CN114433054A - Method for preparing monocyclic aromatic hydrocarbon by pyrolyzing solid waste under catalysis of boron-doped activated carbon - Google Patents
Method for preparing monocyclic aromatic hydrocarbon by pyrolyzing solid waste under catalysis of boron-doped activated carbon Download PDFInfo
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- CN114433054A CN114433054A CN202111578498.6A CN202111578498A CN114433054A CN 114433054 A CN114433054 A CN 114433054A CN 202111578498 A CN202111578498 A CN 202111578498A CN 114433054 A CN114433054 A CN 114433054A
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- boron
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 185
- -1 monocyclic aromatic hydrocarbon Chemical class 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000002910 solid waste Substances 0.000 title claims abstract description 64
- 238000006555 catalytic reaction Methods 0.000 title abstract description 41
- 238000000197 pyrolysis Methods 0.000 claims abstract description 65
- 239000002994 raw material Substances 0.000 claims abstract description 54
- 239000003054 catalyst Substances 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 230000003197 catalytic effect Effects 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 238000007233 catalytic pyrolysis Methods 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000002028 Biomass Substances 0.000 claims description 19
- 240000008042 Zea mays Species 0.000 claims description 17
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 17
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 17
- 235000005822 corn Nutrition 0.000 claims description 17
- 239000004698 Polyethylene Substances 0.000 claims description 16
- 229920000573 polyethylene Polymers 0.000 claims description 16
- 239000010902 straw Substances 0.000 claims description 16
- 241000219000 Populus Species 0.000 claims description 14
- 239000013502 plastic waste Substances 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 12
- 239000004793 Polystyrene Substances 0.000 claims description 10
- 229920002223 polystyrene Polymers 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 7
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 7
- 239000004327 boric acid Substances 0.000 claims description 7
- 229910052796 boron Inorganic materials 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 244000060011 Cocos nucifera Species 0.000 claims description 4
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 4
- 240000006394 Sorghum bicolor Species 0.000 claims description 4
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000010453 quartz Substances 0.000 description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 36
- 239000007789 gas Substances 0.000 description 29
- 239000012159 carrier gas Substances 0.000 description 21
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 14
- 239000012263 liquid product Substances 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 239000000047 product Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 238000001816 cooling Methods 0.000 description 9
- 230000002950 deficient Effects 0.000 description 9
- 239000012494 Quartz wool Substances 0.000 description 8
- 239000011148 porous material Substances 0.000 description 8
- 238000010926 purge Methods 0.000 description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229920001587 Wood-plastic composite Polymers 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000011155 wood-plastic composite Substances 0.000 description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000005899 aromatization reaction Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000012075 bio-oil Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000001819 mass spectrum Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
-
- 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
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/008—Pyrolysis reactions
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
- C07C4/02—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by cracking a single hydrocarbon or a mixture of individually defined hydrocarbons or a normally gaseous hydrocarbon fraction
- C07C4/06—Catalytic processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
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- General Chemical & Material Sciences (AREA)
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- Thermal Sciences (AREA)
- Carbon And Carbon Compounds (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention belongs to the technical field of preparation of monocyclic aromatic hydrocarbon by pyrolysis of solid waste, and particularly relates to a method for preparing monocyclic aromatic hydrocarbon by pyrolysis of solid waste under catalysis of boron-doped activated carbon. The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps: firstly preparing a boron-doped active carbon catalyst, then carrying out catalytic pyrolysis reaction by using typical combustible solid waste as a raw material, and finally condensing and collecting liquid, namely a product rich in monocyclic aromatic hydrocarbon. The invention provides a method for preparing monocyclic aromatic hydrocarbon by pyrolyzing solid waste under the catalysis of boron-doped activated carbon, which has the advantages of simple preparation process, high catalytic activity, high stability and high yield of monocyclic aromatic hydrocarbon prepared by pyrolyzing typical combustible solid waste under catalysis.
Description
Technical Field
The invention belongs to the technical field of preparation of monocyclic aromatic hydrocarbon by pyrolysis of solid waste, and particularly relates to a method for preparing monocyclic aromatic hydrocarbon by pyrolysis of solid waste under catalysis of boron-doped activated carbon.
Technical Field
The output of combustible solid waste in the solid waste is increased at a rate of 8% -10% per year, and how to utilize the combustible solid waste efficiently in a resource mode becomes a current research hotspot. The main components of typical combustible solid waste are biomass and plastic waste, and the biomass and plastic waste have interaction in the co-pyrolysis process, namely, free radicals generated by pyrolysis of the biomass can initiate decomposition reaction of plastic carbon chains, and the plastic can also serve as a hydrogen source to stabilize biomass pyrolysis free radicals, and the interaction is favorable for obtaining liquid products with high yield, low oxygen content and high calorific value.
However, the liquid product obtained by co-pyrolysis of biomass and plastic waste is very complex in composition, and includes both oxygen-containing organic compounds generated by pyrolysis of biomass components, such as acids, aldehydes and ketones, furans, sugars, phenols, and the like, and hydrocarbon substances with different carbon chain lengths generated by pyrolysis of plastic components, such as alkanes, alkenes, dienes, and the like, and the pyrolysis product thereof needs to be further refined to obtain high-quality liquid fuel oil or high value-added chemicals.
In the prior art, a catalyst is added in the pyrolysis process of biomass and plastics to realize the in-situ qualitative conversion of pyrolysis products, thereby obtaining high-grade liquid fuel or chemicals. The HZSM-5 molecular sieve is the most commonly used catalyst for biomass and plastic pyrolysis, has the characteristics of unique pore channel structure and strong acidity, shows good deoxidation effect and high aromatic selectivity, however, the HZSM-5 also has the problems of high cost, easy coking and inactivation and the like, and limits the commercial popularization and application of the HZSM-5 molecular sieve. Compared with HZSM-5, the activated carbon has larger specific surface area, abundant surface functional groups and developed micro-mesoporous pore canal structure, is beneficial to mass transfer and diffusion of pyrolysis macromolecules, is not easy to coke, has wide raw material source, and is easy to prepare in large scale and at low cost. In recent years, activated carbon has triggered a worldwide hot research trend as an inexpensive and stable catalyst.
CN202010014318.0 discloses a method for preparing aromatic hydrocarbon by pyrolyzing wood-plastic composite waste through activated carbon catalysis, wherein the wood-plastic composite waste is used as a raw material, the activated carbon is used as a catalyst, and the activated carbon is prepared from biomass through a phosphoric acid activation method; respectively putting the two into a fixed bed reactor for catalytic pyrolysis in the atmosphere of inert gas, and condensing pyrolysis gas to obtain a liquid product rich in aromatic hydrocarbon; the aromatic hydrocarbon compound with high yield is prepared by pyrolyzing the wood-plastic composite waste through activated carbon catalysis, but the yield of monocyclic aromatic hydrocarbon is low, the biomass-based activated carbon is activated by phosphoric acid, a large amount of phosphoric acid is consumed, the preparation cost is high, the mechanical strength of the activated carbon is poor, the catalytic life is short, and the reutilization property is poor; the pore structure of the phosphoric acid activated carbon is mainly mesoporous, a large amount of polycyclic aromatic hydrocarbon is generated by catalyzing the pyrolysis of wood and plastic, and the yield of important chemical raw materials such as benzene, toluene, xylene and other monocyclic aromatic hydrocarbon is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preparing monocyclic aromatic hydrocarbon by pyrolyzing solid waste under the catalysis of boron-doped activated carbon, which has the advantages of simple preparation process, high catalytic activity, high stability and high yield of monocyclic aromatic hydrocarbon prepared by pyrolyzing typical combustible solid waste under catalysis.
The invention relates to a method for preparing monocyclic aromatic hydrocarbon by pyrolysis of boron-doped activated carbon catalytic solid waste, which comprises the following steps: firstly preparing a boron-doped active carbon catalyst, then carrying out catalytic pyrolysis reaction by using typical combustible solid waste as a raw material, and finally condensing and collecting liquid, namely a product rich in monocyclic aromatic hydrocarbon.
The preparation method of the boron-doped active carbon catalyst comprises the following steps: soaking activated carbon in boric acid solution, stirring for 4-6 h at room temperature, filtering, drying at the temperature of 100-.
The mass of the boron doping is 0.5-3% of the mass of the activated carbon.
The temperature of the catalytic pyrolysis reaction is 300-800 ℃, preferably 400-650 ℃, and the reaction time is 15-20 min.
The mass ratio of the boron-doped active carbon catalyst to the raw material is (0.5:1) - (2: 1).
Typical combustible solid waste includes biomass waste and plastic waste.
The mass ratio of the biomass waste to the plastic waste is (2:8) - (8: 2).
The biomass waste is one or more of coconut shell, sorghum slag, corn straw and poplar.
The plastic waste is one or more of polyvinyl chloride, polyethylene, polypropylene and polystyrene.
Specifically, the method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps:
(1) preparation of boron-doped activated carbon catalyst
Dipping activated carbon in boric acid solution, stirring for 4-6 h at room temperature, filtering, drying at the temperature of 100-plus 110 ℃ to constant weight, carbonizing the dried substance for 2-3 h at the temperature of 700-900 ℃ in nitrogen atmosphere, washing the carbonized substance to neutrality, and drying at the temperature of 100-plus 110 ℃ to constant weight to obtain the boron-doped activated carbon catalyst; the mass of the boron doping is 0.5-3% of the mass of the activated carbon.
(2) Taking typical combustible solid waste as a raw material, carrying out catalytic pyrolysis reaction, and carrying out catalytic pyrolysis in a fixed bed reactor at 300-800 ℃ for 15-20 min in a nitrogen gas atmosphere; the mass ratio of the boron-doped active carbon catalyst to the raw material is (0.5:1) - (2: 1);
typical combustible solid waste comprises biomass waste and plastic waste, and the mass ratio of the biomass waste to the plastic waste is (2:8) - (8: 2);
the biomass waste is one or more of coconut shell, sorghum slag, corn straw and poplar;
the plastic waste is one or more of polyvinyl chloride, high-density polyethylene, polypropylene and polystyrene;
(3) and (3) rapidly condensing the volatile components generated by catalytic pyrolysis, and collecting liquid, namely the product rich in the monocyclic aromatic hydrocarbon.
According to the method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon, the boron-modified activated carbon catalyzes typical combustible solid waste under the condition of normal pressure, pyrolysis is performed to perform a pyrolysis deoxidation reaction, the content of oxygen-containing compounds is reduced, macromolecular compounds are promoted to be converted into light micromolecules, aromatic hydrocarbon is generated through an aromatization reaction, the multistage pore structure and the pore size distribution of the activated carbon are effectively regulated and controlled by boron modification, the selectivity of the monocyclic aromatic hydrocarbon is promoted, and the generation of the polycyclic aromatic hydrocarbon is inhibited.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, boron-doped activated carbon is used as the catalyst, the cost is low, the doping of boron is easy to implement, the preparation method is simple, the boron doping effectively improves the multi-level pore structure and pore size distribution of the activated carbon catalyst, and introduces new active sites, so that the catalyst is endowed with higher catalytic activity and selectivity, and the selective catalysis is facilitated to generate monocyclic aromatic hydrocarbon;
(2) according to the method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the boron-doped activated carbon catalytic solid waste, the typical combustible solid waste is subjected to catalytic pyrolysis to prepare the monocyclic aromatic hydrocarbon, the catalytic effect is good, and the catalytic process is green and efficient;
(3) the method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon has the advantages of simplicity, high catalytic activity, high selectivity on the monocyclic aromatic hydrocarbon and cost reduction.
Detailed Description
The invention provides a method for preparing monocyclic aromatic hydrocarbon by pyrolyzing solid waste under the catalysis of boron-doped activated carbon, and a person skilled in the art can use the content for reference and appropriately improve process parameters. It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the scope and ambit of the invention. While the process of the present invention has been described in terms of preferred embodiments, it will be apparent to those skilled in the art that variations and appropriate modifications and combinations of the process of the present invention may be made to implement and use the techniques of the present invention without departing from the spirit and scope of the invention. In order to further illustrate the present invention, the method for preparing monocyclic aromatic hydrocarbons by pyrolyzing the solid waste catalyzed by boron-doped activated carbon according to the present invention is described in detail with reference to the following examples.
Example 1
Preparation of boron-doped activated carbon catalyst 0.5 BAC:
firstly weighing 10g of commercial activated carbon, firstly adding 30ml of deionized water into a beaker, weighing boric acid with corresponding mass according to the boron-doped mass of 0.5% of the mass of the activated carbon, dissolving the boric acid in water to obtain a boric acid solution, and pouring the activated carbon into the boric acid solution to dip for 4 hours; drying the impregnated activated carbon in an electrothermal blowing drying oven at 105 ℃ until the weight is constant, taking out the dried activated carbon, putting the dried activated carbon in a tubular furnace, heating the activated carbon to 700 ℃ from room temperature at the heating rate of 5 ℃/min in the nitrogen atmosphere, and carrying out carbonization treatment for 2 hours; and (3) washing the carbonized sample with deionized water to be nearly neutral, putting the sample into a drying oven, drying the sample at 105 ℃ to constant weight to obtain the boron-doped activated carbon catalyst which is marked as 0.5 BAC.
Example 2
Preparation of boron-doped activated carbon catalyst 1 BAC: the boron-doped activated carbon catalyst obtained by adjusting the boron-doped mass to 1% of the mass of the activated carbon in the same manner as in the other steps of example 1 was designated as 1 BAC.
Example 3
Preparation of boron-doped activated carbon catalyst 2 BAC: the boron-doped activated carbon catalyst obtained by adjusting the boron-doped mass to only 2% of the mass of the activated carbon in the same manner as in the other steps of example 1 was designated as 2 BAC.
Example 4
Preparation of boron-doped activated carbon catalyst 3 BAC: the boron-doped activated carbon catalyst obtained by adjusting the boron-doped mass to only 3% of the mass of the activated carbon in the same manner as in the other steps of example 1 was designated as 3 BAC.
Comparative example 1
The unmodified activated carbon catalyst was labeled as AC.
Comparative example 2
Preparation of phosphoric acid activated corncob based activated carbon catalyst PAC: corn cob granules (50g) were immersed in 350mL of 19.5% H3PO4After stirring the solution at room temperature for 24h at 150r/min, the sample was dried to constant weight at 90 ℃. And (3) placing the dried sample in an Shanghai sinio MAS-II microwave pyrolysis reactor for carbonization treatment, wherein the microwave power is 700w, the carbonization time is 1h, washing the carbonized sample to neutral pH by using DI (DI), and then drying at 90 ℃ to constant weight to obtain the phosphoric acid activated corncob based activated carbon which is marked as PAC (poly aluminum chloride).
The catalysts prepared in examples 1-4 and comparative examples 1-2 were tested for pore volume and related indicators, and the results are shown in table 1:
TABLE 1 indices of catalysts of examples 1-4 and comparative examples 1-2
Example 5
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps:
taking corn straws and polyethylene as raw materials 2g, wherein the mass ratio of the corn straws to the polyethylene is 1:1, flatly paving the raw materials at the bottom of a quartz boat, taking 3.5g of the 0.5BAC catalyst prepared in the example 1, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the front end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, controlling the flow rate of the carrier gas through a gas flowmeter, firstly purging for 10min at the flow rate of 1000ml/min, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the flow rate of the gas to 400 ml/min; setting the temperature at 575 deg.c, raising the temperature from room temperature to 575 deg.c in the rate of 10 deg.c/min for 10min, and heatingAnd pushing the quartz boat to a pyrolysis reaction area for pyrolysis for 15min, and quickly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product, namely the product rich in the monocyclic aromatic hydrocarbon.
Example 6
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as that in example 5, and the only variable is that the adopted catalyst is the 1BAC catalyst prepared in example 2.
Example 7
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as that in example 5, and the only variable is that the adopted catalyst is the 2BAC catalyst prepared in example 3.
Example 8
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as that in example 5, and the only variable is that the adopted catalyst is the 3BAC catalyst prepared in example 4.
Example 9
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps:
taking corn straws and polyethylene as raw materials 2g, wherein the mass ratio of the corn straws to the polyethylene is 1:1, flatly paving the raw materials at the bottom of a quartz boat, taking 2.5g of the 1BAC catalyst prepared in the example 2, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the front end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, controlling the flow rate of the carrier gas through a gas flowmeter, firstly purging for 10min at the flow rate of 1000ml/min, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the flow rate of the gas to 400 ml/min; setting pyrolysis catalysis temperature at 500 ℃, raising the temperature from room temperature to a set temperature at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction zone for pyrolysis for 15min, and rapidly cooling condensable gas generated by pyrolysis reaction in a cold trap to obtain a liquid product, namely the product rich in monocyclic aromatic hydrocarbon.
Example 10
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the boron-doped activated carbon catalytic solid waste is completely the same as the other steps in the example 9, and the only variable is that the pyrolysis catalytic temperature is set to be 550 ℃.
Example 11
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 9, and the only variable is that the pyrolysis catalysis temperature is set to be 600 ℃.
Example 12
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 9, and the only variable is that the pyrolysis catalysis temperature is set to be 650 ℃.
Example 13
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps:
taking corn straws and polyethylene as raw materials 2g, wherein the mass ratio of the corn straws to the polyethylene is 1:1, flatly paving the raw materials at the bottom of a quartz boat, taking 1.0g of the 1BAC catalyst prepared in the embodiment 2, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the front end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, controlling the flow rate of the carrier gas through a gas flowmeter, firstly purging for 10min at the flow rate of 1000ml/min, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the flow rate of the gas to 400 ml/min; setting the pyrolysis catalysis temperature to 600 ℃, raising the temperature from room temperature to 600 ℃ at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction zone for pyrolysis for 15min, and quickly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product, namely the product rich in monocyclic aromatic hydrocarbon.
Example 14
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 13, and the only variable-amount 1BAC catalyst prepared in the example 2 is modified into 4.0 g.
Example 15
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps:
taking 2g of poplar and polyethylene as raw materials, wherein the mass ratio of the poplar to the polyethylene is 1:1, paving the raw materials at the bottom of a quartz boat, taking 2.5g of the 1BAC catalyst prepared in the example 2, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the head end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, controlling the flow rate of the carrier gas through a gas flowmeter, firstly purging for 10min at the flow rate of 1000ml/min, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the flow rate of the gas to 400 ml/min; setting the pyrolysis catalysis temperature to 600 ℃, raising the temperature from room temperature to 600 ℃ at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction zone for pyrolysis for 15min, and quickly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product, namely the product rich in monocyclic aromatic hydrocarbon.
Example 16
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 15, and the poplar is replaced by the coconut shell by the only variable.
Example 17
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the boron-doped activated carbon catalytic solid waste is completely the same as the other steps in the example 15, and the only variable is to replace the poplar wood with the sorghum slag.
Example 18
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps:
taking 2g of poplar and polypropylene as raw materials, wherein the mass ratio of the poplar to the polypropylene is 1:1, flatly paving the raw materials at the bottom of a quartz boat, taking 2.5g of the 1BAC catalyst prepared in the example 2, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the head end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, the carrier gas flow is controlled by a gas flowmeter, and the carrier gas is firstly purged by 10 percent of flow rate of 1000ml/minmin, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the gas flow rate to 400 ml/min; setting the pyrolysis catalysis temperature to 600 ℃, raising the temperature from room temperature to 600 ℃ at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction zone for pyrolysis for 15min, and quickly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product, namely the product rich in monocyclic aromatic hydrocarbon.
Example 19
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 18, and the polypropylene is replaced by the polystyrene by the only variable.
Example 20
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 18, and the polypropylene is replaced by the polyvinyl chloride by the only variable.
Example 21
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon comprises the following steps:
taking 2g of poplar and polystyrene as raw materials, wherein the mass ratio of the poplar to the polystyrene is 2:8, paving the raw materials at the bottom of a quartz boat, taking 2.5g of the 1BAC catalyst prepared in the example 2, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the head end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, controlling the flow rate of the carrier gas through a gas flowmeter, firstly purging for 10min at the flow rate of 1000ml/min, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the flow rate of the gas to 400 ml/min; setting the pyrolysis catalysis temperature to 600 ℃, raising the temperature from room temperature to 600 ℃ at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction zone for pyrolysis for 15min, and quickly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product, namely the product rich in monocyclic aromatic hydrocarbon.
Example 22
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 21, and the mass ratio of the poplar wood to the polystyrene is replaced by 4:6 by the only variable.
Example 23
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 21, and the mass ratio of the poplar wood to the polystyrene is replaced by 6:4 by the only variable.
Example 24
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste under the catalysis of the boron-doped activated carbon is completely the same as the other steps in the example 21, and the mass ratio of the poplar wood to the polystyrene is replaced by 8:2 by the only variable.
Comparative example 3
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste comprises the following steps:
taking corn straws and polyethylene as raw materials 2g, wherein the mass ratio of the corn straws to the polyethylene is 1:1, flatly paving the raw materials at the bottom of a quartz boat, placing the quartz boat at the head end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, controlling the flow rate of the carrier gas through a gas flowmeter, firstly purging for 10min at the flow rate of 1000ml/min, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the flow rate of the gas to 400 ml/min; setting the temperature at 575 ℃, raising the temperature from room temperature to 575 ℃ at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction zone for pyrolysis for 15min, and rapidly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product.
Comparative example 4
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste comprises the following steps:
taking corn straws and polyethylene as raw materials 2g, wherein the mass ratio of the corn straws to the polyethylene is 1:1, flatly paving the raw materials at the bottom of a quartz boat, taking 3.5g of the unmodified active carbon AC catalyst of the comparative example 1, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the front end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, the flow rate of the carrier gas is controlled by a gas flowmeter,purging with 1000ml/min for 10min to exhaust air inside the device to form oxygen-free or oxygen-deficient environment, and changing the gas flow rate to 400 ml/min; setting the temperature at 575 ℃, raising the temperature from room temperature to 575 ℃ at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction zone for pyrolysis for 15min, and rapidly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product.
Comparative example 5
The method for preparing the monocyclic aromatic hydrocarbon by pyrolyzing the solid waste comprises the following steps:
taking corn straws and polyethylene as raw materials 2g, wherein the mass ratio of the corn straws to the polyethylene is 1:1, flatly paving the raw materials at the bottom of a quartz boat, taking 4.0g of the modified activated carbon catalyst of the comparative example 2, placing the raw materials above the raw materials and separating the raw materials by quartz wool, placing the quartz boat at the front end of the left side of a quartz tube reactor, connecting an instrument device, and checking the air tightness of the device; by using N2As carrier gas, controlling the flow rate of the carrier gas through a gas flowmeter, firstly purging for 10min at the flow rate of 1000ml/min, exhausting the air in the device to form an oxygen-free or oxygen-deficient environment, and changing the flow rate of the gas to 400 ml/min; setting the temperature at 500 ℃, raising the temperature from room temperature to 500 ℃ at the speed of 10 ℃/min, keeping the temperature for 10min, pushing the quartz boat to a pyrolysis reaction area for pyrolysis for 15min, and quickly cooling condensable gas generated by the pyrolysis reaction in a cold trap to obtain a liquid product.
Measuring the components of the monocyclic aromatic hydrocarbon-rich product prepared in examples 5-24 and the liquid product prepared in comparative examples 3-5 by using an Agilent8890-5977B type gas chromatograph-mass spectrometer GC, wherein the carrier gas is high-purity helium, and the flow rate of the carrier gas is 1.0 mL/min; adopting a split-flow sample injection mode, wherein the split-flow ratio is 30:1, the temperature of a sample injection port is 280 ℃, and the model of a chromatographic column is a DB-1701 capillary column (60m multiplied by 0.25mm multiplied by 0.25 mu m); during the test, the autosampler absorbs 0.2 mu L of liquid automatically and sends the liquid into a detection system for detection, and the column box heats up the procedure: the temperature is raised from 40 ℃ to 240 ℃ at a rate of 5 ℃/min and maintained for 5 min. An ion source of the mass spectrum is an EI ion source, the energy is 70eV, the scanning range is 18-700 amu, the ion source temperature is 230 ℃, the quadrupole temperature is 150 ℃, detected data are analyzed through MassHunter software, liquid components and a standard spectrum library are subjected to comparative analysis, the content of each component in the bio-oil is calculated according to the peak area of a compound, and the detection result is shown in Table 2;
TABLE 2 results of composition analysis of products obtained in examples 5 to 24 and comparative examples 3 to 5
As can be seen from Table 2, in the method for preparing monocyclic aromatic hydrocarbon by pyrolyzing the boron-doped activated carbon catalytic solid waste, the content reaches the maximum value of 52.96% when the boron doping amount is 1%, and the content of polycyclic aromatic hydrocarbon reaches the minimum value of 20.01%; the temperature and the catalyst/raw material mass ratio are increased, so that the generation of monocyclic aromatic hydrocarbon is promoted, and the selectivity of the corn straw and the polystyrene raw material to the monocyclic aromatic hydrocarbon is high; compared with activated carbon activated by phosphoric acid, the boron-doped activated carbon improves the content of monocyclic aromatic hydrocarbon and inhibits the generation of polycyclic aromatic hydrocarbon.
Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.
Claims (9)
1. A method for preparing monocyclic aromatic hydrocarbon by pyrolysis of boron-doped activated carbon catalytic solid waste is characterized by comprising the following steps: firstly preparing a boron-doped active carbon catalyst, then carrying out catalytic pyrolysis reaction by using typical combustible solid waste as a raw material, and finally condensing and collecting liquid, namely a product rich in monocyclic aromatic hydrocarbon.
2. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 1, wherein the method comprises the following steps: the preparation method of the boron-doped active carbon catalyst comprises the following steps: soaking activated carbon in boric acid solution, stirring for 4-6 h at room temperature, filtering, drying at the temperature of 100-.
3. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 2, wherein the method comprises the following steps: the mass of the boron doping is 0.5-3% of the mass of the activated carbon.
4. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 1, wherein the method comprises the following steps: the temperature of the catalytic pyrolysis reaction is 300-800 ℃, and the reaction time is 15-20 min.
5. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 1, wherein the method comprises the following steps: the mass ratio of the boron-doped active carbon catalyst to the raw material is (0.5:1) - (2: 1).
6. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 1, wherein the method comprises the following steps: typical combustible solid waste includes biomass waste and plastic waste.
7. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 6, wherein the method comprises the following steps: the mass ratio of the biomass waste to the plastic waste is (2:8) - (8: 2).
8. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 6, wherein the method comprises the following steps: the biomass waste is one or more of coconut shell, sorghum slag, corn straw and poplar.
9. The method for preparing monocyclic aromatic hydrocarbons by pyrolysis of solid waste catalyzed by boron-doped activated carbon according to claim 6, wherein the method comprises the following steps: the plastic waste is one or more of polyvinyl chloride, polyethylene, polypropylene and polystyrene.
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