title: Highly Cost-Effective Nitrogen-Doped Porous Coconut Shell-Based CO2 Sorbent Synthesized by Combining Ammoxidation with KOH Activation.
abstract: The objective of this research is to develop a cost-effective carbonaceous CO2 sorbent. Highly nanoporous N-doped carbons were synthesized with coconut shell by combining ammoxidation with KOH activation. The resultant carbons have characteristics of highly developed porosities and large nitrogen loadings. The prepared carbons exhibit high CO2 adsorption capacities of 3.44-4.26 and 4.77-6.52 mmol/g at 25 and 0 °C under atmospheric pressure, respectively. Specifically, the sample NC-650-1 prepared under very mild conditions (650 °C and KOH/precursor ratio of 1) shows the CO2 uptake 4.26 mmol/g at 25 °C, which is among the best of the known nitrogen-doped porous carbons. The high CO2 capture capacity of the sorbent can be attributed to its high microporosity and nitrogen content. In addition, the CO2/N2 selectivity of the sorbent is as high as 29, higher than that of many reported CO2 sorbents. Finally, this N-doped carbon exhibits CO2 heats of adsorption as high as 42 kJ/mol. The multiple advantages of these cost-effective coconut shell-based carbons demonstrate that they are excellent candidates for CO2 capture.
authors.affiliation: †College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China.
authors.forename: Mingli
authors.initials: M
authors.lastname: Yang
authors.affiliation: †College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China.
authors.forename: Liping
authors.initials: L
authors.lastname: Guo
authors.affiliation: ‡Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, P. R. China.
authors.forename: Gengshen
authors.initials: G
authors.lastname: Hu
authors.affiliation: †College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Hu
authors.affiliation: †College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China.
authors.forename: Leqiong
authors.initials: L
authors.lastname: Xu
authors.affiliation: †College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China.
authors.forename: Jie
authors.initials: J
authors.lastname: Chen
authors.affiliation: †College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Dai
authors.affiliation: §Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, Wyoming 82071, United States.
authors.forename: Maohong
authors.initials: M
authors.lastname: Fan
mesh_terms: D000327:Adsorption; D000641:Ammonia / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D003059:Cocos / Q000737:chemistry*; D003362:Cost-Benefit Analysis; D006878:Hydroxides / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D016062:Porosity; D017680:Potassium Compounds / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
chemical_list: D006878:Hydroxides; D017680:Potassium Compounds; D002245:Carbon Dioxide; D000641:Ammonia; D009584:Nitrogen; C029943:potassium hydroxide