Mesoporous carbon-supported composite metal oxide catalyst and preparation method thereof

A composite metal and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbons, etc., can solve problems such as difficult industrialization and application, limited active life, and avoid Deep oxidation, good active life, high surface area effect

Inactive Publication Date: 2012-06-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts mainly include V-Mg-O metal oxides (Catalysis Communications, 2009, Vol. 11, pp. 132-136) and activated carbon-supported chromium oxide, iron oxide and nickel oxide systems (US20040181107; Chinese Chemical Letters, 2008, Vol. 19, No. 1059–1062; Applied Catalysis A: General, 1998, Vol. 168, pp. 243–250; Journal of Molecular Catalysis A: Chemical, 2010, Vol. In the hydrogen process, there are defects such as limited active life and difficulty in industrial promotion and application.

Method used

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  • Mesoporous carbon-supported composite metal oxide catalyst and preparation method thereof
  • Mesoporous carbon-supported composite metal oxide catalyst and preparation method thereof
  • Mesoporous carbon-supported composite metal oxide catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 1.50 g of nickel acetate, 1.11 g of oxalic acid and 3.05 g of citric acid in 35 mL of water to form a concentration of 0.24 mol L of nickel acetate -1 , oxalic acid and citric acid to a green solution with a molar ratio of 3.3 to nickel acetate, adding a surface area of ​​1320 m to the above solution 2 g -1 6.42 g of CMK-3 mesoporous carbon was stirred in a constant temperature water bath at 70°C for 10 minutes, dried at room temperature for 8 hours to form a paste, dried at 150°C for 3 hours, and calcined at 600°C for 5 hours in a nitrogen atmosphere to obtain mesoporous carbon The supported NiO composite catalyst was determined to have a NiO mass percentage of 8.4%. The prepared mesoporous carbon-supported NiO composite catalyst was loaded into the reactor, and a mixed gas of isobutane and carbon dioxide with a mass ratio of 1:6 preheated to 340 °C was introduced at a space velocity of 5 L / (g cat h) and a reaction temperature of 630°C, the conversion rate...

Embodiment 2

[0043] Dissolve 2.92 g of nickel nitrate, 1.62 g of oxalic acid and 3.28 g of citric acid in 25 mL of water to make nickel nitrate with a concentration of 0.64 mol L -1 , oxalic acid and citric acid substances in a green solution with a ratio of 2.2 to that of nickel nitrate substances, adding a surface area of ​​1320 m 2 g -1 4.78 g of CMK-3 mesoporous carbon was stirred in a constant temperature water bath at 70°C for 20 minutes, dried at room temperature for 10 hours to form a paste, dried at 160°C for 4 hours, and calcined at 650°C for 3 hours in a nitrogen atmosphere to obtain mesoporous carbon The supported NiO composite catalyst was determined to be 18.4% by mass of NiO. The prepared mesoporous carbon-supported NiO composite catalyst was loaded into the reactor, and a mixed gas of isobutane and carbon dioxide with a mass ratio of 1:5 preheated to 340 °C was introduced at a space velocity of 6 L / (g cat h) and a reaction temperature of 620°C, after 1 hour of reaction,...

Embodiment 3

[0046] Dissolve 3.86 g of ferric nitrate, 0.51 g of oxalic acid and 4.68 g of citric acid in 40 mL of water to make ferric nitrate with a concentration of 0.40 mol L 1 , oxalic acid and citric acid substances in a red solution with a ratio of 1.9 to that of ferric nitrate substances, adding a surface area of ​​1020 m to the above solution 2 g -1 16.63 g of CMK-1 mesoporous carbon, stirred in a constant temperature water bath at 60°C for 20 minutes, dried at room temperature for 8 hours to form a paste, dried at 160°C for 3 hours, and calcined at 680°C for 2 hours in a helium atmosphere to obtain mesoporous carbon Loaded Fe 2 o 3 Composite catalyst, determination of Fe 2 o 3 The mass percentage content is 6.4%. The prepared mesoporous carbon supported Fe 2 o 3 The composite catalyst was loaded into the reactor, and a mixed gas of isobutane and carbon dioxide with a mass ratio of 1:4 was introduced into the reactor preheated to 380°C, and the space velocity was 3 L / (g ca...

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Abstract

The invention discloses a mesoporous carbon-supported composite metal oxide catalyst and a preparation method thereof. Compared with the prior art, the mesoporous carbon-supported composite metal oxide catalyst has a high specific surface area and a large aperture size, is conducive to rapid diffusion of reactants and products in an aperture channel, avoids deep oxidation, coking and carbon deposition, and has good catalyst activity and a long catalyst life.

Description

technical field [0001] The invention relates to a catalyst for producing isobutene by oxidizing isobutane and dehydrogenating carbon dioxide, in particular to a mesoporous carbon-supported composite metal oxide catalyst and a preparation method thereof. Background technique [0002] Isobutylene is an important organic chemical raw material. It can not only be used to synthesize elastomers such as butyl rubber, isoprene rubber and polyisobutylene rubber, but also to produce various fine chemicals such as methyl methacrylate and tert-butyl alcohol. Taste. The traditional sources of isobutene mainly come from naphtha steam cracking ethylene units and refinery fluid catalytic cracking units, but the scale and output have been difficult to meet the growing industrial demand. For this reason, new isobutene production technologies have been continuously sought and introduced successively at home and abroad, among which isobutane dehydrogenation is one of the most competitive techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/745B01J23/75B01J23/83B01J23/78B01J23/847B01J27/185B01J21/18C07C11/09C07C5/333
Inventor 刘经伟阚林李泽壮陈绍辉杨爱武柏基业李晓强刘丽娟
Owner CHINA PETROLEUM & CHEM CORP
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