A pinch-based approach for targeting carbon capture, utilization, and storage systems

• Main Authors: Thengane, Sonal K., Tan, Raymond Girard R., Foo, Dominic C. Y., Bandyopadhyay, Santanu
• Format: text
• Published: Animo Repository 2019
• Subjects: Carbon sequestration; Chemical Engineering
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/3639; https://animorepository.dlsu.edu.ph/context/faculty_research/article/4641/type/native/viewcontent/acs.iecr.8b06156
• Institution: De La Salle University

Carbon capture and storage (CCS) reduces carbon dioxide (CO 2 ) emissions by sequestration of captured CO 2 for long-term storage whereas carbon capture and utilization (CCU) offers resource conservation benefits by displacing the need for extracted CO 2 from natural sources. The integration of these two results in a carbon capture, utilization, and storage (CCUS) system, which either uses CO 2 for profitable applications or stores it in the reservoirs. One of the key problems in CCS systems is to optimally match the sources (e.g., CO 2 captured from fossil-fueled power plants) and the sinks (e.g., available geological reservoirs for storing the captured CO 2 ). In practice, the geological storage sites may be available at different times and have limitations on the maximum CO 2 storage capacity and the injectivity rate, subject to other geological characteristics. This work proposes an improved pinch analysis-based methodology by simultaneously considering the injectivity constraints and variable availability of all sources and sinks. Two types of CO 2 storage are considered in this work, that is, sinks with fixed life and sinks with fixed capacity. A new CCUS Mapping Diagram is presented to show the capture of CO 2 to the individual sinks. Four illustrative examples demonstrate the applicability of the proposed methodology to the CCUS systems in which purity is not a constraint in CO 2 utilization. In some cases, the improved methodology overcomes the pitfall of the previous method by identifying rigorous CCUS targets. © 2019 American Chemical Society.