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All Journal EKSAKTA: Journal of Sciences and Data Analysis Bulletin of Chemical Reaction Engineering & Catalysis Bulletin of Chemical Reaction Engineering & Catalysis
Ika Yanti
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Islam Indonesia, Jl. Kaliurang KM 14.5, Sleman, Yogyakarta, 55584
Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Materials Science & Nanotechnology

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Kinetics Study Of Au(Iii) Adsorption On Gallic Acid Intercalated Mg/Al-Hydrotalcite Ika Yanti; Sri Juari Santosa; Indriana Kartini
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 16, ISSUE 1, February 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol16.iss1.art4

Abstract

Studi kinetika adsorpsi Au(III) pada Mg/Al-Hidrotalsit (Mg/Al-HT) terinterkalasi asam galat (AG) dilakukan dengan cara interaksi antara larutan Au(III) dalam spesies AuCl4- dengan sejumlah Mg/Al-HT-AG yang disintesis melalui metode kopresipitasi langsung (direct synthesis). Parameter yang digunakan dalam penentuan kinetika adsorpsi adalah variasi waktu kontak dan untuk untuk penentuan isoterm adsorpsi dilakukan variasi konsentrasi Au(III) dengan waktu kontak optimum. Analisis kandungan Au(III) yang tidak teradsorpsi pada adsorben Mg/Al-HT terinterkalasi AG dilakukan analisis dengan AAS. Adsorpsi Au(III) oleh Mg/Al-HT terinterkalasi AG yang berlangsung pada pH 3 mengikuti model kinetika pseudo orde dua dengan konstanta laju (k) 3,798x10-4 g.mg-1.menit-1serta model isoterm adsorpsimengikuti model isoterm Langmuir dengan kapasitas adsorpsi (qmaks) 625 mg.g-1.
Co-Solvent Free Electrochemical Synthesis of Biodiesel Using Graphite Electrode and Waste Concrete Heterogeneous Catalyst: Optimization of Biodiesel Yield Wiyogo Prio Wicaksono; Sekar Asmara Jati; Ika Yanti; Prastika Krisma Jiwanti
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 1 Year 2021 (March 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.1.10310.179-187

Abstract

This study optimized a co-solvent free electrochemical method for biodiesel synthesis using graphite electrode and waste concrete heterogeneous catalyst. Various parameters were evaluated, including: applied voltage (9.6, 14.4, 19.2 V), catalyst particle size uniformity (unfiltered and filtered with 150 mesh), and reaction time (15, 30, 120, 240 min). The results obtained 100% FAME content and 78.51% of biodiesel yield that were achieved at 14.4 V within 30 min using filtered catalyst and cooking oil feedstock. However, a slight decline was observed with the use of waste cooking oil. This optimized method offers a reliable and simple condition for mass biodiesel production. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Co-Solvent Free Electrochemical Synthesis of Biodiesel Using Graphite Electrode and Waste Concrete Heterogeneous Catalyst: Optimization of Biodiesel Yield Wiyogo Prio Wicaksono; Sekar Asmara Jati; Ika Yanti; Prastika Krisma Jiwanti
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 1 Year 2021 (March 2021)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.1.10310.179-187

Abstract

This study optimized a co-solvent free electrochemical method for biodiesel synthesis using graphite electrode and waste concrete heterogeneous catalyst. Various parameters were evaluated, including: applied voltage (9.6, 14.4, 19.2 V), catalyst particle size uniformity (unfiltered and filtered with 150 mesh), and reaction time (15, 30, 120, 240 min). The results obtained 100% FAME content and 78.51% of biodiesel yield that were achieved at 14.4 V within 30 min using filtered catalyst and cooking oil feedstock. However, a slight decline was observed with the use of waste cooking oil. This optimized method offers a reliable and simple condition for mass biodiesel production. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Co-Authors Indriana Kartini Prastika Krisma Jiwanti Sekar Asmara Jati Sekar Asmara Jati Sri Juari Santosa Wiyogo Prio Wicaksono Wiyogo Prio Wicaksono