Key Laboratory of Renewable Energy, CAS, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
Key Laboratory of Renewable Energy, CAS, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China.
Bioresour Technol. 2018 Nov;267:17-29. doi: 10.1016/j.biortech.2018.07.002. Epub 2018 Jul 3.
The aim of this work was to study the correlation between dynamic mechanisms of carbon structure associated with their upgrading effects with the help of XPS, C NMR and 2D-PCIS methods. Results showed the fuel qualifies of biowastes were improved and became comparable to lignite or even bitumite after HTC. The carbon chemical bonds of -C-H and -C-O in biowaste components (mainly protein and polysaccharide) were thermally cracked and enriched in liquid phase in the form of soluble intermediates, which subsequently generated coal-like structures via cyclization as well as polymerization at higher temperatures. The further investigation on thermogravimetric analysis found that the conversion of "-C-H/C-O to aromatic -C-C/CC" was beneficial for stabilizing their combustion behavior by integrating two stages of biowastes (devolatilization stage and combustion stage) into one stage of hydrochars (combustion stage).
本工作旨在借助 XPS、C NMR 和 2D-PCIS 方法研究与升级效果相关的碳结构动态机制之间的相关性。结果表明，经过 HTC 后，生物废物的燃料质量得到提高，可与褐煤甚至烟煤相媲美。生物废物成分（主要是蛋白质和多糖）中的 -C-H 和 -C-O 碳化学键在热解作用下断裂，并以可溶性中间产物的形式在液相中富集，随后在更高温度下通过环化以及聚合生成类煤结构。对热重分析的进一步研究发现，“-C-H/C-O 向芳构化 -C-C/CC 的转化有利于通过将生物废物的两个阶段（挥发阶段和燃烧阶段）整合为一个阶段（燃烧阶段）来稳定其燃烧行为”。
