TY - JOUR
T1 - Removal of heat stable salts from aqueous MDEA solution via electrosorption using carbon-based electrodes
AU - Durrani, Madeeha
AU - Abu Haija, Mohammad
AU - Vengatesan, Muthukumaraswamy Rangaraj
AU - Zain, Jerina
AU - Alhseinat, Emad
AU - Banat, Fawzi
N1 - Funding Information:
This research was supported by Khalifa University (Gas Research Center) under grant number GRC15005 . The authors would like to thank Dr. Nader Ayish for proofreading the article.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/6
Y1 - 2019/6
N2 - Capacitive Deionization (CDI), an emerging desalination technique, was explored for the removal of heat stable salts (HSS) from the industrial lean methyldiethanolamine (MDEA) solutions. Various carbon-based materials, commercially available and synthetically prepared, were screened for the CDI application. Among different biochar materials, biochar prepared from date palm was the most efficient material for the removal of HSS. The activated biochar from date palm prepared at 550 °C (DPAC550) showed the highest HSS removal with about 20% removal efficiency. The date palm activated carbon was characterized by BET, XRD, SEM, FTIR and Elemental Analysis. Kinetic studies were also performed to determine the uptake capacity of DPAC550. The kinetic studies revealed that the electrosorption of HSS by DPAC550 followed pseudo-first order model. Electrochemical analysis supported the electrosorption behavior of DPAC550 which exhibited a specific capacitance of 269 F g−1 at 10 mV s−1 in 6 M KOH solution. This study clearly demonstrated the potential application of biochar electrodes for the removal of HSS from aqueous MDEA solutions using CDI cells.
AB - Capacitive Deionization (CDI), an emerging desalination technique, was explored for the removal of heat stable salts (HSS) from the industrial lean methyldiethanolamine (MDEA) solutions. Various carbon-based materials, commercially available and synthetically prepared, were screened for the CDI application. Among different biochar materials, biochar prepared from date palm was the most efficient material for the removal of HSS. The activated biochar from date palm prepared at 550 °C (DPAC550) showed the highest HSS removal with about 20% removal efficiency. The date palm activated carbon was characterized by BET, XRD, SEM, FTIR and Elemental Analysis. Kinetic studies were also performed to determine the uptake capacity of DPAC550. The kinetic studies revealed that the electrosorption of HSS by DPAC550 followed pseudo-first order model. Electrochemical analysis supported the electrosorption behavior of DPAC550 which exhibited a specific capacitance of 269 F g−1 at 10 mV s−1 in 6 M KOH solution. This study clearly demonstrated the potential application of biochar electrodes for the removal of HSS from aqueous MDEA solutions using CDI cells.
KW - Biochar
KW - Capacitive deionization
KW - Heat stable salts
KW - Isotherms
KW - MDEA amine
KW - Natural gas sweetening units
UR - http://www.scopus.com/inward/record.url?scp=85064449490&partnerID=8YFLogxK
U2 - 10.1016/j.ijggc.2019.02.019
DO - 10.1016/j.ijggc.2019.02.019
M3 - Article
AN - SCOPUS:85064449490
SN - 1750-5836
VL - 85
SP - 166
EP - 173
JO - International Journal of Greenhouse Gas Control
JF - International Journal of Greenhouse Gas Control
ER -