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Chemistry and Industry of Forest Products ›› 2022, Vol. 42 ›› Issue (3): 1-9.doi: 10.3969/j.issn.0253-2417.2022.03.001

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Preparation of Copper Loaded Activated Carbon and Its Adsorption Performance of Gaseous Benzene

Zhou XU, Wei LI, Shouxin LIU()   

  1. Key Laboratory of Bio-based Material Science & Technology, Ministry of Education; Northeast Forestry University, Harbin 150040, China
  • Received:2021-04-13 Online:2022-06-28 Published:2022-07-04
  • Contact: Shouxin LIU E-mail:liushouxin@126.com


The modified coconut shell activated carbons were prepared by loading CuCl2, carbonization and CO2 activation. The Cu-loaded activated carbons were labeled as AC3, AC4, AC5, and AC7 to represent the mass fractions of cupric salt solutions 0.3%, 0.4%, 0.5% and 0.7%, respectively. The Cu-loaded activated carbons were characterized by means of N2 adsorption isotherm, SEM, XRD and XPS. Their dynamic adsorption-desorption performance was measured by the gravimetric method. After modification, the acidic oxygenated groups on the surface of activated carbon decreased. The results showed that cupric salt existed in two forms, i.e., CuO and Cu2O. It was found that the presence of Cu loading led to the decreasing of surface area and pore volume of modified sample, and the increasing of the surface area and proportion of micropore. AC5 showed the largest values of the surface area(733.20 m2/g) and proportion(72.99%) of micropore. Furthermore, AC5 had the optimal equilibrium adsorption capacity(356.40 mg/g) which increased by 33.38% compared to the raw sample, and the optimal equilibrium adsorption time(118.80 min) which increased by 33.38%. Moreover, the adsorption performance of AC5 was better than the activated carbons in the organic gas filter cartridge(3M-3301 CN and 3M-6001 CN). After five cycles of adsorbents regeneration test, 80% of adsorption capability was still able to be reserved. The Cu-loaded activated carbons improved the adsorption performance by transforming the style from physical adsorption to physical-chemical adsorption through complexation of π-bonds in benzene with hollow d-orbitals in Cu2+.

Key words: activated carbon, copper oxide, gaseous benzene, adsorption, regeneration

CLC Number: