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Harunsyah Harunsyah
Politeknik Negeri Lhokseumawe
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Pembuatan Bioplastik dengan Penguat ZnO dan Penambahan Minyak Atsiri sebagai Anti Mikroba Fitri Takribiah; Harunsyah Harunsyah; Zuhra Amalia; Reza Fauzan; Muhammad Sami
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2881

Abstract

Environmental problems caused by petroleum-derived plastic waste has become an important issue because it is difficult to degrade the environment. Therefore, attempts have been made to speed up the process of degradation of the polymer material is to replace synthetic polymers with natural poimer. Starch is a natural polymer that can be used for the production of material that is easily degraded, the raw material is abundant, but has a weakness in its mechanical properties. To improve the mechanical strength of starch, a reinforcing material in the form of inorganic material is usually added in a polymer matrix. In addition to improving shelf life in a plastic made from natural polymers required additional antimicrobial. Therefore, bioplastics prepared by mixing cassava starch as a matrix, glycerol as a plasticizer, ZnO as an amplifier, and clove oil as an antimicrobial. The optimum conditions to produce bioplastics with the highest tensile strength of 23.40 kgf /mm2 given by the addition of 0.8% of ZnO and 0.4 ml clove oil. While the highest percent elongation on the addition of ZnO 1% and 0.4 ml clove oil which is 346.00%. Based on the test results of water resistance and biodegradability, clove oil shown to inhibit the growth of microorganisms bioplastics and bioplastic IR spectra do not show any new functional group.
Analisis Volume LNG Ideal untuk Cooling Down Fasilitas LNG Hub Dhian Nugraha; Harunsyah Harunsyah; Munawar Munawar
Jurnal Teknologi Vol 23, No 1 (2023): April 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i1.3687

Abstract

The LNG Receiving Hub facility is an existing facility that has not been used for a long time. In order for this facility can be used again, all equipment and piping systems must first be conditioned to a temperature close to the operational temperature of LNG, which is -160 oC. The purpose of this approach is to determine the theoretical and actual volume of LNG used for the cooling down process of the LNG Hub facility, as well as to compare it with the cooling down process for the regasification facility. An analytical approach is used in this study to determine the ideal amount of LNG needed for cooling down the facility and compare it with the actual amount of LNG that is being used for cooling down the facility. From the results of the analysis, the theoretical LNG volume needed for cooling down the LNG Hub facility is 8,176 m3 and the actual volume is 7,013.6620 m3, while the actual value for cooling down the regasification facility is 11,573.19 m3. The actual volume for the LNG Hub facility is smaller compared to regasification which can be caused by the smaller volume of pipelines and the difference in the cooling down mechanism in both facilities.
Pembuatan Biodiesel dari Virgin Red Palm Oil (VRPO) melalui Proses Transesterifikasi dan Penambahan Zat Aditif Minyak Sereh Wangi untuk Meningkatkan Cetane Number Siti Iffat Tabriza; Harunsyah Harunsyah; Fachraniah Fachraniah
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8958

Abstract

This study aims to analyze the effect of reaction temperature and the addition of citronella oil as an additive on the characteristics of biodiesel produced from Virgin Red Palm Oil (VRPO) through a transesterification process. The reaction temperatures were varied at 50°C, 55°C, 60°C, and 65°C, while the volume of citronella oil ranged from 0 to 10 mL. The evaluated parameters included yield, viscosity, density, flash point, and cetane number. The results showed that increasing the temperature up to 60°C improved the biodiesel yield to 57%, while no significant increase was observed at 65°C due to methanol evaporation. The addition of citronella oil at 2–4 mL effectively increased the cetane number up to approximately 55.9 and improved the physical properties of biodiesel, particularly viscosity and flash point. However, excessive additive concentration (≥6 mL) led to a decline in biodiesel quality due to increased viscosity and reduced mixture homogeneity. GC-MS analysis indicated that the biodiesel was dominated by fatty acid methyl esters such as methyl oleate and methyl palmitate, which contribute to combustion performance and oxidative stability. The optimum condition was achieved at 60°C with the addition of 4 mL citronella oil, producing biodiesel with the best characteristics and potential to meet fuel quality standards.
Co-Authors Dhian Nugraha Fachraniah, Fachraniah Fitri Takribiah M Munawar Muhammad Sami Reza Fauzan Siti Iffat Tabriza Zuhra Amalia