Abstract
Post-combustion CO2 capture (PCC) through gas-liquid absorption is currently considered as the most viable technology available for a commercial scale power plant application. One of the major limitations to the implementation of post-combustion CO2 capture technology is the capital and the operation cost. Absorber column enhancement by applying the desired temperature profile through intercooling (including inter-heating) has been considered as one of the methods for improvement of carbon loading in rich solvent, and subsequently for reduction of the energy penalty and/or the absorber column height and capital cost. For some solvents such as PZ, the gain from intercooling is significant, reducing not only the circulation rate of solvent, but also the heat requirement of solvent regeneration or the number of stages required to reach the specified CO2 capture efficiency. The absorber performance is determined thermodynamically by the absorption kinetics of chemical reaction, the reaction enhanced mass transfer rate, and the equilibrium tendency in column in addition to the heat mitigation. From one perspective a relatively high operation temperature is desired to obtain fast kinetics and absorption rate, while on the other hand a low temperature is preferred to increase the CO2 loading and thus the solvent capacity. This leads to an investigation of the desired or the optimum absorber temperature profile at which the absorption rate will reach its maximum at all stages in column, and of the method to reach such an optimum T-profile through application of intercooling or in-column heat removal. The present paper presents a method aiming at defining the optimum T-profile, which can eventually progress toward a goal of the potential ultimate gain from a proper arrangement of intercooling.
Original language | English |
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State | Published - 2018 |
Event | 14th International Conference on Greenhouse Gas Control Technologies, GHGT 2018 - Melbourne, Australia Duration: Oct 21 2018 → Oct 25 2018 |
Conference
Conference | 14th International Conference on Greenhouse Gas Control Technologies, GHGT 2018 |
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Country/Territory | Australia |
City | Melbourne |
Period | 10/21/18 → 10/25/18 |
Bibliographical note
Publisher Copyright:© 2018 GHGT 2018 - 14th International Conference on Greenhouse Gas Control Technologies. All rights reserved.
Funding
This work was supported by the Carbon Management Research Group (CMRG): Louisville Gas and Electric & Kentucky Utilities (LGE&KU), Duke Energy, Kentucky Department for Energy Development and Independence (KY DEDI), and the Electric Power Research Institute, Inc. (EPRI).
Funders | Funder number |
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Kentucky Department for Energy Development and Independence | |
Louisville Gas and Electric and Kentucky Utilities | |
Duke Energy | |
Electric Power Research Institute, Louisville Gas & Electric |
Keywords
- Absorption
- CO removal
- Intercooling
- MDEA
- MEA
- Optimum absorber T-profile
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Management, Monitoring, Policy and Law
- Pollution
- General Energy