Modified ZnO to Indonesia Limestone as heterogeneous catalysts for biodiesel production from Reutealis trisperma Oil


  • Raudhatus Shalihah Institut Teknologi Sepuluh Nopember
  • Nuni Widiarti Institut Teknologi Sepuluh Nopember
  • Suprapto Suprapto Institut Teknologi Sepuluh Nopember
  • Emsal Yanuar Universitas Teknologi Sumbawa
  • Didik Prasetyoko Institut Teknologi Sepuluh Nopember



limestone, ZnO/CL, Reutealis trisperma oil, biodiesel


The Bukit Jaddih Madura limestone has been modified as a heterogeneous catalyst in the transesterification reaction for biodiesel production. Limestone has been calcined at 900 ° C for 3 hours (CL) and it has been modified with ZnO using a wet impregnation method (ZnO/CL) to improve its catalytic activity. Catalysts were characterized by infrared spectroscopy (FTIR), X-ray diffraction (XRD), SEM-EDX and basicity test. FTIR analysis showed that BKK and ZnO/CL were easily hydrated and carbonated. XRD analysis showed that CL and ZnO/CL catalysts contained CaO, MgO and a little Ca(OH)2. SEM analysis showed that CL and ZnO/CL had different morphologies and sizes. Basicity test showed base strength of CL was 15,0 <H_ <18,4 and ZnO/CL was 8,2 <H_ <15,0. The catalyst activity on the transesterification reaction of Reutealis trisperma oil with methanol showed that biodiesel yield increased with increasing ZnO concentration.

Author Biographies

Raudhatus Shalihah, Institut Teknologi Sepuluh Nopember

Department of Chemistry, Faculty of Science

Nuni Widiarti, Institut Teknologi Sepuluh Nopember

Department of Chemistry, Faculty of Science

Suprapto Suprapto, Institut Teknologi Sepuluh Nopember

Department of Chemistry, Faculty of Science

Emsal Yanuar, Universitas Teknologi Sumbawa

Department of Metallurgy and Materials, Faculty of Mining Technology

Didik Prasetyoko, Institut Teknologi Sepuluh Nopember

Department of Chemistry, Faculty of Science


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