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Wahyu Rinaldi
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Gedung Teknik Kimia UNSYIAH Jl. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh Propinsi Aceh, 23111, INDONESIA
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Jurnal Rekayasa Kimia & Lingkungan
Published by Universitas Syiah Kuala
ISSN : 23561661     EISSN : 14125064     DOI : https://doi.org/10.23955/rkl.v17i2.25520
Core Subject : Science, Engineering,
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 8 Documents
 1 
Search results for , issue "Vol 5, No 1 (2006): Jurnal Rekayasa Kimia " : 8 Documents clear
Pembuatan Membran Komposit Khitosan-Selulosa dari Limbah Kulit Kepala Udang Sri Aprilia
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Khitosan adalah produk yang dapat diasetilasi dari khitin, dan banyak terdapat di alam. Khitin diisolasi dari limbah kulit udang yang merupakan polimer alam yang mempunyai struktur mirip dengan selulosa. Khitosan ini bersifat hidrofilik  dan merupakan material biodegradable. Dengan pesatnya teknologi pemisahan, maka khitosan telah digunakan sebagai bahan pembuat membran. Membran khitosan bersifat hidrofilik yang memiliki kemampuan yang tinggi dalam melewatkan permeat berupa air. Pada penelitian ini khitosan diisolasi dari khitin pada temperatur  120oC dan waktu deasetilasi 120 menit. Kandungan air yang diperoleh adalah 7% dan kandungan abu adalah 1,28%. Membran komposit khitosan dan selulosa dibuat dengan metode inversi fasa dan teknik  polimerisasi antar muka. Hasil peneletian dilakukan karakterisasi membran dengan permeasi pelarut. Fluks besar diperoleh pada membran dengan konsentrasi khitosan terkecil yaitu 0,25%. Koefisien permeabilitas (Lp) terbesar diperoleh pada membran dengan konsentrasi khitosan 0,25%, yaitu sebesar 1,522 l/m2jam bar.
Linear Driving Force Model for Adsorption onto Activated Carbon Monolith Darmadi Darmadi; Thomas S.Y. Choong; T. G. Chuah; Robiah Yunus; Taufiq Y.H. Yap
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

A mathematical model on carbon coated   monolith   using the  linear driving force model is develop. The computer program is writted in MATLAB and simulation using data from [4] for cell density 200 cpsi was used to studies the effect of different variables on breakthrough profiles.  The result showed that the breakthrough curve of the monolith is very sharp. Because of its an open structure and  lower pressure drop,   monolith  is an attractive alternative internals for separation.Keywords:  Adsorption, modeling, simulation, carbon coated monolith, breakthrough
Rapid Determination of Microbial Quinones using Supercritical CO2 Extraction Muhammad Faisal; Irvan Irvan; Yoichi Atsuta; Hiroyuki Daimon; Koichi Fujie
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

The supercritical CO2 extraction of microbial quinones from activated sludge samples obtained from various activated sludge was investigated and compared to the conventional method using organic solvent extraction. The extraction was carried out in a supercritical fluid extraction (SFE) system in the temperature range of 25 to75 oC and the pressure up to 30 MPa. Different extraction conditions, such as the temperature, pressure, extraction time and modifier were employed to maximize the SFE efficiency. Significant amount of microbial quinones (ubiquinones and menaquinones) could be extracted rapidly with supercritical CO2. Results on the value of diversity and dissimilarity suggested that the SFE with supercritical CO2 extraction was a reliable technique for quinones extraction.
Studi Oksidasi Etanol Menjadi Asetaldehida Menggunakan Katalis Molibdenum Oksida Berpenyangga Al2O3, TiO2, dan SiO2 Husni Husin; Fikri Hasfita
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh penyangga Al2O3, SiO2, dan TiO2 pada MoO3 terhadap kinerjanya dalam oksidasi etanol menjadi asealdehida. Katalis disiapkan dengan metode impregnasi dengan kandungan MoO3 of 25% dan 50%. Hasil identifikasi  dengan X-ray Difraction (XRD) menunjukkan bahwa komponen katalis terdiri dari kristal MoO3, TiO2, Al2O3, dan SiO2. Reaksi uji kinerja katalis dilangsungkan dalam reaktor pipa lurus berunggun tetap, beroperasi pada 150-300oC dan tekanan atmosfir. Produk dianalisis menggunakan gas kromatografi GC 8A buatan Shimadzu dengan kolom porapak Q 80/100 mesh. Konversi etanol tertinggi diperoleh 83% menggunakan katalis 50%MoO3/TiO2. Selektivitas asetaldehida tertinggi dihasilkan 96% menggunakan katalis 25%MoO3/SiO2. Yield asetadehida tertinggi dicapai 51% menggunakan katalis 25%MoO3/TiO2.Kata kunci:  katalis MoO3/TiO2, Al2O3, SiO2, impregnasi, oksidasi etanol, asetaldehida
Hydrogen Absorbing Material in Carbonaceous-Metal Hydride Farid Mulana
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

One of the most promising materials for storing hydrogen in solid state would be included in metal-carbon composites. In order to obtain nanocrystalline metal particles encapsulated by crystalline or amorphous carbon, mechanosynthesis of zirconium-carbonaceous composites and alkali metal-carbonaceous composites was performed. For zirconium-carbonaceous composites, only zirconium-carbon black composite absorbed more hydrogen than expected for a mere mixture with the same composition. The higher hydrogen capacity on the zirconium-carbon black composite would be due to some specific sites on the carbonaceous material created during the milling. Another effect of the composite formation was stabilization of zirconium, that is, the composites did not ignite in air. On alkali metal-carbonaceous composites, carbon black has superior effect in composite formation compared with graphite in which some cooperative effect was only detected on alkali metal-carbon black composite. The effect of the carbonaceous composite formation was resistance to air and anti-sticking characteristics to balls and the wall of the vial during the ball milling.
Batch and Continuous Lactic Acid Production from Cassava by Streptococcus bovis Fachrul Razi; S D Yuwono
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Process variables were optimized for the production of lactic acid from cassava by Streptococcus bovis for batch and continuous fermentations. In the batch fermentation, maximum yield 82.5% and maximum lactic acid productivity 2.43 was achieved at 39 oC, pH 5.5 with 50 g/l cassava concentration. In the continuous fermentation maximum productivity lactic acid 1.25 g/l.h was obtained at dilution rate 0.05 /h.
Effect of Inoculum Age, Carbon and Nitrogen Sources on the Production of Lipase by Candida Cylindracea 2031 in Batch Fermentation I. M. Noor; M. Hasan; K. B. Ramachandran
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Production of extracellular lipase by Candida cylindracea DSMZ 2031  was studied in a seven liters batch bioreactor, using palm oil (PO), palmitic acid (PA), lauric acid (LA), olive oil (OO) and cooking oil (CO) as carbon source.   The effect of  carbon and nitrogen sources  were studied by measuring the lipase activity.  The maximum lipase activity was found to be 12.7 kLU on palm oil as carbon source, urea as nitrogen sources and at 36 h inoculum age. This was achieved at a temperature of 30o C, pH of 6.0, agitation speed of 500 rpm and aeration of 1vvm.
Use of Reactive Distillation for Biodiesel Production: A Literature Survey Muhammad Dani Supardan; Satriana Satriana
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Biodiesel has been shown to be the best substitute for fossil-based fuels to its environmental advantages and renewable resource availability. There is a great demand for the commercialization of biodiesel production, which in turn calls for a technically and economically reactor technology. The production of biodiesel in existing batch and continuous-flow processes requires excess alcohol, typically 100%, over the stoichiometric molar requirement in order to drive the chemical reaction to completion. In this study, a novel reactor system using a reactive distillation (RD) technique was discussed for biodiesel production. RD is a chemical unit operation in which chemical reactions and separations occur simultaneously in one unit. It is an effective alternative to the classical combination of reactor and separation units especially when involving reversible or consecutive chemical reactions such as transesterication process in biodiesel production.

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