Sodium Silicates Modified Calcium Oxide as a High-Performance Solid Base Catalyst for Biodiesel Production

Under the energy crisis and with greenhouse gases causing an ecological imbalance, biofuel has attracted worldwide attention due to its sustainability low net-carbon emission. For years, traditional biodiesel industry been demanding a high-performance solid base catalyst. Its poor reusability is bottleneck for promising calcium-based solid-base In this work, we successfully adopted new silicate-strength strategy improve stability while preserving activity of The newly synthesized catalyst, NCSO, had two main catalytic phases, Na2CaSiO4 CaO, showed 98.2% FAMEs yield in 60 min at 80 °C methanol/oil molar ratio 9:1 5 wt.% catalyst loading. After 12 consecutive reuses, 57.3% could still be achieved. effect reaction temperature, methanol ratio, loading, time on was also investigated. With combined characterization XRD, XPS, SEM, etc., confirmed that CaO synergistic catalyzing transesterification reaction: addition phase NCSO significantly phase, turn, helps stabilize phase. This provides route synthesize stable highly active catalysts.