Potassium Tethered Carbons with Unparalleled Adsorption Capacity and Selectivity for Low-Cost Carbon Dioxide Capture from Flue Gas

Hongyu Zhao; Lei Shi; Zhongzheng Zhang; Xiaona Luo; Lina Zhang; Qun Shen; Shenggang Li; Haijiao Zhang; Nannan Sun; Wei Wei; Yuhan Sun

doi:10.1021/acsami.7b14418

journal article·2018-01-31

Potassium Tethered Carbons with Unparalleled Adsorption Capacity and Selectivity for Low-Cost Carbon Dioxide Capture from Flue Gas

Hongyu Zhao, Lei Shi, Zhongzheng Zhang, Xiaona Luo, Lina Zhang, Qun Shen, Shenggang Li, Haijiao Zhang, Nannan Sun, Wei Wei, Yuhan Sun

ACS Applied Materials & Interfaces· Volume 10· Issue 4

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Source abstract

Abstract

Carbons are considered less favorable for postcombustion CO 2 capture because of their low affinity toward CO 2, and nitrogen doping was widely studied to enhance CO 2 adsorption, but the results are still unsatisfactory. Herein, we report a simple, scalable, and controllable strategy of tethering potassium to a carbon matrix, which can enhance carbon–CO 2 interaction effectively, and a remarkable working capacity of ca. 4.5 wt % under flue gas conditions was achieved, which is among the highest for carbon-based materials. More interestingly, a high CO 2 /N 2 selectivity of 404 was obtained. Density functional theory calculations evidenced that the introduced potassium carboxylate moieties are responsible for such excellent performances. We also show the effectiveness of this strategy to be universal, and thus, cheaper precursors can be used, holding great promise for low-cost carbon capture from flue gas.

Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Carbon Dioxide Capture Technologies · Membrane Separation and Gas Transport · Inorganic Fluorides and Related Compounds

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China

School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China

Funding

Natural Science Foundation of Shanghai · Chinese Academy of Sciences

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