ABSTRACT
ABST R AC T Flaring emission during chemical plant turnaround operations generates huge amounts of air pollutants and also results in tremendous raw material and energy loss. This paper addresses near-zero aring studies for chemical plant turnaround operation to advance current endeavors on are minimization. Since off-spec products are inevitable during plant turnaround operations, they must be either recycled to the upstream process for online reuse or stored somewhere temporarily for future reprocessing when the plant manufacturing becomes stable, such that the off-spec products can be saved instead of being ared. A dynamic simulation based general methodology framework has been developed. The efcacies of the development are demonstrated by a virtual plant startup test.
