Preparation of CaO/Fly ash as a catalyst inhibitor for transesterification process off palm oil in biodiesel production

3rd International Conference on Chemical Engineering Sciences and Applications 2017

Helwani, Z.^1 ; Fatra, W.^2 ; Saputra, E.^1 ; Maulana, R.^1

Departement of Chemical Engineering, Riau University, Pekanbaru

28293, Indonesia^1

Departement of Mechanical Engineering, Riau University, Pekanbaru

28293, Indonesia^2

关键词: Biodiesel production;    Brunauer emmett tellers;    Calcination temperature;    Calcium nitrate tetra-hydrate;    Catalyst preparation;    Impregnation methods;    Transesterification process;    Weight ratios;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/334/1/012077/pdf
DOI  :  10.1088/1757-899X/334/1/012077

来源: IOP

【 摘 要 】

A palm fly ash supported calcium oxide (CaO) catalyst was prepared and used in transesterification from off-grade palm oil for biodiesel production. The catalyst synthesized by loading CaO of calcium nitrate tetrahydrate (Ca(NO3)2.4H2O) into fly ash through impregnation method. The optimum catalyst preparation conditions were determined by influence of calcination temperature and weight ratio of Ca(NO3)2.4H2O and fly ash. Catalyst with highest catalytic activity was achieved when calcined at 800 °C and proportion of Ca(NO3)2.4H2O to fly ash is 80:20. Under the conditions of oil : methanol ratio of 1:6, catalyst dosage of 6 wt% and temperature of 70 °C for 2 h, the biodiesel yield reaches to 71.77%. CaO, SiO2, Ca(OH)2and Ca2SiO4were found in the catalyst through X-ray diffraction (XRD) while the basic strength of the catalyst H- in the range 9.3 - 11. Surface area of the developed catalyst is 24.342 m2/g through Brunauer-Emmett-Teller (BET). Characteristics of biodiesel such as density, kinematic viscosity, acid value, flash point has been matched with standard for biodiesel specification of Indonesia.