Article Per Year (5 Year)
p-Index From 2021 - 2026
1.463
P-Index
This Author published in this journals
All Journal Jurnal Serambi Engineering Jurnal Vokasi Jurnal Teknologi Jurnal Polimesin Jurnal Riset, Inovasi, Teknologi & Terapan
Teuku Rihayat
Politeknik Negeri Lhokseumawe
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
Pembuatan Grafena dengan Metode Reduksi Graphene Oxide Menggunakan Bahan Baku Grafit dan Reduktor Natrium Hipopospit Ratna Sari; Cut Dina Mastura; Teuku Rihayat; Ratni Dewi; Lukman Hakim
Jurnal Serambi Engineering Vol 7, No 2 (2022): April 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i2.4211

Abstract

One of the new materials that has developed recently is graphene. Graphene is a new closed, strongest, and superior material in the world today which is formed from a single layer of carbon atoms which has a hexagonal structure resembling a honeycomb. This study aims to determine the effect of graphite size on the quality of graphene produced using the graphene oxide reduction method. This method uses sodium hypophosphite reductor and oxidizing agent KMnO4, sulfuric acid and hydrogen peroxide. The quality of graphene is observed by looking at the electrical conductivity produced. This study varied the size of the graphite (106 µm, 125 µm, 150 µm, 180 µm dan 250 µm) and the reductor volume variation (3 ml, 5 ml, 7 ml, 9 ml dan 11 ml). The graphene oxide solution was heated in hot water and then filtered, ultrasonically for 3 hours, and in the oven for 6 hours at 80oC. From the results of the electrical conductivity test, the best results were obtained at a graphite size of 106 µm while for the volume of the reductor the best results were at 11 ml. Graphene was characterized using FTIR (Fourier transform infrared) and SEM (scanning electron microscope). The results of the characterization of the powder samples show that there has been a change in the structure of graphite to graphene. The size of the graphite and the volume reducing agent has a significant effect on the graphene’s electrical conductivity.
Isolasi Senyawa Anti Bakteri Geraniol Dari Minyak Sereh Wangi (Citronella Oil) Dengan Menggunakan Distilasi Vakum Uswatun Hasanah; Zulkifli Zulkifli; Teuku Rihayat; Andi Wardana; Cut Nazia N
Jurnal Teknologi Vol 21, No 1 (2021): April 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (303.824 KB) | DOI: 10.30811/teknologi.v21i1.2208

Abstract

This study aims to increase geraniol levels in citronella oil, using vacuum distillation. Geraniol is a compound that has been legalized by IFRA (Fragrance International Association) as a scent compound, so geraniol is a reference to be formulated in the form of Anti-bacterial perfume products, but the levels of geraniol in citronella oil are still very low. This encourages the processing of fragrant citronella oil to be processed, by increasing geraniol levels using vacuum distillation, with variations in pressure: 8,6,4,2,1 mbar, during operating times: 20, 40, and 60 minutes up to FBP ( Final Boiling Point). Samples were analyzed using GC-MS (Gas Chromatography-Mass Spectrometry), FT-IR, refractive index, and bacterial testing. The results showed that the use of low pressure affected increasing geraniol levels. The maximum increase in geraniol content was 80.11% at a pressure of 1 mbar at the Final Boiling Point operation, with a refractive index of 1.501, whereas in the FTIR test there was an intense broad peak in the range 2200-3200 cm-1 especially at 3086.98cm-1 according to the OH hydroxyl polymer group at Geraniol. This study increased geraniol levels from 20.32% to 80.11%.
Modification of polyurethane coating based on palm oil with filler bentonite to improve heat resistant properties Teuku Rihayat; Shafira Riskina; Adi Saputra Ismy
Jurnal POLIMESIN Vol 18, No 1 (2020): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i1.1655

Abstract

This work aims to prepare and characterize polyurethane nanocomposite sequences modified with bentonite as fillers and palm oil as a soft segment component while Toluene Diisocyanate (TDI) was chosen as a hard segment component. Bentonite fillers are needed to provide heat resistance to the polyurethane coating. Morphological, structural and thermal polyurethane nanocomposites are characterized by SEM, FTIR, and TGA. FTIR analysis is the NH urethane group in palm oil polyurethane compounds while the absorption of C=O urethane group widens at 1735 cm-1. While the CH group occurs at absorption wavelengths of 2120-2180 cm-1, adding bentonite (7% by weight) is completely laminated and well dispersed in the form of a mixture of peeling / intercalating layers in the polymer matrix. Polyurethane nanocomposites have a morphology separated by clearer microphase. The resulting thermal stability is higher compared to the addition of bentonite 3 and 5% by weight. Because of its enhanced features, the polymer developed can be considered a material with heat resistance as a coating.
Study on improving thermal and compatibility behavior of gypsum PLA/stearic-lauric acid composite as phase change material Nurhanifa Aidy; Rozanna Dewi; Azhari Azhari; Teuku Rihayat; Aida Safitri; Adi Saputra Ismy
Jurnal POLIMESIN Vol 19, No 2 (2021): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i2.2278

Abstract

Commercial buildings, one of which is for hospitality, consumes a large amount of energy. The energy needs are generally dominated by lighting systems, domestic hot water systems and air conditioning systems. Energy consumption in commercial buildings and residential use of 35.3% of the total global energy use. The aim of this study is to investigate thermal properties and chemical compatibility of PCM based eutectic fatty acid (lauric-stearic) combined with polylactic acid in the pores of the gypsum that was established using the vacuum impregnation method. The procedure ensures that pla 1.5% and 2% with Lauric-Stearic (LA-SA) are mixed evenly, compared with pure gypsum and LA-SA addition. Based on TGA test  specific lauric acid and stearic acid heat analysis was performed in the modulated tga mode between 90.34oC and 369.51oC. The degradation material decreased significantly at -3.404 mg. Sample mixed between Poly lactid acid, eutectic fatty acid and gypsum  contain hydroxyl groups with significant absorptions for ft-ir analysis. The bonded oxygen-hydrogen stretching vibrations of lactid acids and gypsum,  range between 2000 and 3000 cm-1. Similarly, alcohols exhibit similar shapes at higher wavenumbers ranging from 3230 to 3550 cm-1.
Pla-zno nanocomposite paper for antimicrobial packaging application Teuku Rihayat; Suryani Suryani; Adi Saputra Ismi; Nurhanifa Nurhanifa; Shafira Riskina
Jurnal POLIMESIN Vol 17, No 2 (2019): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v17i2.1033

Abstract

Many food packages (plastic wrappers) today cannot be broken down by the environment. therefore, it is necessary to add natural substances that can make the food package decompose and be resistant to contamination with bacteria. Development of biodegradable polymers from renewable sources is highly desirable for food preservation and packaging, provided they can be effective as plastics or paper that are currently used in packaging, protecting food against microbial contamination, physical damage and chemical reactions (eg oxidation). Poly lactic acid (PLA) is one of the natural polymers produced by several bacteria that grow in crops rich in carbohydrates (such as sugar beets, corn and others). This research aims to insert ZnO nanoparticles and chitosan into a plastic layer of PLA (poly lactic acid) which can improve the antibacterial properties of the resulting packaging. The method used in making PLA-ZnO-chitosan nanocomposite is the precipitation method and the heating method. PLA-ZnO nanocomposites were obtained by varying ZnO nanoparticles 0.5% by weight, 2% by weight, and 3.5% by weight. The results obtained in SEM images show that nanoparticles are homogeneously distributed on the plastic surface. Antimicrobial tests show nanocomposites work effectively in deactivating E. coli and S. aureus. where it was found that E. coli was more susceptible to this type of nanocomposite, where there was a reduction of 3.4 logs to 3.5% ZnO loading in the PLA layer.       
Optimasi Formula Blending Produk Marine Fuel Oil Low Sulfur (MFO-LS) untuk Pemenuhan Bahan Bakar Kapal Berstandar International Maritim Organization (IMO) 2020 Fitra Dhuha; Reza Fauzan; Teuku Rihayat
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.v26i1.8971

Abstract

This study aims to optimize the blending formulation of Marine Fuel Oil Low Sulfur (MFO-LS) to comply with the International Maritime Organization (IMO) 2020 regulation, which limits sulfur content to a maximum of 0.50% m/m. The methodology involves optimization using the Generalized Refining Transportation Marketing Planning System (GRTMPS) software, followed by laboratory validation of four blending formulations. The evaluated parameters include kinematic viscosity, pour point, flash point, density, sulfur content, and other impurities based on ASTM and ISO 8217 standards. The results indicate that not all formulations met the required specifications. Blending 1 exhibited a high pour point issue, while Blending 2 failed to meet the minimum viscosity requirement. The optimal formulation was achieved in Blending 3, which utilized 40% short residue combined with distillate components such as kerosene, LVGO, and HVGO. This formulation successfully met all critical parameters, with a viscosity of 87 mm²/s, pour point of 24°C, flash point of 66°C, and sulfur content of 0.2% m/m. The findings also demonstrate that HVGO can be effectively utilized as a blending component within a 5–10% volume range without compromising product quality. Furthermore, the reformulation improves operational efficiency and economic value by maximizing the utilization of low-value residue streams. Therefore, the proposed blending strategy provides a practical and effective solution to meet global environmental regulations while enhancing the competitiveness of marine fuel products.
Analisa Kebocoran Pipa Air Pre Heater Boiler Tipe Circulating Fluidized Bed Combustion Unit-2 pada PLTU 2x30 MW PT. XYZ Teuku Syamsul Rizal; Teuku Rihayat; Reza Fauzan
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.v26i1.8950

Abstract

Tube leakage in the air pre-heater system is a critical issue affecting the reliability and efficiency of coal-fired power plants. This study investigates the causes of tube leakage in the air pre-heater of a Circulating Fluidized Bed Combustion (CFBC) boiler Unit-2 at a 2×30 MW power plant of PT. XYZ. The analysis was conducted through dimensional and thickness measurements, visual inspection, and evaluation of operating conditions, including acid dew point calculation and air preheater performance. The results indicate that wall thinning occurs locally and non-uniformly, with minimum thickness reaching 0.00 mm at certain condition, indicating perforation. The inner diameter remains relatively constant, while the outer diameter and wall thickness decrease significantly, suggesting that degradation predominantly originates from the external surface. Visual observations reveal the presence of pitting corrosion, uniform corrosion, and deposit formation on both outer and inner surfaces of the tube. The calculated acid dew point of flue gas ranges from 128.98 to 129.73°C. At low load conditions, the temperature margin between flue gas outlet and acid dew point becomes very narrow, increasing the risk of acid dew point corrosion. In addition, reduced air preheater performance prior to maintenance contributes to the development of a corrosive environment. It is concluded that tube leakage is mainly caused by progressive external erosion-corrosion, with additional contribution from acid dew point corrosion under certain operating conditions. These findings highlight the importance of temperature control, air preheater performance optimization, and periodic thickness monitoring to prevent recurring failures.
Pengembangan Bumbu Rempah Aceh Kering sebagai Inovasi Aditif Mi Aceh: Mendorong Komersialisasi Produk Lokal untuk Kemandirian Pangan di Desa Jeulikat, Blang Mangat, Lhokseumawe Teuku Rihayat; Adi Saputra Ismy; Muhammad Yazid; Haura Tunnisa; Acut Rahmatul Hidayana
Jurnal Vokasi Vol 10, No 1 (2026): Maret
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/vokasi.v10i1.8350

Abstract

Mi Aceh merupakan kuliner khas Aceh yang kaya rempah, namun sebagian besar pelaku usaha masih menggunakan bumbu basah yang mudah rusak sehingga membatasi distribusi dan pengembangan usaha. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengatasi permasalahan tersebut melalui pengembangan bumbu rempah Aceh kering yang higienis, tahan lama, dan bernilai jual lebih tinggi. Program dilaksanakan bersama Kelompok Tani Rempah Sehat di Desa Jeulikat dengan metode pelatihan partisipatif meliputi penggunaan blower oven dryer untuk pengeringan rempah, formulasi bumbu kering terstandar, pengemasan dan labeling produk, serta pelatihan pembuatan konten kreatif dan pemasaran digital. Evaluasi dilakukan melalui observasi proses produksi dan wawancara peserta. Hasil kegiatan menunjukkan peningkatan kemampuan mitra dalam pengolahan rempah, konsistensi kualitas produk, penggunaan kemasan kedap udara, serta pemahaman strategi promosi digital. Produk “Bumbu Rempah Aceh Kering Jeulikat” berhasil diformulasikan dan siap dipasarkan sebagai inovasi aditif Mi Aceh. Program ini berkontribusi pada peningkatan nilai tambah rempah lokal, penguatan ekonomi kreatif, dan peluang komersialisasi produk unggulan daerah.
Pembuatan Briket Biorang Dari Limbah Tempurung Kelapa Sawit (Elaeis Guineensis Jacq) Dengan Perekat Tepung Porang Akmal Rizki Ayub; Teuku Rihayat; Halim Zaini
Jurnal Riset, Inovasi, Teknologi & Terapan Vol 4, No 1 (2025): Desember
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/ristera.v4i1.8621

Abstract

Biorang briquettes are solid fuels derived from a mixture of powder and adhesive to form a specific shape according to the desired results through a pressing process. The purpose of this study was to determine the variation in particle size and carbonization temperature of palm shell waste on the results of biorang briquette testing. This study used two independent variables, namely the particle size of palm shell charcoal 10 mesh, 20 mesh, 40 mesh, 60 mesh and 80 mesh and the carbonization temperature of 4000C, 450 0C, 500 0C, 550 0C and 600 0C. The results showed that the higher the temperature and particle size of palm shell charcoal, the lower the water content, ash content and flame duration, while the volatile content increased with increasing temperature and particle size.
Co-Authors Acut Rahmatul Hidayana Adi Saputra Ismi Adi Saputra Ismy Aida Safitri Akmal Rizki Ayub Andi Wardana Azhari Azhari Cut Dina Mastura Cut Nazia N Dewi, Ratni Fitra Dhuha Halim Zaini, Halim Hanif, Hanif Haura Tunnisa Lukman Hakim Muhammad Yazid Nurhanifa Nurhanifa Ratna Sari Reza Fauzan Rozanna Dewi Shafira Riskina Suryani, Suryati Teuku Syamsul Rizal Uswatun Hasanah Zulkifli Zulkifli