WO2018227842A1 - Catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation - Google Patents

Catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation Download PDF

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WO2018227842A1
WO2018227842A1 PCT/CN2017/107943 CN2017107943W WO2018227842A1 WO 2018227842 A1 WO2018227842 A1 WO 2018227842A1 CN 2017107943 W CN2017107943 W CN 2017107943W WO 2018227842 A1 WO2018227842 A1 WO 2018227842A1
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biochar
catalyst
lignin
rich
solution
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PCT/CN2017/107943
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English (en)
Chinese (zh)
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卜权
摩根•赫文•马里恩
梁江辉
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江苏大学
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/06Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of zinc, cadmium or mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/50Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02Impregnation, coating or precipitation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/06Washing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08Heat treatment
    • B01J37/082Decomposition and pyrolysis
    • B01J37/084Decomposition of carbon-containing compounds into carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/34Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
    • B01J37/341Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
    • B01J37/344Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy
    • B01J37/346Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy of microwave energy
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G3/00Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
    • C10G3/42Catalytic treatment
    • C10G3/44Catalytic treatment characterised by the catalyst used
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G3/00Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
    • C10G3/42Catalytic treatment
    • C10G3/44Catalytic treatment characterised by the catalyst used
    • C10G3/48Catalytic treatment characterised by the catalyst used further characterised by the catalyst support
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00Technologies relating to oil refining and petrochemical industry
    • Y02P30/20Technologies relating to oil refining and petrochemical industry using bio-feedstock

Definitions

  • the invention belongs to the technical field of biomass catalytic pyrolysis, and in particular relates to a catalyst for producing an aromatic-rich biofuel and a preparation method thereof.
  • biomass energy resources including crops such as corn, wheat and rice, and residues of rice husk and sugar cane agricultural products, which can reach several hundred million tons per year.
  • Biomass has been identified as the most promising raw material for the production of renewable energy.
  • the yield and quality of the obtained liquid oil are low, the selectivity is poor, the catalyst activity is low, and it is easy to be deactivated. Therefore, it is necessary to increase the biomass pyrolysis liquid. The yield and quality of the product.
  • Biochar is a solid product formed by high-temperature pyrolysis of biomass under anaerobic anoxic state, which itself contains some mineral elements. Alkali metal elements such as Ca, Mg, Zn, etc., in addition, biochar has developed voids and specific surface area. Therefore, this study is based on biochar products formed by microwave pyrolysis biomass and is subjected to transition metal oxides. Modification, preparation of a biochar catalyst, using this biochar catalyst to solve the problem of bio-oil yield and quality in pyrolysis experiments.
  • Biomass consists mainly of cellulose, hemicellulose and lignin.
  • lignin accounts for 25% and is the second most abundant organic matter in the world (cellulose is the first).
  • Lignin is a complex phenolic polymer formed from three alcohol monomers (coumaryl alcohol, coniferyl alcohol, sinapyl alcohol).
  • coumaryl alcohol, coniferyl alcohol, sinapyl alcohol a complex phenolic polymer formed from three alcohol monomers.
  • coumaryl alcohol, coniferyl alcohol, sinapyl alcohol coumaryl alcohol, coniferyl alcohol, sinapyl alcohol
  • this study intends to prepare lignin-derived biochar by microwave-assisted pyrolysis and load transition metal oxygen on the surface of biochar produced to regulate the physicochemical properties of lignin-derived biochar catalyst.
  • the conversion rate of raw materials is increased, the formation of carbon deposits is reduced, and the activity, selectivity and service life of the catalyst are improved.
  • the object of the present invention is to provide a catalyst for producing an aromatic hydrocarbon-rich biofuel and a preparation method thereof, so as to obtain a modified catalyst, thereby improving liquid yield and quality in biomass catalytic pyrolysis reaction, specifically in improving raw materials.
  • the conversion rate and the chemical component selectivity of the bio-oil reduce the formation of catalyst coke and increase the activity and selectivity of the catalyst.
  • the present invention uses lignin microwave pyrolysis to derive biochar as a catalyst carrier raw material, reveals the influence of the supported transition metal oxide on the prepared biochar catalyst, and analyzes the prepared transition metal by XRD, SEM and other analytical means.
  • the microscopic morphology of the modified biochar catalyst, the combination of the active component and the carrier, and the distribution state are as follows:
  • a method for preparing a catalyst for producing an aromatic-rich biofuel characterized by comprising the steps of:
  • Step one microwave pyrolysis of lignin to obtain biochar;
  • the lignin raw material is weighed according to the required amount and placed in a quartz flask reactor, and the microwave pyrolysis parameter is set to a reaction temperature of 500 ° C, and the microwave power is 750 W,
  • the lignin pyrolysis reaction occurs more completely, so that pure biochar is obtained, and the reaction time is set to 30 minutes;
  • Step 2 Preparation of biochar powder: The biochar is poured out from the quartz flask reactor and cooled to room temperature; since the lignin is pyrolyzed in the microwave, it is easy to form a block-like biochar product.
  • the lignin-derived biochar produced by microwave pyrolysis is first pulverized into fine powder, and then sieved to ensure uniformity of size, thereby obtaining a biochar powder;
  • Step three repeatedly washing the biochar powder with deionized water to remove contaminants from the biochar powder structure and open the surface pores of the biochar to obtain pure biochar powder;
  • Step 4 drying the pure biochar powder in an oven at 105 ° C for 15 h to remove excess water to obtain a dried biochar powder;
  • Step 5 dissolving the weighed zinc salt in deionized water to obtain a solution A, and adding the dried biochar powder to the solution A under continuous stirring to obtain a solution B; the metal element in the zinc salt The mass ratio is 5% of the selected biochar;
  • Step six using a magnetic stirrer to continuously stir the solution B, to obtain a solution C;
  • Step 7 the solution C is subjected to suction filtration and molding to obtain a shaped columnar particulate material, which is then dried in an oven to obtain a product 1;
  • Step 8 calcining the product one through a high-temperature tube furnace in a mixed gas atmosphere of nitrogen and hydrogen to crystallize and shape, thereby preparing a final product, that is, a modified biochar catalyst loaded with a transition metal;
  • the volume ratio of nitrogen to hydrogen in the mixture is 99:1.
  • the lignin raw material in the first step is a commercial lignin.
  • the zinc salt in the fifth step is Zn(NO 3 ) 2 .6H 2 O, and the mass ratio of the zinc salt to the dried biochar powder is 5%.
  • Step 6 specifically, the solution B was placed on a magnetic stirrer, a magnetic stir bar was added to the solution, and stirring was continued for 6 hours in a water bath at 60 ° C.
  • the step 7 is specifically: suction filtration, molding is to put a layer of filter paper in the Buchner funnel and then connect the Buchner funnel to the vacuum pump, and the solution C is suction filtered in the prepared Buchner funnel, and the filter paper is retained after the suction filtration.
  • the residue was then made into a columnar particle having a diameter of 5 mm and a length of 7 mm using a plastic tube to facilitate use in experiments.
  • Step 7 The drying conditions were specifically vacuum dried in an electric oven at 105 ° C for 15 h.
  • step 8 in a tube furnace, a mixed gas having a flow rate of 60 mL/min was used to maintain an oxygen-deficient atmosphere, and crystallization was performed at a temperature of 550 ° C for 4 hours.
  • a catalyst for producing an aromatic-rich biofuel which is produced by the above method.
  • the present invention has a beneficial effect.
  • the transition metal modified biochar catalyst prepared in the invention maintains the characteristic mode of the biochar topology, and the modified biochar catalyst still maintains a regular structure. It shows that the dispersibility of the modified biochar catalyst is still good.
  • the XRD pattern of the biochar modified with zinc salt has a more prominent peak than the unmodified biochar catalyst, which is a high crystal formed by substances other than the framework material, and also indicates the peak. It is caused by the addition of zinc, while the other peaks are consistent with the peak of the biochar catalyst. From the SEM analysis, the main crystal particles and their agglomerates can be slightly changed in the sample with the addition of zinc salt. Compared with the biochar without metal addition, the single crystal size of the zinc-doped sample is slightly reduced, and the surface is slightly reduced. More smooth.
  • Figure 1 is an XRD diffraction pattern of the effect of the zinc salt of the present invention on a modified biochar catalyst
  • FIG. 3 is an analysis diagram of the bio-oil component of the modified catalyst and the un-catalyzed lignin/PE microwave co-pyrolysis reaction product of the present invention
  • FIG. 4 is a flow chart of a method of the present invention.
  • FIG. 40 g of the lignin biomass feedstock was weighed and placed in the reaction flask without the addition of a heating agent, so that the resulting coke was as pure as possible. Nitrogen gas was introduced for 15 min before the start of the experiment to maintain an oxygen-free atmosphere.
  • the microwave pyrolysis parameter was set to a reaction temperature of 500 ° C and a microwave power of 750 W. In order to make the lignin pyrolysis reaction more complete, a relatively pure biochar was obtained, and the reaction time was set to 30 minutes. Since lignin is pyrolyzed in the microwave, it is easy to form a block-like biochar product.
  • the lignin-derived biochar produced by microwave pyrolysis is first pulverized into fine powder and then sieved to ensure uniformity of size. Then, the biochar powder was repeatedly washed with deionized water. After washing, it was dried in an oven at 105 ° C for 15 h to remove excess water. This gave a biochar raw material for the preparation of the catalyst.
  • the weighed 10.13 g of Zn(NO 3 ) 2 .6H 2 O was dissolved in excess deionized water, and 40 g of a biochar raw material was added thereto with constant stirring. The solution was placed on a magnetic stirrer and continuously stirred in a water bath at 60 ° C for 6 h.
  • the mixture was filtered, molded, and the formed material was vacuum dried in an electric oven at 105 ° C for 15 h. Then, an oxygen-deficient atmosphere was maintained at a flow rate of 60 mL/min in a nitrogen-hydrogen mixed atmosphere (99:1), and crystallization was carried out at a temperature of 550 ° C for 4 hours to prepare a metal-supported biochar catalyst.
  • XRD characterization was performed to compare the crystal characteristics of the metal zinc modified catalyst and the untreated catalyst, as shown in FIG.
  • the modified molecular sieve catalyst maintains the characteristic pattern of the topological structure of the procatalyst, but a prominent peak formed by the addition of metallic zinc appears, indicating that the modified metallic zinc is loaded into the biochar catalyst.
  • a catalytic pyrolysis experiment was carried out by using a catalytic fixed bed reactor in combination with a microwave pyrolysis apparatus.
  • the raw material used in the test was lignin: firstly weighed 20 g of lignin and 5 g of PE as raw materials in a quartz flask reactor with a capacity of 500 ml, and then added 1 g of activated carbon as a microwave absorbing material and lignin/polyethylene (PE). The mixture was mixed, and the quartz flask reactor was placed in a microwave oven, and 1 g of the prepared catalyst was placed in a catalytic fixed bed reactor.
  • the reaction temperature for setting microwave pyrolysis is 500 ° C, the time is 8 min, and the microwave power is 750 W.
  • the pyrolysis gas is subjected to catalytic reforming reaction through a catalytic fixed bed after microwave pyrolysis reaction, and then rapidly condensed.
  • the bio-oil was collected, and the organic components and catalysts of the bio-oil after the reaction were collected and analyzed by means of GC/MS, SEM and XRD.
  • the microwave pyrolysis experiments of the uncharged catalyst and the added metal zinc modified biochar catalyst were compared. It was found that the catalyst used was significantly more than the bio-oil obtained without the catalyst.
  • the effect of the catalyst on the bio-oil yield was: zinc-bio Carbon catalyst > no catalyst.

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  • Chemical & Material Sciences (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
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Abstract

L'invention concerne un catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation. Le procédé comprend les étapes consistant à: former une matière première de biocharbon de lignine par pyrolyse par micro-ondes. Le sel de zinc pesé est dissous dans de l'eau désionisée en excès, et broyé, lavé, et la poudre de biocharbon séché est ajoutée pendant l'agitation; la solution est agitée en continu à l'aide d'un agitateur magnétique dans un bain d'eau à 60°C pendant 6 h; puis la solution est filtrée et formée, et est séchée pendant 15 h dans un four à 105°C; ensuite, la cristallisation et la formation sont effectuées dans une atmosphère de gaz mixte, d'azote et d'hydrogène (99 :1), dans un four à tube à 550°C, et un catalyseur à base de zinc-biocharbon modifié est ainsi préparé. Le catalyseur modifié augmente le rendement en bio-huile et la sélectivité des aromatiques obtenus par pyrolyse catalytique de lignine, et peut être appliqué à la technologie associée de conversion catalytique de pyrolyse.
PCT/CN2017/107943 2017-06-15 2017-10-27 Catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation WO2018227842A1 (fr)

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CN201710450449.1 2017-06-15

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CN108774538A (zh) * 2018-05-04 2018-11-09 江苏大学 一种获取生物质催化热解中活性积炭组分的方法
CN109370632A (zh) * 2018-11-16 2019-02-22 江苏大学 一种木质素与低密度聚乙烯共热解制备富芳烃燃料油的方法
CN111634902B (zh) * 2020-06-01 2023-03-28 南京博岭节能环保研究院有限公司 一种木质素热解气二次催化重整制备碳纳米管的方法
CN112010359B (zh) * 2020-07-09 2024-02-13 江苏大学 一种NiO/C纳米复合电极材料及制备方法和应用
CN114931953A (zh) * 2022-06-02 2022-08-23 南昌大学 一种生物质转化为烃类化合物的催化剂制备方法

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CN102239112A (zh) * 2008-06-18 2011-11-09 阿肯色大学理事会 碳-金属纳米复合物和其应用
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