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All Journal Mimbar Sekolah Dasar Biopropal Industri Chimica et Natura Acta International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Tropical Livestock Science Journal
Egi Agustian
Pusat Penelitian Kimia-LIPI, Kawasan Puspiptek Serpong 15314, Tangerang 15314
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Veterinary

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Patchouli Oil Production for Fixative Aromatheraphy: A Case Study Design of Condenser for Steam Distillation Agustian, Egi; Sulaswatty, Anny
Biopropal Industri Vol 6, No 1 (2015)
Publisher : Balai Riset dan Standardisasi Industri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.598 KB)

Abstract

Patchouli oil is an important material for aromatherapy industries and made from patchouli leaves by steam distillation. The important parts of steam distillation is condenser. The problem is process of farmers patchouli based on experience not used chemical process of steam distillation cause not effective and efficient. The study was designed of condensers on steam distillation for patchouli leaves. Specification of condenser type is shell and tube, stainless steel material and water as coolant. Tubing sized is ¼ inch with 500 mm of length and 24 pieces. Shell measuring 2.5 inch and 600 mm of length. The performance of condenser gave the efficiency at 94.51%. The process condition of ratio stems to leaves is 5:6 and 4.5 hours was considered ideal for steam distillation. The used of energy is lowest cause the efficiency condenser and yield will be higher. Patchouli oil yield of 2.39% and patchouli alcohol content is 35.65%.
GREEN SYNTHESIS OF ISOPULEGOL FROM CITRONELLAL CATALYSED BY ZEOLITE BASED SOLID ACID CATALYSTS Adilina, Indri Badria; Agustian, Egi
Chimica et Natura Acta Vol 2, No 1 (2014)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (86.685 KB) | DOI: 10.24198/cna.v2.n1.9135

Abstract

Zeolit alam (NZ) telah dimodifikasi dengan penambahan asam (H-NZ) dan diaplikasikan sebagai katalis asam padat untuk green sintesis isopulehol dari minyak sereh wangi. Sintesis ini menlibatkan reaksi siklisasi sitronelal menjai disopulegol pada suhu 50 sampai 120oC. Aktivitas katalis H-NZ terbukti lebih tinggi dari katalis H-ZSM5 yang tersedia di pasar dan lebih unggul dari katalis asam padat berbasis bentonit. Perolehan terbaik sebesar 87% isopulegol diperoleh menggunakan katalis H-NZ pada 100oC selama 3 jam tanpa penggunaan pelarut reaksi.
PENGARUH PENDEKATAN OPEN-ENDED TERHADAP KEMAMPUAN BERPIKIR KREATIF MATEMATIS SISWA SEKOLAH DASAR KELAS V Agustian, Egi; Sujana, Atep; Kurniadi, Yedi
Mimbar Sekolah Dasar Vol 2, No 2 (2015)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53400/mimbar-sd.v2i2.1333

Abstract

This research is experimental research in the research design is pretest-posttest control group design to find out the influence of open-ended approach on creative-mathematic thinking skill of student's grade V SD.  The population of this research is all student's grade V of SD considering middle-group category based on the average score on a mathematics national exam at SD/MI level in the entire Rancakalong region. Meanwhile, the samples of this research are SDN Pasirbenteng II as experimental group and SDN Pasirbiru as a control group. The instruments in this research consist of test, affective scale, observation format of teachers’ performance, observation format of students’ activities and interview. The result from this research proves that learning using the open-ended approach can significantly increase a creative mathematic thinking of student's grade V SD. It can be seen from the findings of data analysis. Based on the research, students’ response to mathematics learning using open-ended tends to show a positive response that means students have good tendency of interest and enthusiasm to the learning. Thus, it can be concluded that open-ended is one of the solutions to increase creative - mathematic thinking skill of student's grade V SD. Keywords: open-ended approach, creative-mathematic thinking skill.
Developing Elementary School Teacher Competence in Making Music Learning Media Using Scratch Application: An Action Research Julia, J.; Iswara, Prana Dwija; Gunara, Sandie; Yildiz, Yıldız Mutlu; Agustian, Egi
Mimbar Sekolah Dasar Vol 7, No 3 (2020)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/mimbar-sd.v7i3.29100

Abstract

The development of technology and information demands elementary school teachers to be able to make and teach technology-based musical instruments so that the development of technology and information can be used in the learning process. Elementary school teachers also have problems teaching musical composition using ensemble musical instruments. Teachers also lack strategies and media to teach musical instruments, so they need to have ideas for developing technology-based musical instruments. This study aims to develop the elementary school teachers’ ability to innovate and make music learning media using a computerized system. The research design used was action research. The participants were 38 teachers from nine regencies and cities in West Java, Indonesia. The results showed that the teachers were able to complete the task of making technology-based learning media which means that they were able to develop their technological abilities to make music learning media. Teachers can easily use and master the Scratch application to make music learning media. It can be concluded that with structured and controlled training, elementary school teachers can develop themselves and innovate well.
Performance of sulfided NiMo catalyst supported on pillared bentonite Al and Ti under hydrodeoxygenation reaction of guaiacol Rinaldi, Nino; Sari, Novi Liana; Sumari, S.; Kristiani, Anis; Agustian, Egi; Widjaya, Robert Ronald; Dwiatmoko, Adep
International Journal of Renewable Energy Development Vol 13, No 3 (2024): May 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60060

Abstract

Bio-crude oil is known to be sustainable, eco-environmentally, and an alternative energy source produced by biomass pyrolysis. However, its quality remains relatively low due to a higher oxygen concentration compared to liquid fuels from fossils. Therefore, an upgrading process is necessary through the catalytic hydrodeoxygenation (HDO) process. This work synthesized pillared bentonite using Al and Ti metals as the pillaring agent to produce Al-PILC and Ti-PILC as catalyst support for sulfided NiMo. Their catalytic activity in HDO reaction using guaiacol as a model compound of bio-crude oil were also evaluated. Characterization of the bentonite-pillared materials, including Al-PILC, Mo/Al-PILC, NiMo/Al-PILC, Ti-PILC, Mo/Ti-PILC, and NiMo/Ti-PILC, was performed using Surface Area Analyzer, X-ray Diffractometer (XRD), Temperature-Programmed Desorption of ammonia (NH3-TPD), X-Ray Fluorescence (XRF), and Scanning Electron Microscope (SEM) techniques. The characterization results confirm the pillarization process of bentonite using Al and Ti metals as the pillaring agent, and the preparation of the NiMo catalyst using the stepwise impregnation method was successfully prepared. The NiMo/Ti-PILC catalyst performs a superior conversion value on the HDO guaiacol reaction than other catalysts. A well dispersion of Mo and Ni metals on the surface support (NiMo/Ti-PILC), thus creating numerous active sites of the catalyst after the sulfidation. Variations in time and temperature during the HDO guaiacol reaction significantly affected the conversion.
Catalytic Performance of Cu-Ni supported on Rice Husk Ash-derived SiO2 for the Hydrogenation of Ethylene Carbonate to Ethylene Glycol Maharani, Najiah Sephia; Rahmawati, Novia Dwi; Aziz, Isalmi; Maryati, Yati; Agustian, Egi; Widjaya, Robert Ronal; Yati, Indri; Prasetyo, Joni; Rinaldi, Nino; Dwiatmoko, Adid Adep
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 1 Year 2025 (April 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20336

Abstract

Ethylene glycol, a crucial compound extensively utilized in solvents, coolants, antifreeze, polyester fiber production, and as a natural gas-drying agent, can be synthesized via the hydrogenation of ethylene carbonate. In this study, the synthesis, characterization, and catalytic performance of Cu-Ni/SiO2 catalysts for this reaction, utilizing silica (SiO2) derived from rice husk ash, were investigated. Silica was impregnated with copper (Cu) and nickel (Ni) by varying the weight ratio (Cu:Ni = 10, 7:3, 3:7, 10) to prepare bimetallic catalysts. X-ray Diffraction (XRD) analysis confirmed the presence of both Cu and Ni phases in all the catalysts. The 3Cu7Ni/SiO2 catalyst displayed the lowest reduction temperature and the largest surface area (257.97 m²/g). The 7Cu3Ni/SiO2 catalyst exhibited the highest acidity (1.91 mmol/g) and superior metal dispersion, as confirmed by the Field Emission Scanning Electron Microscopy - Energy Dispersive X-Ray (FE-SEM-EDX) analysis. Catalytic activity was evaluated in a batch reactor under 40 bar H2 pressure at 150 °C for 3 h with a catalyst-to-ethylene carbonate ratio of 5:1. Among the catalysts examined, the 7Cu-3Ni/SiO2 composition demonstrated the highest catalytic performance, achieving 15.14% conversion of ethylene carbonate and 80.51% selectivity towards ethylene glycol. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Molar Ratio Comparison of Ti-Zr as Catalyst Support of Bentonite in Esterification Reaction Firmansyah, Sanji; Agustian, Egi; Rinaldi, Nino; Widiarti, Nuni; Hanifah, Yuliza; Maisaroh, Maisaroh; Sulaswatty, Anny
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 1 Year 2025 (April 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20258

Abstract

Natural bentonite from Pacitan - Indonesia as a support in the preparation of Ti and Zr-pillared metal catalysts (Ti-Zr/bent) for esterification reaction were studied. The preparation of Ti-Zr/bent catalyst was prepared to find out the effect of molar ratios (Ti:Zr) where an investigation was performed in the esterification of waste cooking oil. The catalyst was varied as follows: 0.5:1 (Ti-Zr-1/bent), 1:1 (Ti-Zr-2/bent), 1.5:1 (Ti-Zr-3/bent), 2:1 (Ti-Zr-4/bent), and 5:1 (Ti-Zr-5/bent) were used to determine the yield. The reaction was carried out for 3 hours at 150°C and a pressure of 40 bar N2 gasses. The result of the Ti-Zr/bent catalyst was given increasing significantly for surface area of 133–147 m²/g compares to bentonite 27 m²/g and 10 times of acidity. The best catalyst was shown in 2:1 of ratio Ti:Zr (molar) on esterification reaction with succesfuly performed about 80.40% of yield. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Strategi Penguatan Kinerja Kelompok Usaha Ternak Sapi Perah Agustian, Egi; Indah Laela Rahmah, Ulfa; Adam Yuliandri, Lili
Tropical Livestock Science Journal Vol. 3 No. 2 (2025): April 2025
Publisher : Study Program of Animal Husbandry, Faculty of Agricultural, Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/tlsj.v3i2.13087

Abstract

This research was conducted in Girimulya Village, Banjaran District, Majalengka Regency from June 5 to July 5, 2024. This study aims to analyze the internal and external environmental conditions of the group and analyze the group's strengthening strategy in improving the dairy cattle business in the Mekar Mulya Farmer Group. The research method is a survey, the data collection technique in this study was by observation, interviews and recording of the administrators and members of the group as many as 37 respondents. The results of this study indicate that the results of the identification of the internal and external environment of the group obtained a large internal strength factor, namely partners in milk marketing with a value of 0.416 and the lowest internal weakness was not making processed products from milk raw materials with a value of 0.168. The largest external opportunity factor is assistance from the government with a value of 0.325, while the lowest threat is the existence of similar groups in the area with a value of 0.106. The results of the IFE analysis on the group showed a total score of 2.841 and the results of the EFE analysis showed a total score of 2.099. The IE Matrix of the Mekar Mulya Farmers Group occupies a position in cell V, which means guard and maintain.
Bio-briquettes from tea fluff biochar: a response surface methodology study on particle size, resin gum-adhesive, and used cooking oil immersion time Suryajaya, Suryajaya; Agustian, Egi; Haryanti, Ninis Hadi; Prasetia, Hafiizh; Rahmah, Siti; Kurniawan, Hendris Hendarsyah; Wianto, Totok; Ramadhoni, Benni F; Manik, Tetti Novalina; Annisa, Nova; Rezamela, Erdiansyah; Sulaswatty, Anny
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60877

Abstract

Fluff tea is the residual solid waste generated in the green tea industry and holds the potential for development as a solid fuel in bio-briquettes. This study transformed fluff tea into bio-briquettes utilizing biochar produced through slow pyrolysis. The study aimed to optimize bio-briquettes production from fluff tea using the Response Surface Methodology (RSM) approach through proximate analysis. The cylindrical bio-briquettes were produced using biochar particle sizes of 850, 500, and 150 μm, resin gum adhesive concentrations of 10%, 15%, and 20%, and immersion times in cooking oil of 0, 3, and 6 minutes. The results showed that the overall response by the p-value was <0.05, and the lack of fit was insignificant (p-value >0.05). The findings indicated that the calorific value of tea fluff rose from 4,482.56 cal/g to 6,374.98 cal/g after conversion to biochar. The optimum conditions for producing tea fluff bio-briquettes were a particle size of 850 μm, adhesive concentration of 11%, and immersion time of 5 minutes. The bio-briquettes exhibited a moisture content of 3.53%, ash content of 5.65%, volatile matter of 14.75%, fixed carbon of 76.14%, calorific value of 7,796.37 cal/g, combustion rate of 0.11 g/min, density of 1.22 g/cm3, and compressive strength of 35.57 N/cm2. Most tea fluff briquettes' properties had met Indonesia's briquettes standard. The production of bio-briquettes from tea fluff waste is a viable alternative fuel for both industrial and domestic applications.
Co-Authors Adam Yuliandri, Lili Anis Kristiani, Anis Anny Sulaswatty, Anny Atep Sujana Dwiatmoko, Adep Dwiatmoko, Adid Adep Erdiansyah Rezamela, Erdiansyah Firmansyah, Sanji Hafiizh Prasetia, Hafiizh Hanifah, Yuliza Hendris Hendarsyah Kurniawan, Hendris Hendarsyah Indah Laela Rahmah, ulfa Indri Badria Adilina Isalmi Aziz Joni Prasetyo, Joni Julia, J. Maharani, Najiah Sephia Maisaroh Maisaroh Manik, Tetti Novalina Ninis Hadi Haryanti, Ninis Hadi Nino Rinaldi Nova Annisa, Nova Novia Dwi Rahmawati Nuni Widiarti Prana Dwija Iswara, Prana Dwija Ramadhoni, Benni F sandie gunara, sandie Sari, Novi Liana Sembiring, Rinawati Sumari, S. Suryajaya Suryajaya, Suryajaya Totok Wianto Widjaya, Robert Ronal Widjaya, Robert Ronald Yati Maryati yati, indri Yedi Kurniadi, Yedi Yildiz, Yıldız Mutlu