Ethanol dehydrogenation to acetaldehyde over activated carbons-derived from coffee residue
Copyright (c) 2018 Bulletin of Chemical Reaction Engineering & Catalysis
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Article Metrics: (Click on the Metric tab below to see the detail)
This study focuses on the production of acetaldehyde from ethanol by catalytic dehydrogenation using activated carbon catalysts derived from coffee ground residues and commercial activated carbon catalyst. For the synthesis of activated carbon catalysts, coffee ground residues were chemical activated with ZnCl2 (ratio 1:3) followed by different physical activation. All prepared catalysts were characterized with various techniques such as nitrogen physisorption (BET & BJH methods), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), CO2-TPD, NH3-TPD, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrometer (FT-IR) and thermogravimetric analysis (TGA). The dehydrogenation of vaporized ethanol was performed to test the catalytic activity and product distribution. Testing catalytic activity by operated in a fixed-bed continuous flow micro-reactor at temperatures ranged from 250 to 400°C. It was found that the AC-D catalyst (using calcination under carbon dioxide flow at 600oC, 4 hours for physical activation) exhibited the highest catalytic activity, while all catalysts show high selectivity to acetaldehyde (more than 90%). Ethanol conversion apparently increased with increased reaction temperature. At 400oC, the AC-D catalyst gave the highest ethanol conversion of 47.9% and yielded 46.8% of acetaldehyde. The highest activity obtained from AC-D catalyst can be related to both Lewis acidity and Lewis basicity because the dehydrogenation of ethanol uses both Lewis acid and Lewis basic sites for this reaction. To investigate the stability of catalyst, the AC-D catalyst showed quite constant ethanol conversion for 10 h. So, the synthesized activated carbon from coffee ground residues is promising to be used in dehydrogenation of ethanol.
Received: 2nd October 2018; Revised: 9th November 2018; Accepted: 25th November 2018
Keywords
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Authors and readers can copy and redistribute the material in any medium or format, as well as remix, transform, and build upon the material for any purpose, even commercially, but they must give appropriate credit (cite to the article or content), provide a link to the license, and indicate if changes were made. If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
Copyright Transfer Agreement
The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to Bulletin of Chemical Reaction Engineering & Catalysis journal and Department of Chemical Engineering Diponegoro University as publisher of the journal.
Copyright encompasses exclusive rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms and any other similar reproductions, as well as translations. The reproduction of any part of this journal, its storage in databases and its transmission by any form or media, such as electronic, electrostatic and mechanical copies, photocopies, recordings, magnetic media, etc., will be allowed only with a written permission from Bulletin of Chemical Reaction Engineering & Catalysis journal and Department of Chemical Engineering Diponegoro University.
Bulletin of Chemical Reaction Engineering & Catalysis journal and Department of Chemical Engineering Diponegoro University, the Editors and the Advisory International Editorial Board make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in the Bulletin of Chemical Reaction Engineering & Catalysis are sole and exclusive responsibility of their respective authors and advertisers.
The Copyright Transfer Form can be downloaded here: [Copyright Transfer Form BCREC 2016]
The copyright form should be signed originally and send to the Editorial Office in the form of original mail, scanned document or fax :
Prof. Dr. I. Istadi (Editor-in-Chief)
Editorial Office of Bulletin of Chemical Reaction Engineering and Catalysis
Department of Chemical Engineering, Diponegoro University
Jl. Prof. Soedarto, Kampus Undip Tembalang, Semarang, Central Java, Indonesia 50275
Telp.: +62-24-7460058, Fax.: +62-24-76480675
E-mail: bcrec[at]live.undip.ac.id
