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Catalyst for splitting decomposition of biomass tar and preparation method thereof

A tar cracking and catalyst technology, which is applied in physical/chemical process catalysts, hydrocarbon oil cracking, molecular sieve catalysts, etc., can solve the problems of catalyst cracking activity that needs to be further improved, catalyst acid centers are limited, etc., and achieve high tar cracking activity and stability , Improve the effect of anti-coke performance and high dispersibility

Inactive Publication Date: 2014-02-05
ENERGY RES INST CO LTD HENAN ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned catalysts all use alumina as a carrier, and the acid centers of the catalyst are limited, so the cracking activity of the catalyst needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] ① Take a BET method with a specific surface area of ​​350m 2300g HZSM-5 molecular sieve with a silicon-aluminum ratio of 38, a pore size of 0.55nm, a relative crystallinity ≥ 95%, and a residual sodium content ≤ 0.1wt%, mixed evenly with 3.0g of turnip powder and 3.0g of CMC, and added 100g of concentrated nitric acid solution The pore volume of peptization is 0.40g / ml, and the specific surface area of ​​BET method is 250 m 2 / g of small-pore alumina binder, after kneading into a group, put it into an extruder to extrude a hollow cylindrical strip with a maximum outer diameter of 1.6mm, then dry it at 80°C for 3 hours, and then dry it in the air at 110°C 10h, and then calcined at 500°C for 8h to obtain a catalyst carrier.

[0030] ② Take 90 g of the catalyst carrier obtained in step ① and immerse it in 50 ml of a cerium nitrate solution with a concentration of 1.15 mol / L. The immersion time at room temperature is 16 hours. After drying for 2 hours at 80° C. at a vacuum...

Embodiment 2

[0035] ① Take a BET method with a specific surface area of ​​380m 2 280g of HZSM-5 molecular sieve with a silicon-aluminum ratio of 50, a pore size of 0.56nm, a relative crystallinity ≥ 95%, and a residual sodium content of ≤ 0.1wt%, mixed well with 3.0g of turnip powder and 3.0g of CMC, and added 120g of concentrated nitric acid solution The pore volume of peptization is 0.40g / ml, and the specific surface area of ​​BET method is 280 m 2 / g of small-pore alumina binder, after kneading into a group, put it into an extruder to extrude a hollow cylindrical strip with a maximum diameter of 3.5mm, then dry it at 80°C for 2h, and then dry it in air at 110°C for 12h , and then calcined at 500° C. for 10 h to obtain a catalyst carrier.

[0036] ② Take 90 g of the catalyst carrier obtained in step ① and immerse it in 50 ml of a cerium nitrate solution with a concentration of 1.15 mol / L. The immersion time at room temperature is 20 h. After drying at 80 °C for 3 h at a vacuum degree of...

Embodiment 3

[0041] ① Take 20 g of the catalyst carrier obtained in Step ② of Example 1 and immerse in 10 ml of a mixed solution containing 0.13 g of ruthenium trichloride, 12.92 g of nickel nitrate and 2.97 g of copper nitrate, and soak for 24 hours at room temperature. After drying at 0.06MPa for 2h, continue to dry at 80°C for 2h at a vacuum of 0.08MPa, and then calcined at 550°C for 5h to obtain the catalyst.

[0042] ②Reduce the prepared oxidized catalyst at 500°C for 2 hours with the raw material gas of biomass gasification to prepare the catalyst.

[0043] Weigh 18.00g of the catalyst of this embodiment, the content of the active component NiO supported by the catalyst is 13.5 wt % of the total amount of the catalyst, the content of CuO is 5.1 wt %, and the content of RuO 2 Content is 0.27 wt %, CeO 2 The content is 8.1 wt%.

[0044] Before use, the prepared catalyst was reduced at 500°C for 2h with the raw gas of biomass gasification, the operating temperature of the catalyst w...

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Abstract

The invention discloses a catalyst for splitting decomposition of biomass tar. The catalyst comprises the following components according to weight percent: 0.1-1% of RuO2, 5-15% of NiO, 1-6% of CuO, 5-20% of CeO2, and the balance of catalyst carrier. The invention also discloses a preparation method for the catalyst. The method comprises steps of adding an HZSM-5 molecular sieve into an aluminum oxide binder, adding a pore former and an assisting extrusion agent, kneading and grinding into balls, extruding into strips, drying, and roasting to obtain the catalyst carrier; then respectively loading metallic elements through a saturated impregnation method, drying, and roasting to obtain the catalyst. The catalyst has high activity in tar splitting decomposition, and has strong stability and anti-carbon accumulation performance; the catalyst carrier is of a hollow strip shape, so that the device is guaranteed to run smoothly; the catalyst is obtained by reduction of feed gas generated by biomass gasification, so that the processes are greatly simplified, and the catalyst is applicable to industrial production.

Description

technical field [0001] The invention belongs to the technical field of catalysts for biomass energy, and in particular relates to a catalyst for cracking biomass tar and a preparation method thereof. Background technique [0002] Biomass energy is energy containing energy, which is similar to conventional fossil energy such as coal, oil, and natural gas in many aspects, and has the characteristics of being storable and transportable. Biomass energy resources come from all organic substances formed by photosynthesis of green plants directly or indirectly, including animals, plants, microorganisms, and the excrement and metabolites produced by these organisms. For a long time, the utilization of biomass energy resources has been dominated by direct combustion, which is not only inefficient, but also pollutes the environment. With the development of science and technology, biomass energy resources can be converted and efficiently utilized through various technologies to genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46C10G47/20
Inventor 李顺清雷廷宙朱金陵何晓峰杨延涛任素霞
Owner ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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