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-cept for citric acid(C6H8O7).Different acid treatments will increase the number of carboxyl groups on the AC sur-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.
关键词
机载灭火剂/活性碳/酸处理/微孔负载量/氟化钾/三氟碘甲烷
Key words
airborne fire extinguishing agent/activated carbon/acid treatment/microporous loading/potassium fluoride/trifluoroiodomethane(CF3I)
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