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Donny Lesmana
Department of Chemical Engineering, Faculty of Engineering, Universitas Lampung, 1 Soemantri Brojonegoro, Rajabasa, Bandar Lampung, 35145
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Other

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Journal : JURNAL REKAYASA KIMIA

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Applied of Synthesis Furfural Based on Cassava Stems (Manihot utilissima) As Fuel Additive to Gasoline Lismeri, Lia; Riyadi, Lutfia Rahma; Darni, Yuli; Nugrahini, Panca; Azhar, Azhar; Lesmana, Donny
Jurnal Rekayasa Kimia & Lingkungan Vol 17, No 2 (2022): Jurnal Rekayasa Kimia & Lingkungan (December, 2022)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v17i2.26495

Abstract

Biofuel is an option to reduce CO2 generated by vehicles. In this study, synthetic crude furfural from cassava stems was blended as fuel additive to gasoline (Pertalite) and then induced by electromagnetic field. Analysis were carried out on engine performance and exhaust emissions produced by Kohler engines. Variations formed by samples crude furfural and commercial furfural (C5H4O2), then time variations of electromagnetic induction for 0 and 30 minutes. The blending composition of gasoline and furfural in a mixture of 1,500 ml fuel is 96% : 4%. The best results from increasing torque, cranking power and saving fuel consumption were obtained from variations in the use of crude furfural additives induced by electromagnetic fields (CFE). Exhaust emissions produced by pure Pertalite are still lower than fuels with furfural additives. The content of water and impurities in crude furfural causes the additive unmixed with Pertalite which is non-polar and hydrophobic.
The Leaching of Natural Dyes from Avocado (Persea Americana Mill) Seeds Using the Ultrasonic-Assisted Extraction Method and Its Application to Cellulose Fibers Utami, Herti; Agustin, Veni Tri; Novirianti, Luthfiah; Darni, Yuli; Lesmana, Donny; Takagi, Ryosuke
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 2 (2021): Jurnal Rekayasa Kimia & Lingkungan (December, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v16i2.20140

Abstract

The textile industry uses synthetic dyes because they are cheaper and easier to obtain. Moreover, the color availability is guaranteed and more varied. However, these synthetic dyes have a negative impact on health and the environment. The natural dye from avocado (Persea Americana Mill) seeds can become an alternative for synthetic dyes. Polyphenol compounds, such as tannins and flavonoids, are natural color sources found in avocado seeds. The extraction of natural dyes from avocado seeds is carried out by using a non-conventional method, namely ultrasonic-assisted extraction which has great efficiency and short operating time. In this study, researchers examined the parameters that affect the yield of dye extraction from avocado seeds, namely solvent concentration and extraction time. In addition, researchers also conducted qualitative analysis on the pigment content in the yield of extraction using UV-Visible Spectrophotometry and GC-MS tests. The results indicated that the highest yield obtained from avocado seeds was 16.6742% with 90 minutes extraction time using 70% ethanol solvent. Furthermore, if the dye is applied to cellulose fibers, such as the cotton cloth, the color will change depending on the fixator added. Based on the result of the UV-Visible Spectrophotometry test, the avocado seeds contain flavonoids. Meanwhile, from the result of the GC-MS test, the compound with the largest percentage detected in avocado seeds is the 13-Tetradecynoic acid, methyl ester (C15H26O2). The compound contains a chromophore, such as a carbonyl group (C = O) which is a common feature of flavonoids.
Co-Authors Agustin, Veni Tri Azhar Azhar Dewi, Jilda Sofiana Elida Purba Feerzet Achmad Herti Utami Ibrahim, Nurul Fatiha Irfan, Muhammad Muslim Lismeri, Lia M. Haviz Novirianti, Luthfiah Nugrahini, Panca Pandiangan, Kamisah Delilawati Pinania, Kherani Hana Prakosa, Agus Putri, Yolanda Dwika Rianto, Yoga Rifqi Fadhilah Irsa Riyadi, Lutfia Rahma Simparmin br Ginting Slamet Sumardi, Slamet Solly Aryza Sujoto, Vincent Sutresno Hadi Supriyadi, Harry Taharuddin Taharuddin Takagi, Ryosuke Widi Astuti Yuli Darni