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Experimental investigation of CO2 removal using Piperazine solution in a stirrer bubble column
HighlightsSauter mean diameter and gas holdup decrease with increasing Pz concentration.CO2 removal efficiency increase with increasing liquid volume flow rate.The increase of stirrer speed the bubbles become smaller and decrease the loading.The KG conduct on the systems was explained based on specific gas-liquid area.CO2 absorption rate was increased with stirring speed up to 200rpm.
AbstractIn the present work, absorption of carbon dioxide into Piperazine solution was investigated experimentally in a pilot scale stirrer bubble column. In the experiments, mass transfer and hydrodynamics parameters including loading, removal efficiency, absorption flux and mass transfer coefficients at various volumetric liquid and CO2 flow rate, absorbent concentration, and stirrer speed were studied. The experiments were carried out at 295.15K temperature and atmospheric pressure under the Piperazine concentration in range of 0.1–0.5moll−1, CO2 partial pressure range 16.0–35.2kPa, stirrer speed range in range of 0–300rpm and liquid flow rate in range of 0.5–2.0lh−1.The results showed that mass transfer flux, overall mass transfer coefficient, driving force and CO2removal efficiency were varied in the range of (6.18–15.99)×10−6 kmolm−2s−1, (2.39–2.58)×10−6 kmolm−2s−1kPa−1, 200–1400Pa, and 65.5–82.1%, respectively. The hydrodynamics studies indicate that the gas holdups and the Sauter mean diameter in the bubble column increase with increasing CO2 partial pressure. CO2 partial pressure influence depends on the Piperazine concentration. This positive influence of partial pressure emanates from the smaller bubbles formation. Also increasing the CO2 partial pressure in the range of 16.0–35.2kPa, increases the gas holdup and Sauter mean diameter up to about 48%.
Experimental investigation of CO2 removal using Piperazine solution in a stirrer bubble column
HighlightsSauter mean diameter and gas holdup decrease with increasing Pz concentration.CO2 removal efficiency increase with increasing liquid volume flow rate.The increase of stirrer speed the bubbles become smaller and decrease the loading.The KG conduct on the systems was explained based on specific gas-liquid area.CO2 absorption rate was increased with stirring speed up to 200rpm.
AbstractIn the present work, absorption of carbon dioxide into Piperazine solution was investigated experimentally in a pilot scale stirrer bubble column. In the experiments, mass transfer and hydrodynamics parameters including loading, removal efficiency, absorption flux and mass transfer coefficients at various volumetric liquid and CO2 flow rate, absorbent concentration, and stirrer speed were studied. The experiments were carried out at 295.15K temperature and atmospheric pressure under the Piperazine concentration in range of 0.1–0.5moll−1, CO2 partial pressure range 16.0–35.2kPa, stirrer speed range in range of 0–300rpm and liquid flow rate in range of 0.5–2.0lh−1.The results showed that mass transfer flux, overall mass transfer coefficient, driving force and CO2removal efficiency were varied in the range of (6.18–15.99)×10−6 kmolm−2s−1, (2.39–2.58)×10−6 kmolm−2s−1kPa−1, 200–1400Pa, and 65.5–82.1%, respectively. The hydrodynamics studies indicate that the gas holdups and the Sauter mean diameter in the bubble column increase with increasing CO2 partial pressure. CO2 partial pressure influence depends on the Piperazine concentration. This positive influence of partial pressure emanates from the smaller bubbles formation. Also increasing the CO2 partial pressure in the range of 16.0–35.2kPa, increases the gas holdup and Sauter mean diameter up to about 48%.
Experimental investigation of CO2 removal using Piperazine solution in a stirrer bubble column
Pashaei, Hassan (author) / Ghaemi, Ahad (author) / Nasiri, Masoud (author)
International Journal of Greenhouse Gas Control ; 63 ; 226-240
2017-05-09
15 pages
Article (Journal)
Electronic Resource
English