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Preparation method of high-temperature phase-change thermal storage type composite catalyst carrier

A composite catalyst and high-temperature phase change technology, which is applied in the direction of catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve problems such as the application of bound metals, achieve high heat storage density, solve hot spot problems, and improve anti-sintering The effect of the ability

Active Publication Date: 2013-11-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shortcoming largely restricts the application of metals in practice.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] NiCl 2· 6H 2 O and gelatin were sampled at a mass ratio of 0.5:1, then dissolved in water at a solid-to-liquid ratio (g / mL) of 1.5:100, and then mixed with NiCl at a speed of 300 rpm 2· 6H 2 The mass ratio of O and aluminum powder is 0.5:1, adding aluminum powder with a particle size of 300 mesh until it is completely dispersed in the solution, then heating the solution to 40°C, and then dripping NH with a concentration of 0.2 mol / L at a rate of 5 mL per minute. 4 F solution, filtered after reacting for 15min, wherein NH 4 The amount of F solution is based on NiCl 2· 6H 2 O and NH 4 The solid-to-liquid ratio (g / mL) of the F solution is added in an amount of 0.5:50, the precipitate is washed with water three times, and after drying at a constant temperature at 100°C, the obtained powder is calcined at 1000°C for 20 minutes to obtain a high-temperature phase transition Regenerative composite catalyst carrier.

[0020] The prepared composite material is mixed with i...

Embodiment 2

[0022] FeCl 3· 6H 2 O and gelatin were sampled at a mass ratio of 1:2, then dissolved in water at a solid-to-liquid ratio (g / mL) of 3:150, and then mixed with FeCl at a speed of 400 rpm 3· 6H 2 The mass ratio of O and aluminum powder is 1:2, and the aluminum powder with a particle size of 300 mesh is added until it is completely dispersed in the solution, and then the solution is heated to 40°C, and NH with a concentration of 0.25 mol / L is added dropwise at a rate of 6 mL per minute. 4 F solution, filtered after reacting for 15min, wherein NH 4 The amount of F solution is based on FeCl 3· 6H 2 O and NH 4 The solid-to-liquid ratio (g / mL) of solution F is added in an amount of 1:50, the precipitate is washed with water three times, and after drying at a constant temperature at 100°C, the obtained powder is roasted at 1000°C for 30 minutes to obtain a high-temperature phase transition Regenerative composite catalyst carrier.

[0023] The obtained composite material with he...

Embodiment 3

[0025] CuSO 4· 5H 2 O and gelatin were sampled at a mass ratio of 0.8:1.5, then dissolved in water at a solid-to-liquid ratio (g / mL) of 2.3:120, and then mixed with CuSO at a speed of 500 rpm. 4· 5H 2 The mass ratio of O and aluminum powder is 0.8:1.5. Add aluminum powder with a particle size of 300 mesh until it is completely dispersed in the solution. Then, the solution is heated to 40°C and then dripped with 0.23 mol / L NH at a rate of 8 mL per minute. 4 F solution, filtered after reacting for 15min, wherein NH 4 The amount of F solution is based on CuSO 4· 5H 2 O and NH 4 The solid-to-liquid ratio (g / mL) of the F solution is added in an amount of 0.8:50, the precipitate is washed with water three times, and after drying at a constant temperature at 100°C, the obtained powder is calcined at 1000°C for 25 minutes to obtain a high-temperature phase transition Regenerative composite catalyst carrier.

[0026] The obtained composite material with heat storage function is ...

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Abstract

The invention provides a preparation method of a high-temperature phase-change thermal storage type composite catalyst carrier. A metallic compound and gelatin are sampled according to the mass ratio of 0.5-1 to 1-2, then are dissolved into water according to the solid-to-liquid ratio of 1.5-3 to 100-150, then aluminum powder is added according to the mass ratio that the metallic compound to aluminum powder is 0.5-1 to 1-2 under a stirring condition until being dispersed in the solution completely, a NH4F solution with the concentration of 0.2 to 0.25 mol / L is dripped at the speed of 5 to 8mL per minute after the temperature of the solution reaches 40 DEG C, filtering is performed after reaction for 15 min, water is used for washing sediment for three times, after constant-temperature drying at 100 DEG C, and obtained powder is roasted for 20 to 30 min at the temperature of 100 DEG C, namely the high-temperature phase-change thermal storage type composite catalyst carrier is obtained. According to the invention, the sintering-resisting capability of the catalyst is improved, and the stabilizing of the reactivity of the catalyst is also facilitated on the other hand. Two functions of catalyzing and thermal storing are combined, the obtained material can absorb and emit heat in a position near a phase change point, high-density heat storage is achieved, and the stability during the process of catalytic reaction is ensured.

Description

technical field [0001] The invention relates to a catalyst carrier with heat storage function, in particular to a preparation method of a high-temperature phase change heat storage composite catalyst carrier, which belongs to the technical field of applied catalysis. Background technique [0002] In many chemical reactions involving catalysts, severe sintering of catalysts due to exothermic reaction or local overheating (hot spots) caused by uneven heating is an important reason for catalyst deactivation. Although improving the physical properties of catalyst supports (such as specific surface area, pore structure, and bulk density, etc.) can alleviate this hazard to a certain extent, it cannot fundamentally solve the problem. Thermal storage technology is a common means to reconcile the mismatch between thermal energy supply and demand in time and space. In particular, phase change heat storage technology has been widely used in many fields such as solar energy storage and...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J35/02B01J23/755B01J23/745B01J23/72
Inventor 李孔斋吴冬冬王华魏永刚祝星宁培洪郑燕娥
Owner KUNMING UNIV OF SCI & TECH
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