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

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Document Type

Article

Source Title

Industrial and Engineering Chemistry Research

Volume

58

Issue

8

First Page

3188

Last Page

3198

Publication Date

2-27-2019

Abstract

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.

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Digitial Object Identifier (DOI)

10.1021/acs.iecr.8b06156

Disciplines

Chemical Engineering

Keywords

Carbon sequestration

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