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All Journal Jurnal Sains dan Teknologi Reaksi Jurnal Vokasi Hydrogen: Jurnal Kependidikan Kimia Jurnal Teknologi Jurnal Riset, Inovasi, Teknologi & Terapan
Sariadi Sariadi
Program Pascasarjana, Universitas Syiah Kuala
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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PEMANFAATAN ZEOLIT ALAM SEBAGAI ADSORBEN PADA PEMURNIAN ETANOL Haryadi, Haryadi; Sariadi, Sariadi; Fona, Zahra
Jurnal Sains dan Teknologi Reaksi Vol 12, No 2 (2014): Jurnal Sains dan Teknologi Reaksi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v12i2.196

Abstract

Penelitian tentang penggunaan zeolit alam (ZA) sebagai adsorben untuk menyerap air dalam etanol telah dilakukan. Tujuan penelitian ini adalah untuk mengevaluasi kemampuan ZA yang telah diaktivasi dalam penyerapan air dalam etanol. Aktivator yang digunakan adalah larutan H2SO4 1N dan larutan HCl 1N. ZA dihaluskan dan diayak menggunakan ayakan 60, 80, dan 100 mesh. Sebanyak 35 gram ZA yang telah dihaluskan dicampurkan dengan aktivator dan diaduk selama 30 menit kemudian diendapkan selama 24 jam. Residu dicuci sampai netral dan dipanaskan menggunakan furnace pada temperatur 400oC selama 2 jam. ZA yang telah diaktifkan digunakan untuk mengabsorbsi air yang terkandung dalam etanol yang mempunyai konsentrasi 60%, 65 %, 70%, dan 80%. Hasil penelitian menunjukkan bahwa effisiensi penyerapan air dalam etanol mencapai 19,7% oleh zeolit yang diaktivasi menggunakan larutan H2SO4 1N. Namun demikian, pada adsorpsi air dalam etanol yang memiliki konsentrasi lebih dari 60%, etanol cenderung ikut teradsorpsi oleh ZA sehingga kadar air dalam etanol menjadi sedikit lebih tinggi dibandingkan dengan etanol sebelum adsorbsi.Kata kunci: Adsorben, zeolit, kadar Air, aktivasi, penyerapan.
PEMANFAATAN KULIT KOPI MENJADI BIOBRIKET Sariadi, Sariadi
Jurnal Sains dan Teknologi Reaksi Vol 7, No 1 (2009): Jurnal Sains dan Teknologi Reaksi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v7i1.104

Abstract

Industri kilang kopi, selain menghasilkan produk utama berupa biji kopi juga menghasilkan limbah padat berupa sekam dan kulit kopi. Limbah tersebut tersebut dimanfaatkan sebagai bahan bakar alternatif dalam bentuk briket. Pada proses pembuatan briket, dilakukan tahapan karbonisasi sehingga diperoleh pembakaran sekam dan kulit kopi menjadi arang briket. Hasil pembakaran tersebut di ayak terlebih dahulu dengan ukuran partikel yang diinginkan yaitu 0.150 mm, dan 0.180 mm. Selanjutnya arang kulit kopi yang dihasilkan dari proses karbonisasi dicampurkan dengan perekat berupa kanji dengan perbandingan perekat 5 %, 6 %, dan 7 % dari berat arang sekam dan kulit kopi yang bertujuan untuk mengikat partikel – partikel serbuk arang. Setelah itu campuran tersebut dipadatkan dan dicetak pada alat cetak. Analisa kualitatif dilakukan dengan menganalisa nilai kalor menggunakan bomb calorimetri dan kadar air. Adapun nilai kalor yang tertinggi dan kadar air didapatkan pada perbandingan 5% perekat dengan ukuran partikel 0.150 mm. Untuk sekam kopi diperoleh nilai kalor sebesar 7604.0899 cal/gr dan kadar air 15.77 %, sedangkan untuk kulit kopi diperoleh nilai kalor dengan ukuran partikel 0,150 mm dengan nilai bakar 6457.0574 cal/gr dan kadar air 12.07%. Hasil menunjukan semakin kecil ukuran partikel dan semakin sedikit perekat, maka nilai kalor semakin tinggi.Kata kunci : Kulit kopi, sekam kopi, kanji, nilai kalor, kadar air
PEMANFAATAN ZEOLIT ALAM SEBAGAI ADSORBEN PADA PEMURNIAN ETANOL Haryadi, Haryadi; Sariadi, Sariadi; Fona, Zahra
Jurnal Sains dan Teknologi Reaksi Vol 6, No 2 (2008): Jurnal Sains dan Teknologi Reaksi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v6i2.96

Abstract

Penelitian tentang penggunaan zeolit alam (ZA) sebagai adsorben untuk menyerap air dalam etanol telah dilakukan. Tujuan penelitian ini adalah untuk mengevaluasi kemampuan ZA yang telah diaktivasi dalam penyerapan air dalam etanol. Aktivator yang digunakan adalah larutan H2SO4 1N dan larutan HCl 1N. ZA dihaluskan dan diayak menggunakan ayakan 60, 80, dan 100 mesh. Sebanyak 35 gram ZA yang telah dihaluskan dicampurkan dengan aktivator dan diaduk selama 30 menit kemudian diendapkan selama 24 jam. Residu dicuci sampai netral dan dipanaskan menggunakan furnace pada temperatur 400oC selama 2 jam. ZA yang telah diaktifkan digunakan untuk mengabsorbsi air yang terkandung dalam etanol yang mempunyai konsentrasi 60%, 65 %, 70%, dan 80%. Hasil penelitian menunjukkan bahwa effisiensi penyerapan air dalam etanol mencapai 19,7% oleh zeolit yang diaktivasi menggunakan larutan H2SO4 1N. Namun demikian, pada adsorpsi air dalam etanol yang memiliki konsentrasi lebih dari 60%, etanol cenderung ikut teradsorpsi oleh ZA sehingga kadar air dalam etanol menjadi sedikit lebih tinggi dibandingkan dengan etanol sebelum adsorbsi.Kata kunci : Adsorben, zeolit, kadar Air, aktivasi, penyerapan.
Analisa Kinerja Heat Recovery Steam Generation Akibat Perubahan Load Turbin Power Generator untuk Proses LNG Hub dan Efisiensi Operasional di Perusahaan Migas Muchlis, Muchlis; Sariadi, Sariadi; Harunsyah, Harunsyah
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5197

Abstract

Problems that occur with the HRSG will be calculated and performed by performance analysis of the equipment. With various methods and formulas that will be used. The aim of the research is to calculate HRSG efficiency before and after cleaning in power generation systems using Matlab software, determine the effect of HRSG efficiency before and after cleaning and understand how to optimize HRSG performance. HRSG efficiency calculations in this research were carried out by comparing the energy flow rate used to evaporate water, both in low pressure steam and high pressure steam and the energy flow rate contained in the exhaust gas from the gas turbine power plant system which is useful in HRSG. HRSG performance calculations based on changes in load for LNG hub operational business processes and operational efficiency in power usage, such as calculating mass balance, calculating energy balance, calculating HRSG performance efficiency in LNG hub operational conditions, calculating HRSG performance efficiency in actual conditions after the event LNG hub process and efficiency of power use in operations, comparison between HRSG performance efficiency in actual conditions and design data efficiency at commissioning. So the results obtained were an efficiency of 61.37% and there was a decrease in performance after being compared with the commissioning design data of 38.32%.
Pengaruh Penambahan Ekstrak Daun Kecombrang (Etlingera Elatior) sebagai Inhibitor Korosi Baja Karbon dalam Media Air Laut Hayati, Ratnal; Sariadi, Sariadi; Yunus, Muhammad
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.4974

Abstract

Carbon steel is a type of metal that is widely used in industry. However, carbon steel has a weakness, namely that it corrodes easily. One way to control corrosion is by adding inhibitors. The use of organic inhibitors is preferred considering the negative impact of inorganic inhibitors. In this research, kecombrang leaf extract was used as organic inhibitors. The kecombrang leaf extract has the –OH and CH functional groups which can be adsorbed by metal surfaces and can inhibit corrosion. Determination of the rate of corrosion in carbon steel using the weight loss method in sea water media. The results of the research obtained that kecombrang leaves which got the best results using the weight loss method based on concentration variants, namely 0,1,3,5, and 7 mL and soaking times of 3, 6, 9, and 12 days, which shows that the corrosion rate decreases with increasing concentration of kecombrang leaf extract. In varying concentrations, the optimum inhibition efficiency was found at a concentration of 7 mL and at 12 days immersion time, namely 75.88% and the corrosion rate was 0.9735 mpy so this result was the best corrosion rate test. Analysis of the carbon steel surface using SEM shows that the carbon steel surface has been protected by a layer of kecombrang leaf extract inhibitor.
Pembuatan Komposit Poly Lactid Acid – Bentonit untuk Plastik Biodegradable Salsabila, Syifa; Ridwan, Ridwan; Sariadi, Sariadi
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5594

Abstract

Plastic is one of the most important materials in human daily activities because of its versatility. Plastic usually comes from petroleum, so it can't be decomposed. This study aims to determine the effect of the ratio and temperature of mixing poly lactid acid and bentonite on the quality of biodegradable plastic products. With variations in the composition of PLA: Bentonite 17: 3 ; 15: 5; 13 : 7 ; and 11 : 9g and temperature variation when mixing PLA and bentonite 180℃, 190℃, 200℃, 210℃. The synthesized composites were tested for their mechanical strength to determine material characteristics and morphological observations. The results showed that addition of bentonite filler affects the mechanical properties and thermal properties of the material.. The highest tensile strength value was produced by the material with a variation of PLA and bentonite 13 : 7g at a temperature of 200℃ which was 15.29 MPa and the lowest tensile strength value was produced by a material with a variation of PLA and bentonite at a temperature of 190℃ of 1.89 MPa. The morphological tests showed that the surface structure of the 13g PLA and 7g bentonite samples during processing showed that the surface structure of poly lactic acid (PLA) was widely dispersed due to electromagnetic rays. In the Thermo Gravimetric Analyzer test, samples with modified PLA-bentonite with a PLA-bentonite degradation temperature for samples of 17:3 are 320 ℃ - 480 ℃. The degradation temperature of PLA-Bentonite for the 13:7 sample is 420℃ - 520℃.
Penerapan Teknologi Ice Maker sebagai Upaya Penguatan Ekonomi Kelompok Pedagang Ikan Peumakmu Nanggroe di Aceh Tamiang Sariadi, Sariadi; Fauzan, Reza; Hendrawaty, Hendrawaty
Jurnal Vokasi Vol 9, No 1 (2025): Maret
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/vokasi.v9i1.6076

Abstract

Desa Ujong Tanjong, yang terletak di Kecamatan Manyak Payed, Kabupaten Aceh Tamiang, merupakan desa dengan mayoritas penduduk berprofesi sebagai nelayan. Di desa ini, terdapat Kelompok Pedagang Ikan Peumakmu Nanggroe yang berperan dalam mengumpulkan hasil tangkapan ikan dan menjualnya ke kota untuk memperoleh harga yang lebih tinggi. Proses pengawetan ikan yang digunakan selama ini masih mengandalkan es batu yang diproduksi dengan kulkas freezer konvensional. Namun, metode ini kurang efisien karena membutuhkan waktu produksi yang lama (sekitar 24 jam) dan es yang dihasilkan cepat mencair. Melalui program Pengabdian Kepada Masyarakat (PKM), Tim Politeknik Negeri Lhokseumawe berkolaborasi dengan mitra untuk melakukan intervensi teknologi dengan memperkenalkan mesin Ice Maker. Mesin ini mampu memproduksi es batu dalam waktu 2 jam, dengan kapasitas produksi hingga 250 es batu per hari, sehingga mampu memenuhi kebutuhan nelayan setempat. Hasil kegiatan PKM ini berupa penyerahan mesin kepada mitra, yang secara signifikan meningkatkan efisiensi operasional dan produktivitas kelompok pedagang ikan. Dampak dari kegiatan ini turut berkontribusi dalam meningkatkan ekonomi mitra serta memperkuat daya saing sektor perikanan di desa tersebut.
Analisis Pengaruh Variasi Komposisi Bahan Baku Terhadap Kualitas Briket Dalam Aplikasi Pembakaran Aulia, M. Dava; Nahar, Nahar; Sariadi, Sariadi
Jurnal Riset, Inovasi, Teknologi & Terapan Vol 3, No 2 (2025): Juni
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/ristera.v3i2.7441

Abstract

This study examines the characteristics of briquettes from the composition of coffee grounds, wood powder and coconut shells using adhesive variations. This study was designed using independent variables, namely variations in the composition of raw materials using samples (A, B, C) % and adhesives (10, 12, 15). The raw materials are carbonized at a temperature of 300°C.  The process of making briquettes begins using charcoal crushing and uniformity of charcoal particle sizes to 40/60 mesh, charcoal mixed with tapioca flour as the adhesive material, then briquette dough is formed and molded using a pressure of 7 bars and dried in an oven at a temperature of 105°C for 2 hours. Furthermore, charcoal is characterized including 5 test parameters, namely moisture content, ash content, calorific value and combustion rate, then the best results are analyzed by Thermal Gravimetry Analysis (TGA). The best results obtained from this study were in the form of B2 samples using a ratio of 35 : 65 for coffee grounds: coconut shells using an adhesive concentration of 12%. The moisture content value was 6.12%, the ash content was 6.21%, the burning rate was 0.192 grams/minute and the calorific value was 6067.03 cal/g. The results obtained in this study stated that the moisture content, ash content, and calorific value had met SNI 01-6235-2000. The conversion of the calorific value of 1 kg of arabica briquettes creates an electric power of 6,683 kWh/kg, so to get 1 kWh of electrical energy requires 0.142 kg.
The Catalytic Performance of Vanadium–Nickel Supported on Zeolite for the Conversion of Crude Palm Oil into Short-Chain Hydrocarbons Rahmahwati, Cut Aja; Salmyah, Salmyah; Sami, Muhammad; Sariadi, Sariadi
Jurnal Teknologi Vol 25, No 2 (2025): Agustus 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i2.7030

Abstract

The increasing global demand for fossil fuels, alongside declining domestic oil production, has intensified interest in renewable energy sources. Among Indonesia's abundant biomass options, crude palm oil (CPO) is a promising candidate for biofuel production due to its high triglyceride content and chemical similarity to petroleum. This study explores the catalytic cracking of CPO using a vanadium–nickel catalyst supported on natural zeolite, aiming to evaluate its physicochemical properties and catalytic performance in converting CPO into short-chain hydrocarbons for potential use as biogasoline. The catalyst was synthesized via wet impregnation of natural zeolite with ammonium metavanadate and nickel nitrate hexahydrate, followed by calcination. Characterization using Thermogravimetric Analysis (TGA), X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM) confirmed good thermal stability, crystallinity, and surface morphology. Catalytic cracking was performed at elevated temperatures under atmospheric pressure. The liquid products were analyzed using Gas Chromatography-Mass Spectrometry (GC-MS). The results showed that the catalyst successfully facilitated the breakdown of triglycerides, producing mainly medium-chain fatty acids. Pentadecanoic acid (C₁₅H₃₀O₂) was identified as the dominant compound, indicating partial cracking of CPO. However, the product composition still contained oxygenated species, suggesting incomplete deoxygenation. Consequently, the resulting mixture does not yet meet biogasoline specifications. These findings highlight the potential of vanadium–nickel/zeolite catalysts in biofuel conversion processes, while also emphasizing the need for further catalyst optimization or additional processing stages to achieve complete transformation into fuel-grade hydrocarbons.
Application of Indigenous Knowledge in Building Resilience: A Case Study of the Construction of Bayan Traditional Houses in Lombok Sariadi, Sariadi; Kurnia, Nova; Sukarma, I Ketut; Herayanti, Lovy; Habibi, Habibi; Azmi, Irham
Hydrogen: Jurnal Kependidikan Kimia Vol. 11 No. 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.14691

Abstract

The Bayan traditional house in Lombok, West Nusa Tenggara, exemplifies traditional architecture that integrates Indigenous Knowledge (IK) in building construction. This study aims to analyze the construction techniques of the Bayan traditional house in enhancing earthquake resistance and environmental adaptation while exploring its potential application in sustainable modern architecture. A qualitative research approach with a case study design was employed, incorporating participant observation, in-depth interviews with key informants, and document and visual analysis. Findings reveal that Bayan traditional houses utilize distinctive construction techniques such as nail-free wooden joinery, flexible local materials like bamboo and hardwood, and thatched roofs that adapt to tropical climates. These techniques enhance structural flexibility in absorbing seismic shocks while providing optimal thermal efficiency and natural ventilation. These findings align with previous studies indicating that IK-based structures demonstrate greater resilience compared to modern concrete buildings. This study asserts that IK principles in Bayan traditional houses can be integrated into contemporary architectural design to create more environmentally friendly and disaster-resilient buildings. Therefore, policies promoting the adoption of IK-based construction techniques in modern housing and infrastructure development are essential to enhance sustainability and disaster preparedness in the future.
Co-Authors Aulia, M. Dava Azmi, Irham Fona, Zahra Habibi Habibi Harunsyah, Harunsyah Haryadi - Hayati, Ratnal Hendrawaty Hendrawaty, Hendrawaty Ismi, Adi Saputra KETUT SUKARMA . Kurnia, Nova Lovy Herayanti Muchlis Muchlis Muhammad Yunus Nahar, Nahar Rahmahwati, Cut Aja Reza Fauzan Ridwan, Ridwan Safrida, S Salmyah, Salmyah Salsabila, Syifa Sami, Muhammad