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All Journal Jurnal Manajemen Terapan dan Keuangan Reaktor Indonesian Journal of Mathematics and Natural Sciences Sinergi Seminar Nasional Teknik Kimia Kejuangan Prosiding Semnastek JAKU (Jurnal Akuntansi & Keuangan Unja) (e-journal) Jurnal Akuntansi dan Pajak Current : Jurnal Kajian Akuntansi dan Bisnis Terkini Journal of Management - Small and Medium Enterprises (SME's) East Asian Journal of Multidisciplinary Research (EAJMR) Journal of Materials Exploration and Findings Makara Journal of Technology Journal of Innovation in Management, Accounting and Business Jurnal Karya Abdi Masyarakat Jambi Accounting Review (JAR) International Journal of Multidisciplinary Approach Research and Science JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah Jurnal Akuntansi, Manajemen, dan Perencanaan Kebijakan International Journal of Economic Research and Financial Accounting Journal of Management, Economic, and Financial Jurnal Mediasas : Media Ilmu Syari'ah dan Ahwal Al-Syakhsiyyah Jurnal Siber Multi Disiplin Jurnal Cakrawala Akuntansi
Yuliusman Yuliusman
Departemen Teknik Kimia, Fakultas Teknik, Universitas Indonesia, Depok 16424
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences

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Journal : Makara Journal of Technology

 1 
Kinetic Model For Triglyceride Hydrolysis Using Lipase:Review Hermansyah, Heri; Wijanarko, A.; Dianursanti, Dianursanti; Gozan, Misri; Wulan, Praswasti P. D.K; Arbianti, Rita; Soemantojo, Roekmijati W.; Utami, Tania Surya; Yuliusman, Yuliusman; Kubo, Momoji; Kitakawa, Naomi Shibasaki; Yonemoto, Toshiy
Makara Journal of Technology Vol. 11, No. 1
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Triglyceride hydrolysis using lipase has been proposed as a novel method to produce raw materials in food and cosmetic industries such as diacylglycerol, monoacylglycerol, glycerol and fatty acid. In order to design a reactor for utilizing this reaction on industrial scale, constructing a kinetic model is important. Since the substrates are oil and water, the hydrolysis takes place at oil-water interface. Furthermore, the triglyceride has three ester bonds, so that the hydrolysis stepwise proceeds. Thus, the reaction mechanism is very complicated. The difference between the interfacial and bulk concentrations of the enzyme, substrates and products, and the interfacial enzymatic reaction mechanism should be considered in the model.
CO2 Absorption from Its Mixture with CH4 or N2 through Hollow Fiber Membrane Contactor using Water as Solvent Kartohardjono, Sutrasno; Anggara, Anggara; Subihi, Subihi; Yuliusman, Yuliusman
Makara Journal of Technology Vol. 11, No. 2
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CO2 Absorption from Its Mixture with CH4 or N2 through Hollow Fiber Membrane Contactor using Water as Solvent. Hollow fiber membrane contactors have been widely used as gas-liquid contactors recently such as in the CO2 absorption process from gas stream. This research aims to evaluate the effectiveness of hollow fiber membrane contactor to absorb CO2 from its mixture with CH4 or N2 using water through mass transfer and hydrodynamic tests. There are 3 membrane modules used in this research with shell diameter of 1.9 cm, length of 40 cm, outer fiber diameter of 2.7 mm and fiber number in the contactors of 10, 15 and 20. Liquid flow rates in the hollow fiber membrane contactors are varied in this research. Research results show that mass transfer coefficients in the membrane contactor increase with increasing liquid flow rate and decrease with increasing fiber number in the contactor. Flux of CO2 into water can achieve 1.4x10-9 mol CO2 /m2.s and mass transfer coefficients can achieve 1.23 x 10-7 m/s. Meanwhile, hydrodynamic test results show that water pressure drop in the membrane contactors increase with increasing fiber number in the contactors.
Effects of Ph on Calcium Carbonate Precipitation Under Magnetic Field Saksono, Nelson; Yuliusman, Yuliusman; Bismo, Setijo; Soemantojo, Roekmijati W.; Manaf, Azwar
Makara Journal of Technology Vol. 13, No. 2
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Magnetic field effect on CaCO3 precipitation is the key parameter in evaluating the effectiveness of Anti-scale Magnetic Treatment (AMT). The purpose of this study was to investigate magnetic fields influence on CaCO3 precipitation in high and low super-saturated CaCO3 solution by varied pH CaCO3 solution using circulation flow fluid system. The observation results in the high super saturated solution (pH 8.5) showed the increase of precipited CaCO3 in magnetized solutions compared to those in non-magnetic solution during circulation process. In the low super-saturated CaCO3 solution (pH 6.4) it was found that magnetic treatment increased CaCO3 precipitation after circulation process. In high super-saturated solution, magnetic field strengthens ion interactions, which reduce precipitation during circulation process. However, in low super-saturated CaCO3 solution, magnetic field weakens hydrate ion interaction which indicated by decreasing of the conductivity of solution. It increases the precipitation of CaCO3 after the circulation of magnetization process has completed.
Performance of Hollow Fiber Membrane Gas-Liquid Contactors to Absorb CO2 Using Diethanolamine (Dea) as a Solvent Kartohardjono, Sutrasno; Nata, Pan Ade; Prasetio, Eko; Yuliusman, Yuliusman
Makara Journal of Technology Vol. 13, No. 2
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This study uses DEA solution to absorb CO2 from the gas flow through the hollow fiber membrane contactors. This study aims to evaluate the performance of hollow fiber membrane contactors to absorb CO2 gas using DEA solution as solvent through mass transfer and hydrodynamics studies. The use of DEA solution is to reduce the mass transfer resistance in the liquid phase, and on the other side, the large contact area of the membrane surface can cover the disadvantage of membrane contactors; additional mass transfer resistance in the membrane phase. During experiments, CO2 feed flows through the fiber lumens, while the 0.01 M DEA solution flows in the shell side of membrane contactors. Experimental results show that the mass transfer coefficients and fluxes of CO2 increase with an increase in both water and DEA solution flow rates. Increasing the amount of fibers in the contactors will decrease the mass transfer and fluxes at the same DEA solution flow rate. Mass transfer coefficients and CO2 fluxes using DEA solution can achieve 28,000 and 7.6 million times greater than using water as solvent, respectively. Hydrodynamics studies show that the liquid pressure drops in the contactors increase with increasing liquid flow rate and number of fibers in the contactors. The friction between water and the fibers in the contactor was more pronounced at lower velocities, and therefore, the value of the friction factor is also higher at lower velocities.
Co-Authors - Afrizal Aimanah, Ummul Alfi Maghfirwan Ramadhan, Alfi Amelia, Putri Ananda Putra Sangaji, Ananda Anggara Anggara Anggara Anggara, Anggara Anondho Wijanarko Arsyadt, Arsyadt Aurin, Rizkiza Az-zahra Osman, Rani Nur Azwar Manaf Clara Liany Tampubolon Dahmiri Dedy Setiawan Dianursanti Eko Prasetio, Eko Ernitasari, Reny F. Husni Hasbullah, F. Husni Farhana, Disya Yuke Fiqri, Sulthoni Fitri, Lucky Enggraini Fitrini Mansur FRIYANI, RITA Gowon, Muhammad Heri Hermansyah Hernando, Riski Hizazi, Ahmad Ilham Wahyudi Indra Lila Kusuma, Indra Lila Juliana, Widya Ika Kamilia, Athaya Khanza Kencana, Ulya Kezia Elkardiana, Kezia Kitakawa, Naomi Shibasaki Kurnia, Zirda Kurniawan, Rafmil Lestari, Anggi Putri Lucky Enggrani Fitri M. Iwan Fermi Mieldan, Ghina Ivana Misni Erwati, Misni Misri Gozan Momoji Kubo, Momoji Muhammad Amin Muhammad Ridwan Mukhzarudfa, Mukhzarudfa Musyayaddah, Musyayaddah Mutiya, Aprillia Naomi Shibasaki-Kitakawa, Naomi Nasruddin Nasruddin Nata, Pan Ade Natasa*, Nursima Nela Safelia Nelson Saksono Oktariani, Edma Nadhif Pan Nata, Pan Permata Sari, Lian Undari Praswasti P. D.K Wulan, Praswasti P. D.K Qodariah Barkah Rahayu Rahayu Ramadhani, Indira Putri Ramdhani, Suci Ratih Kusumastuti Reni Yustien Riani, Nita Rico Wijaya Z Rita Arbianti Roekmijati Soemantojo, Roekmijati Roekmijati W. Soemantojo, Roekmijati W. Sahrinra, Irgi Salman Jumaili Septari, Al-Iqrom Setijo Bismo Shelomita, Cindy Simanjuntak, Howard Sitepu, Latresia Aprilia BR Sohabat Nasuha Sonia, Reiny Erica Sri Wahyuni Subihi Subihi Subihi Subihi, Subihi Suci Ramadani, Aulia Sulistyawan, Angga Wahyu Susfayetti, Susfayetti Sutrasno Kartohardjono Takiah, Fitriatul Tania Surya Utami Toshiy Yonemoto, Toshiy Tuti, Srimastuti Utomo, Anggi Nugroho Violeta, Octa Diva Widodo Wahyu Purwanto Widodo Wahyu Purwanto Wijanarko, A. Wiwik Tiswiyanti Yudi Yudi Yuliana Yuliana Yulianto Sulistyo Nugroho