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Physiochemical properties and pyrolysis behavior evaluations of hydrochar from co-hydrothermal treatment of rice straw and sewage sludge
Biomass & Bioenergy ( IF 6 ) Pub Date : 2020-07-18 , DOI: 10.1016/j.biombioe.2020.105664
Shuping Zhang , Meng Pi , Yinhai Su , Dan Xu , Yuanquan Xiong , Huiyan Zhang

Co-hydrothermal treatment is an effective approach to recovery the energy and fuels from organic matter in rice straw (RS) and sewage sludge (SS). In this study, the basic fuel characteristics, ash composition, the subsequent pyrolysis behavior and relevant reaction kinetic parameters of obtained hydrochar were evaluated. The results indicated that co-hydrothermal treatment improved the fuel characteristics of hydrochar with high HHV and low N and S contents. FTIR analysis indicated that the presence of the synergy between RS and SS during co-hydrothermal treatment that the organic acids from hydrolysis of hemicellulose promoted the degradation of N-containing functional groups. In addition, the ash composition analyses showed that the obtained hydrochar had high ash fusion temperature as a result of the high removal efficiency of alkali metals during co-hydrothermal treatment. Moreover, co-hydrothermal treatment can promote the pyrolysis reaction by reducing the activation energy with the synthetic effect of RS and SS during co-hydrothermal treatment process. In summary, co-hydrothermal treatment improved the physiochemical properties and promoted the pyrolysis behavior of obtained hydrochar from RS and SS.



中文翻译:

稻草和污水污泥共水热处理的碳氢化合物的理化性质和热解行为评估

共水热处理是从稻草(RS)和污水污泥(SS)中的有机物中回收能量和燃料的有效方法。在这项研究中,评估了所获得的烃的基本燃料特性,灰分组成,随后的热解行为以及相关的反应动力学参数。结果表明,共水热处理改善了高HHV和低N,S含量的水煤油的燃料特性。FTIR分析表明,在共水热处理过程中,RS和SS之间存在协同作用,即半纤维素水解产生的有机酸促进了含氮官能团的降解。此外,灰分组成分析表明,由于在共水热处理过程中碱金属的去除效率高,所得到的烃具有较高的灰熔融温度。此外,在共水热处理过程中,共水热处理可通过降低活化能并通过RS和SS的合成作用来促进热解反应。总之,共水热处理改善了从RS和SS获得的烃的理化性质并促进了其热解行为。

更新日期:2020-07-18
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