Energy‐saving process configurations for monoethanolamine‐based CO₂ capture system

Abstract

It is evident from several researches that combining a couple of process modifications is effective in reducing reboiler duty in the chemical absorption‐based carbon capture process. Although extensive works on these combined modifications exist in literature, studies on combined lean vapour compression (LVC) and rich solvent preheating (RSP) are unavailable, despite their potentials as promising energy‐saving technologies. This simulation‐based study therefore explored standalone and combined process modifications capable of minimizing reboiler duty in monoethanolamine (MEA)‐based postcombustion CO2 capture system. Using the electrolyte nonrandom two‐liquid (ELECNRTL) property method in Aspen Plus®, a rigorous rate‐based simulation was performed and validated for conventional MEA‐based capture system. Subsequently, three main process modifications, namely, LVC, RSP and combined LVC and RSP, were investigated to evaluate their impact on energy consumption level in the stripping column. The modifications were able to reduce the total equivalent electrical penalty on the power plant by 12.94%, 5.24% and 14.48%, respectively. The results from this study demonstrate that a detailed optimization of the combined LVC and RSP process configuration could achieve considerable energy saving in MEA‐based capture systems.

Gas Solubility Using Deep Eutectic Solvents: Review and Analysis

“…Among the several technologies for CO 2 capture from flue gases, aqueous amine solutions, such as monoethanolamine (MEA), methyldiethanolamine (MDEA), and 2-amino-2-methyl-1-propanol (AMP) have traditionally been used as chemical solvents to capture CO 2 by chemical absorption. − They exhibit excellent absorption capacity, high reactivity, high selectivity, and low price . However, they are not environment friendly due to their toxicity, partial degradation, high vapor pressure, corrosive byproduct formation, intensive energy consumption, and high uptake costs.…”

Multistage Circulation Absorption Improvement: Simulation and Energy-Saving Evaluation of an Innovative Amine-Based CO2 Capture Process

“…For example, the RSS modification is used to recover heat from the stripped gas at the top of the stripper, and the LVR modification is employed to recover the heat from the lean solvent. Additional comparable modifications include rich solvent preheating, 45 stripper interheating 52 and parallel exchanger arrangement. 29 In practical large-scale CO 2 capture processes, combining the MSC process with various heat recovery and reuse modifications presents an opportunity to break through the bottleneck of high energy consumption.…”

Economic and Environmental Potential of Large-Scale Renewable Synthetic Jet Fuel Production through Integration into a Biomass CHP Plant in Sweden

“…The thermodynamic fluid property package used was the nonrandom two-liquid, NRTL, activity coefficient model for the rWGS and the F-T units. The ELECNRTL thermodynamic model was, on the other hand, used for the CO 2 capture unit, being a widely accepted property method for simulating chemical absorption of relevant systems due to its versatility [35][36][37]. The thermodynamic models used were selected according to [38].…”