Importance of atomizer choice for CO2 capture in spray columns

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F25%3APU155143" target="_blank" >RIV/00216305:26210/25:PU155143 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0016236124032290" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0016236124032290</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fuel.2024.134078" target="_blank" >10.1016/j.fuel.2024.134078</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Importance of atomizer choice for CO2 capture in spray columns

Popis výsledku v původním jazyce

CO2 is one of the most severe greenhouse gases released into the atmosphere and is responsible for increasing global temperatures. Post-combustion CO2 capture can reduce the amount of CO2 released. Spray columns, as simple gas cleaning reactors, can utilize different types of atomizers. The CO2 capture process requires well- tailored spray characteristics, such as suitable mean drop size and drop size distribution, droplet density, spray cone angle, and droplet velocity. Small droplets are prone to be carried away by ambient flow causing significant sorbent losses, while large droplets have a small surface area, which limits the rate of CO2 mass transfer. This paper compares pressure-swirl, flat-fan, twin-fluid, and showerhead atomizers operated at a constant solvent flow rate of 140 kg/h. Atomizer rescaling was used to change the liquid pressure. Droplet sizes were probed with a high-resolution shadowgraph sizer. Absorption tests were carried out on a laboratory-scale spray tower with a diameter of 0.2 m and a height of 2.5 m. The absorption liquid was a 30 wt% monoethanolamine (MEA) solution, and the modeled flue gas contained a 10% CO2 mole fraction. The absorption efficiency systematically increased with a reduction in Sauter mean diameter (D32), i.e. with atomizer input energy. Pressure loss in the spray column is directly proportional to absorption efficiency. Effervescent atomizers achieved the worst energy efficiency and the largest fraction of droplets carried away by the ambient flow, resulting in significant sorbent loss. Flat-fan and pressure-swirl types were found to be excellent all-round atomizers.

Název v anglickém jazyce

Importance of atomizer choice for CO2 capture in spray columns

Popis výsledku anglicky

CO2 is one of the most severe greenhouse gases released into the atmosphere and is responsible for increasing global temperatures. Post-combustion CO2 capture can reduce the amount of CO2 released. Spray columns, as simple gas cleaning reactors, can utilize different types of atomizers. The CO2 capture process requires well- tailored spray characteristics, such as suitable mean drop size and drop size distribution, droplet density, spray cone angle, and droplet velocity. Small droplets are prone to be carried away by ambient flow causing significant sorbent losses, while large droplets have a small surface area, which limits the rate of CO2 mass transfer. This paper compares pressure-swirl, flat-fan, twin-fluid, and showerhead atomizers operated at a constant solvent flow rate of 140 kg/h. Atomizer rescaling was used to change the liquid pressure. Droplet sizes were probed with a high-resolution shadowgraph sizer. Absorption tests were carried out on a laboratory-scale spray tower with a diameter of 0.2 m and a height of 2.5 m. The absorption liquid was a 30 wt% monoethanolamine (MEA) solution, and the modeled flue gas contained a 10% CO2 mole fraction. The absorption efficiency systematically increased with a reduction in Sauter mean diameter (D32), i.e. with atomizer input energy. Pressure loss in the spray column is directly proportional to absorption efficiency. Effervescent atomizers achieved the worst energy efficiency and the largest fraction of droplets carried away by the ambient flow, resulting in significant sorbent loss. Flat-fan and pressure-swirl types were found to be excellent all-round atomizers.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20700 - Environmental engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

FUEL

ISSN

0016-2361

e-ISSN

1873-7153

Svazek periodika

385

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

001394524600001

EID výsledku v databázi Scopus

2-s2.0-85212848566