Activated carbon experiment results and discussion

On the surface of activated carbon, oxygen-containing functional groups are responsible for the oxidation of cyclohexane to cyclohexanol and cyclohexanone. It is widely reported that the surface of activated carbon and molecular oxygen pass through oxygen-containing functional groups such as carbonyl, ketone and quinone. In addition, the oxidation reaction of activated carbon occurs through oxygen-containing surface functional groups, carbon pellets manufacturer and these functional groups are regenerated by molecular oxygen. In recent studies, it was discussed that quinone groups are the most stable and main source of cyclohexane oxidation, among other oxygen-containing groups. The Fenton-like mechanism of the quinone / hydroquinone system is the most likely route for the oxidation propagation of cyclohexane. Quinolone is regenerated from hydroquinone in the reaction mixture by continuous oxygen bubbling. Surface functional groups (variety / density) can be chemically / heat treated. In recent studies, as shown in TGA, the oxygen functional groups generated on the surface of activated carbon are adjusted by heat treatment. Activated carbon is treated at a high temperature of 580 ℃ ;. Therefore, the only existing oxygen-containing functional group will be quinone. Confirm the stability of the quinone functional group at high temperature (700 ° C). Similarly, the stability of the quinolone functional group is as high as 800 ° C. Therefore, to summarize, the oxidation of cyclohexane to cyclohexanol and cyclohexanone follows the mechanism shown in the scheme.ningxia yongruida carbon Co., Ltd

Activated carbon is synthesized by chemical methods and is oxidized without solvent in cyclohexane with low molecular oxygen. Activated carbon is adjusted by heat treatment to develop quinone functional groups on the surface. The optimal reaction parameters are set as follows: reactant 115.56mmol, activated carbon 0.4g, temperature 75 ° C, time 14 hours. Compare the catalytic activity of the catalyst with the literature reported on the basis of the productivity of the current research importance. The catalyst was reused several times, which indicates the durability of the catalyst. The research results show that the quinone functional group is the best reaction core for the regeneration performance of cyclohexane oxidation with molecular oxygen. Activated carbon was found to be a true heterogeneous catalyst with extended life.