Potential of N2/O2 atmospheric pressure needle-water DC microplasmas for nitrogen fixation: nitrite-free synthesis of nitrates

被引：18

作者：

Pattyn, C. ^{[1
]}

Maira, N. ^{[1
]}

Remy, A. ^{[1
]}

Roy, N. C. ^{[1
]}

Iseni, S. ^{[2
]}

Petitjean, D. ^{[1
]}

Reniers, F. ^{[1
]}

机构：

[1] Univ Libre Bruxelles, Fac Sci, Chem Surfaces Interfaces & Nanomat ChemSIN, Ave FD Roosevelt 50, B-1050 Brussels, Belgium

[2] Univ Orleans, GREMI Grp Rech Energet Milieux Ionises, UMR 7344, CNRS, 14 Rue Issoudun,BP6744, F-45067 Orleans 2, France

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2020年 / 22卷 / 42期

关键词：

PLASMA; DISCHARGES; OXIDES; AIR; OZONE; CYCLE; DBD;

D O I：

10.1039/d0cp03858j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A needle-water DC microplasma system working at atmospheric pressure in N-2/O-2 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.

引用

页码：24801 / 24812

页数：12

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