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.