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All Journal Journal of Mechanical Science and Engineering IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Jurnal Penelitian Sains JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Al-Kimia IJEMS (Indonesian Journal of Environmental Management and Sustainability) Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) IKRA-ITH ABDIMAS Jurnal Teknik Kimia Journal of Applied Materials and Technology JURNAL REKAYASA KIMIA & LINGKUNGAN Multidisciplinary Indonesian Center Journal
Susila Arita
Chemical Engineering Department Faculty Of Engineering Sriwijaya University
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Other

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Synthesis and Characterization of ZSM-5 Catalyst for Catalytic Pyrolysis of Empty Fruit Bunches Lutfia Rahmiyati; Susila Arita; Leily Nurul Komariah; Nazarudin Nazarudin; Oki Alfernando
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 2 (2019): June 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i2.72

Abstract

ZSM-5 is known as a heterogeneous catalyst in the process of petroleum cracking. Zeolite has narrow pores so it needs synthesis to form mesopore so that reactant molecules can enter the active site in ZSM-5 mesopore. In this study, mesopore formation was carried out by adding Si/Al components with a ratio of 20 derived from tetraethyl orthosilicate, aluminum isopropoxide and TPAOH template with hydrothermal process. The resulting ZSM-5 was characterized using x-ray diffraction, scanning and electron microscopy (SEM). The XRD characterization results showed that the ZSM-5 synthesized to form mesopore was seen from a fairly high peak intensity in the range at 2-theta were 8.11, 9.01°; 23.27°; 23.49°; and 24.13°. The results of this study already have the same structure as the commercial ZSM-5. Characterization of SEM-EDS showed that Si-Al and Na elements in ZSM-5 were 96.43%, 3.56% and 0% wt, respectively. With a magnification of 20000x, this cluster is quite homogeneous even though the crystallization formed is not well aggregated. This ZSM-5 catalyst will be applied to the process of biomass into bio-oil.
Analysis of Biodiesel Conversion on Raw Material Variation Using Statistical Process Control Method Winny Andalia; Irnanda Pratiwi; Susila Arita
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 1 (2019): February 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i1.35

Abstract

Biodiesel is a alternative fuel that can be obtained from vegetable oils or animal fats through transesterification reactions with alcohol. Biodiesel has numerous advantages compared to diesel oil, namely: it is a renewable energy resource, it is not toxic, and it is environmentally friendly because the raw material does not contain sulfur and low emissions. Biodiesel production is inseparable from the availability of raw materials, until now the raw materials that meet the needs of production capacity are palm oil (CPO). To overcome this problem, in this study we want to find out how much biodiesel conversion percentage if we use other raw materials such as: CPO oil, corn oil, VCO oil, and waste cooking oil. The analysis used in this study was the analysis of the use of raw materials to the value of biodiesel conversion using the Stastical Process Control (SPC) method. SPC method was used to analyze, manage, control, and improve a product and process using statistics. The objective of this study was to produce high conversion percentage biodiesel, and analyze and control the quality of research products. By having this statistical methods, it could be found errors in a study or out of control production so that further action can be taken to overcome them. In this study, it was found that the product which was outside of the control limit was biodiesel made from CPO and waste cooking oil. The results of the analysis using cause and effect diagrams could determine the causes of damage in the production process, which come from the factors of workers/humans, production machines, working methods, materials/raw materials and work environment. 
The Effect of H-USY Catalyst in Catalytic Cracking of Waste Cooking Oil to Produce Biofuel Rosmawati Rosmawati; Susila Arita; Leily Nurul Komariah; Nazarudin Nazarudin; Oki Alfernando
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 2 (2019): June 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i2.67

Abstract

The crisis in petroleum is caused by the diminishing supply of petroleum resources from nature. This phenomenon encourages researchers to continue to look for processes and methods to produce energy from other resources. One of these ways is to produce energy that can be utilized from waste, including converting waste cooking oil into biofuel. This method not only could provide a source of renewable energy, but also help resolve the issue of household waste. The process used to produce biofuel from waste cooking oil is by catalytic cracking, where waste cooking oil after pretreatment is converted into biofuel in the flow reactor with H-USY catalyst. In this research, the reaction temperatures used are 400 °C, 450 °C, 500 °C and 550 °C and reaction times are 30, 45 and 60 minutes with the mass ratio of the amount of waste cooking oil to the amount of catalyst used is 40:1 (w/w). The highest yield of liquid biofuel product was obtained at 60.98%. The use of H-USY catalyst shows that the distribution of components contained in biofuel are 28.02% of diesel products (C17 -C20), 23.96% of gasoline (C6 –C12) and 7.78% of Heavy oil (C20 >) in catalytic cracking of waste cooking oil with a reaction time of 45 minutes at a temperature of 450 °C.
Leachate Treatment of TPA Talang Gulo, Jambi City by Fenton Method and Adsorption Endi Adriansyah; Tuty Emilia Agustina; Susila Arita
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 1 (2019): February 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i1.20

Abstract

ABSTRAKLindi  adalah cairan yang ditimbulkan oleh sampah akibat masuknya air eksternal yang dapat melarutkan materi-materi terlarut, termasuk materi-materi organik hasil dekomposisi secara biologi. Lindi dari sebuah landfill (TPA) mengandung zat organik dan anorganik dalam konsentrasi yang tinggi. Dengan adanya gaya gravitasi maka lindi yang terbentuk akan bergerak ke dasar landfill (TPA) akan masuk ke dalam tanah dengan membawa bahan cemaran baik material tersuspensi maupun material terlarut yang dapat mencemari air tanah. Salah satu proses pengolahan lindi adalah dengan menggunakan reagen Fenton dan adsorpsi yang termasuk dalam teknologi Advanced Oxidation Processes (AOPs). AOPs didasarkan pada pembentukan spesies yang sangat reaktif seperti radikal hidroksil (OH•) yang efektif untuk menurunkan COD, BOD dan TSS. Penelitian ini bertujuan untuk mengolah lindi menggunakan reagen Fenton dan adsorpsi serta mempelajari rasio molar Reagen Fenton dan  waktu pengadukan terhadap penurunan COD, BOD dan TSS. Pada penelitian ini lindi diolah selama 30-120 menit. Kondisi optimum dicapai pada rasio molar 1:200, waktu pengadukan 120 menit, dan adsorpsi menggunakan karbon aktif selama 120 menit dimana penurunan COD, BOD dan TSS maksimum yang dicapai berturut-turut 95%, 95% dan 92% dengan nilai konsentrasi akhir 96 mg/L, 25,5 mg/L% dan 90 mg/L.Kata Kunci: Lindi, Reagen Fenton, AOPs, COD, BOD, TSS ABSTRACTLeachate is a liquid generated by waste due to the entry of external water that can dissolve dissolved materials, including decomposition of organic matter biologically. Leachate from a landfill (TPA) contains organic and inorganic substances in high concentrations. by gravitational force, the leachate formed will move to the bottom of the landfill (TPA) and will enter the soil by carrying contaminated material, both suspended material and dissolved material that can pollute ground water. One of the leachate treatment processes is using Fenton reagent and adsorption. Fenton method included in Advanced Oxidation Processes (AOPs) technology. AOPs are based on the formation of highly reactive species such as hydroxyl radicals (OH•) which are effective for reducing COD and BOD. This study aims to treat leachate by using Fenton reagent and adsorption. The effect of reagent Fenton molar ratio and stirring time on degradation of COD, BOD and TSS were also investigated. In this study leachate was processed for 30-120 minutes. the optimum conditions were achieved at a molar ratio of 1: 200, stirring time of 120 minutes, and adsorption using 120 minutes of activated carbon where the maximum decrease in COD, BOD and TSS achieved was 95%, 95% and 92% with a final concentration of 96 mg/L, 25.5 mg/ L and 90 mg/ L.Keywords : Leachate, Fenton Reagent, AOPs, COD, BOD, TSS
Characterization of Activated Carbon from Coal and Its Application as Adsorbent on Mine Acid Water Treatment Siti Hardianti; Susila Arita Rachman; Harminuke E.H.
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 2, No 2 (2017): June 2017
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i2.34

Abstract

Anthracite and Sub-bituminous as activated carbon raw material had been utilized especially in mining field as adsorbent of dangerous heavy metal compound resulted in mining activity. Carbon from coal was activated physically and chemically in various temperature and particle sizes. Characterization was carried out in order to determine the adsorbent specification produced hence can be used and applied accordingly. Proximate and ultimate analysis concluded anthracite has fixed carbon 88.91% while sub-bituminous 49.05%. NaOH was used in chemical activation while heated at 400-500°C whereas physical activation was conducted at 800-1000°C. Activated carbon has high activity in adsorbing indicated by high iodine number resulted from analysis. SEM-EDS result confirmed that activated carbon made from coal has the quality in accordance to SNI and can be used as adsorbent in acid water treatment.
The Characteristic of Coal Oil From Catalytic Coal Gasification Rika Damayanti; Susila Arita; Fitri Hadiah
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 2 (2019): June 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i2.59

Abstract

In this work, the catalytic gasification process of coal was studied at different operating temperatures and catalyst weights. The purpose of this study was to study the characteristics of coal oil produced through the gasification process using Nickel Molybdenum (NiMo) catalyst. The effect of adding NiMo catalyst with variations in weight of 0%, 5%, 10% and 15% for different gasification temperatures (375 – 385 °C, 430 – 440 °C, and 475 – 485 °C) were studied on coal with a calorific value of 6,400 kcal/kg. The process was done in fluidized bed reactor under atmospheric pressure and an air flow rate of 2 liters/minute was flow for 60 minutes. The results showed that NiMo is effective as a catalyst in the gasification of coal at 430 – 440 °C, the addition of 15% weight of catalysts produced coal oil with a yield of 9.35% and the composition of hydrocarbon consists of 59.75% of aromatics, 26.42% of aliphatics, and 7.34% of phenolics. Compared to coal oil without catalyst give a yield of 6.56% with 57.33% of aromatics, 17.44% of aliphatics, and 16.03% of phenolics. This showing that NiMo catalysts have a high selectivity to increase aromatic and aliphatic hydrocarbons in coal oil.
Analisis karakteristik dan potensi logam pada limbah padat fly ash dan bottom ash di PLTU industri pupuk Marwan Asof; Susila Arita; Luthfia Luthfia; Winny Andalia; Muhammad Naswir
Jurnal Teknik Kimia Vol 28 No 1 (2022): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v28i2.977

Abstract

Pembangkit Listrik Tenaga Uap di Indonesia masih didominasi menggunakan bahan bakar batubara pada boilernya. Semakin tinggi kebutuhan listrik di Indonesia akan membuat kebutuhan batubara semakin tinggi, sehingga limbah fly ash dan bottom ash yang dihasilkan akan semakin banyak. Fly ash dan bottom ash digolongkan dalam limbah B3. Pengujian menggunakan instrument analisa X-Ray Fluorescence (XRF) akan diketahui unsur-unsur dan oksida pembawa logam berat yang terkandung dalam limbah fly ash dan bottom ash. Unsur-unsur tersebut antara lain magnesium (Mg), aluminium (Al), silika (Si), posfor (P), sulfur (S), kalium (K), kalsium (Ca), titanium (Ti), vanadium (V), kromium (Cr), mangan (Mn), besi (Fe), kobal (Co), nikel (Ni), tembaga (Cu), seng (Zn), galium (Ga), arsen (As), rubidium (Rb) stronsium (Sr), itrium (Y), zirkon (Zr), argentum (Ag), europium (Eu), timbal (Pb) dalam konsentrasi yang berbeda-beda antara kandungan fly ash dan bottom ash. Beberapa oksida dominan pembawa logam berat yang terdeteksi seperti Fe2O3 sebesar 3,658% pada fly ash dan sebesar 2,237% pada bottom ash; Ag2O pada sampel fly ash kandungannya sebanyak 0,143% dan pada bottom ash sebanyak 0,01%; MnO sebesar 0,036% pada fly ash dan sebanyak 0,015% pada bottom ash serta oksida ZnO dengan kadar sebesar 0,016% pada fly ash dan 0,019% pada bottom ash.
Coal Dust Characteristics and Its Association with Air Quality in Palembang Coal Unloading Station Arie Wahyudi; Hilda Zulkifli; Susila Arita; Rico Januar Sitorus
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 7, No 3 (2022): October 2022
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v7.i3.92

Abstract

The problem of coal dust due to the accumulation and loading of coal to barges for shipping has not been studied optimally. This study aimed to investigate the characteristics of coal dust and the air quality of the three coal industries. Coal dust characteristics were tested through proximate analysis, XRD, XRF, and SEM. Meanwhile, air quality is viewed from exposure to gases that cause emissions (CO, NO2, and SO2), PM10 and TSP, humidity, and temperature. Coal dust consists of SiO2, Al2O3, and Fe2O3 as the main components with high ash. Exposure to SO2 and TSP can potentially exceed the annual threshold value.
Kinetics of Homogeneous Reaction of Potassium Methoxide Based on K2CO3 Catalyst in Transesterification of RBDPO to Biodiesel Salam, Yosirham Abdu; Komariah, Leily Nurul; Hadiah, Fitri; Arita, Susila
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.28-35

Abstract

Biodiesel production is generally catalyzed by potassium methylate or sodium methylate catalysts based on KOH and NaOH and these catalysts are still imported. The search for a cheap and effective catalyst continues to be carried out by researchers. One of the catalyst support materials currently in use involves impregnating K2CO3 with various substances, resulting in a heterogeneous catalyst. In this study, it was tried to use K2CO3 dissolved in methanol to produce a homogeneous potassium methylate catalyst. Potassium methylate-based homogeneous catalyst K2CO3-methanol is proven to have a very high function in the transesterification reaction of Refined Bleached Deodorized Palm Oil (RBDPO) into biodiesel, this is evidenced by the use of a catalyst percentage of 2% w and 30% w methanol to the weight of RBDPO resulting in an acid content in biodiesel of only 0.12% and a total glycerol of 0.124% in reaction time 3 hours, with the purity of the methyl ester in biodiesel reaching 98.80%. Meanwhile, for the calculation of homogeneous reaction kinetics, a reaction rate equation is produced where the order of the RBDPO transesterification reaction is order 2 (two) and the reaction rate constant is 0.0044.
Selective Removal of Anionic and Cationic Dyes Using Magnetic Composites Fitri, Erni Salasia; Mohadi, Risfidian; Palapa, Neza Rahayu; Susila Arita Rachman; Lesbani, Aldes
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.129-136

Abstract

Water is one of the most basic human needs, and dyes are one of the sources of water pollution. Since adsorption has proven to be effective in removing contaminants, it is the most widely used technique. In this adsorption, a LDH Zn-Al /magnetic biochar composite was used for dye removal. Zn-Al LDH, magnetic biochar, and LDH Zn-Al/biochar magnetic composite were successfully synthesized, based on XRD and FTIR studies. XRD analysis of the Zn-Al LDH material shows diffractions of (003), (006), (101), (012), (015), (107), and (110) around the 2theta angle at 10.29°, 20.07°, 29.59°, 32.12°, 34.02°, 48.06°, and 60.16° which are characteristic of LDH materials. In magnetic biochar and LDH Zn-Al/magnet biochar composites diffraction (220), (311), (422) and (440) at 2theta around 24.9°, 35°, 63° and 68.4° in these materials indicate the characteristics of carbon-based materials from biochar. FTIR analysis showed the appearance of a vibration peak at 1404cm−1 indicating the presence of C H groups contained in biochar. The characteristic double-layer hydroxy (M-O) vibrations below 1000 cm−1 also indicated that the composite preparation process had been successful. The study’s results show that cationic dyes are more easily adsorbed than anionic dyes. Specifically, the LDH Zn-Al/Magnetic Biochar composite more extensively absorbs the cationic dye malachite green.
Co-Authors Abrar Assalami Abrar Assslami Akhmad Ade Sucitro Aldes Lesbani Alisan, Cinthya Putri Alqorni, Kemas Uwais Andini, Handalia Putri Annafi, Muhammad Astuti, Syurmi Cundari, Lia Dahlan, Hatta Damayanti Damayanti David Bahrin Dede Hadi Widianto Desfaur Natalia Desyandri Desyandri Dina Irawaty Naibaho Dina Irawaty Naibaho Dwi Anggraini Endi Adriansyah Erisna, Desi Fatimura, Muhrinsyah Fitri Hadiah Fitri, Erni Salasia Fitri, Rizza Fadillah Gayatri, Rianyza Harminuke E.H. Hasbun Kosim Hermansyah Hilda Zulkifli Irnanda Pratiwi Irsan Saleh Irsan Saleh, Muhammad Ivana Liony Jalius Jalius Jalius Jalius Legiran Legiran Leily Nurul Komariah Lutfia Rahmiyati Luthfia Luthfia Marwan Asof Marwan Asof Marwani Zahri Kadir Muhammad Naswir Muhammad Naswir Muhammad Rifqi MUSTIKA FATIMAH Naswir, Muhammad Natalia, Desfaur Nurlela Oki Alfernando Oki Alfernando Poedji Loekitowati Hariani Putri, Anisyah Kamila Rahmadian, Muhammad R Rico Januar Sitorus Rika Damayanti Risa Purnama Sari Risfidian Mohadi Rosmawati Rosmawati Rully Masriatini Salam, Yosirham Abdu Saleh, Muhammad Irsan Sinta, Eis Candra Siti Hardianti Siti Miskah Tirtasakti Nugroho Tuty E. Agustina Tuty Emilia Agustina Wahyudi, Arie wahyuningsih, dwi retno Wibowo, Yudha Gusti Winny Andalia Zen, Muhammad Rizky