Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7709046 | International Journal of Hydrogen Energy | 2017 | 9 Pages |
Abstract
The process of sewage sludge steam gasification can be divided into three stages: devolatilization, volatiles homogeneous reforming and heterogeneous catalyzing. This study investigated the direct and indirect impacts of Fe/Ca-based conditioners on syngas generation at different stages using a special decoupling reactor. The results show that the highest H2 production for raw sludge gasification was 190Â mL/g at 1273Â K. The maximum promotion of H2 yield was 51.2% for Fenton's reagent (Fe2++H2O2) addition at 1273Â K and 132.5% for CaO addition at 1073Â K. Among that, 52.8% and 62.9% of H2 increment was attributed to the catalytic effect on devolatilization stage respectively. Fenton oxidation was conducive to the conversion and fixation of protein structure while the corresponding organic matter in CaO-conditioned sludge was aromatics. The catalysis of volatile reforming was proven an important process, thus reusing char/ash as bed material or cracking catalysts maybe a promising method for hydrogen energy production.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Qiang Zhang, Huan Liu, Xiuju Zhang, Geng Lu, Jiaxing Wang, Hongyun Hu, Aijun Li, Hong Yao,