Sewage Sludge Gasification Characteristics and Kinetics Using Iron Bearing Metallurgical Slag as Heat Carrier
Waste heat recovery is a key problem for metallurgical slag. The heat source acquisition is current bottleneck for sewage sludge gasification technology. By using the waste heat of slag, granulation and waste heat recovery technology system is proposed. The sludge gasification kinetics were studied with CO 2 as oxidation agent, analyzed by thermogravimetry (TG). The active catalysis components in both Cu and Ni slag was determined by X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). The results showed that the addition of metallurgical slag can improve the decomposition rate of sludge gasification reaction. The main catalytic component are Fe 3 O 4 and CaO for Cu slag and Ni slag. The conversion ratio was increased by 7.8 % and 11.8 % when using Cu slag and Ni slag as heat carrier respectively. With the heat carrier of Cu and Ni slag, activation energy decreased from 21.09 kJ/mol to 17.36 kJ/mol and 17.30 kJ/mol respectively. After oxidative modification, the catalytic effect on sludge gasification is enhanced for Cu slag and the effect is weakened for Ni slag. the catalytically active components changed to be Fe 2 O 3 and MgFe 2+3 O 4 in modified Cu slag
Year of publication: |
[2022]
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Authors: | Zuo, Zongliang ; Wang, Jinmeng ; Feng, Yan ; Luo, Siyi ; Dong, Xinjiang ; Zhang, Weiwei ; Ren, Dongdong ; Liu, Kaijie ; Wu, Yuxi ; Lin, Huan ; Sun, Shaojie |
Publisher: |
[S.l.] : SSRN |
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