Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (4): 20210824.doi: 10.7503/cjcu20210824

• Inorganic Chemistry • Previous Articles     Next Articles

Activation of Biochar from Cattail and the VOCs Adsorption Application

WANG Hongning1, HUANG Li1, QING Jiang3, MA Tengzhou3, JIANG Wei3, HUANG Weiqiu2, CHEN Ruoyu1   

  1. 1.Jiangsu Province Key Laboratory of Fine Petrochemical Engineering,Changzhou University,Changzhou 213164,China
    2.Jiangsu Key Laboratory of Oil and Gas Storage and Transport Technology,Changzhou University,Changzhou 213016,China
    3.Technical Center for Industrial Product and Raw Material Inspection and Testing,Shanghai Customs,Shanghai 200135,China
  • Received:2021-12-07 Online:2022-04-10 Published:2022-03-04
  • Contact: CHEN Ruoyu, HUANG Weiqiu, JIANG Wei E-mail:chry@cczu.edu.cn;hwq213@cczu.edu.cn;willjiang@263.com
  • Supported by:
    the National Key Research and Development Program of China(2019YFC0810905);the National Natural Science Foundations of China(52174058);the Programme of General Administration of Customs, China(200HK251)

Abstract:

Biochar was achieved by using cattail as raw material and activated with different agents. The specific surface area and pore volume of biochar before activation was very small, 1.71 m2/g and 0.00421 cm3/g, respectively, and they were greatly increased after activation. The biochar activated by Na2CO3 has the best surface area and pore volume. At the same time, the effects of different mass ratios of Na2CO3 and Biochar on the activation of Biochar were studied, and the optimal mass ratio of activation was determined. When mass ratio of Na2CO3/Biochar is 3∶1, the synthesized dample(Biochar-Na2CO3-3) has the biggest specific surface area and pore volume(624 m2/g and 0.211 cm3/g), which has excellent adsorption performance of volatile organic compounds(VOCs). The static n-hexane, toluene and No.92 gasoline adsorption capacities of Biochar-Na2CO3-3 are 1.03, 0.814 and 0.751 g/g, respectively. The dynamic n-hexane and toluene adsorption capacities of Biochar-Na2CO3-3 are 1.00 and 0.796 g/g, respectively. The adsorption performance is stable, which is better than the commercial activated carbon(AC) and silica gel(SG).

Key words: Biochar, Activation, Volatile organic compoundes(VOCs), Adsorption-desorption, Stability

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