Effects of acid treatment on the catalytic synthesis of clean and efficient fire extinguishing agent CF3I by KF/AC#br#

Journal of Civil Aviation University of China ›› 2024, Vol. 42 ›› Issue (1): 24-29.

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Effects of acid treatment on the catalytic synthesis of clean and efficient fire extinguishing agent CF3I by KF/AC#br#

ZHOU Xiaomeng1 , REN Liheng1 , PENG Zhimin2,3 , WANG Gang2,3 , CHEN Wensheng2,3 , LIU Jian1 , YAN Hao1

(1. Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, CAUC, Tianjin 300300, China;
2. Hunan Nonferrous Chenzhou Fluorine Chemical Co., Ltd., Chenzhou 423042, Hunan, China;
3. Technology Research Center of Hunan Province for Comprehensive Utilization of Associated Fluorite and
Fluorine Chemical Engineering, Chenzhou 423042, Hunan, China)

Received:2022-08-30 Revised:2022-11-23 Online:2024-12-19 Published:2024-12-19

Abstract

Abstract: In order to explore the effects of different acid treatments on catalytic performance during catalyst preparation, and
reduce the production cost of trifluoroiodomethane (CF3I) to promote its application as a fire extinguishing agent in
the field of civil aviation, inorganic acids (HNO3, HCl, H2SO4) and organic acids (CH3COOH, CF3COOH, C6H8O7)
were used to pretreat activated carbon (AC), and a series of KF/AC catalysts were prepared using the treated AC as
a carrier. The catalytic synthesis performance under the same operating conditions was measured by CF3I yield.
The results showed that both inorganic acid and organic acid treatment will increase the AC micropore volume, ex鄄
cept for citric acid (C6H8O7). Different acid treatments will increase the number of carboxyl groups on the AC sur鄄
face and alkaline sites of catalyst. The microporous loading of K played a key role in the performance of catalysts.
Organic acid treatment can increase the microporous loading to three times more than that of untreated catalysts,
and the effect was significantly better than that of inorganic acid treatment. The treatment with trifluoroacetic acid
(CF3COOH) showed the most significant improvement of the catalytic performance.

Key words: font-size:15.04px, ">airborne fire extinguishing agent, activated carbon, acid treatment, microporous loading, potassium fluoride, trifluoroiodomethane (CF3I)

CLC Number:

V259

ZHOU Xiaomeng , REN Liheng , PENG Zhimin, , WANG Gang, , CHEN Wensheng, , LIU Jian , YAN Hao. Effects of acid treatment on the catalytic synthesis of clean and efficient fire extinguishing agent CF3I by KF/AC#br#[J]. Journal of Civil Aviation University of China, 2024, 42(1): 24-29.

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Effects of acid treatment on the catalytic synthesis of clean and efficient fire extinguishing agent CF3I by KF/AC#br#

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