The present study investigated the feasibility of bioCO 2 sequestration using Chlorella sorokiniana. It was found that 5% CO 2 (v/v) in air was the most suitable concentration for the growth of this organism. At this concentration, the maximum rate of CO 2 sequestered and the biomass obtained were found to be 1.21gL −1 d −1 and 4.4gL −1 respectively. Modeling and simulation of the growth profile was obtained using the logistic equation. Further, at higher CO 2 concentrations, pH drop in the growth media, TAP [-acetate], was prevented by replacing NH 4 Cl by NaNO 3. Additionally, the study evaluated the performance of two reactors namely: bubble column and airlift reactor based on their growth profile and transport properties like K L a and mixing time. The growth profile was better in airlift reactor and it provides cyclic axial mixing of media. K L a of downcomer was significantly lower than the riser in airlift reactor.