Life cycle indicator comparison of copper, silver and zinc nanoparticle production through electric arc/spark evaporation or chemical reduction

A4 Conference proceedings


Internal Authors/Editors


Publication Details

List of Authors: Martin Slotte, Gregory Metha, Ron Zevenhoven
Editors: Ron Zevenhoven
Place: Åbo
Publication year: 2014
Publisher: Abo Akademi University, Thermal and Flow Engineering Laboratory
Book title: 27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2014
ISBN: 978-1-63439-134-4


Abstract

Ways to produce metallic nanoparticles and the scale-up of these processes have seen increased interest as the industrial application of nanoparticles continues to grow. Their feasibility from an environmental point of view can be assessed by means of Life Cycle Analysis (LCA).
In this work two methods of metallic nanoparticles production, by evaporation/condensation of metal using electrical arc/spark discharge reactors or by chemical reduction of metal salts in aqueous solutions, are evaluated based on the Life Cycle Indicators. The evaporation of metal using electrical discharge reactors is a method studied in the European Commission 7th Framework Program “BUONAPART-E”. The environmental impact of the two different nanoparticle production approaches is here compared for three metals: copper, silver and zinc.
The chemical routes of producing nanoparticles require several different chemicals and reactions while the electrical discharge routes use electricity to evaporate metal in a reactor under inert atmosphere. The nanoparticle production processes were modeled using “SimaPro” LCA software. Data for both the chemical production routes and the arc/spark routes was taken from literature.
The choice of the best route for the production of each metal is strongly dependent on the final yield of the metallic nanoparticles. The yields for the chemical processes are not reported in the open literature and therefore the comparisons have to be made with varying yields. At similar yields the electrical process has in general a lower environmental footprint than the studied chemical routes. The step or chemical with the greatest environmental impact can vary significantly depending on process and metal being studied. For copper and zinc nanoparticle production the main source of CO2 emissions is the production of electricity or the production of the reducing agent, for the electrical discharge and chemical methods, respectively. For silver particles it is the production of pure silver in both cases.


Keywords

copper, LCA, Nanoparticles, Silver nanoparticles, Zinc

Last updated on 2019-18-07 at 07:26