Highly efficient catalytic oxidative denitrogenation of fuel using CuCl-modified CNT/UiO-66

Catalytic oxidative denitrogenation was carried out using a UiO-66 metal-organic framework modified with CNT and CuCl. The synthesized catalysts were characterized through various techniques, including XRD, FT-IR, BET, FE-SEM, EDX, and TEM which affirmed the successful synthesis of CuCl-X/CNT/UiO-66. The catalytic performances demonstrated that CuCl-X/CNT/UiO-66 exhibited excellent performance in oxidative denitrogenation of a model fuel. This high efficiency can be attributed to its large specific surface area of 831.3 m(2)/g, substantial pore volume of 0.4920 cm(3)/g, high apparent reaction rate constant of 0.081 min(-1) , and low activation energy of 21.43 kJ/mol. The synergy between CNT, Cu+, and Zr4+ in synthesized catalyst with H2O2 as green oxidant facilitated the generation of strong oxidizing radicals, center dot O-2(-) and center dot OH. Under optimal conditions, complete conversion of indole, 97.6 % conversion of quinoline, and 82.5 % conversion of carbazole were achieved at catalyst dosage= 2 g/L, V-MeOH/V-Fuel= 0.5, C-0= 500 ppm, T = 60 degrees C, O/N = 4 for 120 min. Additionally, CuCl-3/CNT/ UiO-66 could be regenerated for at least five cycles, maintaining over 90 % efficiency in the oxidative conversion of indole. The CuCl-3/CNT/UiO-66 catalyst showed a promising solution for the purification of fuels and the efficient removal of nitrogen-containing compounds, indicating its potential for practical applications in fuel treatment processes.