HCl(g) REMOVAL PERFORMANCE OF K<sub>2</sub>CO<sub>3</sub>-MODIFIED CAMGAL MIXED METAL OXIDES DERIVED FROM HYDROTALCITE-LIKE

WANG Tong-wei; JIN Bao-sheng; WU Wei; GU Qin-yang; WANG De-cheng

doi:10.13205/j.hjgc.202109015

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

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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

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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

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.
- hydrotalcite-like,
- potassium carbonate(K₂CO₃),
- removal,
- HCl(g) adsorbents,
- fixed-bed,

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References(23)

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