waste gas of 40,000 t/a acrylic acid production devices, emission gases reaches the discharge standard of air pollutants (GB16297-1996) of China, is greater than 2 years service life.
Embodiment 5
Take aluminium oxide (lanthana content is 5wt%), 5g boehmite, 9.5g cerous nitrate, 0.55g Polyethylene glycol-2000 and the 90mL deionized water of 50g lanthana modification, add in 250mL beaker, under the effect of stirring at high speed machine, slurry is mixed, then adding Pd content is the palladium nitrate solution of 0.63g, regulating the pH value of slurry with red fuming nitric acid (RFNA) is 3～4, continues to stir 30 minutes; Under vacuum condition with special vacuum coating apparatus, the above-mentioned alumina slurry mixing is evenly coated on the cordierite honeycomb ceramic carrier of Φ 17mm × 17mm, coating time is 15 minutes, then be dried 2 hours at 110 ℃, 650 ℃ of roastings are after 4 hours, and can obtain Pd content is the monoblock type palladium catalyst of 1.0g/L.
The monoblock type palladium catalyst in enormous quantities that method for preparing catalyst according to the present embodiment is produced, be used for the catalytic combustion of the methacrylic acid tail gas of 2kt/a methacrylic acid process units, the completing combustion temperature of catalyst is lower than 200 ℃, emission gases reaches the discharge standard of air pollutants (GB16297-1996) of China, is greater than 2 years service life.
Claims (3)
1. the monoblock type palladium catalyst for high-moisture acrylic acid waste gas catalytic combustion, it is characterized in that, the activated alumina of rare-earth oxide modified, cerium oxide and precious metal palladium are loaded to cordierite honeycomb ceramic carrier surface with a vacuum coat method, the load factor of active coating is 15～25wt%, and the composition of active coating and weight percent content thereof are:
The Al of lanthana modification
2o
390.0～97.5%,
CeO
2 2.0～8.0％，
Pd 0.5～2.0％，
The wherein Al of lanthana modification
2o
3the weight percent content of middle lanthana is 3.0～7.0%;
A described vacuum coat method, specifically comprises the steps:
Under high speed machine stirring condition, the aluminium oxide of lanthana modification, boehmite, cerous nitrate and Polyethylene glycol-2000 are scattered in deionized water, after mixing, slurry adds palladium nitrate solution, and to regulate the pH value of slurry with appropriate red fuming nitric acid (RFNA) be 2～4, then continue stirring 0.5～2 hour; Under vacuum condition with special vacuum coating apparatus, the above-mentioned alumina slurry mixing is evenly coated on cordierite honeycomb ceramic carrier, coating time is 15～60 minutes, then at 100～120 ℃, be dried 1～3 hour, at 550～750 ℃, roasting, after 3～5 hours, can be prepared monoblock type palladium catalyst.
2. monoblock type palladium catalyst according to claim 1, for the catalytic combustion of high-moisture acrylic acid waste gas, it is characterized in that, the process conditions of acrylic acid waste gas catalytic combustion are: water content is lower than 25wt%, reaction temperature is 150～750 ℃, reaction pressure is 0.1～0.5MPa, and air speed is 5000～20000h
-1.
3. monoblock type palladium catalyst according to claim 1, is characterized in that, can be used for the catalytic combustion of methacrylic acid tail gas.
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| CN112156777B (en) * | 2020-10-27 | 2023-08-01 | 西安凯立新材料股份有限公司 | Honeycomb-shaped integral noble metal catalyst and application thereof in purifying acrylic acid waste gas |
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| CN115591548B (en) * | 2022-09-20 | 2024-03-19 | 镇江华东电力设备制造厂有限公司 | Efficient Pt/Pd double-noble metal catalyst for low-temperature oxidation of low-calorific-value VOCs and preparation method thereof |
| CN115869944A (en) * | 2022-11-29 | 2023-03-31 | 江苏优尚环境工程有限公司 | Catalytic oxidation catalyst applied to high-moisture environment and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075276A (en) * | 1988-04-30 | 1991-12-24 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Catalyst for purification of exhaust gases |
| CN1453073A (en) * | 2002-04-26 | 2003-11-05 | 中国石油化工股份有限公司 | Method of loading automobile tail gas purifying catalyst onto honeycomb carrier |
| CN1903413A (en) * | 2005-07-27 | 2007-01-31 | 上海东化环境工程有限公司 | Process for treating waste-gas contg. acrylic acid |
| CN1954916A (en) * | 2006-10-16 | 2007-05-02 | 华东理工大学 | Preparation method of active coating of integral catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100544818C (en) * | 2005-12-23 | 2009-09-30 | 天津化工研究设计院 | A kind of preparation method of rare earth based tail gas purifying catalyst of motorcycle |
-
2012
- 2012-02-22 CN CN201210041171.XA patent/CN102580734B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075276A (en) * | 1988-04-30 | 1991-12-24 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Catalyst for purification of exhaust gases |
| CN1453073A (en) * | 2002-04-26 | 2003-11-05 | 中国石油化工股份有限公司 | Method of loading automobile tail gas purifying catalyst onto honeycomb carrier |
| CN1903413A (en) * | 2005-07-27 | 2007-01-31 | 上海东化环境工程有限公司 | Process for treating waste-gas contg. acrylic acid |
| CN1954916A (en) * | 2006-10-16 | 2007-05-02 | 华东理工大学 | Preparation method of active coating of integral catalyst |
Non-Patent Citations (3)
| Title |
|---|
| 第2页第6段 |
| 第3页第3段. |
| 说明书第3页第6段. |
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