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Metal loaded vanadic oxide catalyst and preparation method and application thereof

A vanadium pentoxide catalyst and vanadium pentoxide technology are applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., which can solve the problem of difficult separation of catalysts and products, Poor activity and selectivity, long process route, etc., to achieve the effect of improving activity and product selectivity, optimizing catalytic performance, and simple process

Active Publication Date: 2017-08-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many defects in these methods, such as long process route, poor activity and selectivity, strong corrosion, difficult separation of catalyst and product, harsh conditions, and certain pollution to the environment, etc.

Method used

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  • Metal loaded vanadic oxide catalyst and preparation method and application thereof
  • Metal loaded vanadic oxide catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of vanadium pentoxide catalyst: Weigh 5.85g of ammonium metavanadate and dissolve it in 50ml of deionized water at 60°C, stir until completely dissolved, add 9.60g of citric acid, stir at constant temperature for 30min, and form a dark blue sol Shape; heat up to 90°C, stir at constant temperature to evaporate water until it forms a gel, and keep foaming at 120°C in an oven for 12 hours. After being ground into powder, set the temperature of the muffle furnace at 550°C, and bake in the air atmosphere for 3.5 hours to obtain yellow vanadium pentoxide powder.

Embodiment 2

[0032] Preparation of single metal-supported catalyst: Weigh 5.85g of ammonium metavanadate and dissolve it in 50ml of deionized water at 60°C, stir until completely dissolved, add 9.60g of citric acid, stir at constant temperature for 30min, and form a dark blue sol Slowly add the chloroplatinic acid solution of 0.53g / 100ml in 22.8ml concentration, stir and disperse evenly, then under stirring at room temperature, utilize autosampler to inject the sodium borohydride that concentration is 0.34g / 100ml with the speed of 0.5ml / min Solution 40ml, reduce the loaded metal. Raise the temperature to 90°C, stir at a constant temperature to evaporate water until it forms a gel, and keep it in an oven for 12 hours at 120°C for foaming. After grinding into powder, set the muffle furnace temperature to 550°C, and bake in air atmosphere for 3.5h. The obtained catalyst contains 1wt% platinum, expressed as 1wt%Pt / V 2 o 5 .

[0033] Other conditions remain unchanged, the added chloroplatin...

Embodiment 3

[0035]Preparation of bimetallic supported catalyst: Weigh 5.85g of ammonium metavanadate and dissolve it in 50ml of deionized water at 60°C, stir until completely dissolved, add 9.60g of citric acid, stir at constant temperature for 30min, and form a dark blue sol Slowly add copper nitrate aqueous solution containing 0.05g copper ions and 22.8ml concentration of chloroplatinic acid solution of 0.53g / 100ml, stir and disperse evenly, then under stirring at room temperature, utilize an autosampler to inject at a speed of 0.5ml / min 80ml of sodium borohydride solution with a concentration of 0.34g / 100ml was used to reduce the loaded metal. Raise the temperature to 90°C, stir at a constant temperature to evaporate water until it forms a gel, and keep it in an oven for 12 hours at 120°C for foaming. After being ground into powder, set the temperature of the muffle furnace to 550°C, and bake in the air atmosphere for 3-3.5h. The resulting catalyst contains 1% platinum, expressed as 1...

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Abstract

The invention discloses a metal loaded vanadic oxide catalyst and a preparation method and application thereof. The catalyst uses vanadic oxide as active ingredients; one or several kinds of metals of platinum, palladium, ruthenium and copper are added as loading metal ingredients. The preparation method comprises the following steps of sequentially dissolving vanadic salts, metal salts and complexing agents into water to prepare sol; performing stirring and heating to evaporate water to form gel; performing drying, roasting and grinding to obtain a finished product. The catalyst can efficiently degrade microcrystalline cellulose under the conditions of the temperature being 200 to 300 DEG C and the hydrogen pressure being 1 to 10 MPa; micromolecular alcohol substances are prepared. The preparation method of the catalyst is simple; the cost is low; the process achieves green and environment-friendly effects; the large-scale production is easy; the hydrogenation reaction conditions are mild; the cellulose conversion is high; the selectivity is good; a product is an important chemical engineering raw material.

Description

technical field [0001] The invention relates to a metal catalyst and its preparation and application, in particular to a metal-loaded vanadium pentoxide catalyst, its preparation and its application in cellulose hydrogenation hydrolysis. Background technique [0002] Energy issues have been a common concern of human society for a long time. Since the 1970s, with the increasing shortage of non-renewable resources such as petroleum, the development and utilization of renewable resources has become an urgent task for us. Biomass resources are the most extensive renewable resources in the world, including cellulose, hemicellulose, lignin and starch. Among them, cellulose accounts for the largest proportion, accounting for about 40% of the total biomass. Therefore, the study of its conversion and utilization technology will become the key to biomass conversion technology. [0003] At present, the utilization methods of cellulose mainly include enzymatic degradation, acid degrada...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648B01J23/89C07C29/00C07C31/22C07C31/20
CPCB01J23/6482B01J23/898C07C29/00C07C31/225C07C31/202C07C31/205
Inventor 周建成陈凌宇舒位欣魏凌飞李乃旭秦一玮
Owner SOUTHEAST UNIV
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