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Cobalt-based mesoporous material Co-TUD-1 catalyst and preparation method and application thereof

A TUD-1, cobalt-based mesoporous technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as slowness, product quality decline, and sulfite secondary pollution

Inactive Publication Date: 2019-09-06
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this technology involves slow magnesium sulfite oxidation, incompletely oxidized magnesium sulfite will cause problems such as blockage of the system, product quality degradation, and secondary pollution of sulfite. Therefore, in the wet magnesium desulfurization technology, find a suitable Catalytic oxidation of magnesium sulfite is a very economical and feasible method

Method used

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  • Cobalt-based mesoporous material Co-TUD-1 catalyst and preparation method and application thereof
  • Cobalt-based mesoporous material Co-TUD-1 catalyst and preparation method and application thereof
  • Cobalt-based mesoporous material Co-TUD-1 catalyst and preparation method and application thereof

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preparation example Construction

[0027] The present invention provides the preparation method of above-mentioned cobalt-based mesoporous material Co-TUD-1 catalyst, comprising the following steps:

[0028] (1) Mixing cobalt sulfate, ethyl orthosilicate, triethanolamine, tetraethylammonium hydroxide and water, standing and drying successively to obtain xerogel;

[0029] (2) performing hydrothermal treatment and calcination on the dry gel in sequence to obtain the cobalt-based mesoporous material Co-TUD-1 catalyst.

[0030] The invention mixes cobalt sulfate, ethyl orthosilicate, triethanolamine, tetraethylammonium hydroxide and water, stands still and dries in sequence to obtain dry gel. In the present invention, the mass ratio of ethyl orthosilicate, triethanolamine and tetraethylammonium hydroxide is preferably 8.82~10.78:6.633~8.107:3.182~3.889:2.8~11.8, more preferably 9.8:7.3744: 3.535:4.8; In the present invention, the purity of described cobalt sulfate is preferably > 99%, the purity of described ethyl...

Embodiment 1

[0038] Preparation of cobalt-based mesoporous material Co-TUD-1 catalyst with cobalt-silicon molar ratio of 8%:

[0039] Take 1.12gCoSO 4 ·7H 2 O (purity>99%) is dissolved in 3mL deionized water, is added dropwise in 10.729mL orthosilicate ethyl ester (purity>98%), uses magnetic stirrer to stir while adding dropwise, and 8.64g triethanolamine (purity is 85%) and 1.8g of deionized water were added dropwise to the above solution, and after stirring for 30min, 14.14g of tetraethylammonium hydroxide (purity was 25%) was added dropwise, and the mixed liquid was covered with plastic wrap and allowed to stand at room temperature for 24h, 100 Dry in a drying oven at ℃ for 24 hours to obtain the xerogel; put the xerogel in a polytetrafluoroethylene reactor at 180℃ for 8 hours, and finally calcinate it in a muffle furnace at 600℃ for 10 hours at a heating rate of 1℃ / min to obtain The cobalt-based mesoporous material Co-TUD-1 catalyst is denoted as 8% Co-TUD-1.

[0040]Gained 8% Co-TU...

Embodiment 2

[0042] The amount of cobalt sulfate was changed so that the molar ratio of cobalt to silicon was 10%, and the rest of the method was the same as in Example 1 to obtain a cobalt-based mesoporous material Co-TUD-1 catalyst, which was recorded as 10% Co-TUD-1.

[0043] Gained 10% Co-TUD-1 is carried out SEM scanning electron microscope test, and obtained result is as follows figure 2 shown by figure 2 It can be seen that 10% Co-TUD-1 also has a sponge-like porous structure, and its specific surface area is 400-1000m 2 / g, the pore diameter is 2.5-25nm. Among them, the silica skeleton is an amorphous structure, which is in an amorphous state and lacks a long-range ordered mesoporous structure.

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Abstract

The invention provides a cobalt-based mesoporous material Co-TUD-1 catalyst and a preparation method and application thereof, belonging to the technical field of composite materials. The cobalt-basedmesoporous material Co-TUD-1 catalyst comprises TUD-1 and cobalt cations loaded on the pore wall of the TUD-1. The cobalt-based mesoporous material Co-TUD-1 catalyst has a cobalt-silicon molar ratio of 8-80%. The cobalt-based mesoporous material Co-TUD-1 catalyst has high specific surface area, adjustable pore structure and high catalytic efficiency when used for catalyzing magnesium sulfite oxidation. The results show that the cobalt-based mesoporous material Co-TUD-1 catalyst has a sponge-like mesoporous structure, has a specific surface area of 400-1000m<2> / g and a pore diameter of 2.5-25 nm, and can reach a catalytic rate of 0.1015 mmol / L / s when being used for catalyzing the magnesium sulfite oxidation.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a cobalt-based mesoporous material Co-TUD-1 catalyst and its preparation method and application. Background technique [0002] SO in coal-fired flue gas of thermal power plant 2 The content of sulfur dioxide accounts for 0.11-0.35%, and the flue gas must be desulfurized before it can be discharged. The most common desulfurization technology is wet desulfurization in flue gas desulfurization. Although calcium desulfurization occupies a dominant position, wet magnesium desulfurization has gradually entered people's field of vision. The wet magnesium flue gas desulfurization process has the advantages of small footprint, no fouling and low energy consumption, so it is a flue gas desulfurization process with more advantages than other flue gas desulfurization technologies. Since this technology involves slow magnesium sulfite oxidation, incompletely oxidized magnesium s...

Claims

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Application Information

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IPC IPC(8): B01J29/76B01J35/10C01F5/40
CPCB01J29/76C01F5/40B01J35/617B01J35/615B01J35/647
Inventor 汪黎东张琳齐铁月邢磊刘洁
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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