Energy Consumption and Exergy Analysis of MEA-Based and Hydrate-Based CO₂ Separation

Abstract

Carbon capture and storage (CCS) is regarded as the most efficient approach in handling the global warming crisis. MEA-based CO 2 capture is a well-developed chemical absorption method with a long period of industrial application. A novel hydrate-based gas separation (HBGS) method, with a wide range of advantages, has recently received special attention from researchers. In this study, two different CO 2 separation processes were simulated utilizing Aspen Plus software. The feasibility of both processes was validated, and the process energy consumption and exergy loss were also compared at the same flue gas condition. Some efforts have also been made to investigate the effects of different operation parameters on the process energy efficiency. Results show that the first law efficiency of the MEA-based CO 2 separation system is 88.19% and the second law efficiency of the system is 38.32%, while the corresponding values of the hydrate-based separation system are 74.15% and 38.85%, respectively. Cooling of the lean amine solution and the regeneration process occupy the largest portion of exergy loss in the MEA separation system. In the hydration separation, the flue gas compression and cooling are the major causes for exergy loss.

High‐efficiency CO2 capture and separation based on hydrate technology: A review

“…Xie et al . simulated the CO 2 separation processes of MEA‐based and hydrate‐based technology by Aspen Plus.…”

“…Xie et al 108 simulated the CO 2 separation processes of MEA-based and hydrate-based technology by Aspen Plus. They further compared the energy consumption between MEA-based and hydrate-based technology.…”

Optimisation of carbon capture from flue gas from a Waste-to-Energy plant using surrogate modelling and global optimisation

“…To achieve post combustion capture of CO 2 , amine based scrubbing of flue gas with subsequent stripping of CO 2 from the amine solution is perhaps the most applied and mature technology. Mono-Ethanol Amine (MEA) is often applied, but a significant challenge also applicable to other amines, is the relatively large amount of energy required to regenerate the amine [5].…”

Conceptual Design and Analysis of a Novel CO2 Hydrate-Based Refrigeration System with Cold Energy Storage

“…In recent decades, CO 2 hydrate has received a growing attention for its various industrial potentials. Hydrate-based CO 2 capture and separation technology was thoroughly introduced by Ma et al It is regarded as a promising option for capturing CO 2 from gas streaming of fossil fuel power plants. , Some works were made to put CO 2 hydrate-based desalination into practice. , CO 2 hydrate can also be used as a secondary refrigerant to minimize the usage of traditional greenhouse refrigerants . In addition, it can be formed at positive temperature conditions, which are suitable for the air conditioning applications. , With a dissociation enthalpy higher than ice slurry, this hydrate also has a higher thermal capacity than most traditional coolants .…”

“…Hydrate-based CO 2 capture and separation technology was thoroughly introduced by Ma et al 16 It is regarded as a promising option for capturing CO 2 from gas streaming of fossil fuel power plants. 17,18 Some works were made to put CO 2 hydrate-based desalination into practice. 19,20 CO 2 hydrate can also be used as a secondary refrigerant to minimize the usage of traditional greenhouse refrigerants.…”