Detailed Characterization of 2-Heptanone Conversion by Dielectric Barrier Discharge in N2 and N2/O2 Mixtures

被引:28
作者
Chiper, Alina Silvia [2 ]
Blin-Simiand, Nicole [1 ]
Heninger, Michel [3 ]
Mestdagh, Helene [4 ]
Boissel, Pierre [3 ]
Jorand, Francois [1 ]
Lemaire, Joel [4 ]
Leprovost, Julien [3 ]
Pasquiers, Stephane [1 ]
Popa, Gheorghe [2 ]
Postel, Christian [1 ]
机构
[1] Univ Paris 11, CNRS, UMR 8578, Phys Gaz & Plasmas Lab, F-91405 Orsay, France
[2] Alexandru Ioan Cuza Univ, Fac Phys, Dept Plasma Phys, Iasi 700506, Romania
[3] Univ Paris 11, AlyXan, F-91405 Orsay, France
[4] Univ Paris 11, CNRS, UMR 8000, Chim Phys Lab, F-91405 Orsay, France
关键词
VOLATILE ORGANIC-COMPOUNDS; ION FLOW TUBE; PROTON-TRANSFER-REACTION; MASS-SPECTROMETRY; GAS-PHASE; REMOVAL EFFICIENCY; ALIPHATIC-KETONES; KINETIC DATA; AIR; ACETALDEHYDE;
D O I
10.1021/jp907295d
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
The products of 2-heptanone conversion by dielectric barrier discharge plasma are analyzed under different conditions: alternating current (ac) or pulsed mode of excitation, variable energy, variable composition of the carrier gas. The efficiency of the conversion is higher using a pulse excitation mode than an ac mode. With a small oxygen percentage (about 2-3%) added to nitrogen, 2-heptanone is about 30% more efficiently removed than in pure nitrogen, while the 2-heptanone removal decreases with an oxygen percentage higher than 3%. A new analysis method, based on chemical ionization mass spectrometry, is used for volatile organic compound detection along with chromatography. Several products issued from 2-heptanone conversion with ac excitation are identified in nitrogen and in air, and a chemical scheme is proposed to explain their formation and their treatment by the discharge. It appears that byproducts are issued not only from oxidation reactions, but also from C-C bond cleavage by collisions with electrons or nitrogen excited states.
引用
收藏
页码:397 / 407
页数:11
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