The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production

Lignite coal fly ash (FA) from a domestic thermal power plant was converted into pure cancrinite zeolitic material (ZMFA) using novel, custom-made, rotating autoclave reactor system by short-term alkali activation process. The obtained ZMFA used as catalyst support of calcium oxide an active component derived waste chicken eggshells (ES). supported (xCaO/ZMFA) synthesized means the ultrasound-assisted method. influence different concentrations dispersed (x = 5–20 wt%) over and treatment at temperatures (450–600 °C) were studied. structural morphological characterization showed that original structure preserved. basicity textural properties indicated presence strong sites in well-defined pore network suitable for reactions bulky organic compounds such triacylglycerols (TAGs). highest activity (96.5% fatty acid methyl esters) methanolysis sunflower oil achieved with 20CaO/ZMFA under reaction conditions: temperature 60 °C, methanol/oil molar ratio 12:1, concentration 4 wt%, time 2 h. It found optimal calcination precursor 550 °C. At above melting glassy phase became more intense whereby molten partially reacted forming catalytically inactive silicate (wollastonite, larnite, etc.). rate constants two tested kinetic models correlated oxide. MRPD both low indicating their reliability.