Cyclohexane Oxidation Of Activated Carbon
The editor introduces the solvent-free oxidation of activated carbon of cyclohexane. The raw material of activated carbon is made by phosphoric acid immersed in an environment of 380 ℃ and added with inert gas, and then activated by hydrogen peroxide. Activated carbon is characterized by SEM, EDX, FTIR, TGA and BET surface area and pore size analyzers. The potential reactor of activated carbon as a catalyst for the acyclic oxidation of cyclohexane to cyclohexanol and cyclohexanone (this mixture is called KA oil) in the presence of medium temperature molecular oxygen was studied in a homemade double-wall three-necked batch. The effects of different reaction parameters / additives were optimized.coconut shell activated carbon wholesale
Activated carbon was first reported as an effective catalyst in the early 19th century. In the early 19th century, activated carbon was usually prepared by thermal activation of different agricultural raw materials and was studied as a catalyst for hydrogen peroxide degradation. The catalytic activity of activated carbon for the decomposition of hydrogen peroxide is very good, but the duration is short. The most likely cause of the disappearance of the catalytic activity for decomposing hydrogen peroxide may be the deactivation of oxidizing groups on the surface of activated carbon. In recent decades, researchers have successfully solved the main problems of the durability of activated carbon. Through physical, physical, chemical and chemical activation, activated carbon is adjusted to show good catalytic activity in the production of phosgene, hydrogen sulfide, hydrogenation, polymerization, halogenation, removal of SO 2 and oxidation of NO x and benzyl alcohol. This property of activated carbon is attributed to its porosity, active sites and high surface area. Therefore, by controlling these parameters, activated carbon can be adjusted as an effective catalyst for the selected organic conversion.
Microscan image of activated carbon
Activated carbon experimental conditions and process
In the current work, under mild reaction conditions, in the presence of oxygen, activated carbon is used as a metal-free catalyst for the oxidation of cyclohexane without epoxidation to KA oil. The reaction parameters were optimized and the catalytic efficiency was found in terms of productivity. The convenience of preparation, sufficient activity, low cost, recyclability, impermeability and environmental protection make activated carbon a useful catalyst for the solvent-free oxidation of cyclohexane.
The surface morphology of activated carbon was studied by scanning electron microscope. The elemental composition of activated carbon was recorded by using energy dispersive X-ray spectroscopy. X-ray analysis was performed by X-ray diffractometer. The functional groups on the surface of activated carbon were examined by Fourier transform infrared spectrometer. The weight loss percentage of heat was carried out by a TGA thermal analyzer in a temperature range of 0/1000 ° C at a rate of 10 ° C / min under N 2 flow. The surface area of activated carbon was measured using a chromium surface area analyzer. Ningxia activated carbon manufacturer
Elemental content of activated carbonwww.granular-activated-carbon.com
Load cyclohexane (12.5 mL) and activated carbon (0.4 g) into a self-built double-wall three-port batch reactor. The mixture was stirred at 75 ° C for 14 hours in the presence of molecular oxygen (40 mL / min). In the same set of reaction parameters, the reaction was also carried out in the presence of basic NaOH: 0.2 mmole. The conversion of cyclohexane to KA oil was analyzed by gas chromatography, using a cross-linked methylsiloxane capillary column (30 μm, inner diameter 0.32 mm, mm film thickness), connected to a flame ionization detector (FID).
The surface morphology of activated carbon was analyzed by SEM. The SEM image shows a porous structure, a mixture of micropores / mesopores and cross-linked channels connected to the inner surface of activated carbon, as shown in Figure 1. The high magnification shows the presence of a cavity of 2 to 10 μm, allowing easy access to internal micropores and mesopores. In addition, EDX analysis (Figure 2) shows trace amounts of phosphorus and silica, which are the main content of peanut hulls.