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

• Main Author: Mat Yusoff, Nurul Izati
• Format: Final Year Project
• Language: English; English
• Published: Universiti Teknologi Petronas 2011
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/8919/1/2011-Consequence%20Study%20Of%20Co2%20Release%20From%20Carbon%20Capture%20And%20Storage%20%28CCS%29%20Using%20Fluent-Cfd%20Mode.pdf; http://utpedia.utp.edu.my/8919/2/2009%20Bachelor%20-%20Partial%20stoke%20Test%20OF%20Emergency%20Shutdown%20Valve%20%28MASONEILAN%29.pdf; http://utpedia.utp.edu.my/8919/

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.