Study on the nitrogen transformation during the primary pyrolysis of sewage sludge by Py-GC/MS and Py-FTIR |
| |
| Authors: | Peng Zhou Sijiang Xiong Yuxuan Zhang Hua Jiang Yongchao Chi Lei Li |
| |
| Affiliation: | 1. Appraisal Center for Environment & Engineering, Ministry of Environmental Protection, Beijing 100012, China;2. Key Laboratory of Thermal Science and Power Engineering, Tsinghua University, Beijing 100084, China;3. Division of Advanced Nuclear Energy Technology, State Power Investment Central Research Institute, Beijing 102209, China;4. Beijing Municipal Institute of Labour Protection, Beijing 100054, China |
| |
| Abstract: | The nitrogen transformation with attention to the intermediates and NOx precursors has been investigated during the primary pyrolysis of sewage sludge by using Pyrolyzer-gas chromatography/mass spectrometry (Py-GC/MS) and Pyrolyzer-Fourier transform infrared spectrometry (Py-FTIR). A three-stage process of nitrogen transformation during the sewage sludge pyrolysis was suggested. The decomposition of labile protein and inorganic ammonium salt mainly occurred in the first stage (<300 °C), giving rise to a small amount of NH3. In the second stage (300–600 °C), the macromolecular protein firstly cracked into small molecular amine compounds, and then went through deamination process, contributed to a large release of NH3. In the third stage (600–900 °C), the amine compounds converted into nitriles, and generated a large amount of HCN, while the formation of NH3 slowed down accordingly. |
| |
| Keywords: | Sewage sludge Pyrolysis Nitrogen transformation Py-GC/MS Py-FTIR |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
