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Biomass gasification tar cracking composite catalyst and preparation method thereof

A composite catalyst and tar cracking technology, applied in the field of biomass energy utilization, can solve problems such as unsatisfactory effects, and achieve the effects of good strength, simple application process and high catalytic activity

Inactive Publication Date: 2009-04-01
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But simply relying on a single catalyst to catalyze the cracking of tar in biogas, the effect is not very ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Preparation of binder: according to mass ratio Ni:Al 2 O 3 =10:100 ratio Weigh 4.96g of Ni(NO 3 ) 2 ·6H 2 O crystals, dissolved in 4mL of distilled water, add 10g of Al 2 O 3 The powder is immersed in a water bath at a constant temperature of 40°C for 2 hours, dried in a constant temperature box at 105°C to form a light green powder, and then baked at 700°C for 2 hours;

[0017] (2) Dolomite pretreatment: pulverize dolomite into powder below 200 mesh;

[0018] (3) Preparation of composite catalyst carrier: the Fe 2 O 3 Compared with the dolomite powder in step (2) by mass ratio Fe 2 O 3 :Dolomite=10:95 ratio, weigh Fe 2 O 3 8.6g powder, 81.4g dolomite powder, mix well, add 9g of the binder made in step (1), and then add 18mL nitric acid with a mass concentration of 5%, mix well, extrude and shape, and after natural drying, 105 Dry it at ℃ for 20h, then put it in a muffle furnace to slowly increase the temperature, calcinate at 400℃ for 1h, and increase it to 900℃ for 4h...

Embodiment 2

[0022] (1) Preparation of binder: Ni:Al according to mass ratio 2 O 3 =15:100 ratio Weigh 7.43g Ni(NO 3 ) 2 ·6H 2 O crystals, dissolved in 5mL of distilled water, add 10g of Al 2 O 3 The powder is immersed in a water bath at a constant temperature of 40°C for 4 hours, and dried in a constant temperature box at 105°C to form a light green powder, and then baked at 700°C for 4 hours;

[0023] (2) Dolomite pretreatment: pulverize dolomite into powder below 200 mesh;

[0024] (3) Preparation of composite catalyst carrier: the Fe 2 O 3 Compared with the dolomite powder in step (2) by mass ratio Fe 2 O 3 :Dolomite=5:95 ratio, weigh Fe 2 O 3 4.5g of powder and 85.5g of dolomite powder, mix well, add 9g of the binder made in step (1), and then add 5mL of 15% nitric acid, mix well, extrude, and dry naturally at 105℃ Dry for 24h, then put it in a muffle furnace to slowly heat up, calcinate at 400℃ for 2h, and heat up to 900℃ for 6h;

[0025] (4) Active component solution impregnation: Use e...

Embodiment 3

[0034] (1) Preparation of binder: Ni:Al according to mass ratio 2 O 3 = 12: 100 ratio to weigh Ni (NO 3 ) 2 ·6H 2 O crystals, dissolved in distilled water, add Al 2 O 3 The powder is immersed in a water bath at a constant temperature of 40°C for 3 hours, and dried in a constant temperature box at 105°C to produce a light green powder, and then baked at 700°C for 3 hours;

[0035] (2) Dolomite pretreatment: pulverize dolomite into powder below 200 mesh;

[0036] (3) Preparation of composite catalyst carrier: the Fe 2 O 3 Compared with the dolomite powder in step (2) by mass ratio Fe 2 O 3 :Dolomite=5:95 ratio, weigh Fe 2 O 3 Powder and dolomite powder, mix evenly, add accounted for Fe 2 O 3 And 12% of the total mass of dolomite to the binder made in step (1), then add 20mL of nitric acid with a concentration of 12%, mix well, extrude and shape, after natural drying, dry at 105°C for 34h, then put it in Slowly heat up in the muffle furnace, calcinate at 400℃ for 1.5h, and heat up to...

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Abstract

The invention provides a preparation method of a biomass gasified tar cracking composite catalyst, comprising the following steps: first, the preparation of a binder: Ni(NO3)2.6H2O crystal and Al2O3 powder are weighed, the Al2O3 powder is added in the water solution of the Ni(NO3)2.6H2O crystal, immersed for 2h-4h at constant temperature water bath of 40 DEG C, dried into light green powder and calcinated; second, the pretreatment of dolomite: the dolomite is ground into powder of 200 meshes below; third, the preparation of a carrier of the composite catalyst: Fe2O3 and the dolomite powder are mixed uniformly and are added with the binder and 5-20mL of nitric acid to be mixed +-<*> uniformly, and the mixture is extruded to be molded, dried naturally, dried at 105 DGE C, calcinated under 400 DEG C and then calcinated at 900 DEG C; forth, the solution immersion of active components: Ni(NO3)2 ethanol solution is used for immersing the carrier of the composite catalyst, and after dried, the carrier is calcinated at 600-800 DGE C. the composite catalyst has the advantages of high catalytic activity, good strength, practical application and simple process.

Description

Technical field [0001] The invention relates to the field of biomass energy utilization, in particular to a preparation method of a catalyst for biomass gasification tar cracking. Background technique [0002] Biomass resources are the only renewable carbon resources that can be converted into conventional liquid and gaseous fuels and other chemical raw materials or products. Because of its rich resources, renewable and environmentally friendly characteristics, it is valued by people. The research and development of biomass pyrolysis and gasification technology is an important aspect of biomass energy conversion technology and one of the effective ways to use biomass energy cleanly and efficiently. [0003] In the process of pyrolysis and gasification, biomass mainly produces CO and H 2 , CO 2 , CH 4 , H 2 O and N 2 Other gases, including some organic and inorganic impurities and particles. The organic matter produced in the process of biomass gasification includes small molecula...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/745B01J21/16C10C1/19
Inventor 孙云娟蒋剑春应浩戴伟娣
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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