Anggoro, D. D. ., Buchori , L. ., Rinaldi, N. ., Silviana , S. ., Le Monde, B. U., Putra, M. F. ., & Zainol, M. M. . (2026). Hybrid Ultrasound and Advanced Oxidation Process Regeneration of Spent FCC Catalysts: Optimization and Their Catalytic Performance. Journal of Engineering and Technological Sciences, 58(2), 227–242. https://doi.org/10.5614/j.eng.technol.sci.2026.58.2.6