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Jurnal Rekayasa Kimia & Lingkungan

RKL
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Published by Universitas Syiah Kuala

ISSN : 23561661 EISSN : 14125064 DOI : https://doi.org/10.23955/rkl.v17i2.25520

Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

The Journal of Chemical Engineering and Environment is an open access journal that publishes papers on chemical engineering and environmental engineering. The following topics are included in these sciences: a. Food and biochemical engineering b. Catalytic reaction engineering c. Clean energy technology d. Environmental and safety technology e. Fundamentals of chemical engineering and applied industrial engineering f. Industrial chemical engineering g. Material science engineering h. Process and control engineering i. Polymer and petrochemical technology j. Membrane technology k. Agro-industrial technology l. Separation and purification technology m. Environmental modelling n. Environmental and information sciences o. Water and waste water treatment and management p. Material flow analysis q. Mechanisms of clean development

Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)

Articles 255 Documents

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Comparative Study between ADMS and CFD in Modeling Dust Dispersion from a Blasting Events in Quarry Wahyu Rinaldi; Teuku Mukhriza
Jurnal Rekayasa Kimia & Lingkungan Vol 8, No 2 (2011): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.072 KB)

Two frequently used methods in atmospheric dispersion modeling (ADMS and CFD) were compared in this study to predict pit retention within an open quarry. Conventional Gaussian plume models developed by CERC, ADMS 3 and ADMS 4, were used to predict the pit retention. This study mimicked Fluent CFD modeling of dust dispersion of a blasting event in Old Moor Quarry. A single blast event that liberated a typical 25,000 tons of rock released 1,900 kg of Total Suspended Particle (TSP). The emission source geometry was defined as a three dimensional block volume source of 70 m normal to the face, 80 m in width and 20 m in height. It was also assumed the TSP liberated over one hour had an emission rate of 4.71x10-3 g/m3/s. The four particle sizes were defined as 2.5, 10, 30 and 75 m at mass fractions of 0.05, 0.45, 0.3 and 0.2 respectively and the particles were assumed have uniform limestone density of 2600 kg/m3. The results indicated that ADMS and model based on CFD indicates similar trend, that is, pit retention is proportional to distance from source to pit edge along wind direction and proportional to inverse quarry gradient.Keywords: dust dispersion, blasting, ADMS, CFD, pit retention

Removal of Fe (II) ions from Aqueous solution using Rice-husk Adsorbents in fixed-bed column Cut Meurah Rosnelly; Lia Meiriza - Meiriza; Husni - Husin; Muhammad - Zaki; Muhammad Aqilussalim E; Syariful - Maliki; Nurul - Aflah; Zeinhom M El-Bahy
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 2 (2021): Jurnal Rekayasa Kimia & Lingkungan (December, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Rice husk has been converted into activated carbon for the adsorbent to remove the heavy metal from the aqueous solution. This study aimed to convert rice husk to activated carbon (AC) for use in the adsorption of Fe ions in a fixed-bed column. Rice husk was first pyrolyzed in an atmosphere of nitrogen gas at 400 oC, then a chemical activation method using sodium hydroxide. The rice husk activated carbon (RH-AC) was characterized using Fourier transform infrared (FTIR) and Scanning electron microscope (SEM) to identify the functional group and microstructure of carbon. The performance of the carbon was tested on the Fe removal from an aqueous solution in a continuous column. The adsorption process was carried out using Fe solution with an initial concentration of 3 mg/L as an artificial sample. The amount of carbon is 25, and 50 g were filled in an adsorber column with a diameter of 5.4 cm and height of 40 cm. SEM images revealed that the activated carbons shown with well-developed pore sizes and pore structure were produced after the chemical activation. The FTIR absorption bands observed in the RH-AC sample confirmed the presence of hydroxyl (-OH), carbonyl, and carboxylic (-COOH) groups of RH-AC adsorbent. The highest Fe removal efficiencies were 91.9% on chemically activated carbon and column mass 50 g at 400 minutes. The overall study revealed the potential value of chemically activated RH-AC as a possible commercial adsorbent in a continuous column wastewater treatment strategy.

Pengaruh Penambahan Epiklorohidrin Terhadap Sifat Mekanik dan Daya Serap Film Khitosan Sebagai Adsorben Nisfayati Juir; Rahmi Rahmi; Marlina Marlina
Jurnal Rekayasa Kimia & Lingkungan Vol 12, No 1 (2017): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Pembuatan film khitosan berikatan silang epiklorohidrin telah dilakukan dengan metode inversi fasa. Pada penelitian ini khitosan dimodifikasi dengan epiklorohidrin untuk memperbaiki sifat mekanik dan ketahanannya terhadap asam. Film khitosan hasil modifikasi diuji sifat mekaniknya dengan alat uji tarik dan daya serapnya diuji terhadap ion Cd2+. Hasil uji tarik menunjukkan bahwa dengan adanya pembentuk ikat silang epiklorohidrin pada khitosan dapat meningkatkan tensile strength film khitosan dan optimum pada komposisi 54,128 % b/b. Hasil uji adsorpsi terhadap ion Cd2+ menunjukkan bahwa penambahan epiklorohidrin dapat meningkatkan kapasitas penyerapan ion Cd2+ sebesar 31,33 % dibandingkan dengan film khitosan tanpa silang. Preparation of epichlorohydrin crosslinked chitosan film has been done by phase inversion method. In this study, chitosan was modified with epichlorohydrin by the purpose of improving its mechanical properties and adsorption capasity. Mechanical properties of crosslinked chitosan film was examined by tensile test. Adsorption study was done for Cd2+ ions removal. Tensile test results showed epichlorohydrin as crosslinking agent of chitosan can improve tensile strength and optimum at 54.128 % w/w of composition. The adsorption results for Cd2+ ions showed the addition of epichlorohydrin in chitosan can increase the adsorption capacity of Cd2+ ions 31,33 % compared with non-crosslinked chitosan films.

Pengaruh Penambahan Jamur Pelapuk Putih (White Rot Fungi) pada Proses Pengomposan Tandan Kosong Kelapa Sawit Nasrul Nasrul; Teuku Maimun
Jurnal Rekayasa Kimia & Lingkungan Vol 7, No 4 (2010): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.892 KB)

Composting is nowadays a general treatment method for agriculture waste such as empty fruit bunch. This research article reported the composting process of the empty fruit bunches. The effect of addition of white rot fungi (Phanerochaete Chrysosporium) as an activator on composting product was studied. Experiment results indicated that white rot fungi is a good activator to improve degradation process of the empty fruit bunch become an organic fertilizer. White rot fungi has capable to increase composting period become shorter in compare with original composting without addition of white rot fungi. The organic fertilizer product as regulation issued by the Standar Nasional Indonesia (NSI) can be achieved in duration of 3 months, while for original process without addition of white rot fungi longer degradation time is necessary.Keyword: Composting, empty fruit bunch, white rot fungi

Selective Reduction of High Alumina-Lateritic Nickel Ore (0.5 Ni-44Fe-16Al2O3) Fajar Nurjaman; Wahyuningsih Wahyuningsih; Pulung Karo Karo; Ediman Ginting; Achmad Shofi; Anton Sapto Handoko
Jurnal Rekayasa Kimia & Lingkungan Vol 14, No 2 (2019): Jurnal Rekayasa Kimia & Lingkungan (December, 2019)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

In this present study, the effect of reductant dosage, temperature and holding time on selective reduction process of high alumina-lateritic nickel ore have been investigated clearly. The lateritic nickel ore was reduced with 5 until 15 wt. % anthracite and 10 wt. % sodium sulfate at reduction temperature of 950ºC, 1050ºC and 1150°C for 60, 90, and 120 minutes. Magnetic separation process was then conducted to separate the concentrate and tailing. The analysis of reduced nickel ore is performed by the Atomic Absorption Spectroscopy, X-Ray Diffraction, and Secondary Electron Microscopy. The optimal process resulted from the reduction of nickel ore with 10 wt. % anthracite at the temperature of 1050°C for 120 minutes which resulted in 0.84% nickel in concentrate. The troilite was not found in reduced ore. The iron grade increased along the increased of reduction temperature. The longer of holding time in selective reduction process increased the nickel grade but it decreased the iron grade.

Pengaruh Nozzle Terhadap Aspek Hidrodinamika Kinerja Kolom Gelembung Pancaran Didiek Hari Nugroho; Adisalamun Adisalamun; Izarul Machdar
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 2 (2014): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Kolom gelembung pancaran merupakan salah satu alat perpindahan massa antara fasa gas dan cair. Penelitian ini bermaksud untuk mempelajari pengaruh nozzle terhadap aspek hidrodinamika antara lain: kedalaman penetrasi gelembung (Z), holdup gas (eg), dan laju alir volumetrik gas entrainment (Ql) yang terjadi dalam kolom gelembung pancaran. Variabel proses yang dipelajari antara lain laju alir volumetrik cairan (10-50 L/menit), ukuran diameter nozzle (0,008-0,0127 m), dan tinggi nozzle (0,125-0,25 m). Hasil penelitian memperlihatkan bahwa ukuran diameter nozzle semakin kecil dan laju alir volumetrik cairan yang semakin besar menghasikan laju alir volumetrik gas entrainment, holdup gas, dan kedalaman penetrasi gelembung yang semakin besar.

Electrochemical Performance of Tellurium Oxide on TiO2/Ti Array for Photoelectrocatalytic Chemical Oxygen Demand Sensor Applications Maulidiyah Maulidiyah; Irwan Irwan; Annisa Indriani; La Ode Agus Salim; Zul Arham; Catherina M. Bijang; Kurniawan Kurniawan; Muhammad Nurdin
Jurnal Rekayasa Kimia & Lingkungan Vol 17, No 2 (2022): Jurnal Rekayasa Kimia & Lingkungan (July - December, 2022)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

The experiments were carried out using Te-TiO2/Ti as working electrodes, prepared by the simple anodization technique and dip coating method, on Ti substrates (TiO2/Ti). The measurements were performed in an electrochemical cell using a three-electrode system, with Te-TiO2/Ti as the working electrode, Ag/AgCl as the reference electrode and pt as the auxiliary electrode. A flow system for determining the profile and photocurrent response of reactive orange 84 was developed using Linear Sweep Voltammetry (LSV) and Multi-Pulse Amperometry (MPA). The physicochemical properties of Te-TiO2/Ti electrodes have been studied using UV–vis DRS analysis techniques and compared with un-doped TiO2/Ti electrodes. The UV–vis DRS showed that the TiO2/Ti doped Te functionally decreases bandgap to 3.0 eV. The results showed that the photocurrent of reactive orange 84 was observed in the concentration range (1-5 μM), with a linear response between concentration and charge.

Pemanfaatan Limbah Serat Sagu (Metroxylon sago) Sebagai Adsorben Iodin Rahmi Rahmi; Suaedi Fachruddin; Nurmalasari Nurmalasari
Jurnal Rekayasa Kimia & Lingkungan Vol 13, No 1 (2018): Jurnal Rekayasa Kimia & Lingkungan (June, 2018)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Adsorpsi terhadap zat iodin menggunakan karbon aktif dari limbah serat sagu (Metroxylon sago), dilakukan untuk mengetahui massa dan waktu kontak optimum yang dibutuhkan oleh karbon aktif untuk menyerap zat iodin. Karbon aktif yang digunakan adalah karbon yang telah diaktivasi dengan H3PO4 3% pada suhu 300 ºC, kemudian dianalisis menggunakan Surface Area Analyzer (SAA) dan diperoleh luas permukaan 101,296 m2/g. Penelitian ini menggunakan variasi massa adsorben 0,05 gram; 0,1 gram; 0,3 gram; 0,5 gram; dan 0,8 gram dengan waktu adsorpsi selama 15 menit dan variasi waktu kontak 0 menit, 5 menit, 10 menit, 20 menit, 30 menit, 50 menit, dan 60 menit. Hasil penelitian diperoleh massa optimum dicapai pada berat adsorben 0,1 gram dengan daya serap terhadap iodin sebesar 301,459 mg/g dan waktu optimum diperoleh pada waktu kontak 30 menit dengan daya serap terhadap iodin 333,192 mg/g. Disimpulkan bahwa karbon aktif dari limbah serat sagu mampu menyerap zat iodin secara signifikan dan mekanisme proses adsorpsi karbon aktif limbah serat sagu terhadap zat iodin cenderung mengikuti kedua persamaan linier Langmuir dan Freundlich.

Penggunaan Microsoft Excel dalam Memprediksi Aliran Fluida dalam Packed Bed Hidayati Hidayati; Muhammad Dani Supardan
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 2 (2012): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (682.234 KB)

Flow distribution is often a problem in the operation of the packed bed reactor. The problem is often referred as flow maldistribution and formation of localized hot spot region. This research is generally aimed to predict fluid flow distribution in the packed bed containing porous media by finite difference method using the software MS. Excel. Model verification result shows conformity between analytic method and result of calculation. Simple study of the finite difference method using the software MS. Excel can describe the fluid velocity profile in a packed bed containing porous media. This profile is similar with experiment of Kufner and Hofmann (1990) and Stephenson and Stewart (1986). The simulation was performed to determine the effect of process variables on the fluid flow velocity profile. Particle diameter influences fluid flow velocity. Bulk porosity also influences fluid flow velocity at axis up to certain distance from wall of reactor. Keywords: finite difference method, flow distribution, packed bed reactor

Steady-State and Dynamic Simulation Study of Reactive Distillation for FFA Esterification in Biodiesel Synthesis Ratna Dewi Kusumaningtyas; Haniif Prasetiawan; Daniel Setiyo Nugroho; Ajeng Riswanti Wulandari; Istadi Istadi; Anwaruddin Hisyam
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 1 (2021): Jurnal Rekayasa Kimia & Lingkungan (June, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Reactive distillation (RD) holds promise for process intensification in biodiesel production since it integrates reaction and separation. It simplifies the process and enhances the conversion of the equilibrium limited reactions. To ensure the stability in RD operation, sensitivity study and process control simulation are necessary. In this work, RD was employed for free fatty acid (FFA) esterification of mixed non edible oils in biodiesel synthesis. Non edible oils used were waste cooking oil, crude jatropha oil, and crude nyamplung oil (Calophyllum inophyllum L). Simulation was conducted using ASPEN Plus V8.8. Sensitivity study was carried out to determine the effects of the operating condition alteration. A dynamic simulation was performed as a Proportional-Integral-Derivative (PID) controller tuning. It was revealed that the highest FFA conversion was 85%, achieved at the feed stage of 7, distillate rate of 0.22 kmol/hr, and oil to methanol molar ratio of 1:5. Level, pressure and temperature controls were installed in RD. Then, a dynamic simulation was applied as a PID controller tuning. Three different controller tuning methods, viz. Ziegler-Nichols, Cohen-Coon, and Internal Model Control, were studied. The best PID parameter was obtained by using Cohen-Coon method which provided fastest rise time, lowest settling time and lowest overshoot.

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Home Page

OAI Link

Editorial Team

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Contact Name Wahyu Rinaldi

Contact Email wahyu.rinaldi@unsyiah.ac.id

Phone +6281360927917

Journal Mail Official rkl@che.unsyiah.ac.id

Editorial Address Gedung Teknik Kimia UNSYIAH Jl. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh Propinsi Aceh, 23111, INDONESIA

Location Kab. aceh besar, Aceh INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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Abstract

Contact Name
Wahyu Rinaldi

Contact Email
wahyu.rinaldi@unsyiah.ac.id

Phone
+6281360927917

Journal Mail Official
rkl@che.unsyiah.ac.id

Editorial Address
Gedung Teknik Kimia UNSYIAH Jl. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh Propinsi Aceh, 23111, INDONESIA

Location
Kab. aceh besar,

Aceh

INDONESIA