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Application and preparation method of a perovskite catalyst in catalytic carbon dioxide hydrogenation formic acid

A technology for catalyzing carbon dioxide and carbon dioxide, applied in the preparation of organic compounds, chemical elements of heterogeneous catalysts, preparation of carboxylate, etc., can solve the problems of low TON value, harsh reaction conditions, product decomposition, etc., and achieve long reaction time. , The effect of high reactivity and high TON

Active Publication Date: 2022-06-21
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the commonly used catalysts for catalyzing the hydrogenation of carbon dioxide to formic acid are homogeneous and heterogeneous. Among them, the turnover number (TON) value of the homogeneous catalyst is high, but there are subsequent separation problems, and changes in temperature and pressure may lead to the decomposition of the product.
Heterogeneous catalysts are easy to separate, but compared with homogeneous catalysts, the TON value is not high and the reaction conditions are harsh

Method used

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  • Application and preparation method of a perovskite catalyst in catalytic carbon dioxide hydrogenation formic acid
  • Application and preparation method of a perovskite catalyst in catalytic carbon dioxide hydrogenation formic acid
  • Application and preparation method of a perovskite catalyst in catalytic carbon dioxide hydrogenation formic acid

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Embodiment 1

[0027] A perovskite catalyst for catalyzing the hydrogenation of carbon dioxide to formic acid, the A site of the perovskite is La, the B site is Mn and Pd, and the mass fraction of Pd is 1.74wt% of the perovskite.

[0028] The above-mentioned preparation method of the perovskite catalyst for catalyzing carbon dioxide hydrogenation to produce formic acid specifically comprises the following steps:

[0029] Dissolve 1.7320g lanthanum nitrate hexahydrate, 1.5370g anhydrous citric acid, 2.3379g ethylenediaminetetraacetic acid, 0.9639g tetrahydrate manganese nitrate and 0.0426g dihydrate palladium nitrate in 30mL deionized water, stir rapidly until the solid is completely dissolved, Ammonia water was added dropwise to the mixed solution to adjust the pH value of the solution to about 8; at this time, the solution was stirred at 550 r / min, heated at 80 °C, evaporated excess liquid to form a viscous gel, and the magnet was taken out; placed in an oven at 170 Dry at ℃ for 12h, and gr...

Embodiment 2

[0032] A perovskite catalyst for catalyzing carbon dioxide hydrogenation to formic acid, the A site of the perovskite is La, the B site is Fe and Pd, and the mass fraction of Pd is 1.74wt%.

[0033] The above-mentioned preparation method of the perovskite catalyst for catalyzing carbon dioxide hydrogenation to produce formic acid specifically comprises the following steps:

[0034] Dissolve 1.7320g lanthanum nitrate hexahydrate, 1.5370g anhydrous citric acid, 2.3379g ethylenediaminetetraacetic acid, 1.5514g nonahydrate ferric nitrate and 0.0426g dihydrate palladium nitrate in 30mL deionized water, stir rapidly until the solid is completely dissolved, Ammonia water was added dropwise to the mixed solution to adjust the pH value of the solution to about 8; at this time, the solution was stirred at 550 r / min, heated at 80 °C, evaporated excess liquid to form a viscous gel, and the magnet was taken out; placed in an oven at 170 Dry at ℃ for 12h, naturally cool and grind to obtain ...

Embodiment 3

[0038] A perovskite catalyst for catalyzing carbon dioxide hydrogenation to formic acid, the A site of the perovskite is La, the B site is Co and Pd, and the mass fraction of Pd is 1.74wt%.

[0039] The above-mentioned preparation method of the perovskite catalyst for catalyzing carbon dioxide hydrogenation to produce formic acid specifically comprises the following steps:

[0040] Dissolve 1.7320g lanthanum nitrate hexahydrate, 1.5370g anhydrous citric acid, 2.3379g ethylenediaminetetraacetic acid, 1.1176g cobalt nitrate hexahydrate and 0.0426g palladium nitrate dihydrate in 30mL deionized water, stir rapidly until the solid is completely dissolved, Ammonia water was added dropwise to the mixed solution to adjust the pH value of the solution to about 8; at this time, the solution was stirred at 550 r / min, heated at 80 °C, the excess liquid was evaporated to form a viscous gel, and the magnet was taken out; placed in an oven, 170 Dry at ℃ for 12h, naturally cool and grind to o...

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Abstract

An application and preparation method of a perovskite catalyst in catalyzing the hydrogenation of carbon dioxide to produce formic acid. The perovskite catalyst is a perovskite composed of A-site rare earths and B-site transition metals in a certain proportion. The A-site rare earths include lanthanides. The B-position transition metal includes at least one of chromium, manganese, iron, cobalt and nickel and at least one of the noble metal ruthenium, rhodium, palladium, iridium and platinum, and the composition molar ratio of the A-position rare earth and the B-position transition metal is 0.8: 1-1:0.8, the mass fraction of noble metal is 0.01wt%-4wt%. Dissolve the corresponding A-site metal nitrate, B-site metal nitrate, EDTA and citric acid in water, heat and stir, and adjust to weak alkalinity; heat and stir, and dry, roast, and reduce the obtained sol to make part of the B-site The metal is reduced and precipitated to obtain a perovskite catalyst for hydrogenation of carbon dioxide to form formic acid, which has high catalytic activity and mild reaction conditions.

Description

technical field [0001] The invention relates to the field of catalytic hydrogenation, in particular to the application and preparation method of a perovskite catalyst in the catalytic hydrogenation of carbon dioxide to produce formic acid. Background technique [0002] The catalytic conversion of carbon dioxide into high value-added chemicals or fuels can not only reduce the content of carbon dioxide in the atmosphere, alleviate the greenhouse effect, but also alleviate the energy crisis caused by the consumption of non-renewable energy, which has important practical significance. Catalytic hydrogenation can realize rapid material transformation in one step under mild reaction conditions. Therefore, converting carbon dioxide into important fuels or chemicals by catalytic hydrogenation is an effective way to realize the utilization of carbon dioxide resources. [0003] By comparing the production economics of different products of carbon dioxide hydrogenation (such as methan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/00C07C53/02B01J23/656B01J23/89
CPCC07C51/00B01J23/002B01J23/6562B01J23/894B01J2523/00C07C53/02B01J2523/3706B01J2523/72B01J2523/824B01J2523/845B01J2523/828B01J2523/847B01J2523/842
Inventor 李建辉廖雪娟王慧敏李伟鹏张立忠
Owner XIAMEN UNIV
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