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All Journal Jurnal Ilmu Lingkungan Journal of Engineering and Technological Sciences REKAYASA IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Sriwijaya International Seminar on Energy-Environmental Science and Technology Science and Technology Indonesia AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Al-Kimia IJEMS (Indonesian Journal of Environmental Management and Sustainability) IKRA-ITH ABDIMAS Journal of Humanities and Social Studies Jurnal Teknik Kimia Science Midwifery Journal of Applied Materials and Technology Jurnal Pengabdian Masyarakat Farmasi : Pharmacare Society Jurnal Pengabdian Kolaborasi dan Inovasi IPTEKS Bulletin of Chemical Reaction Engineering & Catalysis
Fitri Hadiah
Chemical Engineering Department, Faculty Of Engineering, Universitas Sriwijaya, Ogan Ilir, South Sumatera, 30862, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary

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Catalytic Transfer-Hydrogenation of Fatty Oil Fitri Hadiah
Sriwijaya International Seminar on Energy-Environmental Science and Technology Vol 1, No 1 (2014)
Publisher : Sriwijaya International Seminar on Energy-Environmental Science and Technology

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

Abstract

Polyunsaturated fatty acids are the main cause of the poor thermal and oxidative stabilities of fatty oils as well as biodiesels. The conversion of polyunsaturated to monounsaturated fatty acid moieties are normally carried out via hydrogenation. The most conventional hydrogenation process uses gaseous hydrogen at relatively high temperature and pressure in the presence of metal catalysts. Catalytic-transfer hydrogenation is an alternative method for oil hydrogenation which does not require the presence of hydrogen and can be carried out at atmospheric pressure. This paper describes the catalytic transfer-hydrogenation of kapok seed oil (Ceiba pentandra) and candlenut oil (Aleurites moluccana) by potassium formate (KOOCH) solutions using the following catalysts: Ag–Cu2O, Ag–Cu2O/Pumice, Ag–Cu2O–Pd/Pumice, and Pd/C 5%. None of the catalysts were found effective and kapok seed oil hydrogenated using 5%-Pd/C catalyst turned into gel, most probably due to the polymerization reactions of sterculic and malvalic acid
Pengaruh konsentrasi inisiator kalium persulfat dan monomer asam akrilat terhadap persen grafting karet alam/starch Tuti Indah Sari; Fitri Hadiah; David Bahrin; Tri Julieta Putri; Rizka Amanda
Jurnal Teknik Kimia Vol 29 No 1 (2023): 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.v29i1.1450

Abstract

Modifikasi karet alam menggunakan pati (starch) dilakukan untuk meningkatkan kualitas karet alam serta meningkatkan kekuatan mekanis. Pati termasuk polimer yang sering dikembangkan dengan monomer atau beberapa polimer, karena memiliki sifat kekuatan tarik yang tinggi. Modifikasi karet alam menggunakan pati dilakukan dengan menambahkan kalium persulfat sebagai inisiator dan asam akrilat sebagai monomer. Penelitian ini dilakukan untuk mengetahui pengaruh konsentrasi inisiator dan monomer terhadap persen grafting karet alam/starch, spektrum karet alam/pati dengan asam akrilat, dan morfologi hasil grafting karet alam dengan membandingkan pati termodifikasi dan tak termodifikasi. Variasi konsentrasi inisiator kalium persulfat yang digunakan berkisar 1 – 3%, sedangkan variasi jumlah monomer asam akrilat berkisar 22 – 30%. Hasil penelitian menunjukkan nilai persen grafting tertinggi yaitu pada konsentrasi inisiator 3% yaitu sebesar 58,28%, sedangkan variasi monomer menunjukkan hasil optimum pada penambahan monomer 28% dari pati yaitu 45,94%. Hasil Fourier Transform Infrared (FTIR) pada sampel menunjukkan munculnya peak pada panjang gelombang sekitar 1244,78 cm-1 yaitu gugus C-O-C yang menandakan adanya senyawa pati serta panjang gelombang sekitar 1739,62 cm-1 yaitu gugus C=O yang menandakan adanya asam akrilat. Morfologi sampel grafting karet alam dengan pati termodifikasi menunjukkan hasil yang lebih baik dibandingkan pati tak termodifikasi.
Produksi Asap Cair dari Limbah Kopi di Desa Karang Tanding Kecamatan Jarai Kabupaten Lahat Bazlina Dawami Afrah; M Ihsan Riady; Tuti Indah Sari; Fitri Hadiah; Novia Sumardi; Siti Istiani Pratiwi; Ahmad Julianto; Agung Dwi Aryansyah
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 7 No 3 (2023): Agustus
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v7i3.9101

Abstract

Komoditas kopi merupakan salah satu komoditas andalan yang memberikan kontribusi besar bagi pendapatan nasional. Tanaman kopi selain menghasilkan produk utama berupa biji kopi juga menghasilkan limbah berupa batang dan kulit buah kopi yang memiliki potensi bahan untuk pembuatan asap cair untuk pengganti pestisida sintetik dan penggumpal lateks. Pelaksanaan kegiatan edukasi dan pelatihan pemanfaatan limbah tanaman kopi menjadi asap cair sebagai bahan pestisida sebagai bentuk pengabdian kepada masyarakat Desa Karang Tanding menjadi alternatif untuk meningkatkan pemahaman masyarakat tentang produk ekonomis yang berasal dari limbah tanaman kopi. Kegiatan ini disambut oleh 1.146 orang yang mayoritas mata pencahariannya di sektor perkebunan. Pemanfaatan limbah kopi melibatkan masyarakat dan mahasiswa termasuk penyiapan materi dan pengolahan lanjutan dengan protokol COVID-19 yang direkomendasikan. Kegiatan selanjutnya merupakan sosialisasi penggunaan alat yang diikuti ± 20 masyarakat dengan harapan masyarakat dapat mengedukasi masyarakat lain dan mengaplikasikan langsung pada perkebunan desa Karang Tanding seluas ± 400 Ha. Produk asap cair yang dihasilkan dengan pemurnian asap cair dapat menghasilkan peptisida alami yang aman bagi sektor perkebunan.
Biodiesel production with DES (deep eutectic solvent) catalyst using used cooking oil feedstock through two-stage transesterification process Fitri Hadiah; Nur Kemala Debi Lestari; Mughni Ayahanda Putri; Budi Santoso; Rahmawati Rahmawati
Jurnal Teknik Kimia Vol 30 No 1 (2024): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya in collaboration with Asosiasi Pendidikan Tinggi Teknik Kimia Indonesia (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v30i1.2308

Abstract

Most of biodiesel in Indonesia is still produced by costly processed utilizing pricey catalysts and high grade fatty acid methyl esther (FAME). Low cost catalysts need to be invented in order to make biodiesel more affordable, while raw material also need to be obtained from low cost alternatives. such as broadly available waste cooking oil.This research used waste cooking oil as raw material in biodiesel transesterification process, utilizing DES (Deep Eutectic Solvent) K2CO3-gliserol, as alternative catalyst. The output was biodiesel with near SNI 7182:2015 criteria. Optimum biodiesel production was achieved in low 65 oC temperature while utilizing two step transesterification process using DES K2CO3-gliserol 5.5 % and 35 % methanol, whereas glycerol total was 0.32 % and methyl esther contain was 96.89 %.
Extraction of K2CO3 from empty palm fruit bunch ash and properties analysis Cindi Pakpahan; Susila Arita; Tuti Indah Sari; Leily Nurul Komariah; Fitri Hadiah; Nino Renaldi
Jurnal Teknik Kimia Vol 30 No 1 (2024): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya in collaboration with Asosiasi Pendidikan Tinggi Teknik Kimia Indonesia (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v30i1.2355

Abstract

Empty oil palm fruit bunches (EPFB) are the largest solid waste generated from palm oil mills. Accounting for 21-23 % of the total fresh fruit bunches. EFB ash contains K (Potassium) which can be recovered as K2CO3 through extraction. This research aims to recover K2CO3 from empty oil palm fruit bunches (EPFB) as a catalyst raw material because it is alkaline using the K2CO3 extraction method from the ash of empty oil palm fruit bunches (EPFB), which begins with a combustion process at a temperature of 700 oC to obtain ash. Ash extraction was carried out in 2 stages using water as a solvent. The K2CO3 yield from empty palm fruit bunch ash reached 57.28 %. The alkalinity test showed that the K2CO3 content in the solid extract reached 85.91 %. The properties of the ash and K2CO3 produced were analyzed using XRF, XRD and FTIR. The results of XRF analysis show that the potassium content in the ash contains the element K (potassium) which is quite large, namely 71.24 % and after extraction the purity of potassium oxide reaches 97.08 %. XRD analysis of the results of the synthesis of potassium carbonate from empty oil palm fruit bunches showed that the intensity of the material beam was obtained in a 2ϴ pattern which was lower than the intensity pattern of pure potassium carbonate. The results of FTIR analysis show that the spectrum of carbonate ions from the EPFB C-O bend is visible at 1359,879 and 700.75 cm-1 and these results are similaire to the pure carbonate ion vibration mode.
Computational Fluid Dynamics Modeling of Fermentation Reactions in Bioethanol Fermentor: A Review Wijaya, Ali Satria; Novia, Novia; Hadiah, Fitri
Journal of Applied Materials and Technology Vol. 4 No. 2 (2023): March 2023
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.4.2.79-89

Abstract

Bioethanol is a renewable energy source that can replace fossil fuels. The advantages in terms of economy and its impact on the environment make bioethanol was chosen as a biofuel. Bioethanol can be produced from various types of biomasses with the help of microorganisms, namely yeast, for the fermentation process. In manufacturing, factors including temperature, concentration, pH, fermentation time, and stirring speed influence the fermentation process. Computational Fluid dynamics (CFD) package can be applied to observe the procedures in a fermenter. CFD simulates fluid movement, energy transport, chemical reactions, and other phenomena with the aim of clarifying their impact on the overall effectiveness of bioethanol production. In this journal, a review of the fermentation process with CFD modeling was made to look at the parameters and phenomena during the bioethanol production process. The analysis commences with an examination of the processes involved in bioethanol production and underscores the crucial role of fermentation in transforming renewable resources into bioethanol. Subsequently, it delves into the foundational principles of CFD and how they are incorporated into the modeling of bioethanol fermenters. Furthermore, the review highlights key advancements and innovations in CFD modeling techniques, such as multiphase models, turbulence modeling, and coupled simulations, aiming to capture the intricate interplay of physical and biological phenomena within fermentors. Insights into the impact of operating conditions, reactor design, and microbial behavior on bioethanol yield and quality are discussed, providing a comprehensive understanding of the complex system dynamics.
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.
Conversion of Isopropanol to Diisopropyl Ether over Cobalt Phosphate Modified Natural Zeolite Catalyst Hasanudin, Hasanudin; Asri, Wan Ryan; Rahmawati, Rahmawati; Riyanti, Fahma; Maryana, Roni; Al Muttaqii, Muhammad; Rinaldi, Nino; Hadiah, Fitri; Novia, Novia
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20144

Abstract

This study aims to produce diisopropyl ether (DIPE) via isopropanol dehydration using cobalt-phosphate-supported natural zeolite catalysts. The catalytic activities of the zeolite/CoO and zeolite/Co(H2PO4)2 were compared. The as-prepared catalysts were assessed using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy, and N2 adsorption-desorption. Surface acidity was determined using the gravimetric method with pyridine as the probe. The results of this study showed that natural zeolite was favorably impregnated by CoO and Co(H2PO4)2 species. The impregnation process affected the textural and acidic features of the catalysts. The zeolite/Co(H2PO4)2 catalyst with a loading of 8 mEq.g-1 exhibited the highest surface acidity of 1.827 mmol.g-1. This catalyst also promoted the highest catalytic activity towards isopropanol dehydration, with an isopropanol conversion of 66.19%, DIPE selectivity, and yield of 46.72% and 34.99%, respectively. The cobalt phosphate species promoted higher catalytic activity for isopropanol dehydration than the CoO species. This study demonstrated the potential of cobalt phosphate-supported natural zeolite catalysts for DIPE production with adequate performance. Copyright © 2024 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).
Transesterification Process of Biodiesel with Potassium Glycerolate Catalyst Erisna, Desi; Arita, Susila; Hadiah, Fitri
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 1 (2024): February 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i1.1

Abstract

The synthesis of potassium glycerolate catalyst from DES (Deep Eutectic Solvent – K2CO3-glycerol) catalyst was carried out by heating process with various temperatures. The resulting catalyst product was analyzed and the characteristics of the best potassium glycerolate catalyst had conductivity 4482 microsiemens/cm, density 1.4858 g/cm3, Viscosity 121.574 cP, Freezing Point -8 celcius and pH 14. The best temperature in the manufacture of potassium glycerolate catalyst was at 150 celcius Alkaline pH is the main requirement to be a catalyst in the transesterification reaction. The trial results for the conversion of RBDPO to biodiesel with the optimum weight percent ratio of potassium glycerolate catalyst to RBDPO were 3.5%w, methanol 30%w, reaction temperature 65 celcius, reaction time 4 hours resulted in total glycerol content in biodiesel 0.2285%, acid value 0.15%, density 0.8705 gr/cm3, viscosity 5.22 Cst, conversion 96.77% and 97.81% methyl ester content and all of these parameters all meet the biodiesel standards set by SNI-7182: 2015. Keywords: Catalyst Characteristics, Potassium Glycerolate, Transesterification, Biodiesel
Refining Used Cooking Oil Using Tapioca Starch (Manihot esculenta) and Lime (Citrus aurantifolia) Hadiah, Fitri; Alisya, Rona; Fitriyani, Della
Rekayasa Vol 17, No 3: Desember, 2024
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v17i3.27560

Abstract

Used cooking oil is cooking oil that has been used multiple times, leading to decreased in quality. This decline in quality occurs due to the degradation of the cooking oil's components. The community, especially traders, prefers to use used cooking oil or reuse cooking oil multiple times because it is more profitable than using fresh cooking oil. Using this used cooking oil can cause cholesterol issues in the body. This research aims to refine used cooking oil using carbon-rich tapioca starch and antioxidant-rich lime which is expected to restore the quality of used cooking oil. This research uses the experimental method by varying the mass of the adsorbent, specifically the ratio of tapioca starch mass at 5%, 10%, and 15%, and the lime mass ratio at 5%, 10%, 15%, and 20%. The used cooking oil refining process was conducted by mixing used cooking oil and adsorbents for one hour at a speed of 200 rpm and then allowed to stand for 2 days. This research aims to study the effect of the amount of tapioca starch and lime as adsorbents on the viscosity, density, and acid number of refined used cooking oil. The optimal use of adsorbent is 20% tapioca starch and 10% lime, resulting in a density of 0.9760 g/cm³, viscosity of 18.9452, and an acid number of 2.8719 mg KOH/gram oil.
Co-Authors Agung Dwi Aryansyah Ahmad Julianto Al Azhar Al Muttaqii, Muhammad Alisya, Rona Anugrah, Muhammad Risky Aryani, Mentari Dian Aryansyah, Agung Dwi Asri, Wan Ryan Azhari, M. Thohir Azhari, Muhamad Thohir Bazlina Dawami Afrah Budi Santoso Cindi Pakpahan Cundari, Lia David Bahrin Dwi Anggraini Dwi Budi Santoso Eddy Ibrahim Erisna, Desi Fahma Riyanti Fitri, Rizza Fadillah Fitriyani, Della Fitriyanti, Reno Gayatri, Rianyza Hasanudin Hasanudin Heryanto Heryanto Ilmiaty, R. Silvia Julianto, Ahmad Leily Nurul Komariah Leily Nurul Komariah Maryana, Roni Mughni Ayahanda Putri Muhammad Rico Ghozali Muhammad Rifqi Muhammad Said Nakashima, Mhika Nino Renaldi Nino Rinaldi Novi Anggraini Novia Novia Novia Sumardi Novia Sumardi Nur Kemala Debi Lestari Pratiwi, Siti Istiani Putri, Tiara Maharani Ramona R. M. Yusuf Agustria Rahmadian, M. Rafly Rahman, Susila Arita Rahmawati Rahmawati Rahmawati, Rahmawati Riady, M.I. Rika Damayanti Rizka Amanda Salam, Yosirham Abdu Salsabilla A Yani Saputri, Jasmine Fadhilah Delli Shailendra, F. Habib Shailendra, Faris Habib Shean, Rizqi Akbar Sinaga, Andi Parluhutan Siti Istiani Pratiwi Susila Arita Susila Arita Tanjung, Anggi Anggreini Tine Aprianti Tirtasakti Nugroho Tri Julieta Putri Tri Meliasari Tuti Emilia Agustina Tuti Indah Sari, Tuti Indah Tuty E. Agustina Tuty Emilia Agustina Wijaya, Ali Satria Yadi Utama Yani, Septi Nanda Yuniarti, Hafizhah