TY - JOUR
T1 - Post-combustion CO2 capture and recovery by pure activated methyldiethanolamine in crossflow membrane contactors having coated hollow fibers
AU - Akan, Aytac Perihan
AU - Chau, John
AU - Sirkar, Kamalesh K.
N1 - Funding Information:
This study is based on the first author’s PhD thesis, which was carried out under the third author’s co-supervision at New Jersey Institute of Technology ( NJIT ), Department of Chemical and Materials Engineering, Newark, NJ, USA. Aytac Perihan Akan was financially supported by The Scientific and Technological Research Council of Turkey (TUBITAK) with 2214A-fellowship to implement her studies at NJIT , USA.
Funding Information:
This study is based on the first author's PhD thesis, which was carried out under the third author's co-supervision at New Jersey Institute of Technology (NJIT), Department of Chemical and Materials Engineering, Newark, NJ, USA. Aytac Perihan Akan was financially supported by The Scientific and Technological Research Council of Turkey (TUBITAK) with 2214A-fellowship to implement her studies at NJIT, USA.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/8/1
Y1 - 2020/8/1
N2 - Gas absorption and stripping using membrane contactors is one of a number of carbon capture and storage technologies being investigated for separating CO2 from flue gas. Energy consumption in CO2 absorption-stripping employing amine-containing aqueous absorbent solutions is strongly influenced by demanding stripping conditions involving higher temperatures. The utility of using pure methyldiethanolamine (MDEA) activated by piperazine as a reactive absorbent was studied using a compact hollow fiber device for the absorber as well as the stripper. Water needed for reactive absorption of CO2 in tertiary amine MDEA was obtained from simulated humidified flue gas stream which is saturated with moisture in actual practice. This study investigated also the absorption and stripping performances of aqueous absorbent solutions containing 80% and 90% activated MDEA (aMDEA). Considerable CO2 stripping from CO2-loaded pure aMDEA absorbent was achieved at 92 °C while absorption was carried out at 25–46 °C. Further, the CO2 stripping rate was far higher for pure MDEA compared to the other two aMDEA solutions with water. Results are reported for the performance of the absorption-stripping process as a function of humidified simulated flue gas flow rate and the absorbent flow rate. High values of the overall mass transfer coefficients (MTCs) have also been reported for absorption. The highest volumetric gas phase based overall MTC obtained was 0.504 sec−1. This system has a much lower absorbent circulation load, eliminates the energy needed to heat and evaporate water present in aqueous absorbent solutions and benefits from the absence of excess water during stripping.
AB - Gas absorption and stripping using membrane contactors is one of a number of carbon capture and storage technologies being investigated for separating CO2 from flue gas. Energy consumption in CO2 absorption-stripping employing amine-containing aqueous absorbent solutions is strongly influenced by demanding stripping conditions involving higher temperatures. The utility of using pure methyldiethanolamine (MDEA) activated by piperazine as a reactive absorbent was studied using a compact hollow fiber device for the absorber as well as the stripper. Water needed for reactive absorption of CO2 in tertiary amine MDEA was obtained from simulated humidified flue gas stream which is saturated with moisture in actual practice. This study investigated also the absorption and stripping performances of aqueous absorbent solutions containing 80% and 90% activated MDEA (aMDEA). Considerable CO2 stripping from CO2-loaded pure aMDEA absorbent was achieved at 92 °C while absorption was carried out at 25–46 °C. Further, the CO2 stripping rate was far higher for pure MDEA compared to the other two aMDEA solutions with water. Results are reported for the performance of the absorption-stripping process as a function of humidified simulated flue gas flow rate and the absorbent flow rate. High values of the overall mass transfer coefficients (MTCs) have also been reported for absorption. The highest volumetric gas phase based overall MTC obtained was 0.504 sec−1. This system has a much lower absorbent circulation load, eliminates the energy needed to heat and evaporate water present in aqueous absorbent solutions and benefits from the absence of excess water during stripping.
KW - Absorption and stripping
KW - Hollow fiber membrane
KW - Membrane contactor
KW - Post-combustion CO capture
KW - Pure methyldiethanolamine/piperazine
UR - http://www.scopus.com/inward/record.url?scp=85083215595&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85083215595&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2019.116427
DO - 10.1016/j.seppur.2019.116427
M3 - Article
AN - SCOPUS:85083215595
SN - 1383-5866
VL - 244
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 116427
ER -