Influence of Fe2O3 on Release Mechanism of NH3 and Other Nitrogen-Containing Compounds from Pyrolysis of Three Typical Amino Acids in Urban Sludge

• 作者: XU Lianlian YANG Zaifu
• 来源期刊: 东华大学学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Green Textile Chemistry
• 页码范围: 294-303
• 页数: 10页
• 分类号: TK6
• 语种: 英文
• DOI: 10.19884/j.1672-5220.202101002

摘要

To elucidate the effects of Fe2O3 on nitrogen transformation during sludge pyrolysis,thermogravimetry coupled with mass spectrometry(TG-MS)was used to investigate the influences of Fe2O3 on the pyrolysis characteristics and the release of important gaseous NOx precursors such as HCN and NH3 during pyrolysis of three typical amino acids in urban sludge.The results show that after Fe2O3 addition,the total weight loss rate of the three amino acids and the initial decomposition temperature of proline are reduced.The release amounts of NH3,HCN,CH3CN,and HNCO from these three representative amino acids—glumatic,arginine,and proline,decrease in the order of arginine,glutamic,proline.The generation of Fe-N complexes,reduces the generation of NH3,HCN,CH3CN,and HNCO while the catalysis effects of Fe2O3 on the formation of H and H2 play a promoting role in the generation of NH3,HCN,CH3CN,and HNCO.The results would provide an experimental and theoretical basis for subsequent research on the NOx precursor formation mechanisms during pyrolysis or combustion of Fe-containing sludge or sludge with additives containing Fe.