Potential of N2/O2atmospheric pressure needle-water DC microplasmas for nitrogen fixation: nitrite-free synthesis of nitrates

Autor: Nepal Chandra Roy, David Petitjean, Cedric Pattyn, Nicolas Maira, Sylvain Iseni, François Reniers, Antoine Remy
Přispěvatelé: Faculté des Sciences [Bruxelles] (ULB), Université libre de Bruxelles (ULB), Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)
Rok vydání: 2020
Předmět:
Materials science
Absorption spectroscopy
Inorganic chemistry
General Physics and Astronomy
02 engineering and technology
7. Clean energy
01 natural sciences
law.invention
Physico-chimie générale
chemistry.chemical_compound
[CHIM.GENI]Chemical Sciences/Chemical engineering
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]
law
0103 physical sciences
[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering
Physical and Theoretical Chemistry
Nitrite
010302 applied physics
Atmospheric pressure
Physique
Microplasma
[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment
[SPI.PLASMA]Engineering Sciences [physics]/Plasmas
Aqueous two-phase system
Chimie théorique
Plasma
Astronomie
021001 nanoscience & nanotechnology
6. Clean water
Cathode
Anode
chemistry
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
0210 nano-technology
Zdroj: Physical Chemistry Chemical Physics
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2020, 22 (42), pp.24801-24812. ⟨10.1039/D0CP03858J⟩
PCCP. Physical chemistry chemical physics, 22 (42
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2020, ⟨10.1039/D0CP03858J⟩
ISSN: 1463-9084
1463-9076
DOI: 10.1039/d0cp03858j
Popis: A needle-water DC microplasma system working at atmospheric pressure in N2/O2 gas mixtures is used to study the fundamental mechanisms of nitrate/nitrite synthesis in highly complex and yet little-known plasma-water systems. Plasma properties are investigated by means of optical emission spectroscopy while the activated water is analyzed following the treatment using ionic chromatography and UV-Vis absorbance spectroscopy. Experiments highlight that the energy efficiency and selectivity of the process are influenced by the oxygen content and the plasma-induced water heating, with strong differences when the water surface is the anode or the cathode electrode. Nitrates are successfully synthesized without residual nitrites in the solution with a comparatively higher energy efficiency when the water is the cathode. The possible reactions involved in the gas phase and aqueous phase chemistry are presented and future scope for the optimization of the system is discussed.
SCOPUS: ar.j
info:eu-repo/semantics/published
Databáze: OpenAIRE
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