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Application of Fe-based metal organic framework material as combustion catalyst

A technology of combustion catalysts and organic frameworks, applied in organic compound/hydride/coordination complex catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as catalytic efficiency limitations

Pending Publication Date: 2022-07-22
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although nano-iron oxide provides a reference for combustion catalysts to achieve high-efficiency catalysis, its catalytic efficiency is still limited by its concentration. How to maximize the catalytic activity is the key to improving the catalytic performance of combustion catalysts.

Method used

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  • Application of Fe-based metal organic framework material as combustion catalyst
  • Application of Fe-based metal organic framework material as combustion catalyst
  • Application of Fe-based metal organic framework material as combustion catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Mixed ligand MIL-101(Fe)-NH 2 - R % Material preparation

[0022] Synthetic series MIL-101(Fe)-NH 2 - R % ( R = 0, 9, 19, 28, 38, 48) mixed ligand materials, where R is the ratio of 2-aminoterephthalic acid ligands to total ligands (terephthalic acid and 2-aminoterephthalic acid). The specific experimental scheme is as follows: Weigh FeCl separately 3 ·6H 2 O (324 mg), terephthalic acid (H 2 BDC, 100, 90, 80, 70, 60 mg) and 2-aminoterephthalic acid (NH 2-BDC, 0, 10, 20, 30, 40, 50 mg) was dissolved in N,N dimethylformamide (DMF, 7.5 mL), after sonication for 15 minutes, the above mixed solution was transferred to the reactor, and then The reaction was heated at 125 °C for 12 h in an oven, cooled to room temperature, washed three times with DMF and ethanol, and the product obtained by centrifugation was dried at 70 °C overnight.

Embodiment 2

[0023] Example 2 Preparation of HP-MIL-101(Fe) material

[0024] Based on the mixed ligand MIL-101(Fe)-38% material synthesized in Example 1, the obtained tan powder MIL-101(Fe)-NH 2 -38% raw materials were put into a muffle furnace and heated at different temperatures (320, 300, 280, 260 and 200 °C) for 30 min to obtain HP-MIL-101(Fe)- X ( X = 320, 300, 280, 260 and 200 °C) etc. After cooling to room temperature, it was placed in a vacuum drying oven and activated at 100 °C for 6 hours. Finally, after cooling to room temperature, the obtained solid powder was transferred to a 6 ml centrifuge tube and stored in a sealed and dry condition.

Embodiment 3

[0025] Example 3 Mixed ligand MIL-101(Fe)-NH 2 - R %Material structure and morphology analysis

[0026] (1) MIL-101-NH 2 - R %Material Morphology Analysis

[0027] The microstructure of the material was first characterized by scanning electron microscopy (SEM). One-pot synthesis of different NH 2 -H 2 MIL-101(Fe)-NH in BDC ratio 2 - R % ( R = 0, 9, 19, 28, 38, 48) materials such as figure 1 shown. MIL-101(Fe)-NH 2 -0% exhibits a typical octahedral shape and is uniformly distributed. With NH 2 - Increased proportion of BDC ligands, MIL-101(Fe)-NH 2 - R % ( R = 9, 19, 28, 38, 48) were similar in morphology to MIL-88B, showing a spindle morphology with an average size of 1 μm in length and about 500 nm in diameter. However, when the doping ratio is too high, the mixed ligand MIL-101(Fe)-NH 2 -48% may have a strong competitive reaction, each forming a single-ligand MOF with uneven distribution.

[0028] To further confirm the successful introduction of NH to t...

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Abstract

The invention discloses application of a Fe-based metal organic framework material MIL-101 (Fe)-R% as a combustion catalyst, the Fe-based metal organic framework material is MIL-101 (Fe)-R% and is obtained by synthesizing FeCl3. 6H2O, terephthalic acid and 2-aminoterephthalic acid in an N, N '-dimethylformamide solvent, R is the molar ratio of 2-aminoterephthalic acid ligand to total ligand, and R is 0%-48%. According to the method, a part of thermosensitive ligand NH2-BDC is removed by accurately controlling the pyrolysis temperature, the HP-MIL-101 (Fe) material with controllable concentration of nano active iron oxide is obtained, and Fe2O3 is uniformly dispersed in pores of MOFs and can be used as a combustion catalyst for promoting thermal decomposition of propellant components.

Description

technical field [0001] The invention relates to the application of Fe-based metal organic framework materials as combustion catalysts in solid propellants, and belongs to the technical field of combustion catalysis. Background technique [0002] Solid propellant is widely used in rocket launch and aerospace, and is one of the most important propulsion energy sources. With the rapid development of aerospace technology and the increasingly fierce competition among countries, higher requirements have been placed on the performance of solid propellants. The development of composite solid propellants with high energy characteristics, high range and high survivability has become the mainstream research direction. Composite solid propellants are mainly composed of functional components such as fuel and oxidant. Ammonium perchlorate (AP) and hexogen (RDX) are the most widely used energetic components in composite solid propellants. To improve their combustion efficiency and perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J37/08C06B23/00C06D5/06
CPCB01J31/1691B01J37/08C06B23/007C06D5/06B01J2531/842
Inventor 李明静武文杰谢钢
Owner NORTHWEST UNIV(CN)
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