Hydrogen and syngas production from sewage sludge via steam gasification

High temperature steam gasification is an attractive alternative technology which can allow one to obtain high percentage of hydrogen in the syngas from low-grade fuels. Gasification is considered a clean technology for energy conversion without environmental impact using biomass and solid wastes as...

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Bibliographic Details
Published in:International journal of hydrogen energy 2010-11, Vol.35 (21), p.11738-11745
Main Authors: Nipattummakul, Nimit, Ahmed, Islam I., Kerdsuwan, Somrat, Gupta, Ashwani K.
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Clean syngas
Direct power generation
Energy
Exact sciences and technology
Foods
Fuels
Gasification
Hydrogen
Hydrogen yield
Pyrolysis
Sewage sludge
Steam gasification
Waste-to-clean energy
Wastes
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Summary:High temperature steam gasification is an attractive alternative technology which can allow one to obtain high percentage of hydrogen in the syngas from low-grade fuels. Gasification is considered a clean technology for energy conversion without environmental impact using biomass and solid wastes as feedstock. Sewage sludge is considered a renewable fuel because it is sustainable and has good potential for energy recovery. In this investigation, sewage sludge samples were gasified at various temperatures to determine the evolutionary behavior of syngas characteristics and other properties of the syngas produced. The syngas characteristics were evaluated in terms of syngas yield, hydrogen production, syngas chemical analysis, and efficiency of energy conversion. In addition to gasification experiments, pyrolysis experiments were conducted for evaluating the performance of gasification over pyrolysis. The increase in reactor temperature resulted in increased generation of hydrogen. Hydrogen yield at 1000 °C was found to be 0.076 g gas g sample −1. Steam as the gasifying agent increased the hydrogen yield three times as compared to air gasification. Sewage sludge gasification results were compared with other samples, such as, paper, food wastes and plastics. The time duration for sewage sludge gasification was longer as compared to other samples. On the other hand sewage sludge yielded more hydrogen than that from paper and food wastes.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2010.08.032