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Technoeconomic Analysis of Integrated Bioethanol from Elephant Grass (Pennisetum purpureum) with Utilization of Its Residue and Lignin Safaat, Muhammad; Wulan, Praswasti Pembangun Dyah Kencana
Industria: Jurnal Teknologi dan Manajemen Agroindustri Vol 11, No 1 (2022)
Publisher : Department of Agro-industrial Technology, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.industria.2022.011.01.7

Abstract

Abstract Bioethanol has been developed as an alternative biofuel. Elephant grass is one of the lignocelluloses that can be used as a source of bioethanol. The bioethanol fermentation process should be improved along with its economic competitiveness to promote its wider application. This study aims to investigate and to evaluate the best scheme of biethanol (standalone) and the combination of bioethanol and its by-products through technoeconomic analysis. The method used is collecting data from several previous studies and simulating it with SuperPro Designer. Data from flowsheeting simulation is used as economic simulation data using Microsoft Excel. The results of this study indicate that the processing of biogas and lignin waste as fuel and lignosulfonates can increase the economic value of the bioethanol production process. The best economic value is the bioethanol production process using biogas and lignin as fuel for a Biomass Power Plant which is called Pembangkit Listrik Tenaga Biomassa (PLTBm) with a Net Present Value (NPV) of IDR 364,358,976,036, Internal Rate of Return (IRR) 11.32%, Pay Back Period (PBP) 7.2 years, and Profitability Index (PI) 1.08Keywords: bioethanol, biogas, elephant grass, lignosulfonate, SuperPro Designer AbstrakBioetanol telah dikembangkan sebagai bahan bakar nabati alternatif. Rumput gajah merupakan salah satu lignoselulosa yang dapat digunakan sebagai sumber bioetanol. Proses fermentasi bioetanol harus ditingkatkan seiring daya saing ekonomi untuk mempromosikan penerapannya yang lebih luas. Tujuan studi ini adalah untuk menginvestigasi dan mengevaluasi skema terbaik bietanol (standalone) serta kombinasi bioetanol dan produk sampingnya melalui analisis teknoekonomi. Metode yang digunakan ialah melakukan pengumpulan data dari beberapa penelitian sebelumnya dan disimulasikan dengan SuperPro Designer. Data dari simulasi flowsheeting digunakan sebagai data simulasi ekonomi menggunakan Microsoft Excel. Hasil studi ini menunjukan bahwa pengolahan biogas dan limbah lignin sebagai bahan bakar dan lignosulfonat dapat meningkatkan nilai ekonomi dari proses produksi bioetanol. Nilai ekonomi yang paling baik adalah proses produksi bioetanol dengan pemanfaatan biogas dan lignin sebagai bahan bakar Pembangkit Listrik Tenaga Biomassa (PLTBm) dengan nilai Net Present Value (NPV) Rp 364.358.976.036-; Internal Rate of Return (IRR) 11,32%, Pay Back Periode (PBP) 7,2 tahun, serta Profitability Index (PI) 1,08.Kata kunci: bioetanol, biogas, lignosulfonate, rumput gajah, SuperPro Designer 
EVALUATING ACETONE AND METHANOL FOR ELECTROPHORETIC DEPOSITION OF SS 316L COATED WITH HYDROXYAPATITE/MULTIWALLED CARBON NANOTUBES DENTAL IMPLANTS: A FOCUS ON CORROSION RESISTANCE Valmelina, Ersyi Arini; Wulan, Praswasti Pembangun Dyah Kencana; Whulanza, Yudan; Adin, Mehmet Şükrü
Jurnal Kimia Riset Vol. 9 No. 1 (2024): June
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v9i1.56784

Abstract

Dental implants offer a reliable solution for replacing damaged tooth roots. This research investigates the comparative performance of acetone and methanol as suspension media in the fabrication of stainless steel type 316L-based dental implants using the Electrophoretic Deposition (EPD) method, a technique known for its simplicity and cost-effectiveness. Voltage variations of 20V, 30V, and 40V were applied to both acetone and methanol suspensions for a duration of 20 minutes. The morphology of the Hydroxyapatite/Multiwalled Carbon Nanotube (HA/MWCNT) coatings was meticulously characterized using Scanning Electron Microscopy (SEM). Corrosion resistance was evaluated through Potentiodynamic Polarization (PDP) and Electrochemical Impedance Spectroscopy (EIS) techniques. Remarkably, at 30V, a homogeneous and crack-free coating was achieved, demonstrating superior corrosion resistance. This was further corroborated by the resistance values of 23.891 Ω and 114.990 Ω for the acetone and methanol samples, respectively. Additionally, the corrosion rates of 0.075 (mmpy) and 0.0004 (mmpy) for the acetone and methanol samples further emphasized the superiority of methanol as a suspension medium. These findings unequivocally establish methanol as the optimal choice for achieving superior deposition quality and corrosion resistance in the context of the EPD method for stainless steel type 316L-based dental implants.