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CO2 Frost Phenomenon for Binary System of Methane-Carbon Dioxide Mixtures Wibawa, Gede; Mustain, Asalil; Sumarno, Sumarno; Gunawan, Setiyo
Journal of Engineering and Technological Sciences Vol 47, No 6 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.868 KB) | DOI: 10.5614/j.eng.technol.sci.2015.47.6.2

Abstract

In the present study, the CO2 frost phenomenon of CH4-CO2 mixtures has been observed for the rational design of CO2 removal from natural gas using a controlled freeze out area. The CO2 frost conditions were estimated using the ZNE method and process simulation software (Aspen HYSYS® v7.3). The experiment was carried out using a double pipe heat exchanger (DPHE) with the concentration of CO2 in the gas mixture at 5 and 10% and pressure of the gas mixture from 1 to 20 bar. The equilibrium temperature predictions of the ZNE method and the process simulation software only had a slight difference, with a magnitude deviation of less than 1% for pressures below 20 bar and 3% for pressures in the range of 20-30 bar, respectively. In the experimental study, CO2 frost formation was detected at pressures of 1, 5, 10 and 20 bar. The locations of the initial CO2 frost formation were determined using a pressure drop indicator associated with the predicted frost temperatures obtained from the ZNE method and the process simulation software. For all studied variables, the locations of initial CO2 frost formation were found at 0.887-1.531 m from the inlet.
PARAMETER INTERAKSI BINER KESETIMBANGAN UAP-CAIR CAMPURAN ALKOHOL UNTUK OPTIMASI PROSES PEMURNIAN BIOETANOL Mustain, Asalil; Takwanto, Anang; Hartanto, Dhoni
Jurnal Bahan Alam Terbarukan Vol 5, No 2 (2016): December 2016 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v4i2.5126

Abstract

In this work, the binary interaction parameters of vapor-liquid equilibrium for the mixtures of primary alcohols (methanol, ethanol, 1-propanol or 1-butanol) with C5 alcohols were obtained. A total of 15 systems that consisted of isobaric vapor-liquid equilibrium data at atmospheric pressure were selected. The binary interaction parameters were determined as temperature function by correlating the selected vapor-liquid equilibrium data using the Wilson, Non-Random Two-Liquid (NRTL) and Universal Quasi-Chemical (UNIQUAC) activity coeffi­cient models. The binary interaction parameters were described as the temperature-dependent to increase the capability of the parameters for the application in wide range of temperature. The correlation showed good results because the root mean square devia­tion (RMSD) between the calculation values and experimental data were relatively low. The obtained parameters were very useful for optimizing the distillation column in the bio-ethanol purification process.
PARAMETER INTERAKSI BINER KESETIMBANGAN UAP-CAIR CAMPURAN ALKOHOL UNTUK OPTIMASI PROSES PEMURNIAN BIOETANOL Mustain, Asalil; Takwanto, Anang; Hartanto, Dhoni
Jurnal Bahan Alam Terbarukan Vol 5, No 2 (2016): December 2016 [Nationally Accredited]
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v4i2.5126

Abstract

In this work, the binary interaction parameters of vapor-liquid equilibrium for the mixtures of primary alcohols (methanol, ethanol, 1-propanol or 1-butanol) with C5 alcohols were obtained. A total of 15 systems that consisted of isobaric vapor-liquid equilibrium data at atmospheric pressure were selected. The binary interaction parameters were determined as temperature function by correlating the selected vapor-liquid equilibrium data using the Wilson, Non-Random Two-Liquid (NRTL) and Universal Quasi-Chemical (UNIQUAC) activity coeffi­cient models. The binary interaction parameters were described as the temperature-dependent to increase the capability of the parameters for the application in wide range of temperature. The correlation showed good results because the root mean square devia­tion (RMSD) between the calculation values and experimental data were relatively low. The obtained parameters were very useful for optimizing the distillation column in the bio-ethanol purification process.
Isopropyl Alcohol Purification through Extractive Distillation using Glycerol as an Entrainer: Technical Performances Simulation and Design Hartanto, Dhoni; Handayani, Prima Astuti; Sutrisno, Akhmad; Anugrahani, Viona Widya; Mustain, Asalil; Khoiroh, Ianatul
Jurnal Bahan Alam Terbarukan Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v8i2.23477

Abstract

Isopropyl alcohol is widely used as industrial chemical intermediates and common solvents in households, pharmaceuticals, food, cosmetics, and medical purposes. The high purity of isopropyl alcohol requires special separation from its impurity i.e. water due to isopropyl alcohol and water form an azeotropic point, which is difficult to separate using a conventional distillation method. The azeotropic point of this mixture is at isopropyl alcohol mole fraction of 0.68 and temperature of 353.4 K. One of the optimum methods to separate an azeotrope point is through the extractive distillation which use a third component as a solvent. Glycerol is one of the solvents which can be used as a potential entrainer in the extractive distillation. Glycerol is produced in the biodiesel production as a by-product. Moreover, glycerol is an eco-friendly chemical. In this work, the simulation of the extractive distillation of isopropyl alcohol/water system with glycerol as an entrainer was simulated using Aspen Plus. The Non-Random Two-Liquid (NRTL) model was used as thermodynamic model in the simulation.  The effect of stage number, binary feed stage, entrainer feed stage, and reflux ratio to the purity of isopropyl alcohol, and reboiler-condenser duties were examined to achieve the optimum design for the extractive distillation column with less energy requirements. The simulation results showed that the optimum configurations in the extractive distillation column design are at 25 theoretical stages, binary feed stage (BFS) of 20, entrainer feed stage (EFS) of 2, and reflux ratio (RR) of 0.5 to produce isopropyl alcohol with the purity of 99.27%. The design and sizing of the extractive distillation column were also proposed in this work.
Prediction of Ternary Vapor-Liquid Equilibria for Alcohols + Glycerol + Water Systems to Enhance the Quality of Glycerol as Biodiesel Side Product D. Setiawati, Eviana; Mustain, Asalil; Wibawa, Gede
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2015i1.1172

Abstract

Fossil fuels as the primary energy resources around the world cause significant negative effect on atmosphere. Recently, biodiesel, which primarily produced from renewable resources, has received great attention because of its environmental benefits. Higher chain of alcohols, such as butanol, may be used as solvent to produce biodiesel with glycerol as byproduct. In order to enhance the quality of glycerol as biodiesel side product which meets food and pharmaceutical standards, vapor-liquid equilibria (VLE) data for ternary systems consisting of 1-butanol, 2-methyl-1-propanol, glycerol and water are required to design and optimize the separation process of glycerol. In this work, the prediction of ternary VLE for (1-butanol / 2-methyl-1-propanol + glycerol + water) using UNIFAC model were determined at various temperatures and compositions and compared with the experimental data giving Average Absolute Deviations (AAD) less than 5.7%. The results indicated that UNIFAC was a reliable model for phase equilibria predictions in the mixtures containing of glycerol
EVALUASI KINERJA SISTEM CONDENSATE POLISHER PLANT DI PT YTL JAWA TIMUR Rofiah, Niamatur; Mustain, Asalil
DISTILAT: JURNAL TEKNOLOGI SEPARASI Vol 6, No 2 (2020): Distilat: Jurnal Teknologi Separasi
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v6i2.66

Abstract

Condensate Polisher Plant (CPP) merupakan peralatan yang berfungsi untuk menghilangkan atau mengurangi kandungan bahan kimia yang tidak dibutuhkan pada air kondensat. Dalam CPP terdapat resin anion dan kation yang berfungsi untuk menangkap ion pengotor yang tidak diperlukan. Resin yang ada di dalam CPP dapat mengalami kejenuhan, sehingga resin tidak mampu lagi menangkap ion pengotor yang terdapat dalam air kondensat, sehingga regenerasi pada resin diperlukan pada kondisi tersebut. Penelitian ini bertujuan untuk mengetahui kinerja dari sistem CPP dan mengetahui nilai exchange time dan exchange capacity pada saat CPP beroperasi. Performa dari resin dapat diketahui dengan cara mengambil sampel pada saat CPP beroperasi. Pengambilan sampel dari CPP unit 6A kemudian dilakukan analisis. Data hasil analisa yang telah dilakukan pada kandungan air sebelum melewati dan sesudah melewati proses di CPP selanjutnya digunakan untuk menghitung exchange capacity dan exchange time. Exchange capacity dihitung untuk mengetahui seberapa banyak impurities atau senyawa kimia yang dapat ditangkap oleh resin, sedangkan exchange time dihitung untuk mengetahui berapa lama resin dapat melakukan pertukaran ion. Nilai exchange capacity kation unit 6A sebesar 1061,43 eq/jam dan exchange time anion 6A sebesar 6,59 jam sedangkan untuk exchange capacity anion 6,43 eq/hr dan exchange time anion sebesar 544,3 jam. Hasil perhitungan menunjukkan nilai exchange capacity anion lebih besar dari kation, namun pada faktanya waktu yang diperlukan untuk service CPP sesuai dengan exchange time kation, hal tersebut karena kation yang menjadi limiting time pada proses. 
Produksi Biodiesel dari Minyak Jelantah dengan Katalis Heterogen CaO dari Limbah Cangkang Telur Suryandari, Ade Sonya; Ardiansyah, Zainur Risky; Putri, Vemmy Nurmala Andhani; Arfiansyah, Ilham; Mustain, Asalil; Dewajani, Heny; Mufid, Mufid
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol 5, No 1 (2021)
Publisher : Fakultas Teknik, Universitas Brawijaya

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

Abstract

Nowadays, the substitute for biofuel diesel fuel is biodiesel. Waste cooking oil has the potential as a biodiesel feedstock due to its environmentally friendly, inexpensive, reduces household waste and does not compete with food needs. One effort that can be done is to use CaO catalyst from eggshell waste. Eggshells contain 95,28% CaCO3 which can be calcined to produce CaO. In this research, production of biodiesel is done by using waste cooking oil and CaO catalyst from eggshells with various variables to determine the best calcination conditions in the preparation of the catalyst. The eggshells were calcined at variable temperatures (600,700,800 and 900°C) during the time variables (2,3,4 and 5 hours). The operating conditions in the transesterification reaction were at 60°C for 2hours with a stirring speed of 700rpm and a mole ratio of oil and methanol of 1:12. The results obtained, the best calcination conditions in producing CaO catalysts were at a temperature of 800°C for 2 hours with 78,31% mass recovery. In addition, the transesterification reaction using the best catalyst produced 97,2% FAME with a density of 0,8549 gr/mL and a viscosity of 9,58 cSt.
Penurunan Kandungan Polutan pada Lindi dengan Metode Elektrokoagulasi-Adsorbsi Karbon Aktif untuk Memenuhi Standar Baku Mutu Lingkungan Anang Takwanto; Asalil Mustain; Hadi Priya Sudarminto
Jurnal Teknik Kimia dan Lingkungan Vol 2, No 1 (2018): April 2018
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (784.86 KB) | DOI: 10.33795/jtkl.v2i1.37

Abstract

Sampah merupakan suatu masalah yang sering dialami oleh  penduduk di kota-kota besar di Indonesia, dimana dengan semakin bertambahnya jumlah penduduk menyebkan volume sampah menjadi semakin meningkat. Salah satu dampak dari timbunan sampah adalah terbentuknya lindi, dimana lindi yang tidak diolah dengan baik akan menybakan terjadinya pencemaran air tanah.  Penelitian ini bertujuan untuk menurukan kandungan polutan dalam lindi dengan menggunakan metode kombinasi elektrokoagulasi-adsorbsi karbon aktif. Tahapan proses penelitian ini diawali dengan proses elektrogaulasi limbah lindi dengan elektrode besi dan varibabel peubah adalah rapat arus dan kandungan garam pada larutan elektrolitnya, selanjutnya hasil dari proses tersebut di proses lebih lanjut dengan proses adsorbsi menggunakan karbon aktif, parameter yang diuji pada produk adalah nilai TSS, BOD, turbidity, dan pH nya. Hasil penelitian menunjukkan bahwa  proses elektrokoagulasi dapat menurunkan TSS (95% ) dari 24,375 mg/l menjadi 1,875mg/l dan BOD (91,60%) dari 893,25 mg/l menjadi 79,46 mg/l . Sedangkan metode kombinasi elektrokoagulasi dan adsorbsi karbon aktif ini dikatakan sangat efektif untuk mengurangi konsentrasi polutan pada lindi pada rapat arus 1,01 mA/cm2 dan kandungan garam 0,5% dihasilkan penurunan sebesar 77,49% dan setelah melewati proses adsorbsi karbon aktif dihasilkan penurunan sebesar 91,60%.Hasil tersebut sesuai dengan baku mutu lindi yang dsesuai dengan Peraturan Menteri Lingkungan Hidup dan Kehutanan Republik Indonesia No. P.59/Menlhk/Setjen/Kum.1/7/2016Garbage is a problem that is often experienced by residents in big cities in Indonesia, where with the increasing number of residents increasing the volume of waste is increasing. One of the impacts of waste accumulation is the formation of leachate, where leachate that is not treated properly will cause the occurrence of groundwater contamination. This study aims to reduce pollutant content in leachate by using combination method of activated carbon electrocoagulation. Stages of this research process begins with electrogaulation process of leachate waste with iron electrode and variable variables is the current density and salt content in electrolyte solution, then the results of the process in the process further by adsorption process using activated carbon, the parameters tested on the product is the value of TSS, BOD, turbidity and pH. The results showed that electrocoagulation process could decrease TSS (95%) from 24.375 mg / l to 1.875 mg / l and BOD (91.60%) from 893.25 mg / l to 79.46 mg / l. While the combination method of electrocoagulation and adsorption of activated carbon is said to be very effective to reduce the concentration of pollutants in leachate at a current density of 1.01 mA / cm2 and 0.5% salt content produced a decrease of 77.49% and after passing the adsorption process of activated carbon produced a decrease of 91.60%. The results are in accordance with the leachate quality standard that is compatible with the Minister of Environment and Forestry Regulation of the Republic of Indonesia No. P.59 / Menlhk / Setjen / Kum.1 / 7/2016.
Pelatihan Pembuatan Hand Sanitizer untuk Kader Posyandu Kamboja Kelurahan Tasikmadu Kota Malang Wibowo, Agung Ari; Suharti, Profiyanti Hermien; Mustain, Asalil; Putri, Shabrina Adani
AJAD : Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 1 (2022): MAY 2022
Publisher : Research Division Lembaga Mitra Solusi Teknologi Informasi (L-MSTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (468.841 KB) | DOI: 10.35870/ajad.v2i1.24

Abstract

Posyandu Kamboja was established in 1975 in Tasikmadu Village, Lowokwaru District with an active cadre of 15. The activities of the Posyandu Kamboja include Integrated Healthcare Center for Invant and toddler, Family and Toddler Development Program and Early Childhood Education Post. Healthy life counseling is one of the main activities and is generally a priority in the implementation of Posyandu activities. The development program offered by the community service team to overcome partner problems includes training and assistance in making hand sanitizers as a solution to the limited skills of the Posyandu cadres. The results obtained from the implementation of the training are that posyandu cadres can easily understand the material and skills being taught because the delivery method includes the hands-on practice of making hand sanitizers. In general, there were no obstacles in the activities implementation and the team received very satisfactory feedback from the posyandu cadres.