›› 2007, Vol. 7 ›› Issue (6): 1071-1076.

• 反应与分离 •

CuO/Al2O3吸附SO2后的氢再生及一体化回收硫磺：表征与机理

1. 中国科学院山西煤炭化学研究所，煤转化国家重点实验室
• 出版日期:2007-12-20 发布日期:2007-12-20

Regeneration of SO2-adsorbed CuO/Al2O3 with H2 and Recovery of Elemental Sulfur

ZHAO You-hua,LIU Zhen-yu,JIA Zhe-hua

1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences
• Online:2007-12-20 Published:2007-12-20

Abstract: SO2-adsorbed CuO/Al2O3 can be regenerated with H2 through recycling the tail gas back into the reactor. The temperature-programmed regeneration experiments are carried out in a thermogravimetric analyzer to study Cu and S phase changes during tail gas recycling process. The existence of peaks in the DTG curve at 280 and 330℃, respectively, shows that CuSO4 formed during the SO2 removal transforms to CuO and then Cu, while the result of XPS characterization shows that CuS in the adsorbent is produced by the reaction of SO2 and Cu. An elemental sulfur yield of above 50% can be obtained in the sulfur recovery process at 400℃ with an H2/SO2 molar ratio of 1.5, which shows that CuS formed in the H2 regeneration of CuO/Al2O3 is the catalyst for elemental sulfur production.