Synthesis of geopolymer from rice husk ash for biodiesel production of Calophyllum inophyllum seed oil

[摘要] In this work, geopolymer was prepared from rice husk ash (RHA) made into sodium silicate then synthesized by reacting metakaolin, NaOH, and water. The catalyst was characterized using Scanning Electron Microscopy (SEM), Energy-dispersive X-Ray analysis (EDX), Brunaeur Emmet Teller (BET), and basic strength. Then, the catalyst used for transesterification of Calophyllum inophyllum seed oil in order to produce biodiesel. The variation of process variables conducted to assess the effect on the yield of biodiesel. The highest yield obtained 87.68% biodiesel with alkyl ester content 99.29%, density 866 kg/m3, viscosity 4.13 mm2/s, the acid number of 0.42 mg-KOH/g biodiesel and the flash point 140 °C. Generally, variations of %w/w catalyst provides a dominant influence on the yield response of biodiesel. The physicochemical properties of the produced biodiesel comply with ASTM standard specifications.

[发布机构] Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth; WA; 6845, Australia^1;Department of Chemical Engineering, Riau University, Pekanbaru; 28293, Indonesia^2;Department of Civil Engineering, Riau University, Pekanbaru; 28293, Indonesia^3

[关键词] Biodiesel production;Energy dispersive x-ray analysis (EDX);Physicochemical property;Process Variables;Rice husk ash;Sodium silicate;Standard specifications;Yield response