Dielectric Barrier Discharge Initiated Gas-Phase Decomposition of CO2 to CO and C6–C9 Alkanes to C1–C3 Hydrocarbons on Glass, Molecular Sieve 10X and TiO2/ZnO Surfaces

Abstract

Atmospheric Pressure Dielectric Barrier Discharge (APDBD) initiated decomposition of CO 2 and C 6 -C 9 alkanes (in Ar carrier) with uncoated and TiO 2 /ZnO coated glass surfaces, and under molecular sieve 10 · packing are presented in this study. Alkanes employed include 2-methylpentane, cyclohexane, n-hexane, n-heptane, n-octane, n-nonane and their decomposition products studied include C 1 -C 3 hydrocarbons viz. CH 4 , C 2 H 4 , C 2 H 6 and C 3 H 8 . Generally the yields of all these C 1 -C 3 products increased with discharge energy, however to a major extent the parent alkane structure controlled the relative concentration profiles of the individual products. Typically the slopes of the increase in various products yield varied from 0.025 to 0.25 ppm (v/v) mm V À1 . However, in the case of cyclohexane the total yield of methane, ethane and propane were only *20% of ethylene yield. Use of TiO 2 as well as TiO 2 /ZnO coated central glass electrode in the APDBD apparatus showed *11% enhancement in CO 2 ! CO degradation efficiency. However, while overall 2-methylpentane decomposition reduced significantly to *30%, in case of n-octane its decomposition to the C 1 -C 3 products remained unaffected. On the other hand under molecular sieve 10X packing, yield of CH 4 and C 2 H 4 increased significantly in both cases.

Microwave discharge in liquid n‐heptane with and without bubble flow of argon

“…It was established in ref. that monotonous growth of the methane, ethylene, ethane, and propane yields is observed with increase in the electric field strength. In ref.…”

“…Decomposition of n ‐heptane was also investigated in a barrier discharge . It was established in ref.…”

“… that as the number of C atoms in the alkane molecule increases, its degree of conversion and energy efficiency increase, in contrast to the results obtained in ref. .…”

Dielectric barrier discharge plasma torch treatment of pyrolysis fuel oil in presence of methane and ethane

“…When the investigation of the plasma features through power consumption is the main goal, in most studies, the Lissuajous method in addition to the Ohm's method [25,26,36,37] has been mentioned. However, in the present research, the concentration was on the investigation of plasmachemistry phenomena where the qualitative behavior of power consumption (DBD electrical behavior) would be sufficiently enough.…”

Transformation of Carbon Dioxide to Useable Products through Free Radical‐Induced Reactions

“…Chemical reduction of CO 2 with different energy inputs such as light energy through photochemical reactions using semiconductor photocatalysts [26][27][28][29][30][31][32], high-energy ionizing radiation (radiolysis) [33][34][35][36][37], electrochemical reactions (electrolysis) [38][39][40][41][42] (discussed below), sonolysis [43][44][45], and dielectric barrier discharge [46][47][48][49][50], etc. has been studied by researchers all over the world in the last decades.…”