Article (Scientific journals)
Investigation of the potential effect of encapsulated metal nanoparticles on enhancement of thermophilic anaerobic digestion
Al-Ahmad, Alaa; Lambert, Stéphanie; Mahy, Julien et al.
2023In AIMS Environmental Science, 10 (6), p. 764-793
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Keywords :
nanoparticles; heavy metal; anaerobic digestion; methane production; hydrogen; sol-gel process; General Environmental Science
Abstract :
[en] The present work investigates the enhancement effect of seven different catalysts made of Cu/SiO2, Pd/SiO2, Pt/SiO2, Ni/SiO2, Co/SiO2, Ag/SiO2 and Fe/SiO2 nanoparticles (NPs) on methane production during thermophilic anaerobic digestion. The tested NPs were synthesized by the sol-gel process and encapsulated in porous silica (SiO2) to prevent their coagulation and agglomeration. Transmission electron microscopy (TEM) pictures confirmed the specific morphologies of all seven catalysts. Then, these 7 NPs were tested first in batch experiments with acetate as a carbon substrate for biomethane production. Ni/SiO2 and Co/SiO2 showed the best enhancement of methane production from acetate. From this part, both NPs were tested for bio-methane production on two different substrates: starch and glucose. With the starch substrate, the improvements of methane production were equal to 47% and 22%, respectively, for Ni-and Co/SiO2 compared to control sample. In the last part of this work, the influences of NP concentration and thermal pre-treatment applied to the NPs on bio-methane production from glucose were investigated. The results showed that all forms of nickel and cobalt NPs enhance the methane production, and their effect increased with the increase of their concentrations. The best sample was the calcined nickel NPs at a concentration of 10-4 mol L-1 , leading to a methane production rate of 72.5% compared to the control.
Disciplines :
Materials science & engineering
Chemical engineering
Author, co-author :
Al-Ahmad, Alaa;  Centre Wallon de Biologie Industrielle, Université de Liège, Gembloux Agro-Bio Tech, Gembloux, Belgium
Lambert, Stéphanie  ;  Université de Liège - ULiège > Department of Chemical Engineering
Mahy, Julien  ;  Université de Liège - ULiège > Chemical engineering ; Centre-Eau Terre Environnement, Institut National de la Recherche Scientifique (INRS), Université du Québec, Québec, Canada
Heinrichs, Benoît ;  Université de Liège - ULiège > Department of Chemical Engineering
Wannoussa, Wissal;  Centre Wallon de Biologie Industrielle, Université de Liège, Gembloux Agro-Bio Tech, Gembloux, Belgium
Tasseroul, Ludivine ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries
Weekers, Frédéric ;  Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry ; Artechno SA, Belgium
Thonart, Philippe ;  Université de Liège - ULiège > Département GxABT > Microbial technologies
Hiligsmann, Serge ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries ; Ecole Polytechnique, Université Libre de Bruxelles, Brussels, Belgium ; BioTech-Extraction Department, CELABOR Research Center, Herve, Belgium
Language :
English
Title :
Investigation of the potential effect of encapsulated metal nanoparticles on enhancement of thermophilic anaerobic digestion
Publication date :
28 November 2023
Journal title :
AIMS Environmental Science
ISSN :
2372-0344
eISSN :
2372-0352
Publisher :
American Institute of Mathematical Sciences (AIMS)
Volume :
10
Issue :
6
Pages :
764-793
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 29 November 2023

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