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Pd/ZrO2-HZSM-5 bifunctional catalyst and preparation method of Pd/ZrO2-HZSM-5 bifunctional catalyst

A dual-function catalyst, HZSM-5 technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of calorific value, hydrogen-carbon effective ratio and low pH value, and H/C effective ratio. , phenol is difficult to convert and other problems, to achieve the effect of improving catalytic activity, strong hydrogenation capacity, and efficient deoxygenation

Pending Publication Date: 2020-09-15
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with fossil fuels, bio-oil has a high oxygen content, resulting in lower calorific value, effective ratio of hydrogen to carbon, and lower pH value, so that bio-oil cannot directly replace petroleum, and the components of bio-oil must be added. Hydrodeoxygen upgrading
[0003] HZSM-5 molecular sieve has certain aromatization activity and deoxygenation activity, but side reactions such as hydrogenolysis occur during the aromatization process, the effective ratio of H / C decreases, and it is difficult to convert phenolic molecules such as phenol
Pd-based catalysts show good hydrogenation activity for organics, but low deoxygenation activity

Method used

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  • Pd/ZrO2-HZSM-5 bifunctional catalyst and preparation method of Pd/ZrO2-HZSM-5 bifunctional catalyst
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  • Pd/ZrO2-HZSM-5 bifunctional catalyst and preparation method of Pd/ZrO2-HZSM-5 bifunctional catalyst

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Experimental program
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Effect test

Embodiment 1

[0034] Take 4ml of zirconium oxynitrate solution with a concentration of 2mol / L and dissolve it in 15ml of dilute nitric acid, add 1g of HZSM-5 catalyst, stir evenly, slowly add it to 30ml of ammonia solution with a concentration of 4mol / L at room temperature, and keep stirring for 30min , the resulting precipitate was filtered, washed with deionized water until the pH value reached 7, dried at 110 °C for 6 h, and then roasted at 500 °C for 6 h at a rate of 10 °C / min in air atmosphere to obtain ZrO 2 -HZSM-5 bifunctional carrier; grind the carrier and mix it with 2.5ml palladium nitrate aqueous solution containing 2wt.% Pd, keep stirring for 30min, dry at room temperature for 12h, then bake at 400°C for 180min, then bake at 300°C for 120min in a hydrogen atmosphere, Get Pd / ZrO loaded with 2wt.%Pd 2 -HZSM-5 bifunctional catalyst. Using phenol as a model compound of bio-oil, traditional electric heating at 300°C catalyzes the hydrodeoxygenation of phenol, and the conversion rate ...

Embodiment 2

[0036] Take 4ml of zirconium oxynitrate solution with a concentration of 2mol / L and dissolve it in 15ml of dilute nitric acid, add 1g of HZSM-5 catalyst, stir evenly, slowly add it to 30ml of ammonia solution with a concentration of 4mol / L at room temperature, and keep stirring for 30min , the resulting precipitate was filtered, washed with deionized water until the pH value reached 7, dried at 110 °C for 6 h, and then roasted at 500 °C for 6 h at a rate of 10 °C / min in air atmosphere to obtain ZrO 2 -HZSM-5 bifunctional carrier; grind the carrier and mix it with 2.5ml palladium nitrate aqueous solution containing 2wt.% Pd, keep stirring for 30min, dry at room temperature for 12h, then bake at 400°C for 180min, then bake at 300°C for 120min in a hydrogen atmosphere, Get Pd / ZrO loaded with 2wt.%Pd 2 -HZSM-5 bifunctional catalyst. Using phenol as a model compound of bio-oil, 900W microwave catalytic hydrodeoxygenation, the conversion rate of phenol reaches 91%, and the main com...

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Abstract

The invention discloses a Pd / ZrO2-HZSM-5 bifunctional catalyst and a preparation method thereof. A carrier of the Pd / ZrO2-HZSM-5 bifunctional catalyst is ZrO2-HZSM-5, and the mass ratio of ZrO2 to HZSM-5 is 1: 1; an active component of the Pd / ZrO2-HZSM-5 bifunctional catalyst is Pd, and the loading capacity of the Pd is 1%-3% of the mass of the carrier. According to the Pd / ZrO2-HZSM-5 bifunctionalcatalyst and the preparation methodthereof, ZrO2 and HZSM-5 are compounded as a carrier to increase the acidic sites of the catalyst, the diameter range of adsorption molecules is widened; the loadedmetal Pd reduces the activation energy of the C-O bond, and the hydrodeoxygenation catalytic activity of the catalyst is enhanced; the prepared catalyst integrates the respective deoxygenation and hydrogenation advantages of HZSM-5 and ZrO2 so as to form the advantage complementation, and the catalyst has the potential of catalyzing bio-oil to prepare high quality fuels or high added value products, and has strong application prospects.

Description

technical field [0001] The invention relates to a catalyst and a preparation method for hydrodeoxygenation of bio-oil, in particular to a Pd / ZrO 2 -The preparation method of HZSM-5 bifunctional catalyst. Background technique [0002] Due to the rapid development of industry, environmental and energy issues have become increasingly prominent. Extensive use of fossil fuels such as petroleum and coal has resulted in a large amount of polluting gas emissions, resulting in energy crises and environmental pollution. Renewable, carbon-neutral and environmentally friendly alternatives must therefore be developed. Biomass reserves are large, carbon neutral, and renewable. After rapid pyrolysis, pyrolysis bio-oil can be used as a substitute for fossil fuels such as petroleum. It is not only of great significance in terms of energy security, but also does not affect food production. Production premise helps to reduce CO 2 emissions. However, compared with fossil fuels, bio-oil has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/44C10G3/00
CPCB01J29/44C10G3/49C10G3/50B01J2229/18Y02P30/20
Inventor 王珂张磊李敏丁晓君鲁怡黄经纬孙艳婷瞿浩洁胡乐亮
Owner SHANGHAI INST OF SPACE POWER SOURCES
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