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All Journal International Journal of Applied Technology Research Makara Journal of Technology
Muhammad Idrus Alhamid, Muhammad Idrus
Universitas Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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High Pressure Adsorption Isotherm of CO2 on Activated Carbon using Volumetric Method Martin, Awaludin; Suryawan, Bambang; Alhamid, Muhammad Idrus; Nasruddin, Nasruddin
Makara Journal of Technology Vol. 14, No. 2
Publisher : UI Scholars Hub

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High Pressure Adsorption Isotherm of CO2 on Activated Carbon using Volumetric Method. Adsorption system is ones of the most effective methods for CO2 separating with other substances that produced from the burning of fossil fuels. In the design for that application, beside of characteristics of porous material (adsorbent) data, CO2 adsorption data on the adsorbent (kinetic and thermodynamic) are also needed. The aim of this research is resulting isothermal adsorption data at pressures up to 3.5 MPa by indirect methods (volumetric method) at isothermal temperature of 300, 308, 318 and 338 K. Adsorbent that used in this research is activated carbon made from East of Kalimantan coals by physical activation method (CO2) which is the surface area of activated carbon is 668 m2/g and pore volume is 0.47 mL/g. Carbon dioxide (CO2) that used in this research is high purity carbon dioxide with a purity of 99.9%. Data from the experiment results then correlated using the Langmuir and Toth equations model. The results showed that the maximum adsorption capacity is 0.314 kg/kg at 300 K and 3384.69 kPa. The results of regression of experiment data using Langmuir and Toth models were 3.4% and 1.7%.
Characteristics of Vacuum Freeze Drying with Utilization of Internal Cooling and Condenser Waste Heat for Sublimation Alhamid, Muhammad Idrus; Yusuf, Nasruddin; Mahlia, Indra Teuku Meurah; Kosasih, Engkos Ahmad; Yulianto, Muhamad; Ricardi, Rio
Makara Journal of Technology Vol. 17, No. 2
Publisher : UI Scholars Hub

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Vacuum freeze drying is an excellent drying method, but it is very energy-intensive because a relatively long drying time is required. This research investigates the utilization of condenser waste heat for sublimation as a way of accelerating the drying rate. In addition, it also investigates the effect of internal cooling combined with vacuum cooling in the pressure reduction process. Jelly fish tentacles were used as the specimen, with different configurations for condenser heat waste and internal cooling valve opening. The results show that heating with condenser heat waste can accelerate the drying rate up to 0.0035 kg/m2.s. In addition, pre-freezing by internal cooling prevents evaporation until the mass of the specimen is 0.47 g and promotes transition of the specimen into the solid phase.
Comparative Analysis of the Performance of the Thermal Pasteurization System Using Ohmic Heating Method with an Electric Heater on Mango Puree kurniawan, yudhy; Wardika, Wardika; Sugara, Ferry; Alhamid, Muhammad Idrus; Ardiyansyah, Ardiyansyah
Jurnal Internasional Penelitian Teknologi Terapan Vol 5 No 1 (2024): February 2024
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i1.146

Abstract

This study explains the comparative analysis of performance in the thermal pasteurization system of the ohmic heating method with the electric heater in mango puree. The goal is to find out which thermal pasteurization method is better and more efficient. The method used for this study is to compare the two thermal pasteurization methods from the performance obtained, heating time, electrical power and electricity consumption costs. In the pasteurization process, the product is heated not exceeding 70 oC in the ohmic tube with an electric current on an electrode with a thickness of 4 mm attached to the end of the ohmic tube, while pasteurization of the product electric heater is heated in a double jacket tube equipped with an electric heater. The results of the analysis were obtained for the ohmic heating method the efficiency value was 78%, while for the method with an electric heater the efficiency value was 4%, the heating time of the ohmic heating method is 555 seconds, while the heating time of the electric heater method is 1500 seconds, for electric power in the ohmic heating method is 224.59 watts, while in the electric heater method an electric power of 1730.2 watts is obtained, and the cost of electricity consumption of the ohmic heating method is Rp.1,498.33,-/month, while the electric heater method costs electricity consumption of Rp.31,407.26,-/month.
Co-Authors Agus S. Pamitran, Agus S. Ardiyansyah Ardiyansyah Awaludin Martin Bambang Suryawan, Bambang Engkos A. Kosasih, Engkos A. Ferry Sugara, Ferry Haslinda Mohamed Kamar, Haslinda Mohamed Kasni Sumeru Kosasih, Engkos Ahmad Lemington Lemington, Lemington Mahlia, Indra Teuku Meurah Muhamad Yulianto Nasruddin Nasruddin Nasruddin Yusuf, Nasruddin Nazri Kamsah, Nazri RA. Koestoer Rio Ricardi, Rio Sentot Novianto, Sentot Wardika, Wardika Yudhy Kurniawan, Yudhy