CN107930624B - Composite catalyst for catalytic combustion of ethyl acetate and preparation method and application thereof - Google Patents

Composite catalyst for catalytic combustion of ethyl acetate and preparation method and application thereof Download PDF

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CN107930624B
CN107930624B CN201711236987.7A CN201711236987A CN107930624B CN 107930624 B CN107930624 B CN 107930624B CN 201711236987 A CN201711236987 A CN 201711236987A CN 107930624 B CN107930624 B CN 107930624B
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CN107930624A (en
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刘程
李飞
仵静
李潇
侯鑫
满雪
黄伟
庞菊玲
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Xi'an Origin Chemical Technologies Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002—Mixed oxides other than spinels, e.g. perovskite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/63—Platinum group metals with rare earths or actinides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/14—Gaseous waste or fumes

Abstract

The invention provides a composite catalyst for catalyzing and combusting ethyl acetate, which uses Al as the catalyst2O3As a carrier, metal Pd is used as an active component, and the mass of the metal Pd is Al2O30.1-0.5% of the mass, and the composite non-noble metal oxide is taken as an auxiliary agent and is made of CeO2And SnO2Is compounded with CeO2‑SnO2，CeO2Is Al in mass2O35% by mass of SnO2Is Al in mass2O34 to 20 percent of the mass. The invention also provides a method for preparing the catalyst and a method for carrying out catalytic combustion on ethyl acetate by using the catalyst. The catalyst of the invention takes the compound non-noble metal oxide as an auxiliary agent, the auxiliary agent can increase the active oxygen content on the surface of the catalyst and improve the activity of the catalyst, and the auxiliary agent has higher thermal stability and can quickly and efficiently eliminate the ethyl acetate in the industrial tail gas.

Description

Composite catalyst for catalytic combustion of ethyl acetate and preparation method and application thereof
Technical Field
The invention belongs to the technical field of catalysts, and particularly relates to a composite catalyst for catalytic combustion of ethyl acetate, and a preparation method and application thereof.
Background
Ethyl acetate is a volatile organic compound, has great harm to the ecological environment and human health, and is widely produced in the production processes of petrochemical industry, printing, pharmacy and the like. In recent years, a plurality of regulations have been provided in China to assist in the treatment of Volatile Organic Compounds (VOCs), and catalysts generally used for ethyl acetate catalytic combustion are mainly divided into two categories: noble metals such as Pt, Pd, Rh, etc., and non-noble metal oxides such as calcium iron ore, hexaaluminate, complex metal oxides, etc. Among them, although the noble metal catalyst has a good low-temperature activity, it is very easy to deactivate in the presence of water vapor and sulfur dioxide, which severely restricts the industrial application of the noble metal catalyst. Therefore, it is of great value to develop a noble metal catalyst for the catalytic combustion of ethyl acetate.
Among non-noble metal oxide materials, the perovskite-type and hexaaluminate catalysts have improved stability compared to noble metals, but generally have low-temperature activity, and thus are generally used for catalytic combustion reactions of high-concentration methane, toluene, and the like. Transition metal oxides such as copper oxide, manganese oxide, etc. are often used in the field of ethyl acetate catalytic combustion, and have excellent catalytic activity at a low temperature stage. We found earlier that tin dioxide and cerium dioxide have abundant surface active oxygen. Therefore, the patent tries to combine the noble metal catalyst with noble metal to form a composite noble metal catalyst, and improves the water resistance and the sulfur resistance of the catalyst.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a composite catalyst for catalyzing and combusting ethyl acetate, aiming at the defects of the prior art. The catalyst can quickly and efficiently eliminate the ethyl acetate in the industrial tail gas.
In order to solve the technical problems, the invention adopts the technical scheme that: the composite catalyst for catalytic combustion of ethyl acetate is characterized in that Al is used as the composite catalyst2O3As a carrier to carry Al2O3The metal Pd is an active component, and the mass of the metal Pd is Al2O30.1-0.5% of the mass of Al2O3The compound non-noble metal oxide is auxiliary agent, and the compound non-noble metal oxide is formed by CeO2And SnO2Formed by compounding the CeO2Is the mass of Al2O35% by mass of the SnO2Is the mass of Al2O34 to 20 percent of the mass.
The composite catalyst for catalytic combustion of ethyl acetate is characterized in that SnO2Is the mass of Al2O38 to 16 percent of the mass.
The composite catalyst for catalytic combustion of ethyl acetate is characterized in that SnO2Is the mass of Al2O312% by mass.
In addition, the invention also provides a method for preparing the composite catalyst, which is characterized by comprising the following steps:
step one, Ce (NO)3)3·6H2O and SnCl4Adding 300m L deionized water, stirring uniformly, adding 10m L mass concentration 68% nitric acid, fully dissolving, and adding 5g Al2O3Uniformly stirring the powder to obtain a suspension A;
step two, dripping 10m L palladium nitrate solution into the suspension A obtained in the step one at the speed of 1 drop/second, and uniformly stirring to obtain a suspension B, wherein each liter of the palladium nitrate solution contains 1g of metal palladium;
step three, stirring the suspension B in the step two, dripping ammonia water with the mass concentration of 28% in the stirring process, adjusting the pH value of the suspension B to 9, and then filtering to obtain a precipitate;
step four, placing the precipitate obtained in the step three in a drying oven, and drying for 18 hours at the temperature of 120 ℃;
and step five, placing the precipitate dried in the step four into a muffle furnace, heating to 650 ℃ at the heating rate of 6 ℃/min, and then preserving heat for 6 hours for roasting treatment to obtain the catalyst for catalyzing and burning the ethyl acetate.
In addition, the invention also provides a method for carrying out catalytic combustion on ethyl acetate by using the composite catalyst, which is characterized by comprising the following steps: filling the catalyst into a reactor, heating to 100-400 ℃, keeping the temperature constant, and then, carrying out 80000h-1Continuously introducing ethyl acetate, steam and SO into the reactor at the mass space velocity2The mixed gas of (3) is subjected to combustion decomposition of ethyl acetate in the mixed gas under the catalysis of a catalyst to produce carbon dioxide and water.
The method is characterized in that the mixed gas comprises the following components in percentage by volume: 0.5% of ethyl acetate, O 220%, water vapor 5%, SO2500ppm, balance N2。
The method is characterized in that the catalyst filled in the reactor is a strip catalyst prepared by a strip extruding machine, and the length of the catalyst is 3 cm-5 cm.
Compared with the prior art, the invention has the following advantages:
1. the catalyst of the invention is made of Al2O3As a carrier to carry Al2O3The metal Pd is used as an active component to be loaded on Al2O3CeO of2-SnO2The compound non-noble metal oxide is an auxiliary agent, and the auxiliary agent can increase the active oxygen content on the surface of the catalyst and improve the activity of the catalyst. In addition, compared with the traditional transition metal oxide auxiliary agent, the auxiliary agent has higher thermal stability and lower cost.
2. Conventional catalytic combustion catalysts in the presence of H2O and SO2The catalyst can remove ethyl acetate at lower temperature and is suitable for H-containing2O and SO2The operating conditions of (1).
3. The invention reduces the content of noble metal oxide in the catalyst, can greatly reduce the cost and represents Pd/Al which is wider than the industrial application2O3The noble metal catalyst has higher catalytic activity and extremely strong commercial application prospect.
4. The preparation and application methods of the catalyst are simple, easy to repeat and free of pollution, and the catalyst is beneficial to industrial popularization and application and has excellent low-temperature activity and thermal stability.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 shows composite catalysts prepared in examples 1 to 5 of the present invention and Pd/Al prepared in comparative example 12O3The noble metal catalyst is applied to a curve chart of the temperature rise reaction of catalytic combustion ethyl acetate.
Detailed Description
Example 1
This example is used for catalytic combustion of ethyl acetate compound catalyst with Al2O3As a carrier, noble metal Pd is used as an active component, and the mass of the metal Pd is Al2O30.2% by mass of Al2O3The compound non-noble metal oxide is auxiliary agent, and the compound non-noble metal oxide is formed by CeO2And SnO2Is compounded with CeO2-SnO2The said CeO2Is the mass of Al2O35% by mass of the SnO2Is the mass of Al2O34% of the mass;
the preparation method of the composite catalyst comprises the following steps:
step one, taking a clean beaker with the volume of 500m L, adding deionized water with the volume of 300m L, and then weighing 0.63g of Ce (NO) according to the design requirement3)3·6H2O and 0.46g SnCl4Adding 10m of L mass percent nitric acid after stirring uniformly, then placing the mixture in an ultrasonic oscillator for ultrasonic oscillation for 0.5h, and then adding 5g of Al into a beaker2O3Uniformly stirring the powder to obtain a suspension A;
step two, dripping 10m L palladium nitrate solution into the suspension A obtained in the step one at the speed of 1 drop/second, and uniformly stirring to obtain a suspension B, wherein each liter of the palladium nitrate solution contains 1g of metal palladium;
step three, stirring the suspension B in the step two, dripping ammonia water with the mass concentration of 28% in the stirring process, adjusting the pH value of the suspension B to 9, and then filtering to obtain a precipitate;
step four, placing the precipitate obtained in the step three in a drying oven, and drying for 18 hours at the temperature of 120 ℃;
and step five, placing the precipitate dried in the step four into a muffle furnace, heating to 650 ℃ at the heating rate of 6 ℃/min, and then preserving heat for 6 hours for roasting treatment to obtain the catalyst for catalyzing and burning the ethyl acetate.
Example 2
This example is used for catalytic combustion of ethyl acetate compound catalyst with Al2O3As a carrier, noble metal Pd is used as an active component, and the mass of the metal Pd is Al2O30.2% by mass of Al2O3The compound non-noble metal oxide is auxiliary agent, and the compound non-noble metal oxide is formed by CeO2And SnO2Is compounded with CeO2-SnO2The said CeO2Is the mass of Al2O35% by mass of the SnO2Is the mass of Al2O38% of the mass;
the preparation method of the composite catalyst comprises the following steps:
step one, taking a clean beaker with the volume of 500m L, adding deionized water with the volume of 300m L, and then weighing 0.63g of Ce (NO) according to the design requirement3)3·6H2O and 0.92g SnCl4Adding 10m of L mass percent nitric acid after stirring uniformly, then placing the mixture in an ultrasonic oscillator for ultrasonic oscillation for 0.5h, and then adding 5g of Al into a beaker2O3Uniformly stirring the powder to obtain a suspension A;
step two, dripping 10m L palladium nitrate solution into the suspension A obtained in the step one at the speed of 1 drop/second, and uniformly stirring to obtain a suspension B, wherein each liter of the palladium nitrate solution contains 1g of metal palladium;
step three, stirring the suspension B in the step two, dripping ammonia water with the mass concentration of 28% in the stirring process, adjusting the pH value of the suspension B to 9, and then filtering to obtain a precipitate;
step four, placing the precipitate obtained in the step three in a drying oven, and drying for 18 hours at the temperature of 120 ℃;
and step five, placing the precipitate dried in the step four into a muffle furnace, heating to 650 ℃ at the heating rate of 6 ℃/min, and then preserving heat for 6 hours for roasting treatment to obtain the catalyst for catalyzing and burning the ethyl acetate.
Example 3
This example is used for catalytic combustion of ethyl acetate compound catalyst with Al2O3As a carrier, noble metal Pd is used as an active component, and the mass of the metal Pd is Al2O30.5% by mass of Al2O3The compound non-noble metal oxide is auxiliary agent, and the compound non-noble metal oxide is formed by CeO2And SnO2Is compounded with CeO2-SnO2The said CeO2Is the mass of Al2O35% by mass of the SnO2Is the mass of Al2O312% of the mass;
the preparation method of the composite catalyst comprises the following steps:
step one, taking a clean beaker with the volume of 500m L, adding deionized water with the volume of 300m L, and then weighing 0.63g of Ce (NO) according to the design requirement3)3·6H2O and 1.38g SnCl4Adding 10m of L mass percent nitric acid after stirring uniformly, then placing the mixture in an ultrasonic oscillator for ultrasonic oscillation for 0.5h, and then adding 5g of Al into a beaker2O3Uniformly stirring the powder to obtain a suspension A;
step two, dripping 10m L palladium nitrate solution into the suspension A obtained in the step one at the speed of 1 drop/second, and uniformly stirring to obtain a suspension B, wherein each liter of the palladium nitrate solution contains 1g of metal palladium;
step three, stirring the suspension B in the step two, dripping ammonia water with the mass concentration of 28% in the stirring process, adjusting the pH value of the suspension B to 9, and then filtering to obtain a precipitate;
step four, placing the precipitate obtained in the step three in a drying oven, and drying for 18 hours at the temperature of 120 ℃;
and step five, placing the precipitate dried in the step four into a muffle furnace, heating to 650 ℃ at the heating rate of 6 ℃/min, and then preserving heat for 6 hours for roasting treatment to obtain the catalyst for catalyzing and burning the ethyl acetate.
Example 4
This example is used for catalytic combustion of ethyl acetate compound catalyst with Al2O3As a carrier, noble metal Pd is used as an active component, and the mass of the metal Pd is Al2O30.2% by mass of Al2O3The compound non-noble metal oxide is auxiliary agent, and the compound non-noble metal oxide is formed by CeO2And SnO2Is compounded with CeO2-SnO2The said CeO2Is the mass of Al2O35% by mass of the SnO2Is the mass of Al2O316% of the mass;
the preparation method of the composite catalyst comprises the following steps:
step one, taking a clean beaker with the volume of 500m L, adding deionized water with the volume of 300m L, and then weighing 0.63g of Ce (NO) according to the design requirement3)3·6H2O and 1.84g SnCl4Adding 10m of L mass percent nitric acid after stirring uniformly, then placing the mixture in an ultrasonic oscillator for ultrasonic oscillation for 0.5h, and then adding 5g of Al into a beaker2O3Uniformly stirring the powder to obtain a suspension A;
step two, dripping 10m L palladium nitrate solution into the suspension A obtained in the step one at the speed of 1 drop/second, and uniformly stirring to obtain a suspension B, wherein each liter of the palladium nitrate solution contains 1g of metal palladium;
step three, stirring the suspension B in the step two, dripping ammonia water with the mass concentration of 28% in the stirring process, adjusting the pH value of the suspension B to 9, and then filtering to obtain a precipitate;
step four, placing the precipitate obtained in the step three in a drying oven, and drying for 18 hours at the temperature of 120 ℃;
and step five, placing the precipitate dried in the step four into a muffle furnace, heating to 650 ℃ at the heating rate of 6 ℃/min, and then preserving heat for 6 hours for roasting treatment to obtain the catalyst for catalyzing and burning the ethyl acetate.
Example 5
This example is used for catalytic combustion of ethyl acetate compound catalyst with Al2O3As a carrier, noble metal Pd is used as an active component, and the mass of the metal Pd is Al2O30.1% by mass of Al2O3The compound non-noble metal oxide is auxiliary agent, and the compound non-noble metal oxide is formed by CeO2And SnO2Is compounded with CeO2-SnO2The said CeO2Is the mass of Al2O35% by mass of the SnO2Is the mass of Al2O320% of the mass;
the preparation method of the composite catalyst comprises the following steps:
step one, taking a clean beaker with the volume of 500m L, adding deionized water with the volume of 300m L, and then weighing 0.63g of Ce (NO) according to the design requirement3)3·6H2O and 2.3g SnCl4Adding 10m of L mass percent nitric acid after stirring uniformly, then placing the mixture in an ultrasonic oscillator for ultrasonic oscillation for 0.5h, and then adding 5g of Al into a beaker2O3Uniformly stirring the powder to obtain a suspension A;
step two, dripping 10m L palladium nitrate solution into the suspension A obtained in the step one at the speed of 1 drop/second, and uniformly stirring to obtain a suspension B, wherein each liter of the palladium nitrate solution contains 1g of metal palladium;
step three, stirring the suspension B in the step two, dripping ammonia water with the mass concentration of 28% in the stirring process, adjusting the pH value of the suspension B to 9, and then filtering to obtain a precipitate;
step four, placing the precipitate obtained in the step three in a drying oven, and drying for 18 hours at the temperature of 120 ℃;
and step five, placing the precipitate dried in the step four into a muffle furnace, heating to 650 ℃ at the heating rate of 6 ℃/min, and then preserving heat for 6 hours for roasting treatment to obtain the catalyst for catalyzing and burning the ethyl acetate.
Comparative example 1
The catalyst provided by the comparative example is Pd/Al2O3The noble metal catalyst is obtained by a purchased or self-made method, wherein the self-made method is an equivalent impregnation method, and the specific process comprises the following steps: weighing 18.46% Pd (NO)3)30.5291g of solution in weighed Pd (NO)3)33m L is added into the solution for deionization, and the diluted Pd (NO) is added3)3The solution was added dropwise to 4.1g of gamma-Al2O3Applying ultrasonic wave to the powder for 10min, standing for 24h, drying in a forced air drying oven at 80 deg.C for 12h, heating from room temperature to 650 deg.C at a heating rate of 5 deg.C/min in a muffle furnace, and calcining at 650 deg.C for 4h to obtain Pd/Al2O3Taking a clean beaker of 100m L, adding 50m L for deionization, performing ultrasonic treatment for 10min, standing for 24h, drying at 80 ℃ in a blast drying oven for 12h, then heating from room temperature to 650 ℃ in a muffle furnace at the heating rate of 5 ℃/min, and roasting at 650 ℃ for 4h to obtain Pd/Al2O3A catalyst.
The composite catalyst prepared in examples 1 to 5 and the Pd/Al prepared in comparative example 12O3The noble metal catalyst is used for a test of catalytic combustion of ethyl acetate and for evaluating the catalytic performance of the catalyst, and the specific test process comprises the following steps: firstly, the composite catalyst prepared in the examples 1 to 5 and the Pd/Al prepared in the comparative example 1 are mixed2O3The noble metal catalyst is respectively made into strip catalysts with the length of 3 cm-5 cm by a strip extruding machine, then the strip catalysts are respectively filled in a reactor, and the reaction time is 80000h-1The mass space velocity of (A) is introduced into the reactorThe resultant gas was subjected to a catalytic combustion experiment. The mixed gas comprises the following components in percentage by volume: 0.5% of ethyl acetate, O 220%, water vapor 5%, SO2500ppm, balance N2. Under the condition of temperature of 100-400 ℃, recording the conversion rate every 30 ℃, keeping each temperature point for 30min to stabilize the activity of the catalyst, detecting the concentration of the ethyl acetate by adopting a gas chromatograph, and drawing the detected data into a curve chart as shown in figure 1. FIG. 1 shows composite catalysts prepared in examples 1 to 5 of the present invention and Pd/Al prepared in comparative example 12O3The noble metal catalyst is applied to the graph of the temperature-rising reaction of catalyzing and burning the ethyl acetate, and the conversion rate of the ethyl acetate under the action of the catalyst is improved along with the rise of the reaction temperature as can be seen from the graph in FIG. 1. As can be seen from fig. 1, the reaction temperature of the composite catalyst prepared according to the present invention is lower at the same conversion rate as compared to comparative example 1, which indicates that the composite catalyst prepared according to the present invention has higher activity and is expected to replace the noble metal catalyst commercialized in comparative example 1. To quantitatively examine the performance of the catalyst, the temperature at which 50% conversion of ethyl acetate is achieved is generally referred to as the initial combustion temperature T50，T50The lower the catalyst activity, the better.
Table 1 composite catalysts prepared in examples 1 to 5 and Pd/Al prepared in comparative example 12O3Initial combustion temperature T of noble metal catalyst50
Figure BDA0001489168820000091
As can be seen from Table 1, the present invention has a lower T than comparative example 150Thus, the catalyst of the invention has better catalytic activity.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.

Claims (7)

1. The composite catalyst for catalytic combustion of ethyl acetate is characterized in that Al is used as the composite catalyst2O3As a carrier to carry Al2O3The metal Pd is an active component, and the mass of the metal Pd is Al2O30.1-0.5% of the mass of Al2O3The compound non-noble metal oxide is auxiliary agent, and the compound non-noble metal oxide is formed by CeO2And SnO2Is compounded with CeO2-SnO2The said CeO2Is the mass of Al2O35% by mass of the SnO2Is the mass of Al2O34 to 20 percent of the mass.
2. The composite catalyst for catalyzing and combusting ethyl acetate as claimed in claim 1, wherein the SnO is2Is the mass of Al2O38 to 16 percent of the mass.
3. The composite catalyst for catalyzing and combusting ethyl acetate as claimed in claim 2, wherein the SnO is2Is the mass of Al2O312% by mass.
4. A process for preparing a composite catalyst according to claim 1, 2 or 3, comprising the steps of:
step one, Ce (NO)3)3·6H2O and SnCl4Adding 300m L deionized water, stirring uniformly, adding 10m L mass concentration 68% nitric acid, fully dissolving, and adding 5g Al2O3Uniformly stirring the powder to obtain a suspension A;
step two, dripping 10m L palladium nitrate solution into the suspension A obtained in the step one at the speed of 1 drop/second, and uniformly stirring to obtain a suspension B, wherein each liter of the palladium nitrate solution contains 1g of metal palladium;
step three, stirring the suspension B in the step two, dripping ammonia water with the mass concentration of 28% in the stirring process, adjusting the pH value of the suspension B to 9, and then filtering to obtain a precipitate;
step four, placing the precipitate obtained in the step three in a drying oven, and drying for 18 hours at the temperature of 120 ℃;
and step five, placing the precipitate dried in the step four into a muffle furnace, heating to 650 ℃ at the heating rate of 6 ℃/min, and then preserving heat for 6 hours for roasting treatment to obtain the catalyst for catalyzing and burning the ethyl acetate.
5. A method for catalytic combustion of ethyl acetate using the composite catalyst of claim 1, 2 or 3, comprising: filling the catalyst into a reactor, heating to 100-400 ℃, keeping the temperature constant, and then, carrying out 80000h-1Continuously introducing ethyl acetate, steam and SO into the reactor at the mass space velocity2The mixed gas of (3) is subjected to combustion decomposition of ethyl acetate in the mixed gas under the catalysis of a catalyst to produce carbon dioxide and water.
6. The method of claim 5, wherein the composition of the mixed gas is, in volume percent: 0.5% of ethyl acetate, O220%, water vapor 5%, SO2500ppm, balance N2。
7. The method according to claim 5, wherein the catalyst charged in the reactor is a catalyst in the form of a strip prepared by a plodder and having a length of 3cm to 5 cm.
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