College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
Bioresour Technol. 2018 Jan;247:182-189. doi: 10.1016/j.biortech.2017.09.076. Epub 2017 Sep 14.
The influence of temperature (180-260°C) on the fate of nitrogen during hydrothermal carbonization (HTC) of food waste (FW) was assessed. The distribution and evolution of nitrogen in aqueous products and bio-oil, as well as hydrochar, were conducted. Results suggested that elevated temperature enhanced the deamination and the highest ammonium concentration (929.75mg/L) was acquired at 260°C. At temperatures above 220°C, the total N in the hydrochar became stable, whereas the mass percentage of N increased. Amines and heterocyclic-N compounds from protein cracking and Maillard reactions were identified as the main nitrogen-containing compounds in the bio-oil. As to the hydrochar, increasing temperature resulted in condensed nitrogen-containing aromatic heterocycles (e.g. pyridine-N and quaternary-N). In particular, remarkable Maillard reactions at 180°C and the highest temperature at 260°C enhanced nitrogen incorporation (i.e. quaternary-N) into hydrochar.
研究了水热碳化（HTC）过程中温度（180-260°C）对食物垃圾（FW）中氮命运的影响。对水热碳化过程中氮在水相产物、生物油和水热炭中的分布和演变进行了研究。结果表明，高温促进了脱氨作用，在 260°C 时获得了最高的氨浓度（929.75mg/L）。在 220°C 以上的温度下，水热炭中的总氮变得稳定，而氮的质量百分比增加。从蛋白质裂解和美拉德反应中鉴定出胺和杂环-N 化合物是生物油中主要的含氮化合物。对于水热炭，温度的升高导致含氮芳香杂环（如吡啶-N 和季氮）的缩合。特别是，在 180°C 下发生了显著的美拉德反应，在 260°C 下达到了最高温度，这增强了氮（即季氮）在水热炭中的掺入。
