Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 47, Issue 78, Pages 33239-33258Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.07.236
Keywords
Glycerol; Steam reforming; Hydrogen; Co-based catalyst; Catalyst screening; Stability tests
Categories
Funding
- Associate Laboratory in Chemical Engineering (ALiCE) [LA/P/0045/2020]
- Biotechnology and Energy (LEPABE) - national funds through the FCT/MCTES (PIDDAC) [UIDB/00511/2020-UIDP/00511/2020]
- German Federal Ministry of Economics and Energy (BMWi) [KF2031911ZG2]
- Leibniz Society
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BD/137106/2018]
- Ministry of Science, Technology and Higher Education
- European Social Fund (ESF) through the Human Capital Operational Programme (POCH)
- FCT
- Scientific Employment Support Program [DL 57/2017]
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A comparative study of Co-based catalysts supported on La2O3, AlZnOx and AlLaOx for glycerol steam reforming was conducted. The results showed that CoAlLaOx exhibited superior carbon resistance, while NiAlLaOx demonstrated good catalytic stability.
A comparative study of 10 wt% Co-based catalysts supported on La2O3, AlZnOx and AlLaOx was performed for glycerol steam reforming (GSR). The catalysts physicochemical char-acterization was done through several techniques. All catalysts were screened in terms of catalytic activity and time-on-stream stability for GSR. The catalytic activity experiments aimed to assess the effect of temperature (400-700 degrees C) on the glycerol conversion and yield of gaseous products (H2, CO2, CO and CH4). Additionally, catalytic stability experiments were conducted at 625 degrees C to investigate deactivation of the catalysts, in which a drop in the activity was observed, especially for Co/La2O3. The glycerol conversion into gaseous products as a function of the time-on-stream was more affected for all catalysts in com-parison to total glycerol conversion, being this effect assigned to the increase in the for-mation of liquid products and to the formation of coke. CoAlLaOx was observed to be more carbon-resistant, followed by CoAlZnOx, through the measurement of the quantity of carbonaceous species formed during the GSR experiments. A NiAlLaOx catalyst was also prepared and assessed in terms of catalytic stability for GSR; a stable behavior was observed throughout all experiment in relation to glycerol conversion into gaseous prod-ucts and H2 yield.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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