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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of Engineering and Technological Sciences Journal of Bioprocess Chemical and Environmental Engineering Science Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Jurnal Offshore: Oil, Production Facilities, and Renewable Energy Jurnal Rekayasa Kimia & Lingkungan
Zuchra Helwani, Zuchra
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Pembuatan Na2O/Serbuk Besi Sebagai Katalis Pada Proses Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Hanafi, Muhammad Rifter; Helwani, Zuchra; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Heterogeneous solid base catalyst synthesized with iron powder to load sodium oxide through impregnation and calcination method. The optimum conditions for the manufacture of catalysts investigated. Effect of weight ratio of Na2O to iron powder and calcination temperature on the catalytic performance were studied. The catalyst with the highest activity is obtained when the weight ratio of Na2O to iron powder is 70:30 and calcination temperature of 550 °C under transesterification reaction conditions of a molar ratio of methanol : oil 8:1, catalyst dosage of 2% by weight, temperature of 60 °C for 3 hours with biodiesel results reached 86.40%.Keywords : biodiesel, calcination, catalysts, impregnation, iron powder, sodium oxide, transesterification.
Bahan Bakar Padat Dari Pelepah Sawit Menggunakan Proses Torefaksi; Variasi Suhu Dan Ukuran Bahan Baku Susilowati, Susilowati; Helwani, Zuchra; Komalasari, Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Oil Palm Frond can be used as alternative energy source by using torrefaction process. Torrefaction is a pre-treatment process of biomass into solid fuel within temperature range of 200-300oC in an inert condition. This research aims to produce solid fuel from oil palm frond and study the effect of process variabel towards characteristic of solid fuel resulted. Torrefaction of empty fruit bunch was using fixed bed horizontal reactor with temperature (250-300oC) and particle size (5-15 mm). Product quality resulted was calorific value, mass yield, energy yield and proximate (moisture content, ash content, volatile content and fixed carbon). The result obtained for calorific value in range was 19513.82-22684.77 kJ/kg, mass yield was 47.93-71.64 %, and energy yield was 65.09-86.39 %. 17091.03-20697.13 kJ/kg, mass yield was 52.63-84.52% and energy yield was 64.12-99.05%. Proximate analysis resulted in the form of moisture content was 1.81-3.25 %, ash content was 4.54-6.13 %, volatile content was 40.95-63.48 %, and fixed carbon was 28.62-51.53. from the result obtained, the effect of rising temperature give enhancement to the calorific value, energy yield, ash content, and fixed carbon. While the influence of increasing particle size give enhancement to the mass yield, calorific value, moisture and volatiles content. From the result of hypothesis testing using F test showed that Fcalculated was greater than Ftable. This indicates that the data obtained significant influence and according to the resulting model.Keywords: biomass, oil palm frond, solid fuel, torrefaction.
Sintesis Katalis Basa Padat Nanomagnetik CaO/Serbuk Besi Untuk Reaksi Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Hafiz, Fadlillahi; Helwani, Zuchra; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Nanomagnetic solid base catalyst synthesized with iron powder nanoparticle to load calcium oxide through impregnation method. The optimum conditions for the manufacture of catalysts investigated. Effect of weight ratio of CaO to iron powder and calcination temperature on the catalytic performance were studied. The catalyst with the highest activity is obtained when the weight ratio of CaO to iron powder is 80:20 and calcination temperature of 850 °C under transesterification reaction conditions of a molar ratio of methanol/oil 10:1, catalyst dosage of 1% by weight, temperature of 70 °C for 2 hours with biodiesel results reached 81.32%. CaO, Fe2O3 and Ca(OH)2 material was found in the catalyst through x-ray diffraction with a catalyst alkalinity values of H_ > 9.3 through alkalinity analysis using hammet indicator phenolphthalein and specific surface area of catalyst is 1.963 m2/g through Brunauer-Emmett-Teller (BET) analysis.Keywords: biodiesel, calcination, calcium oxide, catalysts, impregnation, iron powder, transesterification.
Pembuatan Briket Pelepah Sawit Menggunakan Proses Torefaksi Pada Variasi Tekanan Dan Penambahan Perekat Tapioka Pratama, Yudistira; Helwani, Zuchra; Komalasari, Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Palm frond so far only used as a source of raw materials for animal feed, compost and organic fertilizer in the plantation. Palm frond has a calorific value of 15184.05 kJ/kg with a density of 0.1383 g/cm3. The calorific value can be increased by densification. Dencification is one method to increase the density of the biomass so that it will increase the calorific value of the biomass. The purpose of this research is to produce solid fuel products from palm fronds uses densification process, to determine the characteristics of the product and determine the effect of tapioca adhesive composition and pressure in the process of densification in density, calorific value and proximate. Tapioca adhesive composition used were10, 20, 30 %. Pressure used were50, 75 and 100 bar. The particle size used were < 20 Mesh . The highest density and calorific value of the product is 1.1375gr/cm3and 5144,94cal/gr was obtained at tapioca adhesive composition 30% and pressure 100 bar.Keywords :Densification, Density, Tapioca Adhesive, Pressure, Palm Fronds.
Modifikasi Kulit Telur Ayam Dan Fly Ash Sebagai Katalis Untuk Reaksi Transesterifkasi Minyak Sawit Off Grade Menjadi Biodiesel Putra, Yogi Lesmana; Helwani, Zuchra; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Eggshells modificated of solid base catalyst through calcination, hydration, dehydration methods with fly ash through impregnation method to load calcium oxide with eggshells as precursor. Effect of dehydration temperature and time on the catalytic performance were studied. The catalyst with the highest activity is obtained when the dehydration temperature of 600 °C and the dehydration time of 3 hours with transesterification reaction conditions of a molar ratio of methanol/oil 6:1, catalyst dosage of 6% by weight, temperature of 70 °C for 2 hours with yield biodiesel results reached 84,32%.Keywords: biodiesel, calcination, calcium oxide, catalysts, dehydration, fly ash, hydration, impregnation, transesterification.
PEMBUATAN BAHAN BAKAR PADAT DARI PELEPAH SAWIT DENGAN TAPIOKA SEBAGAI FILLER MELALUI PROSES DENSIFIKASI Nasution, Muhammad Hatta; Helwani, Zuchra; Komalasari, Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Palm frond only used as a source of raw materials for animal feed, compost and organic fertilizer in the plantation. Palm frond has a calorific value of 15,18 MJ/kg with a density of 0.138 g/cm3. The calorific value can be increased by densification. Densification is one method to increase the density of the biomass so that it will increase the calorific value of the biomass. The purpose of this research is to produce solid fuel products from palm fronds uses densification process, to determine the characteristics of the product and determine the effect of tapioca filler composition and pressure at densification for density, calorific value and proximate. The composition of tapioca filler used were 5, 10 15 and 20%. Pressure used were 50, 75 and 100 bar. The particle size used were less than 20 mesh. The highest density of the product is 0.858 gr/cm3 was obtained at tapioca filler composition 20% and pressure 100 bar. The highest calorific value of the product is 16,16 MJ/kg was obtained at tapioca filler composition 15% filler and pressure 75 bar. Variations of filler composition and pressure give a significant effect the density of the product.Keywords : Densification, Density, Filler, Pressure, Palm Fronds.
Kesetimbangan Adsorpsi Zat Pewarna Rhodamine-B Menggunakan Fly Ash Sawit Sebagai Low-Cost Adsorbent Olsy, Fradilla; Saputra, Edy; Helwani, Zuchra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Rhodamine B is one of the various toxic dye that contributes significantly to environmental pollution, because it is non-biodegradable, toxic and harmful to the environment. One effort to reduce the amount of rhodamine b is the adsorption process. One of the good adsorbent that can be use for adsorbtion process is palm oil fly ash. The purpose of this study to aim the effect of adsorption temperature, pH, and adsorbent mass. Knowing the optimum conditions for reducing the levels of dye in the water, as well as determine the adsorption equilibrium models rhodamine b using fly ash oil modified with 0,1M HCl as an adsorbent. Fly ash modification processes are done by mixing fly ash and HCl in the ratio 1:10 of 0,M HCl solution. The adsorption process is conducted by mixing fly ash 0.5; 1; 1,5 and 2g/L and pH solution of rhodamine b 2; 4; 6; 8 with temperature of 30; 35; 45oC and with various of rhodamine b’s initial solution 10, 20, 30 dan 40ppm. The optimum conditions for reducing the levels of rhodamine B in water is the adsorbent mass of 2g/L, temperature of 45°C and pH 8 at 10ppm concentration rhodamnine’s solution. Thermodynamic data such as ΔH, ΔG and ΔS were calculated. And the mechanism of rhodamine B dye adsorption by fly ash oil is suit well with Freundlich and Langmuir isotherm models.Keyword: Adsorption, Isothermal Adsorption, Palm Oil Fly ash, Rhodamine B,
Pembuatan Na2O/Fly Ash sebagai Katalis Pada Proses Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Surya, Andry Pratama; Helwani, Zuchra; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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A fly ash supported sodium oxide (Na2O) catalyst used in transesterification reaction of off-grade palm oil for biodiesel production. The catalyst synthesized by loading Na2O from sodium nitrate (NaNO3) into fly ash micro pore through impregnation method. The optimum catalyst preparation conditions were determined by influence of calcination temperature and weight ratio of NaNO3/fly ash. Catalyst with highest catalytic activity was achieved when calcined at 550oC and proportion of NaNO3/fly ash is 90:10. Under the conditions of oil : methanol ratio of 1:8, catalyst dosage of 4 wt% and temperature of 60oC for 3 h, the biodiesel yield reaches to 89,12%. Na2O, SiO2, NaNO3 and Na2O2 were found in the catalyst through X-ray diffraction (XRD) while the basic strength of the catalyst H_ > 9,3 was determined by using Hammett indicator phenolphthalein. Surface area of the developed catalyst is 21,651 m2/g through Brunauer-Emmett-Teller (BET). Characteristics of biodiesel such as density, kinematic viscosity, acid value, flash point has been matched with standard for biodiesel specification of Indonesia.Keywords: biodiesel, sodium oxide, catalyst, fly ash, impregnation, calcination, transesterification.
Pemanfaatan Gliserol Dari Produk Samping Biodiesel Menjadi Triacetin Melalui Proses Esterifikasi Menggunakan Katalis Zeolit Alam Rizki, Juliana; Helwani, Zuchra; Rionaldo, Hari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Glycerol by-product of biodiesel through transesterification reaction is currently not fully utilized as raw materials or as chemical products. Crude glycerol can be purified to be processed into more useful products. Through conversion into triacetin with the esterification process using acetic acid and solid catalyst in the form of natural zeolite. Triacetin can be used for food and non-food. The objective of this study was to study the effect of catalyst loading natural zeolite and temperature on glycerol conversion on triacetin production process. The experiments were carried in batch process with time of reaction 4 hours were optimum for glycerol conversion, the molar ratio of glycerol to acetic acid 1 : 7 and size of catalyst -100 mesh and +150 mesh with variation of reaction temperature (90, 100, and 110 oC) and catalyst concentration (1%, 3%, and 5%-w). The results of the qualitative analysis by means of Fourier Transform Infrared Spectroscopy confirmed there is triacetin as product. Increasing of temperature reaction increased of glycerol conversion. But increasing of catalyst loading not increased of glycerol conversion. The glycerol conversion was 96,49%, where obtained using the reaction condition: temperature 110 oC and catalyst of natural zeolite was 3% (w/w) acetic acid based. Keywords: glycerol, esterification, zeolites, triacetin
Sintesis Fly Ash Yang Diimpregnasi Dengan Na2O Sebagai Katalis Pada Proses Transesterifikasi Minyak Sawit Off-Grade Menjadi Biodiesel S, Prasetyo Arva; Helwani, Zuchra; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Biodiesel is one of renewable energy in Indonesia that have to be development. Biodiesel formed as liquid fuel and has same property with petrodiesel. Biodiesel can be synthesized from off-grade palm oil using Na2O/fly ash as catalyst in transesterification process. Employing fly ash as support in Na2O has a good impact due to provide wide surface of catalyst. In this study aims to see the influence of reaction temperature, molar ratio of methanol and oil and concentration of Na2O/fly ash towards biodiesel yield. The process was conducted through reaction of esterification and followed by transesterification reaction. Processing of the data in this study was conducted by response surface methodology (RSM) using Design Expert 7.0 program which is experimental design determined by central composite design (CCD) which consists of three variables. The highest result of biodiesel yield was 81,2% at 60oC reaction temperature, molar ratio of methanol : oil 8 : 1 and catalyst concentration of Na2O/fly ash 4%-wt. Biodiesel characteristics such as density, kinematic viscosity, acid value and flash point has been appropriate by Indonesian biodiesel standard. The most significant condition of process affecting the yield of biodiesel was catalyst concentration.Keywords : biodiesel, catalyst, fly ash, off-grade palm oil, transesterification
Co-Authors Agustiyanti, Rini Dwi Ahmad Fadli Amun Amri Anggraini, Diva Putri Aswie, Viqha Bahruddin Bahruddin Bahruddin Damayanti, Elok David Andrio Dhani Nur Miftahudin Dizikri, Dizikri Drastinawati Drastinawati Edy Saputra Febrina Dwi Putri Hafiz, Fadlillahi Hanafi, Muhammad Rifter Hari Rionaldo Hari Rionaldo Hawa, Karfika Ainil Hutagaol, Martiandes Ida Zahrina Idral Amri Karfika Ainil Hawa Karina Octaria Putri Kesni Savitri Komalasari Komalasari Komang, Hendri Lukman Arifin Miftahudin, Dhani Nur Muhammad Mardhiansyah Muhammad Zen, Muhammad Mulya, Dynna Ardilla Putri Nasution, Muhammad Hatta Olsy, Fradilla Prasetyo Arva S, Prasetyo Arva Pratama, Teddy Pratama, Yudistira Putra Zelly Nugraha, Putra Zelly Putra, Bayu Eldino Putra, Yogi Lesmana Putri, Karina Octaria Qalbi, Tiffani Rafi, M Khaidiz Rahayu, Ricky Puji Raja Heru Nur Alam Ichsan, Raja Heru Nur Alam Randi Sanjaya Randi Sanjaya, Randi Reno Susanto Reski, M. Rizki, Juliana Rozanna Sri Irianty Said Zul Amraini Saparullah, Zulkarnaen Setiadi, Fydel Simbolon, Kristin Madelin Sitorus, Mesakh Fridolin Sugesti, Heni Surya, Andry Pratama Susilowati Susilowati Syahputra, Dede SYAIFUL BAHRI Tengku Mukhlis Topan Herianto Ulima, Riris Warman Fatra Warman Fatra Warman Fatra, Warman Wenny Susanty Yelmida Azis Yemita, Sylvia Yudha, Ricky Satria Z Zulfansyah Zultiniar, Zultiniar