A study of the sulfidation and regeneration reaction cycles of Zn-Ti-based sorbents with different crystal structures

作者：Jung Suk Yong; Park Jung Je; Lee Soo Jea; Jun Hee Kwon; Lee Soo Chool; Kim Jae Chang^*

来源：Korean Journal of Chemical Engineering, 2010, 27(5): 1428-1434.

DOI：10.1007/s11814-010-0237-0

• Desulfurization
• Regeneration
• Sorbent
• Hot Coal Gas
• Crystal Structure
• Reaction Cycles

The reaction cycles of the sulfidation and regeneration of Zn-Ti-based sorbents prepared by a physical mixing method (ZT-700 and ZT-1000) or co-precipitation method (ZT-cp) were tested in a fixed bed micro-reactor at middle temperature (Sulfidation; 480 degrees C, regeneration; 580 degrees C). The ZnS produced during sulfidation from the Zn(2)TiO(4) with a spinel structure (ZT-1000, ZT-cp) was easily regenerated even at 550 degrees C, while the ZnS produced from the ZnO with a hexagonal structure (ZT-700) needed a temperature higher than 610 degrees C. After regeneration, each sorbent was restored to its original crystal structure. The differences in the regeneration properties and the reaction cycles of the sorbents were related to the original crystal structures rather than to the physical properties such as pore volume and surface area. To study these differences further, FT-IR, FT-Raman, XRD and TPR were used, and their results including the reaction cycles of the sulfidation and regeneration on the Zn-Ti based sorbents with different crystal structures were discussed.

• 出版日期2010-9