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Carbon-based titanium dioxide composite combustion catalyst for propellant and preparation method of carbon-based titanium dioxide composite combustion catalyst

A carbon-based titanium dioxide, combustion catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve high safety, mild chemical vapor synthesis conditions, and good dispersibility.

Active Publication Date: 2020-07-31
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention proposes a carbon-based titanium dioxide composite combustion catalyst for propellants and a preparation method thereof to solve the technical problem of how to prepare a carbon-based titanium dioxide composite combustion catalyst

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  • Carbon-based titanium dioxide composite combustion catalyst for propellant and preparation method of carbon-based titanium dioxide composite combustion catalyst
  • Carbon-based titanium dioxide composite combustion catalyst for propellant and preparation method of carbon-based titanium dioxide composite combustion catalyst
  • Carbon-based titanium dioxide composite combustion catalyst for propellant and preparation method of carbon-based titanium dioxide composite combustion catalyst

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Embodiment 1

[0044] This embodiment proposes a carbon-based titanium dioxide composite combustion catalyst for propellants and a preparation method thereof. The carbon-based material used is an activated carbon material with a specific surface area of ​​1250 square meters per gram. The preparation method specifically includes the following steps:

[0045] Step 1. Spread the activated carbon in the reaction chamber of the chemical vapor deposition equipment, and then close the sample inlet and outlet of the chemical reaction deposition equipment;

[0046] Step 2, respectively heating the chemical vapor deposition reaction chamber and the titanium tetraisopropoxide holding container by means of an electric heating wire so that the temperatures are respectively at 140°C and 40°C;

[0047] Step 3, argon gas with a flow rate of 50 sccm is passed into the reaction chamber from the inlet of the vapor deposition equipment, and a vacuum pump is used to pump air at the outlet of the vapor deposition ...

Embodiment 2

[0064] This embodiment proposes a carbon-based titanium dioxide composite combustion catalyst for propellants and a preparation method thereof, and the carbon-based material used is ordered mesoporous carbon (such as Figure 9 shown), the specific surface area is 600 square meters per gram, and the preparation method specifically includes the following steps:

[0065] Step 1, placing the ordered mesoporous carbon in the porous container and then placing it in the reaction chamber of the chemical vapor deposition equipment, and then closing the sample inlet and outlet of the chemical reaction deposition equipment;

[0066] Step 2, respectively heating the chemical vapor deposition reaction chamber and the titanium tetraisopropoxide holding container through electric heating wires, so that the temperatures thereof are respectively at 160°C and 60°C;

[0067] Step 3, argon gas with a flow rate of 60 sccm is passed into the reaction chamber from the inlet of the vapor deposition e...

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Abstract

The invention provides a carbon-based titanium dioxide composite combustion catalyst for a propellant and a preparation method of the carbon-based titanium dioxide composite combustion catalyst, and the preparation method mainly comprises the following steps: exposing a carbon-based substrate in titanium tetraisopropoxide steam, so that steam molecules are subjected to chemical and physical adsorption on the surface of the carbon-based substrate; blowing away the titanium tetraisopropoxide molecules physically adsorbed on the surface by using inert gas; exposing the carbon-based substrate to steam of hydrogen peroxide or water, so that steam molecules and adsorbed titanium tetraisopropoxide molecules are subjected to a group replacement reaction; and blowing the replaced groups on the surface of the carbon-based substrate and redundant steam molecules away from the surface of the carbon-based substrate by using inert gas. According to the prepared composite combustion catalyst, titanium dioxide is uniformly dispersed on the surface of a carbon base, the titanium dioxide loading capacity is accurate and adjustable, the structure is accurate and controllable, active sites are fully exposed, grain boundary catalysis and synergistic catalysis are fully utilized, and the combustion catalyst is good in performance and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of powder material surface modification and preparation thereof, and in particular relates to a carbon-based titanium dioxide composite combustion catalyst for propellant and a preparation method thereof. Background technique [0002] The combustion performance of the propellant has an important influence on the ballistic performance of the rocket engine. The burning rate determines the working time and flight speed of the rocket engine, and the impact of the burning rate on the external conditions (temperature and pressure) directly affects the stability of the engine's working performance. Therefore, it is very important to control and adjust the combustion performance of rocket propellants to meet the performance requirements of various artillery, rocket engines and rocket weapons. The use of combustion catalysts is the most common method to adjust and improve the combustion performance of propellants. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J37/08C06D5/00C06B23/00
CPCB01J21/18B01J37/08C06B23/007C06D5/00
Inventor 冯昊李建国李丹龚婷秦利军张王乐惠龙飞
Owner XIAN MODERN CHEM RES INST
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