CO₂ capture by pyrrolidine: Reaction mechanism and mass transfer

Abstract

A new carbon dioxide capture process by means of gas-liquid absorption using pyrrolidine aqueous solutions in a bubble column reactor obtaining suitable results in comparison with other commonly used amines is analyzed. The influence of several operation variables such as amine concentration and gas flow rate has been studied. Carbon dioxide mass-transfer rate data have shown a different behavior than other amine-based systems because a constant value in absorption rate was observed in the middle of batch experiments. 13C and 1 H NMR spectroscopy studies were performed to analyze the species present during the experiments. These data and the carbon dioxide loading allowed to explain the reaction mechanism existed between these reagents.

Kinetics of the absorption of carbon dioxide into aqueous ammonia solutions

“…Carbon capture and storage (CCS) is a promising technology that enables effective management of CO 2 emissions while society expands energy portfolios to include cleaner energy sources . Technical strategies for the implementation of CCS include precombustion, oxy‐combustion, and postcombustion approaches, among which postcombustion CO 2 capture is believed to be the simplest and dominant solution to CO 2 mitigation in the near future …”

CO2 Absorption and Regeneration Using Amines with Different Degrees of Steric Hindrance

“…also shows that the constant absorption rate period due to the carbamate hydrolysis produces a similar absorption rate independent of the initial amine concentration in the liquid phase. This is related to the carbonate‐bicarbonate equilibrium .…”

Modeling study of the heat of absorption and solid precipitation for CO2capture by chilled ammonia

“…[3][4][5][6] Post-combustion capture attracts the most attention because it can be more easily implemented on existing power plants. [7][8][9] In post-combustion capture, alkanolamine solutions, monoethanolamine (MEA) in particular, act as CO 2 absorbents with high reaction rates. [10][11][12] However, amine-based capture suffers from corrosion and high operating cost, including absorbent degradation and relatively high energy consumption.…”