PENGARUH KONSENTRASI GLISERIN TERHADAP PEMBENTUKAN KALSIUM GLISEROKSIDA DAN PENGGUNAANNYA SEBAGAI KATALIS PADA PROSES TRANSESTERIFIKASI UNTUK MENGHASILKAN BIODIESEL…

ABSTRACT THE EFFECT OF GLYCERIN CONCENTRATION ON THE FORMATION OF CALCIUM GLYCERIDE OXIDE AND ITS USE AS A CATALYST IN THE TRANSESTERIFICATION PROCESS TO PRODUCE BIODIESEL FROM CASTOR OIL The use of biodiesel as a substitute for fuel is one of environmentally friendly alternative materials, but in the process of making biodiesel…