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Catalyst for use in catalytic conversion of carbon dioxide into methacrylic acid and application thereof

A carbon dioxide and catalyst technology, applied in the field of greenhouse gas carbon dioxide recycling and energy and environmental catalysis, can solve problems such as unsatisfactory selectivity

Inactive Publication Date: 2010-06-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conversion rate of raw materials and the selectivity of MAA are still not ideal. For example, the conversion rate of IBA is about 10%, and the selectivity of methacrylic acid is 50%. There is still a certain gap from industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1H 6 PV 3 Mo 9 o 40 / CeO 2 Catalyst preparation and performance evaluation

[0048] Weigh 3.58gNa 2 HPO 4 2H 2 O was dissolved in 50ml distilled water and slightly heated to dissolve, and weighed 26.65gNa 2 MoO 4 2H 2 O, dissolved in 60ml of distilled water at 30°C, mixed the two solutions and heated to boiling with an electromagnetic stirrer, and reacted for 30 minutes. Weigh 0.91g vanadium pentoxide and dissolve in 10mL 1mol / dm -3 After the sodium carbonate solution, mix with the above solution and continue to react for 30 minutes. After cooling, adjust the pH to 2.0 with a sulfuric acid solution with a volume ratio of 1:1. Add 50ml of ether and 5ml of sulfuric acid solution with a volume ratio of 1:1 for extraction. Put the solution in two layers, put it in a fume hood for several days, blow out ether, put the solution in a vacuum desiccator at 80°C to evaporate the solvent for 3 hours, cool and crystallize to obtain orange-red crystal H 6 PV 3 M...

Embodiment 2

[0051] Example 2H 5 PW 11 Fe(H 2 O)O 39 / CeO 2 Catalyst preparation and performance evaluation

[0052] Weigh 14.6g phosphotungstic acid H 3 PW 12 o 40 In a three-necked bottle, add 30ml of water to dissolve, and weigh the equimolar FeSO 4 Dissolve the solid in it, slowly add saturated sodium carbonate solution to the solution at a constant temperature of 50°C to adjust the pH to 4.5, and stir at a constant temperature for 30 minutes, filter it into a beaker, evaporate the solvent at 90°C until it becomes semi-viscous, and after a few days it becomes a block Crystals precipitated to obtain H 5 PW 11 Fe(OH 2 )O 39 catalyst. Dry and grind for later use.

[0053] CeO 2 Dry at 200°C for 2 hours before use. Weigh 2.5g of catalyst and dissolve in 30ml of water-ethanol solution with a volume ratio of 1:1, then add 6.0g of CeO 2 , Ultrasonic dispersion at 30°C for 1h, standing still under constant stirring for 24h, drying at 120°C for 2h under vacuum conditions when th...

Embodiment 3

[0055] Example 3: Co 2.0 h 2.0 PMo 9 V 3 o 40 / CeO 2 Preparation and performance evaluation

[0056] Get the prepared H in Example 1 6 PV 3 Mo 9 o 40 , mixed with the nitrate of divalent metal cobalt in the solution according to the stoichiometric ratio, stirred at room temperature for 4.5h, and evaporated the solvent at 90°C to obtain Co 2.0 h 2.0 PMo 9 V 3 o 40 catalyst.

[0057] CeO 2 Dry at 200°C for 2 hours before use. Weigh 2.0g of catalyst and dissolve in 30ml of water-ethanol solution with a volume ratio of 1:1, then add 6.5g of CeO 2 , ultrasonically dispersed at 30°C for 1h, left to stand for 24h under constant stirring, dried at 120°C for 2h under vacuum conditions when the solvent evaporated into a gel, and then roasted at 300°C for 4h to obtain a loaded type with a solid loading capacity of 23.5wt%. catalyst.

[0058] co 2.0 h 2.0 PMo 9 V 3 o 40 / CeO 2 The catalyst performance evaluation experiment was carried out on a quartz tube fixed-bed r...

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Abstract

The invention relates to a catalyst for use in the catalytic conversion of carbon dioxide into methacrylic acid, a method for preparing the same and application thereof and belongs to the technical field of reclamation of greenhouse gas of carbon dioxide and energy environmental catalysis. The cerium oxide loaded type polyoxometallate catalyst consists of the following components in percentage by weight: 15 to 35 percent of polyoxometallate and 65 to 85 percent of cerium oxide; the catalyst catalyzes the reaction of carbon dioxide and propylene, which serve as the reaction raw material gases, to directly synthesize methacrylic acid, the catalyst is high in activity, high in target product selectivity and stable in catalytic property. The process of preparing the catalyst is simple, safe, nontoxic, harmless, pollution-free and convenient in reutilization. Compared with the conventional process, the preparation method has the advantages of mild reaction conditions, simple process, low-priced and wide-sourced raw material gases, pollution-free production process and high economic benefits, is suitable for industrialized production and simultaneously is quite meaningful for the resource recycling of the greenhouse gas of carbon dioxide.

Description

technical field [0001] The invention relates to a catalyst for catalytic conversion of carbon dioxide into methacrylic acid, a preparation method and application thereof, and belongs to the technical fields of greenhouse gas carbon dioxide resource utilization and energy environment catalysis. Background technique [0002] In recent years, the emission of carbon dioxide has increased year by year, aggravating the greenhouse effect and posing a serious threat to the global ecological environment. Although the Kyoto Protocol proposes to restore the emission of carbon dioxide to the level of 1990, the method of physical storage of carbon dioxide can only To temporarily solve its emission problem, the ideal way is to convert carbon dioxide into useful compounds. CO 2 Reacting with hydrocarbons to directly synthesize hydrocarbon oxides is a rational use of CO 2 One of the effective ways, using carbon dioxide and propylene to directly synthesize methacrylic acid (MAA) is an econ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/18C07C57/04C07C51/15
Inventor 王睿杨烽
Owner SHANDONG UNIV
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