Browsing by Author "Kartohardjono, Sutrasno"

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    Analysis of Energy Consumption in Chlor-Alkali Production by Using Plasma Electrolysis Process
    (2015-10-26) Bismo, Setijo; Saksono, Nelson; Abqari, Fakhrian; Kartohardjono, Sutrasno
    Chlor-alkali is one of the most important processes in chemical industry. In this study, the energy consumption on chlorine gas production by electrolysis plasma is examined. Plasma electrolysis can decrease the energy consumption up to 24 times in single compartment reactor and can reach up to 59 times in double compartment reactor compared to electrolysis process in the same reactor configuration. In reactor with single compartment, high voltage results high current that then cause high-energy consumption. The highest chlorine gas production is at 0.5 M and 300 V that results 4.63 mmol for 15 minutes with 134 kJ/mmol Cl2 energy consumption. Furthermore, in double compartment reactor, current is lower due to its higher distance between two electrodes that makes the higher resistance. The highest chlorine gas production is at 0.5 M and 700 V that results 11.25 mmol for 15 minutes with 16 kJ/mmol Cl2. The decrease of the energy can be then optimized to meet the lowest energy consumption. Further development of this study will lead to the more effective process of chlor-alkali industry application.
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    The Effect Of Initial Concentration And Ph Of Wastewater In Ammonia Removal Using Membrane Contactor In Counter-Current Mode
    (2016-04-22) Fermi, Muhammad Iwan; Muharam, Yuswan; Kartohardjono, Sutrasno
    This study shows the application of hollow fiber membrane contactor (HFMC) for ammonia removal from its solution using super hydrofobic polypropilene membrane. In this study, the waste water solution was flow in shell side while the absorbent solution in lumen fiber side in counter-current mode. Sulfuric acid (98% v/v) was used as abosrbent fluid. The HFMC module consists of 3000 fibers packed in 2-in diameter cylinder of Polyvinyl chloride (PVC) with fiber‘s efective length of 25 cm. As shown on the results of this study, super hydrofobic Polypropylene hollow fiber membrane contactor work effectively in removing ammonia from waste water. The highest ammount of ammonia that can be removed was obtained for initial concentration of 800 ppm which is 620.12 mg/L. In this study, the highest overall mass transfer coefficient is achieved at waste water pH of 12 which is 0.004 m.s-1.