Carbon nanotubes (CNTs) have generated a great deal of interest due to their unique properties. In this study, we examine the transport properties of various nanotubes using REBO-MD to determine the effects of diameter and chirality on transport mode. Both oxygen and methane were diffused through different CNTs. It was determined that non-equlibrium transport through CNTs results in anomalous diffusion. As nanotube diameter increases, transport becomes more normal.