Article Per Year (5 Year)
p-Index From 2021 - 2026
2.266
P-Index
This Author published in this journals
All Journal Journal Of Chemical Process Engineering (JCPE) REACTOR : Journal of Research On Chemistry And Engineering Abdimas Altruis: Jurnal Pengabdian Kepada Masyarakat Metalurgi Jurnal Teknologi Kimia Mineral Majalah Teknik Industri Journal Of Chemical Process Engineering
Flaviana Yohanala Prista Tyassena
Program Studi Teknik Kimia Mineral Politeknik ATI Makassar
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

Published : 15 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 15 Documents
Search

 1   2 
Studi Pengaruh Konsentrasi Solvent Dan Kondisi Operasi Terhadap Persen (%) Recovery Nikel Pada Proses Atmospheric Leaching Ore Laterite Asal Morowali Dengan Asam Sulfat Tyassena, Flaviana Yohanala Prista; Prameswara, Gyan; Suherman, Ahmad Faqih
Journal of Chemical Process Engineering Vol. 8 No. 1 (2023): Journal of Chemical Process Engineering
Publisher : Fakultas Teknologi Industri - Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jcpe.v8i1.760

Abstract

Permintaan nikel di dunia meningkat seiring dengan perkembangan teknologi baterai. Penggunaan nikel sebagai bahan baku baterai dikarenakan kemampuannya dalam menghantarkan energi listrik. Bijih nikel laterit jenis limonit merupakan bijih yang keberadaannya paling banyak namun belum dimanfaatkan dengan baik. Metode yang sesuai untuk mengolah bijih nikel limonit kadar rendah adalah dengan menggunakan proses hidrometalurgi, dimana Atmospheric Acid Leaching (AAL) dianggap paling efektif dari segi energi dan recovery nikel. Penelitian ini bertujuan untuk mempelajari pengaruh konsentrasi solvent asam sulfat (0,5-2M), rasio solid (bijih nikel laterit) terhadap liquid solvent (5%-25%), dan durasi leaching (0-240 menit) terhadap recovery nikel pada proses atmospheric leaching. Hasil yang didapatkan pada penelitian menunjukkan bahwa peningkatan konsentrasi solvent dan durasi leaching meningkatkan recovery nikel yang didapatkan. Sedangkan perbandingan jumlah solid (bijih laterit) terhadap liquid (solvent asam sulfat) menurunkan nilai recovery nikel. Hasil terbaik yang didapatkan pada penelitian ini diperoleh pada konsentrasi asam sulfat 2M, dengan rasio S/L 5%, dan durasi leaching 250 menit. Persen recovery nikel terbaik yang didapatkan pada penelitian ini mencapai nilai >63%.
OPTIMIZATION OF LATERITE ORE GRINDING PROCESS USING BALL MILL WITH RESPONSE SURFACE METHOD Prameswara, Gyan; Tyassena, Flaviana Yohanala Prista; Amin, Idi; Hatimah, Husnul
Metalurgi Vol 37, No 3 (2022): Metalurgi Vol. 37 No. 3 Desember 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (788.874 KB) | DOI: 10.14203/metalurgi.v37i3.655

Abstract

Dependence and interaction between several operating conditions that affect the grinding process using a ball mill such as the number of balls, grinding duration, and rotational speed on particle size at 80% product mass (P80) and mineral liberation have been obtained in this study using a CCD (central composite design) of response surface method (RSM). The grinding process was carried out in a cylindrical ball mill with a diameter and length of 18.6 cm and 21.5 cm, respectively, as well as a steel ball with a diameter of 2.5 cm and a weight of 100 grams/ball. The optimum data for the grinding process was obtained with the smallest response value of P80. It was known that the number of balls and grinding duration have a significant effect on the reduction of the P80 value in the sample. The model that can describe the influence of process variables on the P80 value was obtained with good accuracy. The character of the mineral content of the sample was observed with the X-Ray Diffraction (XRD) pattern and the elemental concentration. Minerals that have a smaller hardness scale are easier to liberate and more exposed. The P80 value of the initial material was 1560.89 µm, while at the optimum condition the P80 grinding process was reduced to 513.29 µm.
SOSIALISASI PEMANFAATAN MINYAK JELANTAH UNTUK PEMBUATAN LILIN AROMATERAPI BAGI PELAKU USAHA IKM DI KABUPATEN WAJO Arninda, Andi; Yusuf, Andi Asdiana Irma Sari; Tyassena, Flaviana Yohanala Prista
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 8, No 1 (2025): April 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/aa.v8i1.10783

Abstract

The development of Small and Medium Enterprises (SMEs) in Indonesia continues to grow every year. In Wajo Regency, the development of SMEs is also increasing. Most SMEs use a lot of oil in their production processes. However, most of them have not utilized cooking oil from the food processing industry optimally, with many throwing it into the environment. This program was designed to enhance the awareness of SME entrepreneurs in Wajo Regency regarding the environmental hazards of cooking oil waste and its potential conversion into value-added products, such as aromatherapy candles. The initiative encompassed educational sessions, technical workshops, and live demonstrations of the candle-making process. The outcomes indicated a significant improvement in participants' understanding of waste cooking oil utilization and sustainable waste management strategies. Participants' feedback reflected an average satisfaction score exceeding 4, underscoring the program's effectiveness in delivering meaningful environmental solutions and practical benefits. Through this activity, it is hoped that not only can the participants utilize cooking oil waste in aromatherapy candles, but they can also use it in other products with added value.
PENGARUH VARIASI JENIS PEREKAT TERHADAP KUALITAS BRIKET DARI KULIT RAMBUTAN Tyassena, Flaviana Yohanala Prista; Pertiwi, Siti; Prasetia, Frabowo
JURNAL TEKNOLOGI KIMIA MINERAL Vol 4 No 1 (2025): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61844/jtkm.v4i1.946

Abstract

Permasalahan menurunnya ketersediaan bahan bakar fosil mendorong pengembangan energi alternatif berbasis biomassa, salah satunya melalui pemanfaatan limbah kulit buah rambutan sebagai bahan baku briket. Penelitian ini bertujuan untuk mengetahui pengaruh variasi jenis perekat terhadap kualitas briket yang dihasilkan dari kulit rambutan, serta mengidentifikasi perekat terbaik yang menghasilkan karakteristik fisik dan nilai kalor paling optimal. Tiga jenis perekat organik yang digunakan adalah tepung kanji, tepung sagu, dan tepung terigu, dengan rasio campuran arang kulit rambutan dan perekat sebesar 20:1. Parameter yang dianalisis meliputi kadar air, kadar abu, volatile matter, fixed carbon, dan nilai kalor, berdasarkan standar SNI 01-6235-2000.Hasil penelitian menunjukkan bahwa jenis perekat berpengaruh signifikan terhadap semua parameter yang diuji. Briket dengan perekat kanji menunjukkan performa terbaik, dengan kadar air 4,03%, kadar abu 4,90%, volatile matter 14,87%, fixed carbon  80,23%, dan nilai kalor tertinggi sebesar 5317 kal/g. Perekat kanji terbukti menghasilkan briket dengan kualitas. Oleh karena itu, tepung kanji direkomendasikan sebagai perekat paling efektif untuk produksi briket dari kulit buah rambutan.
Kinetika Leaching Ni dan Fe dari Bijih Laterit Tipe Limonite Morowali Prameswara, Gyan; Tyassena, Flaviana Yohanala Prista; Pasaribu, Monita; Febryanzha , Indhyca Novitha
REACTOR: Journal of Research on Chemistry and Engineering Vol. 3 No. 2 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v3i2.57

Abstract

Nickel (Ni) deposits are depleting, while demand for the metal is increasing. To address this problem, valuable metals such as Ni and Fe can be extracted from secondary sources such as limonite-type laterite ores. The goal of this study was to investigate the influence of leaching temperature on Ni and Fe recovery, as well as the best kinetic model to represent the leaching process of these metals. Temperature has a considerable impact on the leaching process of Ni and Fe. Increasing the temperature from 30 to 90 oC can increase the recovery of Ni by 50% and Fe by 70 %. Ni and Fe recoveries were highest at 93.21 % and 95 %, respectively. Kinetic analysis of the two metals' leaching processes was also performed. It was discovered that the diffusion process controls Ni leaching, which can be represented using the Zhuravlev kinetic model, whereas chemical reactions on the surface of the unreacted core controls Fe leaching. The activation energies for leaching Ni and Fe are 36.53 and 40.32 kJ/mol, respectively. 1930 exp ((-36.53 kJ/mol)/(R.T))t=[(1-X)-1/3)-1]2 is the kinetic equation for Ni leaching. The kinetic equation for Fe leaching is 3903 exp ((- 40.32 kJ/mol)/(R.T)t=1-(1 X)1/3.
Co-Authors Adriana, Aldina Agus, Tri Gustiany Ahmad Faqih Suherman Andi Arninda Febryanzha , Indhyca Novitha Frabowo Prasetia Gyan Prameswara Husnul Hatimah, Husnul Idi Amin Idi Amin, Idi Indhyca Novitha Febryanzha Junianti, Fitri Monita Pasaribu Nur, Muhammad Aslam Perkasa, Pandu Dwi Cahya Pertiwi, Siti Saqina, Nur Aflan Farah Suherman, Ahmad Faqih Wahab, Nur Iswanti Fadillah