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All Journal Reaktor Fondasi: Jurnal Teknik Sipil IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Jurnal Penelitian Pendidikan IPA (JPPIPA) Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Teknik Portal: Jurnal Teknik Sipil Jurnal Daur Lingkungan Teknika Sains : Jurnal Ilmu Teknik Jurnal Bio-Geo Material Dan Energi Makara Journal of Science Jurnal Teknik Sipil Institut Teknologi Padang
Oki Alfernando
Chemical Engineering Department, Engineering Faculty, Universitas Jambi, Jambi, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Pengolahan POFA (Palm Oil Fuel Ash) dan Semen Sebagai Material Alternatif Timbunan Pilihan Jalan Untuk Perbaikan Infrastruktur Jalan Dila Oktarise Dwina; Nazarudin Nazarudin; Oki Alfernando; Dyah Kumalasari; Tia Nofrina
Jurnal Fondasi Vol 11, No 1 (2022)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fondasi.v0i0.13734

Abstract

Perkembangan industri kelapa sawit yang terus meningkat berdampak terhadap limbah kelapa sawit berupa abu sisa pembakaran cangkang sawit atau dikenal dengan POFA (Palm Oil Fuel Ash). Salah satu cara menekan jumlah POFA ialah dengan memanfaatkannya dalam bidang Teknik Sipil. Pada penelitian ini limbah kelapa sawit berupa abu sawit (POFA) dimanfaatkan sebagai material untuk timbunan pilihan dalam konstruksi perkerasan jalan. Selain menggunakan POFA penelitian ini juga menggunakan bahan tambahan berupa semen dengan persentase penambahan sebesar 2%, 4%, 6% dan 12%. Hasil pengujian CBR rendaman (soaked) dan UCS dilaboratorium menunjukkan bahwa nilai CBR dan UCS mengalami peningkatan seiring dengan bertambahnya kadar semen disetiap variasi. Nilai CBR dan UCS mengalami kenaikkan dan mencapai nilai maksimum pada penambahan kadar 12 % yaitu sebesar 28,01% untuk CBR dan 4,903 kg/cm2 untuk UCS. Nilai yang diperoleh sudah memenuhi standar dan dapat digunakan sebagai material timbunan pilihan.
Synthesis and Characterization of ZSM-5 Catalyst for Catalytic Pyrolysis of Empty Fruit Bunches Lutfia Rahmiyati; Susila Arita; Leily Nurul Komariah; Nazarudin Nazarudin; Oki Alfernando
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 2 (2019): June 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i2.72

Abstract

ZSM-5 is known as a heterogeneous catalyst in the process of petroleum cracking. Zeolite has narrow pores so it needs synthesis to form mesopore so that reactant molecules can enter the active site in ZSM-5 mesopore. In this study, mesopore formation was carried out by adding Si/Al components with a ratio of 20 derived from tetraethyl orthosilicate, aluminum isopropoxide and TPAOH template with hydrothermal process. The resulting ZSM-5 was characterized using x-ray diffraction, scanning and electron microscopy (SEM). The XRD characterization results showed that the ZSM-5 synthesized to form mesopore was seen from a fairly high peak intensity in the range at 2-theta were 8.11, 9.01°; 23.27°; 23.49°; and 24.13°. The results of this study already have the same structure as the commercial ZSM-5. Characterization of SEM-EDS showed that Si-Al and Na elements in ZSM-5 were 96.43%, 3.56% and 0% wt, respectively. With a magnification of 20000x, this cluster is quite homogeneous even though the crystallization formed is not well aggregated. This ZSM-5 catalyst will be applied to the process of biomass into bio-oil.
PERENGKAHAN KATALITIK MINYAK JELANTAH MENGGUNAKAN KATALIS Co-CARBON YAND DIHASILKAN DENGAN METODE ION EXCHANGE NM Yuhermita; Nazarudin Nazarudin; Oki Alfernando; IG Prabasari; M Haviz
Journal BiGME Vol. 1 No. 1 (2021): Journal of Bio-Geo Material and Energy (BiGME), March 2021
Publisher : PUI BiGME Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/bigme.v1i1.12307

Abstract

Penggunaan bahan bakar yang terus meningkat mengakibatkan cadangan minyak bumi mengalami penurunan. Bahan bakar minyak (BBM) yang berasal dari fosil tidak dapat diperbaharui. Biofuel adalah salah satu sumber energi alternatif. Pembuatan Biofuel dapat dilakukan dengan perengkahan termal dan perengkahan katalitik minyak goreng bekas. Minyak goreng bekas dapat menjadi biofuel dengan proses perengkahan katalitik menggunakan katalis Co-Arang. Penelitian ini meliputi preparasi katalis kobalt-arang aktif dengan metode ion exchange, Karakterisasi katalis, dan perengkahan katalitik minyak jelantah. Konsentrasi larutan logam yaitu 1%, 2%, dan 3%, dengan variasi temperatur perengkahan yaitu 450°C, 500°C, 550°C. Karakterisasi dengan XRD menunjukkan struktur atom karbon berbentuk struktur amorf. Hasil karakterisasi dengan SEM-EDX didapatkan hasil logam kobalt yang teremban yaitu sebesar 0,86%, 1,99% dan 0,11%. Konversi rata-rata (%) CHP perengkahan minyak jelantah pada Konsentrasi katalis 1%, 2% dan 3% adalah 31,83%, 8,51% dan 11,43%. Produk perengkahan maksimum di dapatkan pada temperatur 450oC dengan konsentrasi Co-Arang 1% yaitu 47,55%. Energi aktivasi perengkahan yaitu -40,64 kJ, 71,03 kJ dan 29,98 kJ.
THE EFFECT OF TEMPERATURE ON THE PERFORMANCE OF ACTIVATED CARBON OVER CATALYTIC CRACKING OF CRUDE PALM OIL Nazarudin Nazarudin; Ulyarti Ulyarti; Oky Alfernando; Ira Galih; Susilawati Susilawati; Aris Doyan
Jurnal Penelitian Pendidikan IPA Vol. 5 No. 1 (2019): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v5i1.175

Abstract

This research was carried out to investigate the effect of temperature in carbon production on its performance in the catalystic cracking of CPO to fuel.  The carbon was produced using palm shell at 2 different temperatures (450 and 550oC).  The cracking of CPO was carried out with and without the active carbon catalyst.  The result showed that the use of catalyst increase the conversion of both gas and liquid conversion.  The use of higher temperature in the production of active carbon catalyst increased the performance of the catalyst, in particular, for the liquid conversion. Keywords :Activated carbon, catalyst, catalytic cracking, crude palm oil
Stabilisasi Tanah Gambut Menggunakan Pofa Sisa Pembakaran Cangkang Sawit Ditinjau dari Nilai CBR Del Zamre Ikhlas; Dila Oktarise Dwina; Ade Nurdin; Oki Alfernando
Portal: Jurnal Teknik Sipil Vol 14, No 1 (2022): Edisi April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v14i1.2904

Abstract

penelitian ini membahas pemamfaatan abu limbah pembakaran cangkang sawit (POFA). Variasi penambahan POFA yaitu 0%, 30%, 35%, 40%, 45%, terhadap berat tanah kering dengan waktu pemeraman 0 hari, 7 hari.  Tujuan penelitian ini untuk mengetahui daya dukung tanah dengan penambahan material berupa POFA di tinjau dari nilai CBR. Hasil yang diperoleh dari penelitian ini yaitu tanah gambut asli sebagai tanah dengan kandungan organik yang tinggi termasuk kedalam golongan A-8 menurut sistem AASHTO dan disimbolkan dengan peat berdasarkan sistem USCS. Sampel tanah pada lokasi tangkit baru termasuk tanah yang memiliki daya dukung yang jelek karena memiliki nilai CBR 2,43%. Pada tanah campuran POFA diperoleh nilai CBR yang meningkat pada umur pemeraman 0 dan 7 hari sebesar 2,83%, 3,55% CBR tertinggi didapat pada variasi campuran 45% POFA terhadap tanah kering dengan masa pemeraman 7 hari yaitu sebesar 3,55%.
Catalytic Cracking of Methyl Ester from Used-Cooking Oil Using Ni-Impregnated Active Charcoal Catalyst Nazarudin Nazarudin; Ulyarti Ulyarti; Oki Alfernando; Yogie Yogendra Hans
Reaktor Volume 22 No. 1 April 2022
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (40.96 KB) | DOI: 10.14710/reaktor.22.1.21-27

Abstract

Current petroleum energy sources have been starting to diminish along with the increasing a demand in industries and transportations. In the next few years Indonesia is predicted to experience a fuel crisis. One way to solve this problem is to find the alternative energy sources from renewable raw materials. This study was conducted to obtain alternative renewable energy sources through catalytic cracking of used cooking oil-derived methyl ester into biofuel using active charcoal catalyst.  The active charcoal was made out of solid waste (shells) of the oil palm industry. Nickel solutions of varying concentrations (1%, 2%, 3%) ware impregnated into active charcoal to produce the Ni- charcoal catalyst. This catalyst was then used for catalytic cracking of methyl esters with variations in the reaction temperature of 400oC, 450oC and 500oC. The Methyl ester was produced from filtered used-cooking oil by transesterification method. SEM-EDX analysis showed that Nickel metal was successfully embedded into active charcoal where the highest concentration of Nickel (18.4%) was found at a impregnation treatment using 2% of Nickel solution. From the SEM image, it can also be seen that the catalyst produced unique pores. The gravimetric analysis of the catalytic cracking product showed that the highest fraction of oil liquid resulting from catalytic cracking at 400oC using Ni-charcoal catalyst impregnated with 3% Nickel solution.
Catalytic Cracking of Methyl Ester from Used Cooking Oil with Ni-Ion-Exchanged ZSM-5 Catalyst Alfernando, Oki; Sarip, Rozie; Anggraini, Titin; Nazarudin, Nazarudin
Makara Journal of Science Vol. 23, No. 4
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fossil crude reserves continue to decline, eventually leading to a reduced availability of fuel oil in Indonesia. Thus, the use of alternative plant-derived renewable energy sources, such as biodiesel should be considered. However, biodiesel as a fuel alternative has many drawbacks. In this study, biodiesel was cracked using a Ni-ZSM-5 catalyst to improve its quality. This work aimed to synthesize and characterize the Ni-ZSM-5 catalyst obtained from ion-exchange and catalytically crack methyl esters from used cooking oil. Three Ni-metal concentrations (1%, 2%, and 3%) were used for the ion-exchange of ZSM-5. Ni catalysts were then utilized for catalytic cracking at three temperatures (450 ºC, 500 ºC, and 550 ºC). X-ray diffraction and scanning electron microscopy (SEM) analysis showed that the catalyst was in an aggregate form. SEM-energy-dispersive X-ray spectroscopy analysis indicated that Ni was successfully adsorbed by the catalyst. The gravimetry of the catalytically cracked product revealed that the highest oil fraction was obtained using 1% Ni catalyst at 450 ºC. The largest chain obtained with this catalyst was diesel oil (C13-C19) with total 92.96% of covered peak area in the chromatogram/component quantity from gas chromatography.
Pengaruh Campuran Palm Oil Fuel Ash (POFA) terhadap Stabilisasi Tanah Gambut Ditinjau dari Nilai CBR Tanah Dhimas Cakrawisnu; Dila Oktarise Dwina; Ade Nurdin; Oki Alfernando
Jurnal Teknik Sipil Institut Teknologi Padang Vol 9 No 1 (2022): Jurnal Teknik Sipil Institut Teknologi Padang
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (861.268 KB) | DOI: 10.21063/jts.2022.V901.01

Abstract

Provinsi Jambi memiliki lahan gambut terbesar di pulau Sumatera setelah Provinsi Riau dan Sumatera Selatan, sehingga dalam pemanfaatan lahan gambut sering mengalami permasalahan dalam pembangunan kontruksi maupun sarana transportasi karena memiliki sifat fisik dan daya dukung tanah yang rendah untuk memikul beban di atasnya. Salah satu metode untuk meningkatkan nilai daya dukung tanah adalah dengan cara stabilisasi kimiawi. Campuran yang digunakan yaitu Palm Oil Fuel Ash (POFA) hasil dari pembakaran cangkang kelapa sawit yang telah disaring menggunakan saringan lolos No.20 dan tertahan No.30. Kandungan yang terdapat pada POFA dapat menutupi rongga pori pada tanah sehingga dapat meningkatkan nilai daya dukung tanah. Variasi penambahan POFA sebesar 0%, 25%, 30%, 35%, dan 40% terhadap berat tanah kering dengan waktu pemeraman 0 hari dan 7 hari. Penelitian ini bertujuan untuk mengetahui pengaruh dari penambahan POFA dan lamanya waktu pemeraman yang dilakukan. Hasil pengujian tanah gambut yang berada di Desa Tangkit Baru Muaro Jambi termasuk ke dalam tanah yang memiliki daya dukung yang rendah dengan nilai CBR sebesar 2,43%. Nilai CBR tertinggi pada pencampuran POFA diperoleh pada persentase 40% dengan masa pemeraman 7 hari yaitu sebesar 4,14%. Dari hasil tersebut menunjukkan bahwa pada setiap penambahan variasi menunjukkan adanya kenaikan nilai CBR. Kemudian berdasarkan lamanya waktu pemeraman yang dilakukan, maka akan meningkatkan nilai daya dukung tanah.
STABILISASI TANAH GAMBUT MENGGUNAKAN POFA SISA PEMBAKARAN CANGKANG SAWIT DITINJAU DARI NILAI CBR Del Zamre Ikhlas; Dila Oktarise Dwina; Ade Nurdin; Oki Alfernando
Portal: Jurnal Teknik Sipil Vol 14, No 2 (2022): Edisi Oktober
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v14i2.2617

Abstract

penelitian ini membahas pemamfaatan abu limbah pembakaran cangkang sawit (POFA). Variasi penambahan POFA sebesar 0%, 30%, 35%, 40%, 45%, terhadap berat tanah kering dengan waktu pemeraman 0 hari, 7 hari.  Tujuan penelitian ini untuk mengetahui daya dukung tanah dengan penambahan material berupa POFA di tinjau dari nilai CBR. Hasil yang diperoleh dari penelitian ini yaitu tanah gambut asli sebagai tanah dengan kandungan organik yang tinggi termasuk kedalam golongan A-8 menurut sistem AASHTO dan disimbolkan dengan peat berdasarkan sistem USCS. Sampel tanah pada lokasi tangkit baru termasuk tanah yang memiliki daya dukung yang jelek karena memiliki nilai CBR 2,43%. Pada tanah campuran POFA diperoleh nilai CBR yang meningkat pada umur pemeraman 0 dan 7 hari sebesar 2,83%, 3,55% CBR tertinggi didapat pada variasi campuran 45% POFA terhadap tanah kering dengan masa pemeraman 7 hari yaitu sebesar 3,55%.
Analisis Pengaruh Waktu Torefaksi Terhadap Kualitas Biobriket dari Cangkang Kelapa Sawit (Palm Oil Shell) Oki Alfernando; Lince Muis; Siti Junaida; Malem K. Ginting; Muhammad Haviz
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.449

Abstract

Palm oil shells are solid waste from the palm oil processing industry. In 1 ton of palm oil produces 6.5% shell waste. Solid waste can be converted into fuel as a substitute for oil, namely bio-briquettes as an alternative fuel through a combustion process with less air. This study aims to determine the effect of time variations on the quality and yield of bio-briquettes produced using a combined pretreatment method of densification (with additional binder) and torrefaction at a temperature of 275 oC and time variations of 30, 45, 60, 75 and 90 minutes. Torrefaction is a new method in the briquetting process where this method takes place at low temperatures. The results showed that the longer the torrefaction time, in general, the value of water content, ash content, volatile matter content, fixed carbon value and burning time also increased. However, this is inversely proportional to the yield value of the resulting product, so the best quality is obtained in 75 minutes with a moisture content of 0.86%, ash content 2.38%, volatile matter content 18.23%, fixed carbon value 78.51 %, product yield is 36.3165% and calorific value is 5964 Kcal/kg.
Co-Authors AA Sudharmawan, AA Ade Adriadi Ade Nurdin Anggraini, Titin Annisa Rizki Sulardi Fitriani Aris Doyan Del Zamre Ikhlas Desyandri Desyandri Dhimas Cakrawisnu Diah Riski Gusti Dila Oktarise Dwina Dinda Bectari Dyah Kumalasari Enita Pitri Fitri Nor Chasanah Gabriel Adi Pratama Marpaung Intan Lestari Ira Galih Ira Galih Prabasari Jesika Sinaga Josua Sidauruk Kasmiyanti Kasmiyanti Leily Nurul Komariah Lince Muis Lutfia Rahmiyati M Haviz Malem K. Ginting Maulidini Nabila Mela Mauliani Muhammad Haviz Munadi Munadi Nazarudin NM Yuhermita Nur Sri Wahyuningsih Riska Nofia Qona'a Sarah Fiebrina Heraningsih Sarip, Rozie Siti Junaida Susila Arita Susilawati - Syafhira Putri Aulia Tia Nofrina Yogie Yogendra Hans