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Preparation method of metal-free catalyst for room-temperature efficient catalytic oxidation desulfurization

A catalytic oxidative desulfurization, metal-free technology, used in metal/metal oxide/metal hydroxide catalysts, sulfur preparation/purification, physical/chemical process catalysts, etc. Long process and other problems, to achieve the effect of novel structure, wide source of raw materials and simple operation process

Active Publication Date: 2014-09-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of mesoporous carbon materials generally adopts the organic template or silicon template method, which has a long operation process and high raw material costs, making it difficult to realize industrial production.

Method used

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  • Preparation method of metal-free catalyst for room-temperature efficient catalytic oxidation desulfurization
  • Preparation method of metal-free catalyst for room-temperature efficient catalytic oxidation desulfurization
  • Preparation method of metal-free catalyst for room-temperature efficient catalytic oxidation desulfurization

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Effect test

Embodiment 1

[0042] Such as figure 2 As shown, a method for preparing a metal-free catalyst for efficient catalytic oxidation desulfurization at room temperature of the present invention, the specific preparation process is as follows:

[0043] (1) Disperse 12 g of ferric nitrate in 600 mL of distilled water to obtain an aqueous ferric nitrate solution with a concentration of 20 mg / mL;

[0044] (2) 60 g of nano-calcium carbonate is added in the above-mentioned ferric nitrate aqueous solution, and magnetically stirred for 24 h to make it fully impregnated, and the used nano-calcium carbonate is a small particle with a particle diameter of 20-60 nm;

[0045] (3) above-mentioned impregnation mixture is filtered, and vacuum-dried, obtains the nano-calcium carbonate impregnated iron nitrate;

[0046] (4) Using nano-calcium carbonate impregnated with ferric nitrate as a template, pyridine as a carbon source, inert gas as a protective gas, hydrogen as a reducing gas, and introducing a carbon s...

Embodiment 2

[0059] Such as figure 2 As shown, a method for preparing a metal-free catalyst for efficient catalytic oxidation desulfurization at room temperature of the present invention, the specific preparation process is as follows:

[0060] (1) Disperse 6 g of ferric nitrate in 600 mL of distilled water to obtain an aqueous ferric nitrate solution with a concentration of 10 mg / mL;

[0061] (2) 60 g of nano-calcium carbonate is added in the above-mentioned ferric nitrate aqueous solution, and magnetically stirred for 24 h to make it fully impregnated, and the used nano-calcium carbonate is a small particle with a particle diameter of 20-60 nm;

[0062] (3) above-mentioned impregnation mixture is filtered, and vacuum-dried, obtains the nano-calcium carbonate impregnated iron nitrate;

[0063] (4) Using nano-calcium carbonate impregnated with iron nitrate as a template, a mixture of pyridine and anthracene oil (mass ratio 1:1) as a carbon source, an inert gas as a protective gas, and h...

Embodiment 3

[0070] Such as figure 2 As shown, a method for preparing a metal-free catalyst for efficient catalytic oxidation desulfurization at room temperature of the present invention, the specific preparation process is as follows:

[0071] (1) Disperse 6 g of ferric chloride in 600 mL of aqueous ethanol (the volume ratio of ethanol to distilled water is 1:2) to obtain a ferric chloride solution with a concentration of 10 mg / mL;

[0072] (2) 60 g of nano-calcium carbonate is added in the above-mentioned iron chloride solution, and magnetically stirred for 24 h to make it fully impregnated, and the used nano-calcium carbonate is a small particle with a particle diameter of 20-60 nm;

[0073] (3) above-mentioned impregnation mixture is filtered, vacuum-dried, obtains the nano-calcium carbonate impregnated ferric chloride;

[0074](4) Using nano-calcium carbonate impregnated with ferric chloride as a template, pyridine as a carbon source, inert gas as a protective gas, and hydrogen as ...

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Abstract

The invention provides a preparation method of a metal-free catalyst for room-temperature efficient catalytic oxidation desulfurization and belongs to the technical field of preparation of a functional catalytic material and environment-friendly catalytic application. The preparation method comprises the following steps: by taking nano calcium carbonate immersed with different amounts of iron salts as a template and selecting a suitable carbon source substance, preparing a carbon nano cage-carbon nano tube-residual template composite material by using a two-section type chemical vapor deposition method; then removing the template by using diluted hydrochloric acid to obtain a carbon nano cage-carbon nano tube compound. The compound is treated by a certain amount of alkali to be used a metal-free desulfurization catalyst and has an excellent catalytic oxidation hydrogen sulfide removing performance at a room temperature; monomer sulfur generated by catalysis can be recycled. The preparation method is simple and convenient to operate and low in cost; the catalyst has strong catalytic desulfurization activity and high selectivity and is easy to regenerate; a catalytic product can be recycled; the metal-free catalyst has good economic benefits and industrial application prospect.

Description

[0001] technical field [0002] The invention belongs to the technical field of functional catalytic material preparation and environment-friendly catalytic application, and in particular relates to a method for preparing a metal-free catalyst for efficient catalytic oxidation desulfurization at room temperature. Background technique [0003] Hydrogen sulfide (H 2 S) is a common toxic and harmful acid gas, which widely exists in many industrial processes, such as natural gas processing, biogas purification, petroleum refining, chemical process, coking oven, coal tar gasification and various industrial tail gases [Ghosh TK , et al. Chem. Eng. 1986; 64: 960?968]. It not only corrodes pipeline equipment, poisons catalysts, but also pollutes the environment, causing great harm to human body and ecology. Therefore, the effective removal of hydrogen sulfide has very important practical significance for both energy and chemical industry and environmental governance. h 2 S remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J35/10B01J21/18B01J27/232B01J23/04C01B17/04B01D53/52B01D53/86
CPCY02P20/584
Inventor 王旭珍詹冬武刘洋邱介山
Owner DALIAN UNIV OF TECH
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