Collections of Chemical Engineering Lecturers' Paper https://library.universitaspertamina.ac.id//xmlui/handle/123456789/109 2026-04-19T11:08:52Z 2026-04-19T11:08:52Z Redondo, Ayup Riyan https://library.universitaspertamina.ac.id//xmlui/handle/123456789/11421 2024-03-19T12:55:00Z 2024-02-29T00:00:00Z

Sintesis Dan Karakterisasi MgS-RgO Untuk Aplikasi Superkapasitor Dengan Metode Hydrothermal Redondo, Ayup Riyan The addition of Magnesium Oxide (MgO) metal and also Sulfur (S) as doping materials to reduce Graphene Oxide using the hydrothermal method described in this research. Synthesis of Graphite into Graphene Oxide was carried out based on Hummer's method and MgS-rGO Synthesis used the Hydrothermal method. The characteristics of MgS-rGO were analyzed using Fourier Transform Infrared (FTIR), Raman Spectroscopy and SEM-EDX. The addition of MgO and S shows an increase in amorphous structure and the addition of chemical bonding functional groups. On the other hand, an electrochemical test was carried out in the form of Cyclic Voltammetry (CV). The addition of Mg and S can increase the specific capacitance value of rGO. CV results show the capacitance of GO and rGO is 0.028 F/g and 0.035 F/g. After being doped with MgS-rGO with a ratio of 1:4 v/v, the specific capacitance increased by 12,212 F/g.

2024-02-29T00:00:00Z Redondo, Ayup Riyan https://library.universitaspertamina.ac.id//xmlui/handle/123456789/11344 2024-03-17T15:20:20Z 2022-01-19T00:00:00Z

PRELIMINARY DESIGN OF ISOPROPANOL PLANT BASED ON NAPHTHA CRACKING PROPYLENE WITH A CAPACITY OF 50,000 TON/YEAR Redondo, Ayup Riyan Isopropanol (IPA) is commonly used as an ingredient in the production of acetone or as a final product in the form of cleaning products such as disinfectants. This plant is planned to be established in Cilegon, Banten, in 2024 with a land area of 22197 m2. The isopropanol production capacity in this plant is 50000 tons/year which operates continuously for 330 days in one year. The raw materials used in the isopropanol production process are propylene and water with the help of a catalyst in the form of Amberlyst DT. The type of reactor used is a trickle bed reactor with a conversion of 75% and the reaction takes place at a temperature of 120 °C and a pressure of 80 atm non-adiabatic and non-isothermal. The reaction is exothermic and the temperature is maintained so that cooling water is used. The utility unit required in the form of water obtained from the Cipasauran river is 156435.5 kg/hour and electricity need of 510.78 kW. The management of this plant is a Limited Liability Company (PT) with a total workforce requirement of 294 people. The working capital required is Rp 684,653,946,613.9. The economic prospect of this plant design is with Pay out Time during the year 1.36, Rate of Investment of 73.49 %, Breakeven of 19.57 %, Shutdown Point of 10.92 % of production capacity and Discounted Cash Flow of 19.96 %. From this economic review, it can be concluded that the pre-designed Isopropanol plant with a capacity of 50000 tons/year is feasible to build.

2022-01-19T00:00:00Z