Air gasification of dried sewage sludge in a two-stage gasifier: Part 1. The effects and reusability of additives on the removal of tar and hydrogen production

作者：Mun Tae Young; Kim Jin Won; Kim Joo Sik^*

来源：International Journal of Hydrogen Energy, 2013, 38(13): 5226-5234.

DOI：10.1016/j.ijhydene.2012.10.120

• Dried sewage sludge
• Gasification
• Two-stage gasifier
• Tar removal
• Hydrogen
• Additives

Air gasification of dried sewage sludge was conducted in a two-stage gasifier. In the experiments, natural occurring materials, such as natural zeolite, olivine and dolomite, as well as biomass-based and coal-based activated carbons, were applied to the upper reactor of a two-stage gasifier, while sand and calcined dolomite were used as the fluidized bed material in the lower reactor. The reusability of the spent coal-based activated carbon and spent calcined dolomite was also investigated. The combination of calcined dolomite as the bed material and coal-based activated carbon in the upper reactor produced the highest H-2 (28 vol.%) and CO (21 vol.%) contents. Furthermore, total amount of tar generated with the combination was 91% less than that generated with no additive in the upper reactor and sand in the lower reactor. The H-2 content and tar removal efficiencies in the experiments with the spent activated carbons and spent calcined dolomites were shown to;be better than those without additives in the upper reactor.

• 出版日期2013-5-1