Study on the nitrogen transformation during the primary pyrolysis of sewage sludge by Py-GC/MS and Py-FTIR
Study on the nitrogen transformation during the primary pyrolysis of sewage sludge by Py-GC/MS and Py-FTIR
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DOI：
10.1016/j.ijhydene.2017.04.144
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发表时间：
2017-07
影响因子：
7.2
通讯作者：
P. Zhou;Sijiang Xiong;Yuxuan Zhang;Huipeng Jiang;Y. Chi;Lei Li
中科院分区：
文献类型：
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作者：
P. Zhou;Sijiang Xiong;Yuxuan Zhang;Huipeng Jiang;Y. Chi;Lei Li
利用Pyrolyzer-气相色谱/质谱（Py-GC/MS）和Pyrolyzer-傅里叶变换红外光谱（Py-FTIR）研究了污水污泥初级热解过程中中间体和NOx前体的氮转化。提出了污水污泥热解过程中氮转化的三阶段过程。不稳定蛋白质和无机铵盐的分解主要发生在第一阶段（<300°C），产生少量的NH3。在第二阶段（300-600℃），大分子蛋白质首先裂解成小分子胺化合物，然后进行脱氨基过程，导致NH3的大量释放。第三阶段（600~900℃），胺类化合物转化为腈，生成大量HCN，而NH3的形成相应减慢。
The nitrogen transformation with attention to the intermediates and NOxprecursors 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 NH3slowed down accordingly.