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A method for complete combustion of heavy components of bio-oil at low temperature using cu-mn-based supported monolithic catalysts

A monolithic catalyst and heavy component technology, applied in the direction of combustion using catalytic materials, combustion methods, molecular sieve catalysts, etc., can solve the problems of high cost of precious metals, deactivation of activity, easy reduction of catalytic activity, etc.

Active Publication Date: 2017-04-26
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In general, noble metal catalysts have high low-temperature activity for complete catalytic oxidation of organic matter. However, the scarcity and high cost of noble metals and the reasons why the catalytic activity is easy to reduce and deactivate during the catalytic process (Catalysis Today176 (2011) 474- 477; Applied Catalysis B: Environmental 132–133 (2013) 353–362), leading to interest in transition metal oxide catalysts such as Cr 2 o 3 , CuO, Mn 2 o 3 , V 2 o 5 ,Co 3 o 4 , Mn 3 o 4 , WO 3 , Ti 2 o 3 etc. (U.S.Patent3972979; U.S.Patent5283041; US ​​6906208 B2, CN101240203 A; Nature384(1996)341; Applied Catalysis B:Environmental132–133(2013)353–362.))

Method used

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  • A method for complete combustion of heavy components of bio-oil at low temperature using cu-mn-based supported monolithic catalysts
  • A method for complete combustion of heavy components of bio-oil at low temperature using cu-mn-based supported monolithic catalysts

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: 6Cu10Mn (wt%) / SBA-15 catalyst preparation and its combustion model mixture performance experiment

[0026] (1) Preparation of SBA-15 mesoporous molecular sieve carrier by hydrothermal synthesis: 3.65-4.0 g of triblock surfactant P 123 (Aldrich, EO 20 PO 70 EO 20 , with a molecular weight of 5800) was dissolved in 80-95g deionized water, and then 3.0-4mol / L HCl solution and tetraethylorthosilicate (TEOS) were added; P 123 , HCl, H 2 O. The mass ratio of TEOS is 1:1.5~2.0:36.10:2.13, stir vigorously for 24h, transfer the mixed solution to a Teflon bottle after the reaction, crystallize at 90~110°C for 1~2d, then filter, Washing and drying, the resulting product is calcined at 500-650°C for 4-6 hours to remove the template agent to obtain a surface area of ​​about 650-720m 3 / g, SBA-15 mesoporous molecular sieve white powder with a pore size of 5-10nm.

[0027] (2) Preparation of 6Cu10Mn / SBA-15 catalyst by ethylene glycol dispersion-ultrasonic assisted ...

Embodiment 2、6

[0030] Embodiment 2, 6Cu10MnzM / SBA-15 catalyst preparation and performance experiment

[0031] (1) with (1) in the embodiment 1 method;

[0032] (2) Preparation of 6Cu10MnzM / SBA-15 catalyst by ethylene glycol dispersion-ultrasonic assisted equal volume impregnation method: Cu(NO 3 ) 2 ·3H 2 O and 50% Mn(NO 3 ) 2 (Molar ratio Cu / Mn=0.5, Mn / M=2.0) and the nitrate of M (Co, V, Cr, Fe, Ni etc.) are dissolved in the mixed solution of water and ethylene glycol (wherein, mass ratio m SBA-15 :m 水 =1:3.5~5, the molar ratio of active metal to ethylene glycol is 1.0~5.0:1), then add 3g (the mass ratio of active metal to SBA-15 mesoporous molecular sieve is 16~37.5%) step (1) preparation The SBA-15 is stirred evenly, placed under ultrasonic conditions for 0.5-2 hours to form a uniform suspension, and then dried at 80-100°C for 5-8 hours. After grinding, the temperature is programmed to rise to 450-650°C and calcined for 4-6 hours to obtain 6Cu10MnzM / SBA-15 catalyst.

[0033] (3) P...

Embodiment 3、4

[0035] Embodiment 3, 4Cu10Mn5.5Co / SBA-15 catalytic combustion model mixture performance experiment

[0036] (1) 4Cu10Mn5.5Co / SBA-15 is prepared with (1)~(3) in the embodiment 1 method;

[0037] (2) Catalyst activity evaluation is the same as (4) in the embodiment 1 method.

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Abstract

The invention discloses a method for low-temperature complete combustion of bio-oil heavy components by the use of a Cu-Mn base supported monolithic catalyst. By a technological condition that an xCuyMnzM / SBA-15 composite oxide cordierite ceramic monolithic catalyst with a low-temperature activity is used to catalyze a model of a bio-oil heavy components mixture including guaiacol, levoglucosan, methanol and water mixed solution (guaiacol represents benzene oxygenate in the heavy components, levoglucosan represents carbohydrate in the heavy components, and methanol and water are used as solvents for homogeneous mixing of two model compounds), exploration and research are performed to obtain a catalyst system and technological conditions suitable for low-temperature oriented conversion of methanol-soluble viscous real bio-oil heavy components to CO2 and H2O, and low-temperature complete conversion of bio-oil heavy components is realized.

Description

[0001] Technical field: [0002] The invention relates to a method for completely burning heavy components of bio-oil at low temperature by using a Cu-Mn-based supported monolithic catalyst. [0003] Background technique: [0004] The heavy components in bio-oil are mainly composed of relatively large molecular weight phenols, benzene-based aldehydes and ketones, and sugars. The components have a high calorific value and are dominant thermal fuel components. Combustion of heavy components as direct liquid fuel requires a combustion temperature of 1000°C or even higher, resulting in the polymerization of components in the heavy components before the light-off temperature, insufficient combustion, and easy precipitation of carbon. At the same time, it causes problems such as easy coking of the burner head and nozzle, easy accumulation of dust on the pipe wall, and corrosion of equipment. Catalytic combustion can catalyze the conversion of oxidized reactants into non-polluting pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03F23C13/08
Inventor 张琦吕微王铁军马隆龙张兴华章青徐莹王晨光
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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