Consequence Study of C02 Release from Carbon Capture and Storage (CCS) Using FLUENT-CFD Modeling

Consequence study of accidental C02 released from Carbon Capture and Storage
(CCS) pipelines is carried out due to the possibility of pipelines failure and the hazard
imposed from the accidents to human and environment. A two dimensional (2D) C~
dispersion model is developed using FLUENT -CFD to be compared or validated against
Kit Fox Field Experiment data and Fluidyn-PANACHE CFD tool. The validated model
is then used to study the release of C02 from CCS. FLUENT is chosen since it has been
widely used as tool to simulate atmospheric toxic dispersion in several previous studies.
Geometry used for the model is the one used in Kit Fox Experiment with presence of
obstacles. This study basically involves comparison of results obtained from FLUENT
model against real experimental data and other CFD tool. Also by using the model, a
case study is carried out on C~ accidental release from CCS facilities to observe its
consequence towards surrounding population. From comparison, C02 concentration
obtained by FLUENT exhibits under-prediction by 8% against field experiment, but it is
closer to experimental data compared to the one obtained by PANACHE. FLUENT
demonstrates average under prediction concentration due to average wind parameter
used in the model, and it has been identified as one of characteristics for most of CFD
models. From case study of C02 release from CCS pipelines, concentration given by
FLUENT deviates significantly from theoretical calculation but the variation is due to
simplification of using simple dispersion coefficients in theoretical calculation.
Accumulation of high C02 concentration in region with obstacles imposes very high
risks of adverse effects, including death towards human. Concentration prediction
through FLUENT -CFD modeling can be utilized as tool to predict C02 dispersion and
its impacts towards people.