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All Journal Reaktor Jurnal Teknik Kimia USU Prosiding Semnastek Sriwijaya International Seminar on Energy-Environmental Science and Technology Communications in Science and Technology Jurnal Purifikasi Jurnal Teknik Kimia Indonesia Jurnal Teknik Kimia USU Makara Journal of Science Makara Journal of Technology
Tania Surya Utami
Departemen Teknik Kimia, Fakultas Teknik, Universitas Indonesia, Depok 16424, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Makara Journal of Technology

 1 
The Effect of Ca Content on CaO-Zeolite on Nitrogen Adsorption Capacity Nasikin, Mohammad; Utami, Tania Surya; Siahaan, Agustina TP
Makara Journal of Technology Vol. 6, No. 2
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In industry, Ca zeolite is used as nitrogen selective adsorbent with the use of PSA (Pressure Swing Adsorption)/VSA (Vacuum Swing Adsorption) methods. Natural zeolite modified to be Cao-zeolite by ion exchange process using Ca(OH)2. Adsorption test was done on CaO-zeolite with different Ca concentration to understand how it’s adsorption phenomena on oxygen and nitrogen. Adsorption test has been done for CaO-zeolite with Ca concentration = 0,682%, 0,849% and 1,244% to oxygen and nitrogen with equal concentration seperately. Pressure variation has being done three times (5 minutes long each time) adsorption time to analyze the connection between adsorption time and how many moles of nitrogen and oxygen being adsorbed. Adsorption test showed that there is a limit of Ca concentration to make CaO-zeolite more selective to adsorb nitrogen. CaO-zeolite with Ca concentration . 1,125% adsorb nitrogen more selective than oxygen. Because the nitrogen content in air is four times the oxygen so we can conclude that the air adsorption rate by zeolite will be four times the adsorption rate by oxygen. This differences in adsorption rate will make the use for CaO-zeolite as a oxygen enrichment equipment possible.
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.
Isolation of Methyl Laurate from Coconut Oil as Raw Material for Fatty Alcohol Sulfate Arbianti, Rita; Utami, Tania Surya; Nugroho, Astri
Makara Journal of Technology Vol. 12, No. 2
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Isolation of Methyl Laurate from Coconut Oil as Raw Material for Fatty Alcohol Sulfate. Methyl laurate is a raw or base material for many industries, including surfactant industries. In this research, coconut oil (VCO) is transesterified with methanol to produce methyl ester, using NaOH as the catalyst. Methyl laurate is then separated by method based on the difference in melting point. This research focuses at determining the effects of some variables in transesterification on the concentration of produced methyl laurate. The variables are temperature (40 oC, 50 oC, 60 oC, 80 oC), time of transesterification reaction (0,5 hour, 1 hour, 1,5 hours, 2 hours, 3 hours), and the percent weight of the catalyst NaOH (0,5 %, 1 %, 1,5 %, 2 %, 3 %). Research showed the concentration of methyl laurate increased, following the increased temperature, time, and percent weight of catalysts. Optimal conditions were acquired at reaction temperature of 60oC, reaction time of 2 hours, and percent weight of the catalyst NaOH of 2 %. Laurate acid conversion to methyl laurate that yielded from optimal conditions, after the separation based on melting point, was 55,61 %.
Performance Optimization of Microbial Fuel Cell (MFC) Using Lactobacillus bulgaricus Arbianti, Rita; Utami, Tania Surya; Hermansyah, Heri; Novitasari, Deni; Kristin, Ester; Trisnawati, Ira
Makara Journal of Technology Vol. 17, No. 1
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Electrical energy needs in Indonesia are expected to continue to rise. The use of petroleum as a source of energy still dominates, although oil reserves in Indonesia are increasingly being depleted. Therefore, there is a need to develop alternative sources of sustainable energy, such as microbial fuel cell (MFC). In this study, Lactobacillus bulgaricus was used as an electricity producer in a dual-chamber MFC reactor. We investigated the maximum electrical energy by varying the bacterial optical density (OD), the operational time of MFC, the reactor volume, the electrolyte solution, and the configuration of MFC reactor. In this study, the maximum electrical energy (201.8 mW/m2) was generated at an OD of 0.5 in an MFC reactor series using potassium permanganate as the electrolyte solution.
Co-Authors Adinda Putri Wisman, Adinda Agustina Siahaan Agustina Siahaan, Agustina Anandho Wijanarko Angelina Annisa Kurnia, Annisa Anondho Wijanarko Anondho Wijanarko Astri Nugroho Astri Nugroho Beta Nadia Manaf, Beta Deni Novitasari, Deni Dianursanti Diki Firdaus, Diki Eki Listya Rini Ester Kristin, Ester Fadilah Putri, Najah Fajar Achmadi Prianto Guruh Mehra Mulyana Hanung Adi Nugroho Heri Hermansyah Ira Setiawati Ira Trisnawati, Ira Josia Simanjuntak Kitakawa, Naomi Shibasaki M Mariana Maemonah, Maemonah Misri Gozan Mohamad Nasikin Mohammad Nasikin Mohammad Nasikin Momoji Kubo Momoji Kubo, Momoji Naomi Shibasaki-Kitakawa Naomi Shibasaki-Kitakawa, Naomi Nathania Dwi Karina Naufal Azrizal Prasetyo Praswasti P. D.K Wulan Praswasti P. D.K Wulan, Praswasti P. D.K Prianto, Fajar Achmadi Purwati Latifah, Linatri Randi Sitorus Rita Arbianti Roekmijati W. Soemantojo Roekmijati W. Soemantojo, Roekmijati W. Septian Marno Siahaan, Agustina TP Slamet Sri Amini Suryapranata, Bryan Toshiy Yonemoto Toshiy Yonemoto, Toshiy Vifki Leondo Wijanarko, A. Yuliusman Yuliusman Yuswan Muharam