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Siswoyo, Deddy Kurniawan Putra
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Industrial & Manufacturing Engineering Mechanical Engineering

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Synthesis of Nano Zinc Oxide Heterogeneous Catalyst Supported with Fly Ash (NZO/FA) for Kapok Seed Oil (Ceiba pentandra) Transesterification Asri, Nyoman Puspa; Siswoyo, Deddy Kurniawan Putra; Somadiharja, Yohannes
Jurnal IPTEK Vol 27, No 2 (2023): December
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i2.5273

Abstract

A biodiesel product was developed using the transesterification of kapok seed oil using a nano zinc oxide heterogeneous catalyst with fly ash buffer (NZO/FA) to support the goal of adopting biofuel as a national transportation energy source in 2050. Because it is affordable, environmentally benign, and has a high porosity level, fly ash was selected as a catalyst buffer. Kapok seed oil, on the other hand, is employed as a raw material because of its high oil content—between 25 and 40 percent—and because it offers the best means of resolving the problem of the trade-off between food and fuel in the energy and pagan sectors. In this study, the NZO/FA 50-Sto catalyst's characterisation in the creation of heterogeneous catalysts and the impact of varying transesterification times on biodiesel yield are the main research topics. The NZO/FA-TO-4.5H sample code produced at a calcination temperature of 500°C for 5 hours with a yield percentage of 95.93%, transesterification time of 4.5 hours, oil to methanol molar ratio of 1:15, and transesterification reaction temperature of 80°C was found to have the highest yield in this study. Meanwhile, SNI 7182: 2015's standards are almost entirely met by the biodiesel produced in general terms.
Utilization of Low-Grade Ceiba Pentandra Oil for Biodiesel Production Using Nano Zinc Oxide Catalyst Supported by Fly-Ash Waste Somawiharja, Yohannes -; Siswoyo, Deddy Kurniawan Putra; Asri, Nyoman Puspa
Jurnal IPTEK Vol 28, No 1 (2024): May
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5937

Abstract

Biodiesel is a renewable energy and potentially to be developed to replace fuel derived from fossil oil. This study explores the oil of Ceiba pentandra (OCP), a low-quality oil with high free fatty acids as a feedstock for biodiesel production.  A cost-effective nano-doped zinc oxide heterogeneous catalyst was developed using fly ash waste as a support called NZO/FA. The catalyst was synthesized using co-precipitation, precipitation, and impregnation methods. Biodiesel is made through a transesterification process using a laboratory-scale glass-type batch reactor. The experiment examines how the varied temperature (60-80°C with an interval of 10°C) and varied reaction time (3-5 hours with an interval of 0.5 h) influence biodiesel yield, heating value, and final product properties. Meanwhile, other conditions were fixed at a molar ratio of oil/methanol of 1:15 and a catalyst dosage of 5%. The results showed the highest yield of 98.69%, and a GHV of 37.95 MJ/kg was obtained at a reaction temperature of 80°C and a reaction time of 5 hours. Meanwhile, almost all of the characteristics of the biodiesel produced meet SNI 7182:2015.
Utilization of pineapple stems as biocatalysts in the production of coconut oil using the enzymatic method Fanani, Nurull; Nisa, Nur Ihda Farikhatin; Siswoyo, Deddy Kurniawan Putra; Tuhuloula, Abubakar; Putri, Novy Pralisa
Konversi Vol 14, No 1 (2025): APRIL 2025
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v14i1.22233

Abstract

The utilization of pineapple fruit stems as a by-product of the agricultural process has not been optimally utilized. Meanwhile, pineapple fruit stems have promising economic potential in the field of biotechnology and food processing. This is because pineapple fruit stems contain bromelain enzyme which is quite high compared to ripe fruit flesh, which is around 0.1-0.6%. This bromelain enzyme functions as a biocatalyst in breaking down protein and fat through the hydrolysis reaction of coconut oil. So to find out the catalytic activity of bromelain enzyme in pineapple fruit stems, the process of making coconut oil is carried out enzymatic method through variable addition of doses of 20, 30, 40, and 50% of the weight of coconut milk and enzymatic time duration of 6, 12, 18, and 24 hours. Based on the research results, the best variable is the addition of 30% biocatalyst dose and 24 hours of enzymatic process with the highest yield percentage of 67.9% and product characteristics that have met SNI 7381: 2008. This shows that pineapple fruit stems have the potential as a good biocatalyst in making coconut oil as well as providing added value to pineapple fruit stems in an effort to verify agricultural waste.
Co-Authors Abubakar Tuhuloula Novy Pralisa Putri, Novy Pralisa Nur Ihda Farikhatin Nisa Nurull Fanani Nyoman Puspa Asri Somadiharja, Yohannes Somawiharja, Yohannes -