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Volume 39 Issue 9
Jan.  2022
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2021  >  39(9): 102-109
WANG Tong-wei, JIN Bao-sheng, WU Wei, GU Qin-yang, WANG De-cheng. HCl(g) REMOVAL PERFORMANCE OF K2CO3-MODIFIED CAMGAL MIXED METAL OXIDES DERIVED FROM HYDROTALCITE-LIKE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 102-109. doi: 10.13205/j.hjgc.202109015
Citation: WANG Tong-wei, JIN Bao-sheng, WU Wei, GU Qin-yang, WANG De-cheng. HCl(g) REMOVAL PERFORMANCE OF K2CO3-MODIFIED CAMGAL MIXED METAL OXIDES DERIVED FROM HYDROTALCITE-LIKE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 102-109. doi: 10.13205/j.hjgc.202109015
shu

HCl(g) REMOVAL PERFORMANCE OF K2CO3-MODIFIED CAMGAL MIXED METAL OXIDES DERIVED FROM HYDROTALCITE-LIKE

doi: 10.13205/j.hjgc.202109015

  • 1. Key Laboratory of Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;

  • 2. Nanjing Environment Group Co., Ltd, Nanjing 210026, China

  • Received Date: 2020-12-16
    Available Online: 2022-01-21
    Abstract
  • In this paper, the Ca-Mg-Al hydrotalcite-like was impregnated by K2CO3, and the derived mixed metal oxide adsorbent was obtained by further calcination. The fixed-bed experimental system was used to study the HCl(g) removal performance of K2CO3 modified hydrotalcite-like adsorbent at high temperature. The effects of K2CO3 content, reaction temperature and HCl(g) concentration on the removal of HCl(g) were investigated. The adsorbents were characterized by X-ray diffraction, specific surface area and pore analysis, scanning electron microscopy and thermogravimetric analysis. The results showed that:HCl(g) removal performance of hydrotalcite-like adsorbent modified by K2CO3 was significantly improved, and the optimum K2CO3 content was 30%. When the K2CO3 content exceeded 30%, the pore of adsorbent was blocked and the adsorption capacity was decreased. In the reaction temperature range of 400~800℃, the HCl(g) adsorption capacity of the adsorbent reached the maximum value of 0.289 g/g adsorbent at 600℃. After being calcined at 500℃, the specific surface area and pore volume of the adsorbent increased, the average pore size decreased, and the adsorption capacity was enhanced. The thermal stability of the hydrotalcite-like adsorbent was improved after impregnated by K2CO3. The high-temperature HCl(g) removal performance of K2CO3 modified hydrotalcite-like adsorbent was excellent, providing research directions for finding efficient and practical high-temperature HCl(g) removal adsorbents.
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    • References(23)
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