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All Journal Majalah Forum Teknik UGM Reaktor International Journal of Renewable Energy Development Jurnal Teknik ITS IPTEK The Journal of Engineering IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan Journal of Research and Technology Indonesian Journal of Chemistry Jurnal Purifikasi CHEESA: Chemical Engineering Research Articles JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia Jurnal Pengabdian dan Peningkatan Mutu Masyarakat (JANAYU) Sewagati Petrogas : Journal of Energy and Technology Bulletin of Chemical Reaction Engineering & Catalysis Journal of Fundamentals and Applications of Chemical Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN
Ali Altway
Chemical Engineering Department, Institute Technology Of Sepuluh Nopember, Surabaya,
Religion 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 Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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Prediksi Kesetimbangan Uap-Cair Sistem Biner 3-Pentanol + Asam Propionat Sebagai Basis Pada Proses Desain Pemurnian Biofuel Bekti, Andi Setyo; Paramitha, Pradnya; Altway, Saidah; Wibowo, Agung Ari
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

The depletion of fossil fuels has led to a turn toward renewable and cleaner diesel fuel. In recent years, research has focused on the development of green energy to replace fossil fuels. 3-Pentanol is the preferred alternative fuel because it has better fuel properties compared to other biofuels. 3-Pentanol, as a propionic acid derivative chemical platform, can be produced from renewable biomass through the lactic acid pathway. Therefore, to obtain 3-Pentanol with high purity, a purification process such as distillation is required. Vapor-liquid equilibrium data and the thermodynamic model parameters are needed as basis for designing a distillation column and optimizing the separation process. The aim of this study is to predict the vapor-liquid equilibria (VLE) of the binary systems of 3-Pentanol + propionic acid at 100 kPa, 200 kPa, and 300 kPa using the UNIFAC model in combination with the Hayden-O’Connell model. The prediction results showed no azeotropes found for the studied systems. This study can also open a scope for the thermodynamic studies of biofuel separation process.
Prediksi Kesetimbangan Cair-Cair pada Sistem Air + Asam Format + Pelarut Organik dengan Model UNIFAC Azaim, Ahmad Hayiz; Ramadhani, Farah Amirah Firyal; Altway, Saidah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Formic acid can be produced by a fermentation process, producing an aqueous solution in the form of a fermentation broth. The separation of formic acid from water is challenging due to the presence of an azeotropic mixture. The aim of this research is to predict the liquid-liquid equilibrium data using the universal functional activity coefficient (UNIFAC) model for formic acid + organic solvent + water systems at 298.15 and 323.15 K and atmospheric pressure (101.3 kPa). The liquid-liquid equilibrium data are required as a reference for optimal design of formic acid extraction process. This research also introduces new two-phase systems for the separation of formic acid from aqueous solution and expands the scope of thermodynamic studies on formic acid extraction. The extraction performance was in the order of MIPK > 2-hexanone > MIBK. The temperature has no significant influence on the extraction performance. The prediction of formic acid + water + MIBK system at 298,15 K and atmospheric pressure (101.3 kPa) was also compared with the experimental data with the RMSD 9,76 %. This result represented that UNIFAC was a reliable model for the prediction of liquid-liquid equilibria of system involving formic acid.
Prediksi Data Kesetimbangan Cair-cair Pada Sistem Terner Air + Asam Laktat + Pelarut Menggunakan Model UNIFAC-DMD Sugiarto, Kurniawan Wahyu; Honora, Faradiba; Altway, Saidah; Zuchrillah, Daril Ridho
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Industrial lactic acid can be produced via chemical synthesis and fermentative production. However, due to the environmental issue and consumer preference, fermentative production of lactic acid is preferable. Lactic acid is used in many industries, including food processing, pharmaceutical, chemical and cosmetic industries. Various methods have been developed for separating lactic acid from its aqueous solution, and liquid-liquid extraction is considered as the most promising and efficient method. Liquid-liquid equilibrium data provide the basis for a rational design and optimal extraction operation. The objective of this study is to predict the liquid-liquid equilibria in the ternary systems of water+ lactic acid + solvent (MIBK, 2-pentanol, 1-hexanol) at temperatures of 303.15 K and 313.15 K and atmospheric pressure (101.3 kPa) using the UNIFAC-Dortmund (DMD) model. The distribution coefficients and separation factors were determined to evaluate the extraction performance of lactic acid. The extraction performance was in the order of MIBK > 1-hexanol > 2-pentanol. The prediction of lactic acid + water + MIBK system at 303,15 K was also compared with the experimental data with the RMSD 2,5 %. This result represented that UNIFAC-DMD was a reliable model for the prediction of liquid-liquid equilibria of system involving lactic acid.
Pengaruh Gliserol sebagai Plasticizer terhadap Karakterisasi Edible Film dari Kappa Karaginan Larasati, Wahyu Adinda; Rahmawati, Yeni; Taufany, Fadlilatul; Susianto, Susianto; Altway, Ali; Nurkhamidah, Siti
Eksergi Vol 21 No 3 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i3.12451

Abstract

Perkembangan industri pengemasan makanan di era mendatang akan beralih ke bahan alami dan ramah lingkungan yang bisa diproduksi dari biopolimer seperti pati dan hidrokoloid lainnya untuk mengurangi paparan polusi dari polimer sintetis. Kappa karaginan memiliki sifat yang rapuh, sehingga dibutuhkan plasticizer untuk menghasilkan edible film yang lebih elastis. Jenis plasticizer yang digunakan adalah gliserol. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh konsentrasi gliserol terhadap karakterisasi edible film dari kappa karaginan. Kappa karaginan dengan konsentrasi 1% (b/v) dilarutkan dengan akuades kemudian ditambahkan gliserol dengan variasi konsentrasi 0,5; 1; 1,5, dan 2% (b/v). Edible film kemudian di karakterisasi berdasarkan sifat mekanik, gugus fungsional, ketebalan, kadar air, kuat tarik, elongasi, warna dan opacity. Hasil analisa menunjukkan bahwa penambahan gliserol sebesar 1% dapat meningkatkan sifat mekaniknya, dan film mempunyai 0,146 mm, kadar air 17,90%, kuat tarik dan elongasi 2,53 MPa dan 14,09% dan sifat optik warna dan opacity masing-masing sebesar 96,96% dan 1,32. 
Mechanistic Modeling of a Spiral-Wound Nanofiltration Module using DSPM-DE for High-Purity Salt Recovery from Desalination Brine Sugianto, Mohamad; Altway, Ali; Susianto
Eksergi Vol 23 No 1 (2026)
Publisher : Prodi Teknik Kimia UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v23i1.15947

Abstract

Rejected brine is a concentrated NaCl stream whose elevated Ca²⁺, Mg²⁺, and SO₄²⁻ depress the quality of industrial salt. We built a mechanistic model of a spiral-wound KeenSen NF1-4040F nanofiltration (NF) element using the Donnan–Steric Pore Model with Dielectric Exclusion coupled to the Extended Nernst–Planck equations. Radial transport is coupled to axial mass balances and solved at steady, isothermal conditions over  bar and . Water flux  increases almost linearly with ; along the module  falls and  rises nearly linearly. Recovery increases with  but decreases with . Flux decomposition shows cations are convection-dominated, whereas anions carry larger shares of diffusion and electromigration. Predicted end-of-module rejections are ≈ 99.0-99.3%, ≈ 97.6-98.1%, ≈ 96.0-96.6%, ≈ 88-89%, and ≈ 74-75%, confirming divalent ≫ monovalent selectivity. Linking to product quality, the simulated permeate at  bar and  yields a conservative dry-salt purity of ~96.9 wt% NaCl when all non-halite salts co-precipitate. Under halite-first crystallization with a gypsum pre-step and bittern purge, only a minor fraction co-crystallizes, giving ≥98.5 wt% (≈99.5 wt% for a 20% co-crystallization assumption). Thus, operating at moderate-to-high  with moderate cross-flow not only maximizes recovery and divalent rejection but also supplies a permeate that can be crystallized to SNI-compliant high-purity salt.
Tin Extraction from Slags Used Hydrochloric Acid Nonot Soewarno; Ali Altway; Susianto; Fadlilatul Taufany; Siti Nurkhamidahis
IPTEK The Journal of Engineering Vol. 1 No. 1 (2014)
Publisher : Institut Teknologi Sepuluh Nopember

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Abstract

Slag is a mixture of mineral in tin sand or by product in the smelting process. By using separation process, tin can be separated from other minerals in slag. Extraction process with a solvent is usually used to separate tin from other minerals. Furthermore, solution that still contains many dissolved compounds is adsorbed by activated carbon and desorption back with NaOH solution. This study only focuses on the extraction process to obtain a stannate chloride solution with extraction temperature, solvent concentration, extraction time, and liquid/solid ratio as variables. Hydrochloric acid (HCl) has been used as solvent in this study. The concentration of tin in the extracts of each variable was analyzed to determine the percentage of recovery of tin and the optimum operating conditions in the recovery process of tin from waste slag. Experiment results show that the percentage of recovery increases with the increasing of extraction temperature and solvent concentration The highest recovery is 61.5% which is obtained when the extraction temperature is 80 ºC, concentration of HCl is 10 wt%, with a HCl solution and slag ratio is 7: 1 and extraction time is about 30 minutes.
Prediction of Gas-Liquid Equilibria of CO2-K2CO3-MDEA-H2O System by Electrolyte UNIQUAC Model Saidah Altway; Kuswandi; Ali Altway
IPTEK The Journal of Engineering Vol. 1 No. 1 (2014)
Publisher : Institut Teknologi Sepuluh Nopember

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Abstract

Carbon dioxide is an acid gas that can be harmful impurity especially in the chemical industry. Various processes have been developed to reduce the CO2 from the gas stream. Chemical absorption is the most economical method for CO2 separation. One of the processes that is widely used in industries is Benfield process with K2CO3 (potassium carbonate) as a solvent and amine as a promotor. In this study, MDEA (Methyldiethanolamine) is used as a promotor. As a reference for designing CO2 absorption/stripping packed column in industries, gas-liquid equilibrium data were required. The objective of this study is to predict the gas-liquid equilibria of CO2-K2CO3-MDEA-H2O system at 30oC and atmospheric pressure with 30% K2CO3 and variation of weight percent of MDEA 2, 5, 8, and 10%. The model used in this study is an electrolyte UNIQUAC. The simulation was conducted using Matlab programming. The deviation of predicted CO2 partial pressure with the experimental data is 14.85%. The energy interaction parameters of electrolyte UNIQUAC model were obtained from fitting with the experimental data by Least Square method. The results of this study represented that with increasing CO2 partial pressure, CO2 loading increased, and also at the same partial pressure of CO2, CO2 loading increased with the increase of weight percent of MDEA
Performance Test Membrane Contactor for CO2 Desorption from DEA Yeni Rahmawati; Salasa Ariq Sungkono; Zulfahmi Hawali; Fadlilatul Taufany; Susianto; Siti Nurkhamidah; Ali Altway
IPTEK The Journal of Engineering Vol. 9 No. 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i1.a16642

Abstract

Membrane-based desorption of carbon dioxide (CO2) using a membrane contactor is considered a novel process for separating CO2 from solvents. It can be carried out using temperature regeneration, sweep gas, and vacuum method. In this work, the vacuum regeneration method is applied in the CO2 desorption process from 30% wt of diethanolamine (DEA) solution. This study investigates the effect of operating parameters such as liquid flowrate, vacuum pressure, and CO2 loading on the mass transfer rate and desorption efficiency of CO2. The highest mass transfer rate of 2.2013 × 10-7 mol/m2s is achieved at a liquid flowrate of 500 mL/min, CO2 loading of 0.27 mol CO2/mol DEA, and vacuum pressure of 50 cmHg while the maximum desorption efficiency of 71.45% is achieved at lower liquid flowrate of 100 mL/min, CO2 loading of 0.27 mol CO2/mol DEA, and vacuum pressure of 50 cmHg. The result demonstrates that membrane contactor is a promising method for the CO2 desorption process which requires further investigation.
Co-Authors Abubakar Tuhuloula Achmad Dwitama Karisma Achmad Roesyadi Adi Soeprijanto Aditya Akhmad Sony Afan Hamzah, Afan Afri Dwijatmiko Agung Ari Wibowo Agus Surono Agustiani, Elly Aisyah Alifatul Altway, Saidah Anggraheny, Nurul Annasit Annasit Ardiani, Liana Aris Tjahyanto Atha Pahlevi Atletiko, Faizal Johan Ayu Larasati Azaim, Ahmad Hayiz Azka Afuza Bayu Yusuf Bekti, Andi Setyo Budhikarjono, Kuswandi Kusno Dewi Istiyanie Dwi Arimbi Wardaningrum Eldira Nindri Wena Endah Prasetyo Rini Eriska Wahyu Kusuma Erlinda Ningsih, Erlinda Fadlilatul Taufany Fadlilatul Taufany Fahmi Fauziah, Melinda Nur Firsta Hardiyanto Gianfranco, Enrique Gissa Navira Sevie Hafid, Abdul Haqqyana Haqqyana Harahap, A. H. Hendi Riesta Mulya Honora, Faradiba Istiyanie, Dewi Istiyanie, Dewi Juwari Juwari K Kusnaryo K Kuswandi Karnila Willard Koatlely Serpara Kusnarjo Kusnarjo Kuswandi Kuswandi Kuswandi Kuswandi Kuswandi Kuswandi Kuswandi Lailatul Qadariyah Lailatul Qomariyah, Lailatul Larasati, Wahyu Adinda Lily Pudjiastuti, Lily Ling Ling M Rachimoellah M Rachimoellah Mahfud Mahfud Mahfud Mahfud Margono Margono Medya Ayunda Fitri Merisa Veronika Suparto Meydita, A. D. Mochamad Sidiq Muhammad Anshorulloh Mukhlish Muhammad Fadlan Minallah Muhammad Iqbal Musfil AS Nabila Farras Balqis Nadhifa Auria Andini Niniek Fajar Puspita, Niniek Fajar Nonot Soewarno Nonot Soewarno Nora Amelia Novitrie Nora Amelia Novitrie Novitrie, Nora Amelia Nugroho, Muhammad Aldi Nuniek Hendrianie Nuniek Hendrianie Nur Aini Nadhifah Nur Ihda Farihatin Nisa Nur Ihda Farikhatin Nisa Nurkhamidah, Siti Palupi, A. E. Pambudi, Alfian Wisnu Pamungkas, Raditya Pamungkas, Raditya Yudhi Pradnya Paramitha, Pradnya Prapti Ira Kumala Sari Prida Novarita Trisanti, Prida Novarita Putri, Rheyna Casca Hanafi R. Darmawan Darmawan Rachmaniah, Orchidea Ragilia Rahma Maulidia Raja, Risfanali Ramadhani, Farah Amirah Firyal Renanto Handogo Rendra Panca Anugraha Rohmah, Nur Azizatur Rohmah, Nur Azizatur Rohmania, Inti Ruben Leonardo Panjaitan S, Susianto Salasa Ariq Sungkono Samuel Sembiring Siti Machmudah Siti Nurchamidah Siti Nurkamidah Siti Nurkhamidah Siti Nurkhamidahis Siti Zullaikah Sri Rachmania Juliastuti Sugeng Winardi Sugianto, Mohamad Sugiarto, Kurniawan Wahyu Suhadi Suhadi Suhadi Suhadi Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Surya Rachmadani Susianto Susianto S Susianto Susianto Susianto Susianto Susianto, Susianto Syukharial, Muhammad Alraedi Tantular Nurtono Taufany, Fadlilatul Tetrisyanda, Rizky Tri Widjaja Tri Widjaja Trisna Kumala Dhaniswara W Widiyastuti Wahyu Adinda Larasati Wahyu Meka Warlinda Eka Triastuti Widiyastuti Winardi, S. Winardi, Sugeng Wulansari, Dessy Yeni Rahmawati Yeni Rahmawati, Yeni Yosita Dyah Anindita Yunita D Indrasari Zuchrillah, Daril Ridho Zulfahmi Hawali