TY - JOUR
T1 - New strategy to prepare ultramicroporous carbon by ionic activation for superior CO2 capture
AU - Liu, Zhen
AU - Zhang, Zhen
AU - Jia, Zhijiao
AU - Zhao, Liang
AU - Zhang, Tingting
AU - Xing, Wei
AU - Komarneni, Sridhar
AU - Subhan, Fazle
AU - Yan, Zifeng
N1 - Funding Information:
This work was financially supported by National Natural Science Foundation of China ( U1362202 , 21476264 and 21650110460 ), Taishan Scholar Foundation ( tsqn20161017 ) and Natural Science Foundation of Shandong Province ( ZR2017QB007 ).
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - Traditional chemical activation methods to prepare porous carbons adsorbents consume large amounts of activating agent through physical mixing. Herein, we developed a new strategy to prepare microporous carbons with uniform ultramicropores (∼0.57 nm) through ionic activation method by using potassium carboxylate as an activating agent, which was uniformly incorporated onto the surface of hydrothermally prepared hydrochar. The ultramicroporous carbon adsorbent developed by this new method showed high CO2 uptakes of 5.87 and 3.82 mmol g−1 at 0 and 25 °C, respectively. We demonstrated that small amounts of uniformly distributed potassium carboxylate contributed to the development of ultramicroporosity. This research paves the way for a new route to prepare ultramicroporous carbons as efficient CO2 adsorbents by using significantly lower amounts of activating agents and hence the process may be not only cost-effective but also avoids negative impacts of traditional chemical activation.
AB - Traditional chemical activation methods to prepare porous carbons adsorbents consume large amounts of activating agent through physical mixing. Herein, we developed a new strategy to prepare microporous carbons with uniform ultramicropores (∼0.57 nm) through ionic activation method by using potassium carboxylate as an activating agent, which was uniformly incorporated onto the surface of hydrothermally prepared hydrochar. The ultramicroporous carbon adsorbent developed by this new method showed high CO2 uptakes of 5.87 and 3.82 mmol g−1 at 0 and 25 °C, respectively. We demonstrated that small amounts of uniformly distributed potassium carboxylate contributed to the development of ultramicroporosity. This research paves the way for a new route to prepare ultramicroporous carbons as efficient CO2 adsorbents by using significantly lower amounts of activating agents and hence the process may be not only cost-effective but also avoids negative impacts of traditional chemical activation.
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U2 - 10.1016/j.cej.2017.11.184
DO - 10.1016/j.cej.2017.11.184
M3 - Article
AN - SCOPUS:85039165361
SN - 1385-8947
VL - 337
SP - 290
EP - 299
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -