Numerical modeling of CO2 capture in a spray tower with aqueous ammonia and full-cone atomizers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0199241" target="_blank" >RIV/00216305:26210/26:0199241 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0301932225002812?pes=vor&utm_source=clarivate&getft_integrator=clarivate" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0301932225002812?pes=vor&utm_source=clarivate&getft_integrator=clarivate</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijmultiphaseflow.2025.105405" target="_blank" >10.1016/j.ijmultiphaseflow.2025.105405</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical modeling of CO2 capture in a spray tower with aqueous ammonia and full-cone atomizers

Popis výsledku v původním jazyce

Chemical absorption in a spray tower using aqueous ammonia is a promising method for CO2 post-combustion capture, a key step in carbon capture and storage (CCS) approaches. However, this process is highly sensitive to atomization and subsequent droplet hydrodynamics. To investigate the impact of spray parameters on column performance, we conducted MATLAB calculations and CFD simulations focusing on droplet hydrodynamics, evaporation, and CO2 absorption. Evaporation was calculated using an infinite conductivity model while absorption was solved using an empirical model. The effect of droplet diameter on droplet entrainment and wall deposition was revealed via the concept of droplet terminal settling velocity and droplet stopping distance. The capture efficiency for optimal parameters determined by MATLAB calculations was 67 %, which was further enhanced to 74 % by adjusting the spray angle or reducing the gas velocity. CFD simulations of the spray column underlined the necessity of two-way coupled simulations as the spray significantly affects the gas flow and causes, among other things, back-mixing behavior. Droplet stopping distances were longer than those in MAT-LAB calculations, with discrepancies increasing alongside the liquid-to-gas ratio. The evaporative effect was minimal, as the gas quickly became saturated.

Název v anglickém jazyce

Numerical modeling of CO2 capture in a spray tower with aqueous ammonia and full-cone atomizers

Popis výsledku anglicky

Chemical absorption in a spray tower using aqueous ammonia is a promising method for CO2 post-combustion capture, a key step in carbon capture and storage (CCS) approaches. However, this process is highly sensitive to atomization and subsequent droplet hydrodynamics. To investigate the impact of spray parameters on column performance, we conducted MATLAB calculations and CFD simulations focusing on droplet hydrodynamics, evaporation, and CO2 absorption. Evaporation was calculated using an infinite conductivity model while absorption was solved using an empirical model. The effect of droplet diameter on droplet entrainment and wall deposition was revealed via the concept of droplet terminal settling velocity and droplet stopping distance. The capture efficiency for optimal parameters determined by MATLAB calculations was 67 %, which was further enhanced to 74 % by adjusting the spray angle or reducing the gas velocity. CFD simulations of the spray column underlined the necessity of two-way coupled simulations as the spray significantly affects the gas flow and causes, among other things, back-mixing behavior. Droplet stopping distances were longer than those in MAT-LAB calculations, with discrepancies increasing alongside the liquid-to-gas ratio. The evaporative effect was minimal, as the gas quickly became saturated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20400 - Chemical engineering

Projekt

<a href="/cs/project/GA22-17806S" target="_blank" >GA22-17806S: Pokročilé systémy s kapalnými filmy a spreji pro čištění a sorpci plynů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW

ISSN

0301-9322

e-ISSN

1879-3533

Svazek periodika

193

Číslo periodika v rámci svazku

dec 2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

1-16

Kód UT WoS článku

001548943900001

EID výsledku v databázi Scopus

2-s2.0-105012951186