CN214571719U - Optical coupling microwave catalytic system applied to biomass pyrolysis - Google Patents
Optical coupling microwave catalytic system applied to biomass pyrolysis Download PDFInfo
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 38
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- 238000010168 coupling process Methods 0.000 title claims description 27
- 238000005859 coupling reaction Methods 0.000 title claims description 27
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- 238000006555 catalytic reaction Methods 0.000 claims abstract description 28
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- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 description 6
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
本实用新型公开了一种应用于生物质热解的光耦合微波催化体系。所述光耦合微波催化体系为光源置于催化体系中间的真空隔层管中，其中光源为脉冲强光源，四周排列了具有催化活性的催化板，催化板以多孔泡沫陶瓷板为载体，负载了两种及以上具有催化活性的金属氧化物催化剂。通过调节光源强度、脉冲宽度、脉冲频率和光催化剂负载量来调节光催化活性；通过调节多孔泡沫陶瓷的孔隙度、骨架强度，催化剂的负载量，微波功率来调节脱氧催化剂的催化活性。本实用新型应用于生物质热解后的蒸汽提质，通过“光催化剂催化释氢”耦合“金属氧化物催化脱氧”协同催化提高脱氧效率，减少焦油产生，有效提高热解生物油和生物气的品质，提高使用寿命，降低生产成本。
The utility model discloses a light-coupled microwave catalytic system applied to biomass pyrolysis. In the light-coupled microwave catalytic system, the light source is placed in a vacuum interlayer tube in the middle of the catalytic system, wherein the light source is a pulsed strong light source, and catalytic plates with catalytic activity are arranged around it. Two or more catalytically active metal oxide catalysts. The photocatalytic activity was adjusted by adjusting the light source intensity, pulse width, pulse frequency and photocatalyst loading; the catalytic activity of the deoxygenation catalyst was adjusted by adjusting the porosity, skeleton strength, catalyst loading, and microwave power of the porous foam ceramics. The utility model is applied to the steam upgrading after biomass pyrolysis, and the synergistic catalysis of "photocatalyst catalytic hydrogen release" coupled "metal oxide catalytic deoxygenation" improves deoxidation efficiency, reduces tar generation, and effectively improves pyrolysis bio-oil and bio-gas. quality, improve service life and reduce production costs.
Description
Technical Field
The utility model relates to a photocatalysis, microwave catalysis field, in particular to be applied to optical coupling microwave catalysis system of living beings pyrolysis.
Background
The development and utilization of biomass resources have important significance for relieving the problem of exhaustion of non-renewable resources, environmental problems and the like. Thermochemical conversion, especially catalytic pyrolysis, is one of the important means of biomass conversion. The introduction of the catalytic system can effectively improve the quality of the bio-oil and reduce the tar content in the gas, and common catalysts comprise molecular sieve catalysts, metal oxide catalysts and metal salt catalysts. Molecular sieve catalysts, such as ZSM-5, exhibit excellent aromatization and deoxygenation capabilities; metal oxide catalysts, such as CaO, MgO, exhibit good deoxygenation capabilities. At present, the catalyst is easy to passivate and deactivate, has short service life and poor economic benefit and is one of bottleneck problems limiting the wide replacement of petroleum by biomass. Therefore, how to improve the catalytic performance and the service life of the catalytic system is very important for the oil production and gas production through the pyrolysis and the conversion of biomass. Polycyclic aromatic hydrocarbon is an important precursor for coking and passivation of a catalyst, and is very important for reducing the generation of the polycyclic aromatic hydrocarbon or improving the degradation of the polycyclic aromatic hydrocarbon.
The microwave heating has the advantages of uniform heating, no hysteresis effect, safety and no pollution. The existing catalyst used in the microwave system mainly comprises a silicon carbide composite catalyst and a biochar catalyst. The microwave heating can effectively reduce the coking amount of the catalyst and prolong the service life of the catalyst. Research has shown that microwave catalytic upgrading can significantly increase the hydrocarbon content of bio-oil, but such upgrading is achieved at the expense of bio-oil yield. The photocatalysis is mainly applied to the fields of water pollution purification, organic synthesis, water photolysis hydrogen production and the like. Commonly used photocatalysts include titanium dioxide, zinc oxide, tin oxide, zirconium dioxide and modified catalysts thereof and the like.
The photocatalysis technology has the advantages of mild reaction conditions, low energy consumption, no secondary pollution and the like. With TiO2For example, when TiO2Can be irradiated on TiO by certain intensity2The surface of the catalyst generates an electron space with strong oxidation reduction capabilityHoles, and thus catalysis. How to utilize the characteristic of photocatalysis to apply the catalyst to the field of biomass pyrolysis, combining the microwave catalysis, adjusting the catalytic upgrading reaction path, reducing the generation of tar, slowing down the inactivation of the catalyst, improving the quality of the bio-oil and simultaneously improving the yield of the bio-oil, and further improving the benefit of biomass pyrolysis conversion oil production is a direction worthy of research.
SUMMERY OF THE UTILITY MODEL
The utility model provides an optical coupling microwave catalysis system suitable for living beings pyrolysis field, simple process has photocatalysis and microwave catalysis's advantage concurrently, realizes the high-efficient utilization of biomass resources.
The utility model discloses the technical scheme who adopts does:
the utility model provides a be applied to optical coupling microwave catalytic system of living beings pyrolysis, includes quartz ring, steam inlet, light source, vacuum interlayer pipe, catalysis board, microwave source and steam outlet, the light source is installed in vacuum interlayer pipe, installs the catalysis board outside the vacuum interlayer pipe, and the catalysis board is installed in the intermediate layer of quartz ring, and the light source separates through vacuum interlayer pipe with the catalysis board, and the catalysis board outer lane evenly is provided with the microwave source, and the catalysis board is certain angle arrangement around the light source.
The number of the catalytic plates is 30.
The arrangement angle of the catalytic plates is 12-180 degrees. The microwave sources are arranged in a regular pentagonal shape, and the arrangement mode can also be regular trilateral arrangement, regular heptalateral arrangement or regular nonateral arrangement.
The catalytic upgrading of the pyrolysis gas is realized when the pyrolysis gas passes through the catalytic system and contacts with the catalyst. Wherein the intensity, pulse width, pulse frequency and microwave power of the light source can be adjusted.
The light source of the utility model is a xenon lamp.
Optical coupling microwave catalysis system accessible concatenates and is applied to living beings pyrolysis equipment.
The catalytic board is prepared by loading one layer of deoxidation catalyst on the surface of porous foamed ceramic, and then dispersedly loading one layer of photocatalyst on the outer layer of the deoxidation catalyst, and the specific preparation method comprises the following steps:
(1) preparing porous foamed ceramics: after SiC and TiC are mixed in proportion, the mixture is ball-milled at low speed for 0.5 to 2 hours to prepare ceramic aggregate. Mixing the ceramic aggregate and aluminum dihydrogen phosphate according to a ratio of 1:1-4:1, and adding kaolin and deionized water to prepare slurry. After the slurry is stirred and mixed evenly, the mixture is aged for 12 to 48 hours at room temperature.
(2) Cutting polyurethane foam into required shape and size, soaking and kneading the polyurethane foam for 1 to 3 hours by using 8 to 20 percent sodium hydroxide solution, and soaking the polyurethane foam for 0.5 to 3 hours by using 0.5 to 3 percent sodium carboxymethyl cellulose solution after cleaning for later use.
(3) And (3) soaking the treated polyurethane foam into the slurry, and removing the redundant slurry through a rolling process to obtain a prefabricated body.
(4) Drying the prefabricated body for 12-48 hours at room temperature, drying the prefabricated body for 8-24 hours in an oven at 65 ℃, and finally calcining the prefabricated body in air to obtain the porous foamed ceramic. The calcination process employs a temperature program that first goes from room temperature to 200 deg.C at 2 deg.C/min, then from 200 deg.C to 500 deg.C at 1 deg.C/min and holds for 1 hour, and finally goes to the final temperature at 2 deg.C/min and holds for 2 hours.
(5) Preparing deoxidation catalyst slurry: one or more of seven raw materials of magnesia, calcium oxide, zirconia, alumina, strontium oxide, cerium oxide and nickel oxide are selected and compounded according to the proportion, and then are mixed in a ball mill for 0.5 to 2 hours at a low speed, and the compound raw material is marked as 1. Based on 100 parts of the compound raw material 1, 0.1-0.5 part of polyvinyl alcohol, 0.5-4.0 parts of carboxymethyl cellulose and 0.2-1.0 part of alkaline silica sol are weighed and dissolved in a certain amount of deionized water, and the mixture is marked as the compound raw material 2 after being uniformly mixed. And mixing the compound raw material 1 and the compound raw material 2, and stirring to obtain the deoxygenation catalyst slurry.
(6) And (3) immersing the porous foamed ceramic into the deoxidizing catalyst slurry, throwing off the redundant slurry, and drying at room temperature for 12-24 hours. And (4) carrying out secondary slurry coating on the dried embryo body by adopting a slurry spraying method, throwing off redundant slurry, and drying at room temperature for 12-24 hours. And the pulp can be hung for a plurality of times with the pulp hanging for the second time until the blank body is evenly hung with pulp. And drying at room temperature for 12-24 hours after the last slurry coating, and drying in an oven at 65 ℃ for 8-24 hours to obtain a catalyst embryo body.
(7) Calcining the catalyst blank: the calcination of the catalyst blank adopts temperature programming, firstly, the temperature is raised from room temperature to 300 ℃ at 2 ℃/min, then the temperature is raised from 300 ℃ to 500 ℃ at 1 ℃/min and is kept for 1 hour, and finally, the temperature is raised to the final temperature at 2 ℃/min and is kept for 2 hours.
(8)TiO2Preparing a precursor: measuring tetrabutyl titanate and absolute ethyl alcohol according to the volume ratio of 1:1, mixing, magnetically stirring for 0.5-1 h, dripping 1mol/L nitric acid solution with the same volume, and continuously stirring for 1-2h to obtain TiO2And (3) precursor.
(9) Placing the sintered catalyst blank in TiO2And standing the precursor for 2-5 hours, taking out the precursor, washing, naturally drying in the shade, and then drying by blowing at 70 ℃ for 12-24 hours. After drying, calcining for 1-2h at the temperature of 100-300 ℃ to obtain the final catalytic plate.
Further, the deionized water in the step (1) is added according to the solid content of the slurry of 60-80%.
Further, the deionized water in the step (5) is added according to the solid content of the slurry of 40-60%.
Further, the final temperature in the step (4) is set at 1500 ℃ of 1000-.
Further, the final temperature in the step (7) is set at 800-.
The utility model also provides a living beings pyrolysis device, the device contain foretell optical coupling microwave catalytic system.
A be applied to optical coupling microwave catalysis system of living beings pyrolysis, can directly be applied to living beings catalytic pyrolysis and upgrade, realize going on in step of "photocatalyst catalysis hydrogen release" and "metallic oxide catalysis deoxidation" under more mild condition, reduce the production of tar, effectively improve the quality of pyrolysis bio-oil and biogas. The catalytic system can realize in-situ self-cleaning, prolong the service life and reduce the production cost.
Drawings
FIG. 1 is a schematic view of the catalytic plate of the optical coupling microwave catalytic system of the present invention.
Fig. 2 is a schematic diagram of the overall structure of the optical coupling microwave catalytic system of the present invention.
Figure 3 is a cross-sectional view of the inventive photo-coupled microwave catalytic system.
Fig. 4 is a schematic flow chart of an embodiment of the present invention.
In fig. 2 and 3, 1 is a steam inlet, 2 is a light source, 3 is a vacuum interlayer pipe, 4 is a catalytic plate, 5 is a microwave source, and 6 is a steam outlet.
In fig. 4, 1 is a pyrolysis reaction chamber, 2 is a slag storage tank, 3 is an optical coupling microwave catalytic system, 4 is a cooling device, 5 is a liquid storage tank, 6 is a gas sampling port, 7 is a gas purification device, and 8 is a roots blower.
Detailed Description
The present invention will be further illustrated by the following examples, which are to be considered in conjunction with the accompanying drawings, and which are to be considered in all respects illustrative and not restrictive.
As shown in fig. 1-3, an optical coupling microwave catalytic system applied to biomass pyrolysis comprises a quartz ring, a steam inlet 1, a light source 2, a vacuum interlayer tube 3, a catalytic plate 4, a microwave source 5 and a steam outlet 6, wherein the light source 2 is installed in the vacuum interlayer tube 3, the catalytic plate 4 is installed outside the vacuum interlayer tube 3, the catalytic plate 4 is installed in an interlayer of the quartz ring, the light source 2 and the catalytic plate 4 are separated by the vacuum interlayer tube 3, the microwave source 5 is uniformly arranged on the outer ring of the catalytic plate 4, and the catalytic plate 4 is arranged around the light source 2 at a certain angle.
The number of the catalytic plates 4 is 30.
The arrangement angle of the catalytic plates is 12-180 degrees.
The microwave sources 5 are arranged in a regular pentagonal shape, and the arrangement mode can also be a regular trilateral shape, a regular heptalateral shape or a regular nonalateral shape.
The catalytic upgrading of the pyrolysis gas is realized when the pyrolysis gas passes through the catalytic system and contacts with the catalyst. Wherein the intensity, pulse width, pulse frequency and microwave power of the light source can be adjusted.
The light source 2 is a xenon lamp.
More specifically, the catalytic plate is prepared by loading a layer of deoxidation catalyst on the surface of porous foamed ceramic, and then dispersedly loading a layer of photocatalyst on the outer layer of the deoxidation catalyst, and the preparation method specifically comprises the following steps:
(1) preparing porous foamed ceramics: after mixing SiC and TiC in proportion, carrying out low-speed ball milling and mixing for 0.5-2 hours to prepare ceramic aggregate; mixing the ceramic aggregate and aluminum dihydrogen phosphate according to a ratio of 1:1-4:1, and adding kaolin and deionized water to prepare slurry; after the slurry is stirred and evenly mixed, ageing the slurry for 12 to 48 hours at room temperature; deionized water is added according to the solid content of the slurry of 60-80%.
(2) Cutting polyurethane foam into required shape and size, soaking and kneading the polyurethane foam for 1 to 3 hours by using 8 to 20 percent sodium hydroxide solution, and soaking the polyurethane foam for 0.5 to 3 hours for later use after cleaning the polyurethane foam;
(3) immersing the treated polyurethane foam into the slurry, and removing the redundant slurry through a rolling process to obtain a prefabricated body;
(4) drying the prefabricated body for 12-48 hours at room temperature, drying the prefabricated body for 8-24 hours in a drying oven at 65 ℃, and finally calcining the prefabricated body in air to obtain porous foamed ceramic; the calcination process adopts programmed temperature rise, firstly, the temperature is raised from room temperature to 200 ℃ at the speed of 2 ℃/min, then, the temperature is raised from 200 ℃ to 500 ℃ at the speed of 1 ℃/min and is kept for 1 hour, and finally, the temperature is raised to the final temperature at the speed of 2 ℃/min and is kept for 2 hours; the final temperature is set at 1000-1500 ℃;
(5) preparing deoxidation catalyst slurry: selecting one or more of seven raw materials of magnesium oxide, calcium oxide, zirconium oxide, aluminum oxide, strontium oxide, cerium oxide and nickel oxide for compounding according to a proportion, and then mixing the raw materials in a ball mill at a low speed for 0.5 to 2 hours, and marking as a compounded raw material 1; taking the compound raw material 1 as 100 parts, weighing and dissolving 0.1-0.5 part of polyvinyl alcohol, 0.5-4.0 parts of carboxymethyl cellulose and 0.2-1.0 part of alkaline silica sol in a certain amount of deionized water, and marking as a compound raw material 2 after uniformly mixing; mixing the compound raw material 1 and the compound raw material 2, and stirring to prepare a deoxygenation catalyst slurry; adding deionized water according to the solid content of the slurry of 40-60%;
(6) immersing the porous foamed ceramic into the deoxidizing catalyst slurry, throwing off the redundant slurry, and drying at room temperature for 12-24 hours; carrying out secondary slurry coating on the dried embryo body by adopting a slurry spraying method, throwing off redundant slurry, and drying at room temperature for 12-24 hours; the pulp can be hung for a plurality of times with the pulp hanging for the second time until the blank body is evenly hung with pulp; drying at room temperature for 12-24 hours after the last slurry coating, and drying in an oven at 65 ℃ for 8-24 hours to obtain a catalyst blank;
(7) calcining the catalyst blank: the calcination of the catalyst blank adopts programmed temperature rise, firstly, the temperature is raised from room temperature to 300 ℃ at the speed of 2 ℃/min, then, the temperature is raised from 300 ℃ to 500 ℃ at the speed of 1 ℃/min and is kept for 1 hour, and finally, the temperature is raised to the final temperature at the speed of 2 ℃/min and is kept for 2 hours; the final temperature is set at 800-1200 ℃;
(8)TiO2preparing a precursor: measuring tetrabutyl titanate and absolute ethyl alcohol according to the volume ratio of 1:1, mixing, magnetically stirring for 0.5-1 h, dripping 1mol/L nitric acid solution with the same volume, and continuously stirring for 1-2h to obtain TiO2A precursor;
(9) placing the sintered catalyst blank in TiO2Standing the precursor for 2-5 hours, taking out the precursor, washing, naturally drying in the shade, and then drying by air blowing at 70 ℃ for 12-24 hours; after drying, calcining for 1-2h at the temperature of 100-300 ℃ to obtain the final catalytic plate.
As shown in fig. 4, a biomass pyrolysis device comprises a pyrolysis reaction chamber 1, a slag storage tank 2, a photo-coupled microwave catalytic system 3, a cooling device 4, a liquid storage tank 5, a gas sampling port 6, a gas purification device 7 and a roots blower 8. The steam inlet end of the optical coupling microwave catalytic system is connected with the air outlet end of the pyrolysis reaction cavity, and the steam outlet end of the optical coupling microwave catalytic system is connected with the inlet end of the cooling device.
Example 1
In the preparation step (1) of the catalytic plate, the ratio of SiC to TiC is 1:0, the ball milling time is 1 hour, the ratio of ceramic aggregate to aluminum dihydrogen phosphate is 2:1, the solid content of the slurry is 80%, and the ageing time is 24 hours; in the step (2), the concentration of sodium hydroxide is 16%, the soaking time is 2 hours, the concentration of sodium carboxymethyl cellulose solution is 2%, and the soaking time is 2 hours; drying the preform in the step (4) for 24 hours at room temperature, and then drying the preform in an oven for 12 hours, wherein the final calcining temperature is 1200 ℃; in the step (5), the compound raw materials are magnesium oxide and aluminum oxide which are mixed and ball-milled for 1 hour according to the ratio of 10:1, 0.2 part of polyvinyl alcohol, 0.5 part of carboxymethyl cellulose and 0.5 part of alkaline silica sol, and the solid content of the slurry is 55%; after the foamed ceramic is subjected to slurry coating in the step (6), drying for 18 hours at room temperature each time, and drying for 24 hours in an oven; in the step (7), the final calcining temperature of the embryo body is set at 1200 ℃; in the step (8), the magnetic stirring time is 1 hour, and after 1mol/L of nitric acid solution with the same volume is dropped, the stirring is continued for 2 hours; and (4) standing for 4 hours in the step (9), wherein the forced air drying time is 12 hours, the calcining temperature is 300 ℃, and the calcining time is 1 hour.
And assembling the light source, the catalytic plate and the microwave source according to the attached drawing to obtain the optical coupling microwave catalytic system.
The optical coupling microwave catalysis system is connected in series in the biomass pyrolysis system.
In the embodiment, soapstock is used as a raw material, the pyrolysis temperature is 550 ℃, the microwave power of the optical coupling microwave catalytic system is 500W, and the light source intensity is 1mW/cm-2And taking the liquid in the liquid storage tank and the gas at the gas sampling port for analysis. The yield of the biological oil is 68.31 percent, the monocyclic aromatic hydrocarbon content in the biological oil is 67.24 percent, the polycyclic aromatic hydrocarbon content is 1.63 percent, and the tar content in the gas is 0.17g/m3。
Example 2
In the preparation step (1) of the catalytic plate, the ratio of SiC to TiC is 1:0, the ball milling time is 1 hour, the ratio of ceramic aggregate to aluminum dihydrogen phosphate is 2:1, the solid content of the slurry is 80%, and the ageing time is 24 hours; in the step (2), the concentration of sodium hydroxide is 16%, the soaking time is 2 hours, the concentration of sodium carboxymethyl cellulose solution is 2%, and the soaking time is 2 hours; drying the preform in the step (4) for 24 hours at room temperature, and then drying the preform in an oven for 12 hours, wherein the final calcining temperature is 1200 ℃; in the step (5), the compound raw materials are magnesium oxide, calcium oxide and aluminum oxide which are mixed and ball-milled for 1 hour according to the ratio of 5:5:1, 0.2 part of polyvinyl alcohol, 0.5 part of carboxymethyl cellulose and 0.5 part of alkaline silica sol, and the solid content of the slurry is 55%; after the foamed ceramic is subjected to slurry coating in the step (6), drying for 18 hours at room temperature each time, and drying for 24 hours in an oven; in the step (7), the final calcining temperature of the embryo body is set at 1200 ℃; in the step (8), the magnetic stirring time is 1 hour, and after 1mol/L of nitric acid solution with the same volume is dropped, the stirring is continued for 2 hours; and (4) standing for 4 hours in the step (9), wherein the forced air drying time is 12 hours, the calcining temperature is 300 ℃, and the calcining time is 1 hour.
And assembling the light source, the catalytic plate and the microwave source according to the attached drawing to obtain the optical coupling microwave catalytic system.
The optical coupling microwave catalysis system is connected in series in the biomass pyrolysis system.
In the embodiment, soapstock is used as a raw material, the pyrolysis temperature is 550 ℃, the microwave power of the optical coupling microwave catalytic system is 500W, and the light source intensity is 1mW/cm-2And taking the liquid in the liquid storage tank and the gas at the gas sampling port for analysis. The yield of the biological oil is 65.91 percent, the monocyclic aromatic hydrocarbon content in the biological oil is 69.14 percent, the polycyclic aromatic hydrocarbon content is 2.17 percent, and the tar content in the gas is 0.29g/m3。
Example 3
In the preparation step (1) of the catalytic plate, the ratio of SiC to TiC is 1:0, the ball milling time is 1 hour, the ratio of ceramic aggregate to aluminum dihydrogen phosphate is 2:1, the solid content of the slurry is 80%, and the ageing time is 24 hours; in the step (2), the concentration of sodium hydroxide is 16%, the soaking time is 2 hours, the concentration of sodium carboxymethyl cellulose solution is 2%, and the soaking time is 2 hours; drying the preform in the step (4) for 24 hours at room temperature, and then drying the preform in an oven for 12 hours, wherein the final calcining temperature is 1200 ℃; in the step (5), the compound raw materials are magnesium oxide, calcium oxide and aluminum oxide which are mixed and ball-milled for 1 hour according to the ratio of 5:5:1, 0.2 part of polyvinyl alcohol, 0.5 part of carboxymethyl cellulose and 0.5 part of alkaline silica sol, and the solid content of the slurry is 55%; after the foamed ceramic is subjected to slurry coating in the step (6), drying for 18 hours at room temperature each time, and drying for 24 hours in an oven; in the step (7), the final calcining temperature of the embryo body is set at 1200 ℃; in the step (8), the magnetic stirring time is 1 hour, and after 1mol/L of nitric acid solution with the same volume is dropped, the stirring is continued for 2 hours; and (4) standing for 4 hours in the step (9), wherein the forced air drying time is 12 hours, the calcining temperature is 300 ℃, and the calcining time is 1 hour.
And assembling the light source, the catalytic plate and the microwave source according to the attached drawing to obtain the optical coupling microwave catalytic system.
The optical coupling microwave catalysis system is connected in series in the biomass pyrolysis system.
In the embodiment, rice straws are used as raw materials, the pyrolysis temperature is 550 ℃, the microwave power of the optical coupling microwave catalytic system is 500W, and the light source intensity is 1mW/cm-2Taking liquid in the liquid storage tank and gas at the gas sampling portAnd (6) carrying out analysis. The yield of the biological oil is 54.81 percent, the monocyclic aromatic hydrocarbon content in the biological oil is 41.34 percent, the polycyclic aromatic hydrocarbon content is 2.47 percent, and the tar content in the gas is 1.07g/m3。
Example 4
In the preparation step (1) of the catalytic plate, the ratio of SiC to TiC is 1:0, the ball milling time is 1 hour, the ratio of ceramic aggregate to aluminum dihydrogen phosphate is 2:1, the solid content of the slurry is 80%, and the ageing time is 24 hours; in the step (2), the concentration of sodium hydroxide is 16%, the soaking time is 2 hours, the concentration of sodium carboxymethyl cellulose solution is 2%, and the soaking time is 2 hours; drying the preform in the step (4) for 24 hours at room temperature, and then drying the preform in an oven for 12 hours, wherein the final calcining temperature is 1200 ℃; in the step (5), the compound raw materials are zirconium oxide and calcium oxide which are mixed and ball-milled for 1 hour according to a ratio of 20:1, 0.2 part of polyvinyl alcohol, 0.5 part of carboxymethyl cellulose and 0.5 part of alkaline silica sol, and the solid content of the slurry is 55%; after the foamed ceramic is subjected to slurry coating in the step (6), drying for 18 hours at room temperature each time, and drying for 24 hours in an oven; in the step (7), the final calcining temperature of the embryo body is set at 1200 ℃; in the step (8), the magnetic stirring time is 1 hour, and after 1mol/L of nitric acid solution with the same volume is dropped, the stirring is continued for 2 hours; and (4) standing for 4 hours in the step (9), wherein the forced air drying time is 12 hours, the calcining temperature is 300 ℃, and the calcining time is 1 hour.
And assembling the light source, the catalytic plate and the microwave source according to the attached drawing to obtain the optical coupling microwave catalytic system.
The optical coupling microwave catalysis system is connected in series in the biomass pyrolysis system.
In the embodiment, rice straws are used as a raw material, the pyrolysis temperature is 550 ℃, the microwave power of the optical coupling microwave catalytic system is 500W, the light source intensity is 1mW/cm & lt-2 & gt, and the liquid in the liquid storage tank and the gas in the gas sampling port are taken for analysis. The yield of the biological oil is 56.39%, the content of monocyclic aromatic hydrocarbon in the biological oil is 38.61%, the content of polycyclic aromatic hydrocarbon in the biological oil is 1.37%, and the content of tar in the gas is 0.93g/m 3.
The foregoing merely illustrates preferred embodiments of the present invention, which are described in considerable detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. The utility model provides a be applied to optical coupling microwave catalysis system of living beings pyrolysis which characterized in that, includes quartz ring, steam inlet, light source, vacuum interlayer pipe, catalysis board, microwave source and steam outlet, the light source is installed in vacuum interlayer pipe, and the catalysis board is installed to the vacuum interlayer outside of tubes, and the catalysis board is installed in the intermediate layer of quartz ring, and the light source separates through vacuum interlayer pipe with the catalysis board, and the catalysis board outer lane evenly is provided with the microwave source, and the catalysis board is certain angle arrangement around the light source.
2. The photo-coupled microwave catalytic system applied to biomass pyrolysis according to claim 1, wherein the number of the catalytic plates is 30.
3. The photo-coupled microwave catalytic system applied to biomass pyrolysis as claimed in claim 1, wherein the microwave sources are arranged in a regular pentagonal arrangement, a regular trilateral arrangement, a regular heptagonal arrangement or a regular nonagonal arrangement.
4. The photo-coupled microwave catalytic system applied to biomass pyrolysis according to claim 1, wherein the light source is a xenon lamp.
5. The photo-coupled microwave catalytic system applied to biomass pyrolysis according to claim 1, wherein the photo-coupled microwave catalytic system is applied to a biomass pyrolysis device through tandem connection.
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