文献类型：期刊文献

中文题名：餐厨垃圾水热炭化:理化特性、碱(土)金属迁移及气化反应性研究

英文题名：Hydrothermal carbonization of food waste:physicochemical properties,alkali and alkaline earth metals(AAEM)migration,and gasification reactivity

作者：巫钰樊[1];杨明明[1];王伟成[1];郭松灵[1];丁路[1]

机构：[1]华东理工大学洁净煤技术研究所,上海200237

年份：2026

卷号：49

期号：2

起止页码：92

中文期刊名：煤炭转化

外文期刊名：Coal Conversion

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划项目(2022YFC3902404)。

语种：中文

中文关键词：餐厨垃圾;水热炭化;理化特性;碱(土)金属;气化反应性

外文关键词：food waste;hydrothermal carbonization(HTC);physicochemical properties;alkali and alkaline earth metals(AAEMs);gasification reactivity

摘要：针对传统工艺中餐厨垃圾的高含水率与能效低下的问题,通过水热炭化耦合非等温气化工艺对餐厨垃圾进行改性提质和高效能源化利用,在180℃~240℃温度范围、停留时间为60min的制备条件下制取餐厨垃圾水热炭,研究了工艺参数中温度对其理化特性的影响、碱及碱土金属的赋存形态及其气化反应性表现。结果表明:水热温度由180℃升高至240℃时,餐厨垃圾碳质量分数由41.15%增加到68.09%,热值由15.63 MJ/kg增加到28.84 MJ/kg,其能量密度大幅提升;水热炭化过程以脱水和脱羧反应为主,显著降低了n(H)/n(C)和n(O)/n(C),提高了水热炭的煤化程度,较高温度下芳构化反应有所增强;水热炭表面形成大量微球颗粒与交联结构,孔隙结构得到发展,为气化反应提供了更多反应位点;且碱及碱土金属脱除率随温度提高而增加,其中活性钾的脱除率高达89.91%,有效减少了气化过程中碱(土)金属引起的结渣、积灰等问题;水热炭化预处理改善了水热炭的着火温度与脱挥发分特性,增强了其后续非等温气化过程中的热稳定性。
To address the high moisture content and low energy efficiency of traditional food waste processing,a hydrothermal carbonization(HTC)coupled with a non-isothermal gasification process was employed to modify,upgrade,and efficiently utilize food waste.Under preparation conditions of a 180℃?240℃temperature range and a 60 min residence time,hydrochar(hydrothermal carbon)from food waste was produced.The study investigated the effects of temperature on the physicochemical properties of the hydrochar,the speciation of alkali and alkaline earth metals(AAEMs),and their gasification reactivity.The results show that as the hydrothermal temperature increases from 180℃to 240℃,the carbon content of the food waste rises from 41.15%to 68.09%,and its calorific value increases from 15.63 MJ/kg to 28.84 MJ/kg,significantly improving the energy density.The hydrothermal carbonization process primarily involves dehydration and decarboxylation reactions,which markedly reduce n(H)/n(C)and n(O)/n(C),enhance the coalification degree of the hydrothermal carbon,and strengthen aromatization reactions at higher temperatures.The surface of the hydrothermal carbon forms abundant microspherical particles and cross-linked structures,developing a pore architecture that provides more reaction sites for gasification.Additionally,the removal ratios of AAEMs increase with temperature,with the removal ratio of active potassium reaching as high as 89.91%,effectively mitigating slagging and ash deposition issues caused by these metals during gasification.The hydrothermal carbonization pretreatment improves the ignition temperature and volatilization characteristics of the hydrochar,enhancing its thermal stability in subsequent non-isothermal gasification processes.