Further Experiments on Sewage Sludge Air Gasification: Influence of the Nonstationary Period on the Overall Results
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- 作者：Joan J. Manyà ; Marí ; a Aznar ; José ; L. Sá ; nchez ; Jesú ; s Arauzo ; M. Benita Murillo
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2006
- 出版时间：October 11, 2006
- 年：2006
- 卷：45
- 期：21
- 页码：7313 - 7320
- 全文大小：179K
- 年卷期：v.45,no.21(October 11, 2006)
- ISSN：1520-5045
文摘
In the present study, the gasification with air of dried sewage sludge (DSS) was experimentally investigatedusing a bubbling fluidized bed reactor. The experimental work analyzed the effect on the DSS gasificationtests of the gas residence time (as a function of both the bed height and the superficial air velocity) and thepotential catalytic role of the DSS ashes. Furthermore, the influence of the nonstationary period on theaccumulated tar production was analyzed. The results show that a longer gas residence time improves the gasefficiency process. A decrease in tar production and an increase in H2 content in the raw gas were observedwhen a mixture of sand and DSS ashes was used as an initial bed. These results confirm the catalytic effectof DSS ashes, which would be able for catalytic applications. The influence of the nonstationary period onthe accumulated tar production was minimized when the experiment length was extended. This finding couldconfirm the higher tar production during this period.