Comparative study of CO2 capture efficiency using sodium hydroxide and monoethanolamine solutions in a spray column

Surfactant adsorption onto activated carbon and its effect on absorption with chemical reaction

Comparative Study of Co2 Capture Efficiency Using Sodium Hydroxide and Monoethanolamine Solutions in a Spray Column

A new look to the old solvent: Mass transfer performance and mechanism of CO2 absorption into pure monoethanolamine in a spray column

Predicting overall mass transfer coefficients of CO2 capture into monoethanolamine in spray columns with hybrid machine learning

ZIF-8 and ZIF-67 as catalysts for promoting carbon dioxide capture based on monoethanolamine solution

The absorption of sulfur dioxide into highly concentrated sodium hydroxide in a spray column from simulated flue gas was investigated. The influences of different operating conditions on the SO2 removal efficiency, such as sodium hydroxide concentration, liquid-to-gas ratio, gas velocity and SO2 concentration, were examined. The overall volume transfer coefficients (kGa), under moderate conditions, were obtained by introducing the instantaneous and irreversible chemical reaction into the two-film theory to establish a model that allowed the calculation of theoretical values of the overall volume-transfer coefficient. It was found that the absorption process was controlled by diffusion through gas film when a highly concentrated caustic soda solution was adopted. The overall volume-transfer coefficient was essentially independent of concentration of SO2 in gas phase and positively related to the gas and liquid flow rates. The formula of kGa was fitted for the process and found to be in good agreement with ...

Intensification of CO₂ capture by monoethanolamine solution containing TiO2 nanoparticles in a rotating packed bed

Spray towers are widely used for controlling air pollution by gases such as SO2, CO2, NOx, and HCl. Results of sulfur dioxide absorption in a spray tower using solutions of 1 g L–1 and 2 g L–1 of hydrogen peroxide are reported. For comparison, a water and sodium hydroxide solution was also used for SO2 abatement. The results indicate that H2O2 may be an important alternative for SO2 removal in spray towers. A set of experimental removal efficiency data was obtained as a function of gas and liquid flow rates. Volumetric mass transfer coefficients (kga) were calculated and an experimental relationship among kga, gas, and liquid flow rates was proposed. As a final experiment, an oxidation process assisted by UV radiation using a 1 g L–1 solution of H2O2 was carried out to speed up the SO2 removal rate. The results obtained in this condition are similar to those achieved with a solution of 2 g L–1 H2O2.

Photocatalytic reduction of carbon dioxide (CO2) to form a valuable energy source of methane (CH4) in monoethanolamine (MEA) solution is first investigated by mesoporous photocatalysts of Ti–MCM-41 in this study. The MEA solution was chosen as the absorbent and reductant because amine absorption is one of the most popular methods for CO2 capture from flue gas streams. Also, it is intended to integrate the CO2 capture and utilization into one process. The photocatalytic results of methane yields indicated that MEA served as a better reductant than water and NaOH which have been commonly used for CO2 reduction. For the best photocatalyst of Ti–MCM-41(50) manufactured at a Si/Ti molar ratio of 50, its methane yield (62.42 μmol/g of cat.) was much higher than that of commercial P25 photocatalyst after 8 h of UV illumination. A photoreduction quantum efficiency (PQE) of 9.18% was achieved.

Performance of CO2 absorption in a spray tower using blended ammonia and piperazine solution: Experimental studies and comparisons

Modelling and Design of Carbon Dioxide Absorption in Rotating Packed Bed and Packed Column

Experimental studies of air-blast atomization on the CO2 capture with aqueous alkali solutions

Presence of activated carbon particles from waste walnut shell as a biosorbent in monoethanolamine (MEA) solution to enhance carbon dioxide absorption

Simulation and analysis of CO2 capture process with aqueous monoethanolamine solution

Pushing the limits of intensified CO2 post-combustion capture by gas–liquid absorption through a membrane contactor