Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5146192 | International Journal of Hydrogen Energy | 2017 | 6 Pages |
Abstract
A series of wet sludge samples with different moisture contents were pyrolyzed in situ steam in a bench-scale fixed bed reactor in order to examine the influence of moisture and temperature on product distribution and gas composition. The results demonstrated that inherent moisture in wet sludge had a great effect on the product yield. The pyrolysis of wet sludge (43.38% moisture content) at 800 °C exhibited maximum H2 yield (7.76 mol kgâ1 dry basis wet sludge) and dry gas yield (0.61 Nm3 kgâ1) and H2 content of 42.13 vol%. When the moisture exceeded 43.38%, H2 yield and gas yield both tended to decline. It was also shown that the elevated temperature exhibited a significant influence on gas content increase and tar reduction; at the same time, H2 yield and H2 content were increased from 1.83 mol kgâ1 dry basis wet sludge and 16.67 vol% to 9.15 mol kgâ1 dry basis wet sludge and 45.67 vol%, respectively, as temperature increased from 600 °C to 850 °C. LHV of fuel gas varies from 15.49 MJ Nmâ3 to 11.65 MJ Nmâ3 because of decrease in CH4 and C2H4 content as temperature increasing. In conclusion, hydrogen rich gas production by pyrolysis of wet sludge which avoided pre-drying process and utilized in situ steam agent from wet sludge is an economic method.
Keywords
Related Topics
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Chemistry
Electrochemistry
Authors
Siyi Luo, Jianxiang Guo, Yu Feng,