Modifikasi Katalis CaO dari Cangkang Kerang Darah dengan Silika Gel dari Sabu…

The global energy sector is still dominated by the use of non-renewable fossil fuels, encouraging various countries to switch to renewable energy sources such as biodiesel. Crude palm oil (CPO) as a biodiesel raw material contains high levels of Free Fatty Acids (FFA), which can reduce the quality of biodiesel if only using CaO catalysts. Therefore, an acid catalyst such as silica gel is needed…