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All Journal Majalah Forum Teknik UGM Reaktor International Journal of Renewable Energy Development Jurnal Teknik ITS Jurnal Sains dan Seni ITS IPTEK The Journal of Engineering IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal Teknik Kimia Eksergi Bulletin of Chemical Reaction Engineering & Catalysis Journal of Research and Technology Indonesian Journal of Chemistry Jurnal Purifikasi ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia Lembaran Publikasi Minyak dan Gas Bumi Jurnal Rekayasa Kimia & Lingkungan Sewagati Petrogas : Journal of Energy and Technology Bulletin of Chemical Reaction Engineering & Catalysis Journal of Fundamentals and Applications of Chemical Engineering
Ali Altway
Chemical Engineering Department, Institute Technology Of Sepuluh Nopember, Surabaya,
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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ANALISA TRANSFER MASSA DISERTAI REAKSI KIMIA PADA Kusnaryo, Radya Purna Wijaya, Ali Altway,
Jurnal Teknik Kimia Vol 6, No 1 (2011): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v6i1.85

Abstract

The aim of this research is to study mass transfer in CO2 absorptions a packed column for nonisothermal reversible reactions. The study was developed experimental and simulation co2 with air andpotassium carbonate solution is the matter used in this research.The arrangement counter current packed column to which a CO2 – air mixture flow is feed from the bottomand potassium carbon from the top of column.The work of simulation developed with microscopic mass and energy balance in column.The effect of flow absorbent and K2CO3 concentration is study do to percent CO2 removal. The results is;in range flow 3-5 l/mm have 10 % diviasi and range flow : 5-7 l/mnt was have deviasi in range 10-30 %Key words :mass transfer, absorption, non-isothermal, packed column
ANALISA TRANSFER MASSA DISERTAI REAKSI KIMIA PADA ABSORPSI CO2 Kusnaryo, Radya Purna Wijaya, Ali Altway,
Jurnal Teknik Kimia Vol 2, No 2 (2008): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v2i2.94

Abstract

The aim of this research is to study mass transfer in CO2 absorptions a packed column for nonisothermal reversible reactions. The study was developed experimental and simulation co2 with air andpotassium carbonate solution is the matter used in this research.The arrangement counter current packed column to which a CO2 – air mixture flow is feed from the bottomand potassium carbon from the top of column.The work of simulation developed with microscopic mass and energy balance in column.The effect of flow absorbent and K2CO3 concentration is study do to percent CO2 removal. The results is;in range flow 3-5 l/mm have 10 % diviasi and range flow : 5-7 l/mnt was have deviasi in range 10-30 %Key words :mass transfer, absorption, non-isothermal, packed column
PENGARUH POROSITAS PACKING STEEL WOOL TERHADAP PRESSURE DROP DIDALAM PACKED BED COLUMN PADA DISTILASI CAMPURAN ETANOL-AMIL-ALKOHOL-AIR Dhaniswara, Trisna Kumala; Widjaja, Tri; Altway, Ali
Journal of Research and Technology Vol 2, No 1 (2016)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.652 KB) | DOI: 10.5281/zenodo.2582225

Abstract

Inventories of petroleum fuels are increasingly depleted and will someday run out. These shortcomings can be overcome by using alternative fuels, such as ethanol. Based on this, it is necessary to research and development of ethanol as a fuel. One way is with a separation in a packed distillation column. This study aims to assess the mass transfer phenomena that occur in the process of distilling a mixture of ethanol-water-amyl alcohol packed in column. In addition, this study aims to optimize temperature and reflux to obtain the highest levels of ethanol. This research method uses packed bed distillation system with the batch process. Feed used is synthetic ethanol, water, and solvent. Solvent used were amyl alcohol. Doing distillation with heating temperature is maintained. Distillation is done in the packing of stainless steel wool. Research carried out in a batch process with a variable temperature of  79°C; 84°C; 91°C; and porosity packing 20%; 30%; 40%; 50%; 60%; 70%; 80%.
STUDI EKSPERIMENTAL FALLING FILM EVAPORATOR PADA EVAPORASI NIRA KENTAL Fitri, Medya Ayunda; Suhadi, Suhadi; Altway, Ali; Susianto, Susianto
Journal of Research and Technology Vol 2, No 1 (2016)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.175 KB) | DOI: 10.5281/zenodo.2582030

Abstract

Falling film evaporator is a constructed equipment for concentrating dilute solution that are sensitive to heat flowing form a thin film. This research aims to study the evaporation of cane juice concentrated with air flow on falling film evaporator and knowing evaporation rate occured in falling film evaporator used. In the process, cane juice from plant pumped to the falling film evaporator that used in this experiment. This research used concentrated cane juice and air flow rate for variables of this experiment. Cane juice flow from top of evaporator through distributor to form thin film and air flow from the bottom of evaporator. After that, temperatur of pipe wall, inlet and outlet temperature of cane juice and air were measured. This experiment concluded that the highest concentration of outlet solution is 59 brix for liquid flow rate 154 l/h and air flow rate 10 m3/h, and the other hand inlet solution concentration 51 brix. Optimum evaporation rate is 35 kg/m2.h for 51 brix and air flow rate 10 m3/h.
PENGARUH KONSENTRASI SURFAKTAN DAN KECEPATAN PUTAR PENGADUK TERHADAP PROSES PEMISAHAN BITUMEN DARI ASBUTON Novitrie, Nora Amelia; Susianto, Susianto; Altway, Ali
Journal of Research and Technology Vol 2, No 2 (2016)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (65.758 KB) | DOI: 10.5281/zenodo.2581969

Abstract

Asbuton is a rock that contain the bitumen. Asbuton can be used as road construction alternatives after extracting bitumen from the mineral. A method for separating bitumen is separation process using hot water medium. The process was carried out in a stirred tank, 200 grams of asbuton was mixed with diesel oil and added by hot chemical solution (surfactant) in the digestion tank. The Separation process in the extractor was made at then the speed of stirrer were set according to the variable and time was set 30 minutes. After the complete process, the mixture was moved into a beaker glass and 500 ml hot water was added. The mixture of diesel oil and bitumen will float in the surface then the density will be measured to determine the bitumen concentration. It can be concluded that concentration of surfactant solution and speed of stirrer gave the significant results. The highest recovery percentage of bitumen is 81,99 %. Keywords: asbuton, hot water, surfactant, speed of stirrer
Effect of Particle Size Distribution on Ammonium Sulphate Dried in a Rotary Dryer Susianto, Susianto; Altway, Ali; Kuswandi, Kuswandi; Margono, Margono
IPTEK The Journal for Technology and Science Vol 21, No 3 (2010)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v21i3.37

Abstract

The aim of this work is to study theoretically, by mathematical model development, the effect of particle size distribution on the performance of rotary dryer to dry ammonium sulphate fertilizer assuming plug flow with axial dispersion pattern (PFDA model) for solid particle flow. The mathematical model development was carried out by combining the drying processes model with particle size distribution model. Particle size distribution models used are Rosin-Rommler model and Gamma distribution model. For simplicity, the model of drying processes of solid particles in the rotary dryer was developed by assuming of uniform air conditions (temperature and humidity) along the rotary dryer as in the entry conditions. The resulting differential equations were solved analytically under Matlab 6.1 facility.Since this model, solid hold up, and axial dispersion number were obtained from empirical correlations in the literatures. The drying rate of ammonium sulphate fertilizer in rotary dryer was estimated using isothermal diffusion model with effective diffusivity of moisture in the particle obtained from previous study [2]. Using Gamma function distribution, this research showed that for the value of the coefficient of variance (CV) less than 0.5, particle size distribution does not have significant effect on dryer performance. For the value of CV greater than 0.5, the dryer performance increase (or outlet solid moisture content decrease) with increasing the value of CV. The application of Rosin-Rammler model gives lower prediction of outlet solid moisture content compared to the application of Gamma function model.
Simulation of Gas-Solid-Liquid Flow in Membrane Bioreactor Submerged Palupi, A. E.; Harahap, A. H.; Meydita, A. D.; Winardi, S.; Altway, A.
IPTEK The Journal for Technology and Science Vol 19, No 1 (2008)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v19i1.155

Abstract

Hydrodynamics characteristic for the mixing of gas-solid-liquid in membrane bioreactor submerged (MBRs) and its influence on mass transfer was studied computationally at various solid concentration, incoming gas rate, and the baffle distance. Computational method was conducted by using software GAMBIT 2.1.6. for the making of the grid which represents the calculation domain and conduct the simulation using CFD software FLUENT commercial code 6.2.16. The calculation result was recorded after the iteration reach the certain convergence level. Multiphase flow in reactor was simulated with mixture model, while to model the turbulence characteristic of the flow standard k-ε model was used. The geometric system studied is bioreactor in the form of box with flat bottom, 2 baffles, submerged hollow fiber membrane and air passage at the bottom of the reactor. For the membrane modeling, it is used two approaches that is membrane as black box and membrane as porous media. The liquid used is water, and the solid is activated sludge, and air acts as gas phase. The result indicates that gas-solidliquid system with the nearest baffle location from the membrane cause, the liquid dispersion process goes faster, so that fluid in the tank can be mixed perfectly and it can increase the gas-liquid mass transfer rate and the flux at MBRs. The increase of the solid concentration does not significantly affect the change of gas-liquid mass transfer rate and flux through the membrane, but the increase of air flow rate can increase the gas-liquid mass transfer and the flux. Porous media approach give the prediction of the gas hold up distribution more over all than black box approach. The position of baffle 9 cm from tank wall is the best position viewed from the balance between the of air flow with the circulating fluid flow. Considered from the solid distribution, double inlet MBRs is better compared to that of single inlet. Flux obtained does not show significant difference. From both approaches of the membrane model, membrane model as porous media give the simulation results closer to the experimental data.
Performance of Submerged Membrane Bioreactor Combined with Powdered Activated Carbon Addition for the Treatment of an Industrial Wastewater Widjaja, Tri; Altway, Ali; Soeprijanto, Soeprijanto
IPTEK The Journal for Technology and Science Vol 21, No 1 (2010)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v21i1.24

Abstract

Membrane technology is one of the alternative solutions to overcome industrial wastewater treatment developed nowadays. The addition of PAC (Powdered Activated Carbon) in the activated sludge using Submerged Membrane Adsorption Hybrid Bioreactor (SMAHBR) is expected to increase the organic material removal. The purpose of this study was to determine the performance of submerged membrane bioreactor and activated carbon adsorption capacity of organic materials in wastewater. This study used SIER (Surabaya Industrial Estate Rungkut – Surabaya, Indonesia) waste as activated sludge operated at Mixed Liquor Suspended Solid (MLSS) concentrations of 8000 and 15000 mg/l, and Chemical Oxygen Demand (COD) concentrations of 1500, 2500 mg/l, Sludge Retention Time (SRT) of 10;20; and 30 days and activated carbon variables of 0%; 2.5%; 5%; 7.5%; 10%. The results showed that the fouling potential occurred at high MLSS where the COD removal occurred at PAC addition of 10% reaching 91.86%. High Soluble Microbial Product (SMP) accumulation (± 10 mg/l) occurred in short SRT and high MLSS concentration. PAC addition resulted in decreased microorganisms in the reactor and better effluent of SMAHBR, as a result, the performance of the submerged membrane bioreactor would be restored.
Simulasi absorpsi multikomponen gas dalam larutan K2CO3 dengan promoter MDEA pada packed column Ningsih, Erlinda; Pudjiastuti, Lily; Wulansari, Dessy; Anggraheny, Nurul; Altway, Ali; Budhikarjono, Kuswandi Kusno
Jurnal Teknik Kimia Indonesia Vol 11, No 1 (2012)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2012.11.1.3

Abstract

Simulation of multi-component gas absorption in the K2CO3 solution with promoter MDEA in packed column This research aims to study theoretically the performance of packed column to absorb CO2 and H2S from acid gas using MDEA promoted K2CO3 solution by considering solubility of other gases. Performance is expressed as CO2 recovery percentage. Research was carried out by developing simulation program of gases absorption with chemical reaction in packed column under isotherm condition. Prediction results were validated with petrochemical plant data. The simulation program can predict concentration distribution of dissolved gases and reactants in liquid phase at packed column and also the percentage of CO2 and H2S recovery. Results show that CO2 and H2S recovery increase with the increasing pressure and liquid flow rate. The study also depicts presence of an optimum temperature where CO2 recovery increases with increasing temperature below optimum temperature and decrease with increasing temperature above optimum temperature. The absorption rate increase or decrease with increasing temperature depending on relative effect of temperature on reaction rate, gas diffusivity and solubility. For CO2 absorption into MDEA promoted 30% K2CO3 solution at packed column 3 m in diameter, and 30 m in height filled with 7 cm IMPT packing, the highest CO2 removal efficiency is 99.947% on 100 oC, 32 atm, liquid flow rate of 5900 m3/hr, and gas flow rate of 308 kNm3/hr. Keywords: reactive absorption, isothermal, multi-component, promoter, two-film modelAbstrakPenelitian ini bertujuan untuk mempelajari secara teoritis kinerja packed column untuk absorpsi CO2 dan H2S dari gas asam dengan larutan K2CO3 dan promotor MDEA dengan memperhatikan kelarutan gas-gas yang lain, yang dinyatakan dengan %-recovery CO2. Penelitian ini dilaksanakan dengan membuat program simulasi untuk absorpsi gas CO2 disertai reaksi kimia dalam kondisi isothermal. Hasil prediksi simulasi ini divalidasi dengan data lapangan. Dengan menggunakan model packed column ini, diperoleh distribusi konsentrasi gas-gas terlarut, distribusi konsentrasi reaktan dalam fasa cair dalam kolom absorber dan prediksi %-recovery CO2 dan H2S. Hasil penelitian menunjukkan bahwa semakin tinggi tekanan dan laju alir absorben %-penghilangan CO2 dan H2S semakin besar. Hasil penelitian menunjukkan adanya suhu optimum. Di bawah suhu optimum kenaikan suhu menyebabkan kenaikan %-penghilangan sedangkan di atas suhu optimum kenaikan suhu menurunkan %-penghilangan. Laju absorpsi meningkat tergantung pada pengaruh relatif temperatur pada konstanta kecepatan reaksi, difusivitas dan kelarutan gas yang terserap. Untuk absorpsi gas CO2 kedalam larutan K2CO3 30% dengan promotor MDEA pada packed column dengan diameter 3 m dan tinggi 30 m yang diisi dengan packing IMPT 7 cm diperoleh penghilangan CO2 tertinggi 99,947% pada kondisi laju alir larutan 5900 m3/jam, temperatur 100 oC, laju alir gas 308 kNm3/jam serta tekanan 32 atm.Kata kunci: absorpsi reaktif, isothermal, multikomponen, promoter, model dua film.
PENANGKAPAN CO2 DENGAN MENGGUNAKAN PELARUT KALIUM KARBONAT BERPROMOTOR ASAM BORAT (CO2 Capture Using Potassium Carbonate solvent with Boric Acid Promoter) Istiyanie, Dewi; Altway, Ali
Lembaran publikasi minyak dan gas bumi Vol 50, No 3 (2016)
Publisher : PPPTMGB "LEMIGAS"

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (654.142 KB) | DOI: 10.29017/LPMGB.50.3.4

Abstract

Penangkapan CO2 dengan menggunakan pelarut kalium karbonat sampai saat ini masih terdapat kelemahan, yaitu laju reaksi yang lambat. Pada penelitian ini untuk mengatasinya maka digunakan promotor asam borat karena lebih ekonomis dan ramah lingkungan. Uji coba skala laboratorium dilakukan dengan sistem kontinu, yaitu dengan cara mengalirkan gas CO2 (20%) ke dalam pelarut K2CO3 (30%) berpromotor H3BO3 (3%) di dalam absorber pada suhu 50-70oC. Pelarut yang sudah mengandung CO2 akan dialirkan ke dalam desorber. Desorber dipanaskan hingga 70-90oC agar CO2 yang terabsorp di dalam pelarut dapat dilepaskan kembali. Pelarut K2CO3 akan masuk kembali ke dalam Tangki Pelarut untuk digunakan kembali dalam proses absorpsi CO2, dan seterusnya. Pada percobaan diukur konsentrasi gas CO2 yang masuk ke dalam absorber, yang keluar dari absorber, dan yang tidak terserap oleh absorber dengan menggunakan CO2 Analyzer. Sedangkan laju alir gas CO2 yang masuk ke dalam absorber dan yang keluar dari absorber diukur dengan menggunakan Flowmeter Digital. Konsentrasi pelarut juga diukur pada titik-titik yang sama dengan menggunakan metode titrasi. Laju alir pelarut yang masuk ke dalam absorber pada percobaan ini adalah konstan, sedangkan laju alir gas CO2 yang masuk ke dalam absorber divariasikan pada laju alir gas CO2 sebesar 1,25 liter/menit, 1,5 liter/menit, dan 2 liter/menit. Hasil terbaik dicapai pada laju alir gas CO2 sebesar 1,5 liter/menit dan diperoleh efisiensi penangkapan gas CO2 sebesar 87,63%.CO2 capture using potassium carbonate solvent until now there are still weaknesses, namely the slow reaction rate. In this research, to overcome this weakness, boric acid promoter was used due to more economical and environmental friendly. Laboratory scale trial run was conducted with a continuous system, namely by bubbling CO2 (20%) into K2CO3 solution (30%) promoted by H3BO3 (3%) in the absorber at a temperature of 50-70oC. Solvent already containing CO2 would be transported into a desorber. The desorber was operated at temperature of 70-90oC causing the absorbed CO2 in the solvent can be released again. K2CO3 solvent will go back into the solvent tank for reuse in the process of absorption of CO2, and so on. In the experiment the concentration of CO2 that goes into absorber, which came out of the absorber, and that is not absorbed by the absorber were measured using a CO2 Analyzer. While the flow rate of CO2 gas that goes into and out of the absorber were measured using Digital Flowmeter. The concentration of the solvent is also measured at the same points using titration method. The flow rate of solvent into the absorber in the experiment are constant, while the flow rate of CO2 gas into the absorber was varied at a flow rate of 1.25 liters / min, 1.5 liters / minute, and 2 liters / minute , Best results are achieved in CO2 gas flow rate of 1.5 liters / minute and acquired CO2 capture efficiency of 87.63%.
Co-Authors Abdul Hafid Abubakar Tuhuloula Achmad Roesyadi Adi Soeprijanto Aditya Akhmad Sony Afan Hamzah, Afan Afri Dwijatmiko Aisyah Alifatul Altway, Saidah Anggraheny, Nurul Annasit Annasit Atha Pahlevi Ayu Larasati Azka Afuza Bayu Yusuf Budhikarjono, Kuswandi Kusno Dwi Arimbi Wardaningrum Eldira Nindri Wena Endah Prasetyo Rini Eriska Wahyu Kusuma Erlinda Ningsih, Erlinda Fadillatul Taufany Fadlilatul Taufany Faris Adrian Firsta Hardiyanto Gissa Navira Sevie Haqqyana Haqqyana Harahap, A. H. Hendi Riesta Mulya Istiyanie, Dewi Istiyanie, Dewi Junety Monde Juwari Juwari K Kusnaryo K Kuswandi Karnila Willard Koatlely Serpara Kusnarjo Kusnarjo Kuswandi Kuswandi Kuswandi Kuswandi Kuswandi Kuswandi Lailatul Qadariyah Lailatul Qomariyah, Lailatul Lily Pudjiastuti, Lily Ling Ling M Rachimoellah M Rachimoellah Mahfud Mahfud Mahfud Mahfud Margono Margono Medya Ayunda Fitri Merisa Veronika Suparto Meydita, A. D. Miftah Imam Maarif Mochamad Sidiq Muhammad Alraedi Syukharial Muhammad Anshorulloh Mukhlish Muhammad Fadlan Minallah Muhammad Iqbal Musfil AS Nabila Farras Balqis Nadhifa Auria Andini Nonot Soewarno Nora Amelia Novitrie Novitrie, Nora Amelia Nuniek Hendrianie Nur Aini Nadhifah Nur Ihda Farihatin Nisa Nur Ihda Farikhatin Nisa Nur Ihda Farikhatin Nisa Nurkhamidah, Siti Palupi, A. E. Prapti Ira Kumala Sari R. Darmawan Darmawan Rachmaniah, Orchidea Ragilia Rahma Maulidia Renanto Handogo Rendra Panca Anugraha Ruben Leonardo Panjaitan Salasa Ariq Sungkono Samuel Sembiring Siti Machmudah Siti Nurchamidah Siti Nurkamidah Siti Zullaikah Sri Rachmania Juliastuti Sugeng Winardi Suhadi Suhadi Suhadi Suprapto Suprapto Suprapto Suprapto Surya Rachmadani Susianto S Susianto Susianto Susianto Susianto Tantular Nurtono Tri Widjaja Tri Widjaja Trisna Kumala Dhaniswara W Widiyastuti Wahyu Adinda Larasati Widiyastuti Winardi, S. Winardi, Sugeng Wulansari, Dessy Yeni Rahmawati, Yeni Yosita Dyah Anindita Yunita D Indrasari Zulfahmi Hawali