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中南大学学报(英文版)

Journal of Central South University

Vol. 22    No. 8    August 2015

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Comparison of desulfurization kinetics of copper oxide sorbent
YU Qing-chun(郁青春)1, 2, DENG Yong(邓勇)1, 2, WANG Fei(王飞)1, 2, FENG Yue-bin(冯跃斌)3, YANG Bin(杨斌)1, 2, XU Bao-qiang(徐宝强)1, 2, LIU Da-chun(刘大春)1, 2

1. National Engineering Laboratory for Vacuum Metallurgy,
Key Laboratory of Vacuum Metallurgy for Non-ferrous Metal of Yunnan Province,
State Key Laboratory of Complex Non-ferrous Metal Resources Clear Utilization,
Kunming 650093, China;
2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,
Kunming 650093, China
3. Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China

Abstract:Desulfurization experiments of CuO, γ-Al2O3 and CuO/γ-Al2O3 were made in simulated flue gas by means of thermogravimetric analysis. It is found that reaction activities of CuO supported on γ-Al2O3 could be highly improved. Desulfurization kinetics of CuO/γ-Al2O3 was studied in the temperature range of 250 °C-400 °C and SO2 concentration of 0.1%-0.9%. The experimental data were tested and compared with kinetics models of volume reaction model (VRM), grain size model (GSM), random pore model (RPM) and pore-blocking model (PBM). Correlation analysis shows that VRM and RPM models do not fit experimental data well. GSM contradicts with the changes in the physical and chemical properties of CuO/γ-Al2O3 as the desulfurization proceeds. It is found that PBM is consistent with the change of pore structure of CuO/γ-Al2O3 sorbent during desulfurization process and predicts the conversion-time curves of the sorbent well. Meanwhile, kinetics parameters are obtained and discussed.

 

Key words: copper oxide; desulfurization; kinetics; γ-Al2O3

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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