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Eksergi: Chemical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 1410394X     EISSN : 24608203     DOI : https://doi.org/10.31315
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Eksergi is an open-access, peer-reviewed scientific journal that focuses on research and innovation in the fields of energy and renewable energy. The journal aims to provide a platform for scientists, researchers, engineers, and practitioners to share knowledge and advancements that contribute to sustainable development and energy transition. In addition to energy topics, the journal also accepts high-quality manuscripts related to, but not limited to, the following areas: Separation processes Bioprocesses related to food, energy, and environmental applications Wastewater treatment and resource recovery Process optimization and intensification Carbon capture, utilization, and storage (CCUS) Chemical reaction engineering and reactor design Life cycle assessment (LCA) and sustainability evaluation Process Design and Control Engineering Process Simulations Process System Engineering The journal welcomes original research articles, reviews, and short communications that demonstrate novelty, scientific rigor, and relevance to chemical engineering and interdisciplinary applications.
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 14 Documents
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Search results for , issue "Vol 20, No 2 (2023)" : 14 Documents clear
Pemanfaatan Sludge Ash Pond PT. Cirebon Electrical Power (CEP) sebagai Bahan Bakar Alternatif Agik Dwika Putra; Ilham Satria Raditya Putra; Rochim Bakti Cahyono
Eksergi Vol 20, No 2 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i2.9845

Abstract

As one of the power plants that uses coal as an energy source, PT Cirebon Electric Power (PT CEP) is committed to addressing waste problems with the 3R principle. Sludge ash ponds which is waste of the process production has the potential for alternative fuel. This study aims to evaluate the utilization of sludge ash ponds with the main target parameter in the form of calorific value. Based on proximate analysis, sludge pond ash only had a low heating value, around 210 kcal/kg, thus unbeneficial to be used as fuel directly. In order to make efficient utilization, a pyrolysis process was carried out to increase the existing heating value and was obtained at 700 – 870 kcal/kg. Generally, the standard of alternative fuel had minimum heating value of 4500 kcal/kg, therefore the blending process was carried out based on the fuel availability in the industrial site. The results of blending using coal showed that the high heating value of mixed briquette product was achieved at elevated more coal content used. By paying attention to the standard heating value, the ratio composition of ash pond to coal, 20/80 satisfy for utilization, where the heating value was around 4600 kcal/kg. The blending proses using pyrolysis char of ash pond showed un significant effect on the increasing of heating value, for example in a 40/60 ratio, the difference between the two types materials was only 210 kcal/kg. Therefore, pyrolysis pretreatment of sludge ash pond had unsignificant impact compared to the energy expended to run the process
Metode Modifikasi Membran Polietersulfon (PES) Untuk Meningkatkan Antifouling−Mini Review Modifikasi Membran Enny Nurmalasari; Hasnah Ulia; Apsari Puspita Aini; Agung Kurnia Yahya; Yunita Fahni
Eksergi Vol 20, No 2 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i2.9596

Abstract

Polyethersulfone (PES) is the most common material in various medical and water treatment applications because of its excellent mechanical and thermal properties. The hydrophobicity of polyethersulfone is considered as one of the main drawbacks because the hydrophobic surface causes a high biofouling effect on the membrane, so it has limitations in using Polietersulfon PES membrane technology. Modification of PES membranes is an important topic to be continuously developed to improve the properties of PES membranes. Membrane modifications focus on increasing the hydrophilicity, selectivity, and stability of membranes that are expected to be used commercially. Modifications were made to change the hydrophobic membrane surface into a hydrophilic membrane with good mechanical properties by introducing hydrophilic properties and functional groups to the polyethersulfone membrane surface. This review includes reviews and discussions on modifying PES membranes by mixing, coating, and grafting methods. In particular, adding functional groups to polyethersulfone is a suitable method for introducing hydrophilic properties. The addition of nanomaterials to the surface of the polyethersulfone membrane by mixing, coating, grafting, and combinations significantly increases the surface of the membrane, and all modifications affect the surface roughness of the membrane.
Pemanfaatan Karbon Aktif Kulit Pisang Kepok dan Karbon Aktif Tempurung Nipah sebagai Biosorben untuk Pengolahan Limbah Cair Laundry Ilma Fadlilah; Ayu Pramita; Nurlinda Ayu Triwuri; Heni Anggorowati
Eksergi Vol 20, No 2 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i2.9681

Abstract

The use of kepok banana peel activated carbon (AC-KPK) and nipa shell activated carbon (AC-TN) to adsorb phosphate ions in laundry waste has been successfully carried out. Characterization of activated carbon was carried out with SEM-EDX. The results of the morphological analysis showed that the pore sizes in AC-KPK and AC-TN were included in the macropore category. The elemental content of the AC-KPK adsorbent is C 74.9%; 23.6% O and 1.5% K, whereas in the AC-TN adsorbent it was observed that C elements were 70.7%; O 25.5%; K 2.0% and other elements such as Ca, Na, Mg and Cl are contained in small quantities. The optimum contact time needed by AC-KPK to adsorb phosphate ions in laundry wastewater is 15 minutes with an adsorption efficiency of 98.83%, the AC-TN adsorbent is 5 minutes with an adsorption efficiency of 99.52%, and the combination of AC-KPK&AC- TN resulted in a contact time of 5 minutes with an adsorption efficiency of 99.91%. The adsorption kinetics of phosphate ions with the three adsorbent media followed the pseudo second order model with adsorption rates for the adsorbents AC-KPK, AC-TN, and the combination AC-KPK & AC-TN respectively 3.9400 g/mg.min; -28.7119 g/mg.minute; and -10.8895 g/mg.min.
Pengaruh Suhu dan Waktu Pengeringan Pada Bioplastik dari Pati Jagung Terhadap Waktu Biodegradasi Mirra Amanda Syamsyyah; Myra Wardati Sari; Cengristitama Cengristitama; Lulu Nurdini
Eksergi Vol 20, No 2 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i2.9727

Abstract

The disposal plastic waste into the environtment is an important issue due to the natureof the origin of plastics that are difficult to decomposes naturally. Therefore, efforts are made to accelerate the degradation time by using natural polymers. Corn is one of the easily found sources of starch. Starch is one of the natural polymres that can be used for the manufacture of biodegradable plastics (bioplastics) because it is easily degradable, readily available and affordable but has shortcomings in mechanical properties and water absorption ability.The purpose of this study was to observe the effect of temperature variations 60; 70; 80 and 90°C with a drying time of 1; 2; 3 and 4 hours of biodegradation time. From this study, the best results were found at a temperature of 60°C with a drying time of 1 hour which obtained a degradation time of 5 days; average thickness 0.12 mm – 0.30 mm; the overall average water absorption is 4.04% and the average water resistance is 95.99%; tensile strength of 5.69 MPa and 5.54 MPa; elongation at break of 4% and 1.6%.

Page 2 of 2 | Total Record : 14

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