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Megawati, Eka
Sekolah Tinggi Teknologi Migas
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Pengaruh Waktu Reaksi Pembuatan Biodiesel dari Minyak Jelantah dengan Bantuan Katalis Bassa NaOH terhadap Sifat Fisika dan Kimia Produk Biodiesel Amirul Mukminin; Eka Megawati; Debora Ariyani; I Ketut Warsa; Junety Monde; Sapril Sapril
Journal on Education Vol 5 No 2 (2023): Journal on Education: Volume 5 Nomor 2 Tahun 2023
Publisher : Departement of Mathematics Education

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Abstract

The effect of the transesterification reaction time of 0.6% mass % NaOH catalyst in the formation of methyl ester (biodiesel) made from used waste cooking oil as raw material 6 times usage and methanol 1: 5 mass has been studied at 60°C. The reaction times used were 30, 40, and 45 minutes. All samples resulting from the transesterification reaction have been studied for their chemical and physical properties. Parameters of chemical properties included in the Indonesian National Standard (SNI) for all samples were % FFA, pH, while the water content was above the SNI standard. The physical property parameters for all samples that meet SNI are only flash point, color and 90% distillation. While the density of all test samples was lower than the SNI which was set at 850-890 Kg/m3, the results obtained for reaction times of 30, 40 and 45 minutes were 828, 833 and 836 Kg/m3 respectively. The highest yield was owned by a reaction time of 40 minutes, namely 80%. As for the reaction time of 35 and 45 minutes respectively 79 and 65%.
Optimasi Flowrate dan Beban Generator Terhadap Efisiensi Turbin C60-8.883/535 di PLTU PT. XYZ Unit 3 Kapasitas 1x60 MW Eka Megawati; Marsela Gantri Pirri; I Ketut Warsa
Jurnal Pendidikan Tambusai Vol. 7 No. 2 (2023): Agustus 2023
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Komponen utama di Pembangkit Listrik Tenaga Uap (PLTU) adalah turbin uap. Turbin uap berperan penting dalam performa pada suatu pembangkit. Nilai efisiensi turbin uap dapat dimaksimalkan dengan cara menaikkan flowrate dan beban generator. Tujuan penelitian yaitu untuk mengetahui pengaruh flowrate dan beban generator terhadap efisiensi turbin uap dan mengetahui nilai optimal efisiensi turbin C60-8.883/535. Metode yang digunakan yaitu dengan perhitungan kualitas uap, entalpi, fraksi massa, daya turbin isentropik, daya turbin aktual dan efisiensi turbin. Perhitungan menggunaka trial and error dengan variasi pada nilai flowrate dan beban generator. Hasil dari perhitungan nilai efisiensi tertinggi sebesar 87,53 % yang diperoleh dari nilai flowrate 123,53t/h dan beban generator 33,09 MW. Berdasarkan perhitungan efisiensi turbin uap, maka dapat disimpulkan dengan menaikkan flowrate dan beban generator akan menaikkan nilai efisiensi pada turbin uap, dan nilai optimal turbin uap sebesar 87,53 %.
PENGARUH HEATING RATE TERHADAP KARAKTERISTIK NILAI KALOR LIMBAH KULIT BUAH NIPAH (NYPA FRUTICANS (THUNB.) WURMB) PADA PROSES SLOW PIROLISIS Yuniarti Yuniarti; Debora Ariyani; Eka Megawati
PETROGAS: Journal of Energy and Technology Vol 2, No 2 (2020): October
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v3i2.72

Abstract

Nipah-Nipah plants grow mostly in the confluence of rivers and seas. This plant has the potential to maximize all parts of the tree. Nipah fruit can be used for Nata Frutican and the basic ingredients for making flour. Unused fruit shells have a hard texture, similar to the texture of coconut shells. To increase the calorific value of this fruit peel charcoal, a pyrolysis process is carried out. The samples were separated from the following waste and dried in direct sunlight. The dry sample is crushed and then put into the combustion reactor. Pyrolysis was carried out at a constant temperature of 500°C with variations in the heating rate of 2°C/minute, 4°C/minute, 6°C/minute, 8°C/minute, and 10°C/minute and holding time for 1 hour. The results showed that the calorific value decreased with increasing heating rate. The highest calorific value is at the lowest heating rate. The calorific value at a heating rate of 2°C/minute is 6841, 02 cal/gram. ; 4°C/minute calorific value is 6811.59 cal/gram; 6°C/minute of 6745.07 cal/gram; 8°C/minute is 6656.59 cal/gram and at 10°C/minute is 6570.41 cal/gram
PEMBUATAN BIODIESESL DAN PENGARUH JENIS PELARUT DAN MASSA BIJI TERHADAP % YIELD EKSTRAK MINYAK BIJI KETAPANG (Terminalia catappa Linn) Debora Ariyani; Eka Megawati; Prapti Ira; Arnelia Sadesi; Mersya Andre Sugiarto
PETROGAS: Journal of Energy and Technology Vol 2, No 1 (2020): March
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v2i1.33

Abstract

Ketapang (Terminalia cattapa Linn) merupakan salah satu tumbuhan yang menghasilkan minyak nabati. Keterbatasan akan bahan baku untuk menghasilkan minyak yang dapat dikonversikan menjadi bahan baku alternatife pengganti minyak bumi menyebabkan berkembangnya penelitian untuk mencari tumbuhan yang berpotensi sebagai menghasilkan minyak yang dapat dijadikan bahan baku biodiesel. Penelitian ini bertujuan untuk mengetahui identifikasi dan hasil transesterifikasi dari ekstrak biji ketapang Metode yang dilakukan untuk menghasilkan minyak yang dapat dijadikan bahan baku biodiesel. Metode yang dilakukan untuk menghasilkan minyak adalah ekstraksi (perkolasi) dengan variasi massa 25 gram, 30 gram, 35 gram, 40 gram, 45 gram dan 50 gram dengan lamanya siklus ekstraksi 8 siklus. Hasil penelitian menunjukkan bahwa kadar minyak yang dimiliki ketapang mencapai 27,28% yang optimum pada penelitian ini dipengaruhi oleh variable massa, dengan massa 40 gram. Berat jenisnya dihasilkan 0,77 – 0,80 gr/ml, kandungan asam lemak bebas (%FFA) 3,7%-4,8%. Angka iod 0,22-0,33.
ANALISA PENGARUH KONSENTRASI aMDEA TERHADAP PENYERAPAN GAS KARBON DIOKSIDA (CO2) Achmad Fadlih; Eka Megawati
PETROGAS: Journal of Energy and Technology Vol 2, No 2 (2020): October
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v2i2.39

Abstract

Natural gas coming out of a well that has the same characteristics. Natural gas such as carbon dioxide (CO2) and H2S and water vapor are separated before natural gas is put into the process. This is very important because all three gases are corrosive and toxic. CO2 is an acidic gas, with the presence of water vapor will cause CO2 to be more corrosive and the freezing point of CO2 higher than methane ie the freezing point of CO2 is -56 ° C which will later cause blockages in the heat exchanger tubes (5E-1) whose temperature can reach -150 ° C. Methyldiethanolamine is a clear, colorless or pale yellow liquid with an ammonia odor. Methyldiethanolamine dissolves with water, alcohol and benzene. The study uses correlation and regression analysis methods that aim to see how influential the concentration of aMDEA is in absorbing CO2. Data analysis uses regression equations and coefficient of determination. Based on observations obtained that the effect of aMDEA concentration on CO2 absorption is fairly weak or has little effect because the coefficient of determination is 0.0012 or 1.2% which indicates that the relationship is very weak or has little effect.
ANALISA HASIL LIMBAH PLASTIK BERDASARKAN DISTILASI Eka Megawati; Bustam Sulaiman; I Ketut Warsa
PETROGAS: Journal of Energy and Technology Vol 2, No 1 (2020): March
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v2i1.32

Abstract

Mengingat kandungan energi yang tinggi dari bahan bakar plastik, maka potensi pemanfaatannya sebagai salah satu sumber energi memililiki prospek yang cukup bagus di masa mendatang. Tujuan penelitian ini menganalisa Spesifik Grafity (SG) dan menganalisa Initial Boiling Point (IBP) dan Final Boiling Point (FBP) dari hasil distilasi. Peralatan yang digunakan adalah satu set instalasi pengolahan plastik yang dirakit secara manual dan limbah padat plastik. Sebelum reactor dipergunakan, sampah plastik dijemur terlebih dahulu pada panas matahari. Sampah plastik yang telah dikeringkan dan dipilah dari zat pengotor dan dipotong sampai kecil. Kemudian dimasukkan ke dalam tempat umpan reaktor. Setelah itu, pemanas reactor dioperasikan. Pembakaran plastic atau proses pirolisis dilakukan sebanyak dua kali dengan total massa limbah plastik 4000 gr dan menghasilkan 975 ml. Dari hasil uji SG sebanyak dia kali, diperoleh rata-rata SG dari hasil pirolisis adalah 0,75835 dengan Initial Boiling Point (IBP) 67oC. Hal tersebut dapat diartikan bahwa SG tersebut mendekati SG Kerosin dan hasil IBP berada pada 67 oC dengan FBP yang belum terdeteksi.
ANALISA POTENSI PENINGKATAN KINERJA HHP BOILER BERDASARKAN PRINSIP NERACA PANAS I Ketut Warsa; Yuniarti Yuniarti; Eka Megawati
PETROGAS: Journal of Energy and Technology Vol 3, No 1 (2021): March
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v3i1.52

Abstract

The boiler is in charge of generating steam. The steam produced can be used for several purposes, among others: as a working fluid to drive steam engines such as turbine engines and compressor piston engines, as a heating medium for heating liquids so that they are always at a set temperature, as an auxiliary medium for processing and so on. . In the context of energy conservation today, energy use is very much taken into account, because energy consumption is closely related to operating costs. In principle, the more energy consumed means higher operating costs. For energy savings, it is expected that fuel consumption in the operation of the HHP Boiler is as optimal as possible, so as to provide the appropriate heat. To find out the above, it is necessary to calculate the performance of the boiler. In this case the compilers use the Heat Loss method with dual fuel (fuel oil and fuel gas). From the evaluation results of the HHP Boiler with a heat balance, the efficiency is 89.53%.
Pengaruh Waktu Terhadap Nilai Kalor Bioarang Hasil Pirolisis pada Temperatur yang Konstan Yuniarti Yuniarti; Meita Rezki Vegatama; Eka Megawati; Nor Sofiana
PETROGAS: Journal of Energy and Technology Vol 1, No 2 (2019): October
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v1i2.23

Abstract

Dalam penelitian ini cangkang kulit aren dimanfaatkan sebagai bahan bakar alternatif dengan cara mengubahnya menjadi bioarang sebagai bahan utama pembuatan briket. Tujuan pembuatan bioarang untuk mengetahui kualitas bioarang yang baik dan mengetahui pengaruh variasi waktu terhadap nilai kalor Manfaat pembuatan bioarang selain sumber bahan bakar alternatif,juga digunakan untuk engurangi penimbunan sampah yang menyebabkan pencemaran lingkungan. Pengarangan atau dikenal dengan pirolisis adalah degradasi termal senyawa lignin dengan kondisi tanpa atau hampir tidak ada udara. Pengarangan dilakukan dengan variasi waktu 1,5 jam, 2 jam, 2,5 jam, dan 3 jam. Hasil dari pengarangan yang dinamakan bioarang dianalisa nilai kalornya menggunkan calorimeter bomb. Hasil penelitian menunjukan persentase nilai kalor tertinggi cangkang kulit aren berada pada waktu 2 jam dengan nilai kalor sebesar 5037, 3 cal/gram. Berdasarkan hasil pengujiaan nilai kalor yang diperoleh menunjukkan bahwa bioarang kulit aren (Arenga Pinnata) dapat dimaanfatkan sebagai bahan bakar alternatif yang dapat diperbahuri.
OPTIMASI FLOW FEED GAS TERHADAP FLOW AMINE PADA KOLOM CO₂ REMOVAL Eka Megawati; Yoga Hanggara Pradipta; I Ketut Warsa; Yuniarti Yuniarti
PETROGAS: Journal of Energy and Technology Vol 4, No 1 (2022): March
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v4i1.83

Abstract

The process of liquefying natural gas to produce a product in the form of LPG (Liquefied Petroleum Gas) takes place at a very low temperature of -160ºC. Meanwhile, the gas feed contains a component in the form of carbon dioxide (CO₂) which has a freezing point of -56ºC. The CO₂ separation process is carried out in the CO₂ removal unit which consists of an absorber and an amine regenerator. In the absorber tower, there is a separation process of CO₂ gas components which will be separated by absorption by an amine solution. Amine flow must be adjusted to the flow feed gas that enters the absorber column so that there is no excess amine in the purification process, so the purpose of this study is to determine the maximum value of flow feed gas to get the optimal value of flow amine. The calculation method for finding the maximum flow amine uses trial and error calculations, where the value of the gas flow feed is varied. Based on research can be concluded that, by varying the increase in gas flow feed from 359 m³/h obtained the maximum value of gas flow feed which is 8195 m³/h which produces an optimal flow amine value of 1200,005 m³/h.
PENGARUH 6, 8 DAN 10 KALI PEMAKAIAN MINYAK JELANTAH TERHADAP RENDEMEN HASIL REAKSI TRANSESTERIFIKASI MENGGUNAKAN KATALIS BASA HOMOGEN NaOH Amirul Mukminin; Debora Ariyani; Eka Megawati; Yuniarti Yuniarti
JURNAL INOVASI PENDIDIKAN DAN SAINS Vol 4 No 2 (2023): Agustus
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Nahdlatul Wathan Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51673/jips.v4i2.1709

Abstract

Telah dilakukan penelitan pengaruh pemakaian minyak jelantah 6, 8 dan 10 kali pemakaian terhadap % rendemen pembentukan metil ester (biodiesel ) menggunakan katais basa homogen NaOH 0,6% massa. Seluruh sampel minyak jelantah direaksikan dengan methanol dengan perbandingan reaktan 1:5 % massa. Reaksi transesterrifkasi masing-masing sampel dilakukan pada suhu 60°C selama 40 menit. Hasil rendemen sampel minyak jelantah 6 kali pemakaian sebesar 96,6%, sedangkan 8 dan 10 kali pemakian menunjukkan nilai yang tidak jauh beda yaitu masing-masing 96,4 dan 96 % massa. Gas Chromatography (GC) dan Mass Spectrocopy (MS) mendeteksi 14 puncak senyawa dan bahwa 3 puncak tertinggi yang menunjukkan bahwa kandungan sampel adalah suatu metil ester. Masing-masing puncak garis 4 merupakan metil palmitat (C17H34O2) dengan luas area 36,66 %, puncak garis 6 adalah metil oleat (C19H36O2), luas area 55,7% dan waktu retensi 17.92 menit ; puncak garis 7 adalah metil nonadekanoat (C20H40O2) dengan luas area 4,41% dan waktu retensi 18,093 menit.
Co-Authors A. M. Miftahul Huda Abdul Rahmat Achmad Fadlih Achmad Fadlih Achmad Rifandi Adittya Octavian P Putra Adittya Octavian Perdana Putra Adnan Mufti Naufal Aici Ichtiarizak Machrifah Ain Sahara Alfin, Akhmad Amiruddin Amirul Mukminin Amirul Mukminin Amirul Mukminin Amirul Mukminin Amirul, Amirul Ana Dewi ANDIKA SAPUTRA Andra Hendrawan Pratama Apriliya Prastika Anggraini Arham Ardiansyah Arief Adhiksana Arief Adhiksana Ariyani, Debora Arnelia Sadesi Baiq Maulinda Ulfah Bustam Sulaiman cantika Dawi Yanti Debora Ariyani Dedora Ariyani Derbika, Rangga Dewi, Ana Dian Islamiati Elya Rahmadany Esterina Natalia Paindan Fatma Fitri Oktafiani Frilly, Frilly Gabriel Pamasi HARJANTO HARJANTO Hayu Dian Yulistianti Hidayat, Ghazian Zhafiri I Ketut Warsa I Ketut Warsa Julianty, Rachma Sherlyn Junety Monde Kumalasari, Prapti Ira machrifah, Aici ichtiarizak Manik, Nijusiho Marsela Gantri Pirri Maulidyawati, Putri Meita Rezki Vegatama Mersya Andre Sugiarto Mohammad Lutfi Monde, Junety Muh Irwan, Muh Muhammad Aditya Arisma Muhammad Iqbal Muhammat Rahmat Ilham N. Nurjanah Nixie Naiya Althea Nor Sofiana Norhan Effendi Norhan Effendi Nusrotus Sa'idah Parman, Mohammad Zulfikar Patmawati, Yuli Pirri, Marsela Gantri Prapti Ira Pratama, Aji Indrayan Putri Lestari, Putri Rahmadani Ramadhanie, Muhammad Hilal Resmihadi Risna Risna Risna, Risna Rohima Sera Afifah Rudiyanto Rudiyanto, Rudiyanto Sa'idah, Nusrotus Sahrul Rhomadan Sapril Sapril Sarungallo, Rosalia Sira Setiawan, Mochammad Wahyu Sholeha, Mirajatus Subuhqi, Arryf Rahmad Ulfa, Elis Diana Vegatama, Meita Rezki Vegatama, Meita Rezki Rezki Veny Luvita, Veny Wildan Azizul Umaro Yanti, Dawi Yoga Hanggara Pradipta Yulistianti, Hayu Dian Yuniarti Yuniarti Yuniarti Yuniarti Yuniarti Yuniarti