Oxidation of aromatic hydrocarbons with oxygen in a radiofrequency plasma

Abstract

The reactions of three aromatic hydrocarhons, benzene, tohwne, and styrene, with o.x'ygen in a radiofi'equenc) ' (~f)

Decomposition of benzene in the RF plasma environment

“…Consequently, this study hypothesized that some phenol should be formed in the C 6 H 6 /O 2 /Ar system. The fact that reaction of C 6 H 6 with O 2 can produce phenol in the RF plasma has already been confirmed in the study by Tezuka and Yajima [36]. However, no phenol was detected in this C 6 H 6 /O 2 /Ar system.…”

“…Comparing the operational conditions of this study with those of Tezuka and Yajima reveals no significant difference in input power, with 30 W of RF input power and 0.8 mmol min −1 of C C 6 H 6 in the study of Tezuka and Yajima [36], as compared to an RF input power at 40 or 20 W and 2 or 1% (approximately 0.089 or 0.045 mmol min −1 ) of C C 6 H 6 in this study. However, C C 6 H 6 is much less in this study being about 5-10%.…”

“…Phenol is a major product formed from combustion or oxidation of C 6 H 6 under both atmospheric pressure and low-pressure conditions [7,10,11,36]. Generally, non-thermal plasma (NTP) is a source of gasphase free radical (O( 1 D), O( 3 P), OH • ) and other active species [37].…”

Growth Mechanism of Oxygen-Containing Functional Plasma Polymers

“…H þ CH 2 CHO, and further oxidation, thus leading to less reactive monovalent radicals. [74,75] The first reaction pathway might explain the steadily reducing O/C ratio with increasing energy input above the transition point, since HCO does not likely lead to film growth. Therefore, we assume that the transition in the growth rate can be attributed to an enhanced formation of atomic oxygen species with increasing energy input.…”

Decomposition of benzene in the RF plasma environmentPart I. Formation of gaseous products and carbon depositions

“…Numerous types of plasma can be used to destroy C 6 H 6 [1][2][3][4][5][6]. Non-thermal plasma, which has low energy requirements has been demonstrated to be an effective process for decomposing inorganic or organic air pollutants, leading to high destruction removal efficiencies (DREs).…”