Hydrothermal treatment (HTT) experiments were conducted at 210○C and 230○C with 30, 60 and 90 min residence times. Fourier transform infrared spectroscopy (FT-IR) and 13C solid-state nuclear magnetic resonance (NMR) were employed to elucidate the effect of HTT on the chemical structure of municipal solid waste. FT-IR results clearly demonstrate that decarboxylation and aromatization reactions occurred during HTT. Fewer types of carbon skeleton structures were observed in the 13C solid-state NMR of hydrochars. The aliphaticity yield increased from 74.84% to 91.57% with increasing experiment parameters. In addition, the aromatization reaction was more dramatic in the early stage time, while carbonyl compounds decomposed during the HTT process. Pyrolysis gas chromatography mass spectrometry analysis showed that HTT had positive effects on the simplification of the pyrolytic gas component. In addition, all hydrochars were significantly inhibited to the formation of aromatic compounds with a minor relative peak area of 19.89%. Moreover, hydrochars obtained at a relatively low temperature could achieve a higher yield of hydrocarbons, and hydrocarbons could be partly purified after the HTT process. Overall, the available values of fast pyrolysis products were upgraded by the HTT process.

中文翻译：

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城市生活垃圾水热处理制氢碳的化学结构分析及快速微热解研究

水热处理 (HTT) 实验在 210 ℃和 230 ℃下进行，停留时间分别为 30、60 和 90 分钟。傅里叶变换红外光谱 (FT-IR) 和 13C 固态核磁共振 (NMR) 被用来阐明 HTT 对城市固体废物化学结构的影响。FT-IR 结果清楚地表明在 HTT 过程中发生了脱羧和芳构化反应。在碳氢化合物的 13C 固态 NMR 中观察到的碳骨架结构类型较少。随着实验参数的增加，脂肪产率从74.84%增加到91.57%。此外，芳构化反应在早期阶段更为剧烈，而羰基化合物在 HTT 过程中分解。热解气相色谱质谱分析表明HTT对热解气体组分的简化具有积极作用。此外，所有水碳都显着抑制了芳香族化合物的形成，较小的相对峰面积为 19.89%。此外，在相对较低的温度下获得的烃可以实现更高的烃收率，并且在HTT过程后可以部分纯化烃。总体而言，HTT 工艺提升了快速热解产品的可用价值。在HTT过程之后，烃可以被部分纯化。总体而言，HTT 工艺提升了快速热解产品的可用价值。在HTT过程之后，烃可以被部分纯化。总体而言，HTT 工艺提升了快速热解产品的可用价值。