The Effect of Mole Ratio Natural-CaCO₃/KF in the Synthesis of KCaF₃ Perovskite Base Catalyst

I. F. Nurcahyo (Department of Chemistry, Faculty of Mathematics and Natural, Universitas Sebelas Maret, Surakarta 57126|Universitas Sebelas Maret|Indonesia)
Eddy Heraldy (Department of Chemistry, Faculty of Mathematics and Natural, Universitas Sebelas Maret, Surakarta 57126|Universitas Sebelas Maret|Indonesia)
Suciana Nur Cahyaningsih (Department of Chemistry, Faculty of Mathematics and Natural, Universitas Sebelas Maret, Surakarta 57126|Universitas Sebelas Maret|Indonesia)
Fitria Rahmawati (Department of Chemistry, Faculty of Mathematics and Natural, Universitas Sebelas Maret, Surakarta 57126|Universitas Sebelas Maret|Indonesia)
Khoirina Dwi Nugrahaningtyas (Department of Chemistry, Faculty of Mathematics and Natural, Universitas Sebelas Maret, Surakarta 57126|Universitas Sebelas Maret|Indonesia)
Yuniawan Hidayat (Department of Chemistry, Faculty of Mathematics and Natural, Universitas Sebelas Maret, Surakarta 57126|Universitas Sebelas Maret|Indonesia)
Firanda Larasati (Department of Chemistry, Faculty of Mathematics and Natural, Universitas Sebelas Maret, Surakarta 57126|Universitas Sebelas Maret|Indonesia)

JURNAL KIMIA SAINS DAN APLIKASI
Vol 27, No 8 (2024): Volume 27 Issue 8 Year 2024

The KCaF3 perovskite catalyst was successfully synthesized by reacting limestone (natural-CaCO3) with potassium fluoride (KF). The synthesis of the KCaF3 catalyst was conducted with several variations in the mole ratio of CaCO3 to KF (1:1, 1:2, and 1:3). The research results showed that the addition of KF can affect the characteristics of the catalyst. The optimal catalyst is the KCaF3 catalyst with a mole ratio variation of 1:3. X-ray diffractometer analysis revealed that the highest KCaF3 phase composition reached 74.05%, while thermogravimetric analysis indicated a CaCO3 concentration of 34.50%. Surface Area Analyzer analysis shows that KCaF3 has the largest surface area, which is 187.1 m2/g. This catalyst efficiently facilitated the transesterification of palm oil, yielding 93.4% biodiesel.