Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal International Journal of Science and Engineering (IJSE) Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan
Tjukup Marnoto
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
Fuel Grade Ethanol Production by Batch Distillation Using Ternary Components I Gusti S Budiaman; Tjukup Marnoto; Chintya Rizki Hapsari; Risqi Angga Yudha Prakosa
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Ethanol is a chemical compound whose production is abundant in Indonesia. Ethanol is also widely used in the pharmaceutical industry, cosmetics, solvents, and spiritus fuel. Pure ethanol also has a high octane rating making it suitable used to raise the octane number of the gasoline. One way that can be done to purify the ethanol is a way to shift the ternary distillation azeotrope so that its purity can reach over 99.5%. Chemicals used to raise the boiling point of water include sulfuric acid, sodium hydroxide, ethylene glycol, glycerol and citric acid at certain concentrations. Ternary components were added to the raw material alcohol 86% specified in such order to obtain increasing boiling point of water as the heavy fraction by 5 oC, 10 oC, 15 oC, 20 oC and 25 oC.The distillation process is done in batch include column packing material at atmospheric pressure. Distilled provide 99.57% up to 99.91% purity ethanol in ternary addition of sulfuric acid, 99.59% up to 99.79% in the ternary addition of sodium hydroxide, 99.55% in the ternary addition of ethylene glycol, 99.64% on a ternary addition of glycerol, and 99.42% in ternary addition of citric acid. So in this experiment only the addition of sulfuric acid ternary who can give the best results with ethanol content 99.91%.
The Characteristic of Heat Pump Dehumidifier Drier in the Drying of Red Chili (Capsium annum L) Tjukup Marnoto; Endang Sulistyowati; Mahreni Mahreni; M. Syahri
International Journal of Science and Engineering Vol 3, No 1 (2012)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.017 KB) | DOI: 10.12777/ijse.3.1.22-25

Abstract

Preservation of agricultural products have a very important to avoid the dropped of selling price when the harvest season arrives. Agricultural products are perishable because of high water content approximately 80 % which if the moisture content above 10% encourages proliferation of spoilage microorganisms in the material and cause the short shelf life. One way that has been done to preserve agricultural products such as red chili is dried using direct sunlight. Weakness of the sun drying can not reduce the water content to below 10% so spoilage microorganisms can live and breed, cause the short self life. Drying using Heat Pump Humidification Technology (HPD) is one solution to overcome the disadvantages of the direct sun drying. HPD can reduce the moisture content up to or below 10% will increase the self life and make easier to crush and to produce a chili powder. The purpose of this study to determine the appropriate mathematical model of the drying phenomena. The constant of the model equations are determined by Sum Square Error (SSE). Before being dried chilies dipped in hot water to remove the wax. PHD is used as an air dehumidifier that circulate in the dryer. Humidity difference causes the displacement of water from the chilies to dry air and lower the moisture content of chili. Moisture content of chili every 5 minutes is analyzed using gravimetric method. The results showed that the texture of the chili is very fragile with a moisture content of less than 10% and in the best conditions, the moisture content of chili is 6:35 wt%. From the research found that the appropriate model is Lewis model and the constant of the models obtained (k = 0.0056). Due to the moisture content of the product below 10 wt%, PHD can be considered as an agricultural product dryer. Keywords — Chili, drying, heat pump, hpd
Synthesis and Characterization of Nafion-SiO2 Composite Membranes as an Electrolyte for Medium Temperature and Low Relative Humidity Mahreni Mahreni; Eniya Listiani Dewi; Tjukup Marnoto; Harso Pawignyo; Purwo Subagyo; Endang Sulistyowati
International Journal of Science and Engineering Vol 2, No 2 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (398.805 KB) | DOI: 10.12777/ijse.2.2.48-53

Abstract

The weakness of the Nafion membrane as electrolyte of PEMFC associated with physical properties that is easy to shrink at temperatures above 80°C due to dehydration. Shrinkage will decrease the conductivity and membrane damage. Nafion-SiO2 composite membranes can improve membrane stability. The role of SiO2 in the Nafion clusters is as water absorbent cause the membrane remains wet at high temperatures and low humidity and conductivity remains high. The results showed the content of 2.8 wt% of SiO2 in the Nafion membrane, the conductivity of composite membrane is higher than the pure Nafion membrane that are 0.127 S cm-1 in dry conditions and 0.778 S cm-1 in wet conditions at room temperature. Compared with the pure Nafion membrane conductivity are 0.0661 S cm-1 and 0.448 S cm-1 respectively in dry and wet conditions.
EVALUASI KONSTANTA PERSAMAAN KARAKTER PHOTOVOLTAIC TYPE MULTI KRISTAL DENGAN METODE HOOKE-JEEYES Tjukup Marnoto
Eksergi Vol 10, No 1 (2010): Versi Cetak
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v10i1.7618

Abstract

Persamaan karakter arus dan voltase (I-V) dari photovoltaik, mengandung beberapa konstanta, Persamaan ini dapat berlaku umum untuk meramalkan karakter (l-V) photovoltaic, apabila nilai-nilai konstanta diketahui. Penentuan nilai-nilai konstanta dilakukan berdasarkan dari data-data elsperimen yang dilakukan dengan variasi variabel yang berpengaruh. Nilai konstanta yang sesuai didapatkan dengan membandingkan data-hasil perhitungan'dengan data eksperimen menggunakan kaedah jumlah kuadrat kesalahan (SSE) minimum, proses ini dikenal sebagai optimasi (minimasi) persamaan nonlinier multi variabel. Pada tulisan ini akan dipaparkan optimasi regresi nonlinier multi variabel, dengan metoda pencarian langsung tanpa kendala (Hooke-Jebves method) dan algoritma maupun diagram alir program metode Hooke-Jeeves. Pemrogramankomputer dilakukan dengan bantuan bahasa program Scilab. Hasil optimasi diperoleh konstanta persamaan k1: 0.0065, k2= 0.006, k3=2858173 dan k4=12960. Persamaan model maternatik ini dengan konstanta tersebut dapat mewakili karakterist k photovoltaic type multikristal.
Koefisien Perpindahan Massa pada Ekstraksi Tanin dari Putrimalu (Mimosa Pudika) Tjukup Marnoto; Gogot Haryono
Eksergi Vol 9, No 1 (2009): Versi Cetak
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v9i1.7581

Abstract

Koefisien Perpindahan Massa pada Ekstraksi Tanin dari Putrimalu (Mimosa Pudika)
GRID CONNECTED SOLAR HYDROGEN ENERGY SYSTEM Tjukup Marnoto
Eksergi Vol 10, No 1 (2010): Versi Cetak
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v10i1.7609

Abstract

Solar-Hydr-ogen energy system has been regarded æ ttre future energy system that is clean, environmental-friendly, availability of renewable energy resources and easy to transfer or deliver to the end user. The grid connected solar hydrogen energy system (GCSHES) have the capability of overcoming the problems that óccur on the grid connected power system (GCPS) when there is a black out of grid electricity. Moreover, stand alone power system (SAPS) requires batteries and larger hydrogen tank capacity is required for higher energy genèration. An experimental GCSHES has been setup and tested. The GCSHES consists of subsystems photovoltaic (PV) array with 40 PV module type multicrystalin with its capacity of 5000 Wp, inverter capacity of 6000 W, electrolyzer capacity of 19 scf/h, hydrogen tank capacity of 1500 liter and fuelcell of 500 W. The characteristics equation and maximuln power output of PV was presented The monthly efficiency and performance of PV array is 12.7% and 26% , while the efficiency and performance of inverter is 95.1% and 98%, respectively. The efficiency of electrolyzer subsystem and fuel cell is 51% and 25%, respectively. The techno economical analysis indictated that the pay back period of this system is 18 years.
Co-Authors Chintya Rizki Hapsari Endang Sulistyowati Eniya Listiani Dewi Gogot Haryono Harso Pawignyo I Gusti S Budiaman M. Syahri Mahreni Mahreni Mahreni Mahreni Purwo Subagyo Risqi Angga Yudha Prakosa