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All Journal Jurnal Teknik Kimia USU Agrointek
Vikram Alexander
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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PENGARUH KONSENTRASI KATALIS ASAM SULFAT DAN WAKTU REAKSI PADA PEMBUATAN BIODIESEL DARI ASAM LEMAK KELAPA SAWIT Rondang Tambun; Anggara Dwita Burmana; Vikram Alexander
AGROINTEK Vol 15, No 1 (2021)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v15i1.8025

Abstract

This study aims to determine the amount of catalyst and the best reaction time in making biodiesel (methyl ester) from palm fatty acids. The esterification reaction is carried out at 65 oC by using sulphuric acid (H2SO4) as a catalyst. The catalysts used varies from 5 %, 10 %, 15 %, and 20 % to the amount of fatty acid, while the acid value is measured at the reaction time of 60 minutes, 75 minutes, 90 minutes, 105 minutes, and 120 minutes. The molar ratio of methanol and fatty acid varies from 5:1, 6:1, and 7:1. The results obtained show that the acid value increases rapidly from the reaction time of 60 minutes to the reaction time of 105 minutes, and does not increase significantly from the reaction time of 105 minutes to the reaction time of 120 minutes. Based on the acid value obtained, the highest conversion of fatty acids to biodiesel is 97.1250%. This result is obtained at a reaction time of 120 minutes, the amount of catalyst 20 % of the amount of fatty acid, and the molar ratio of methanol and fatty acids 7:1, but this result is almost the same as the conversion of fatty acids at the reaction time of 105 minutes with the same amount of catalyst and molar ratio, that is 96.9286%.
Pengaruh Kondisi Operasi terhadap Karakteristik Pengeringan Jahe Merah (Zingiber officinale Var. Rubrum) Menggunakan Tray Dryer dengan Udara Panas dari Proses Pirolisis Hasibuan, Rosdanelli; Hamdanah Hasibuan; Yovani Nissi Madani; Viqry Pramananda; Risma Fazillah; Vikram Alexander
Jurnal Teknik Kimia USU Vol. 12 No. 2 (2023): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v12i2.11496

Abstract

Red ginger (Zingiber officinale Var. Rubrum) is a rhizome plant often used as a complementary spice, a mixed ingredient in the food and beverages, and herbal medicines. One of the post-harvest processing of red ginger is drying, which aims to reduce the water content of red ginger to a point where the growth of microorganisms and the activity of enzymes that can damage red ginger can be prevented. This study aims to evaluate the effect of tray height and drying air temperature on moisture content, drying rate, drying characteristics, and quality of red ginger dried using a tray dryer with hot air from a biomass pyrolysis process. The results showed that both tray height and drying temperature affected red ginger's water content and drying rate. The quality of red ginger that complies with SNI 1-3393-1994 was obtained at a tray height of 60 cm and a drying temperature of 70 °C, with distinctive aroma and taste characteristics, the water content of 8,9%; ash content of 5,5%; oil content of 4,93 mL/100 g; and no fungus on the red ginger.
Co-Authors Anggara Dwita Burmana Hamdanah Hasibuan Risma Fazillah Rosdanelli Hasibuan Tambun, Rondang Viqry Pramananda Yovani Nissi Madani