文献类型：期刊文献

中文题名：城市污泥水热液化过程及产物特征

英文题名：Hydrothermal Liquefaction Process and Liquefied Products Characteristics of Municipal Sewage Sludge

作者：张逸秋[1];吴诗勇[1];吴幼青[1];黄胜[1];高晋生[1]

机构：[1]华东理工大学资源与环境工程学院,煤气化教育部重点实验室,上海200237

年份：2020

卷号：46

期号：2

起止页码：234

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金(21476079);上海市科委项目(17DZ1202604)。

语种：中文

中文关键词：城市污泥;水热液化;生物粗油;水相有机质

外文关键词：municipal sewage sludge;hydrothermal liquefaction;bio-crude;water-soluble organics

摘要：以城市污泥为原料,考察反应温度对城市污泥水热液化过程及液化产物特征的影响。结果表明:在370℃时生物粗油产率和沥青烯产率分别达到最大值26.82%和27.73%,水回收率及体积减量度也分别达到最大值94.81%和80.16%,说明城市污泥经水热液化处理后能取得良好的减量化效果;生物粗油主要含有脂肪酸类、胺类和脂肪烃类,且脂肪酸类碳链长度主要集中在C16~C18;水相有机质则主要由羧酸类、酯类、胺类和酚类组成;液体燃料热值回收率在53.23%~98.20%之间,说明水热液化处理在城市污泥的资源化利用方面具有良好的前景。
The effects of reaction temperature on hydrothermal liquefaction(HTL)process of municipal sewage sludge(MSS)and on liquefied products characteristics were investigated.The results showed that the bio-crude yield and asphaltene yield reached the highest level at 370℃,which were 26.82%and 27.73%,respectively.The water recovery ratio and volume reduction ratio were also increased to the maximum value of 94.81%and 80.16%,respectively,indicating that improved effects on volume reduction of MSS were obtained after HTL process.The mass concentration of water-soluble organics dropped to 29.47 g/L,which demonstrated that higher reaction temperature would promote the decomposition of these water-soluble organics.The bio-crude was mainly composed of aliphatic acids,amines and aliphatic hydrocarbons,and the carbon chain length of aliphatic acids was located in between 16 and 18,which indicated that the properties of bio-crude were similar to those of diesel oil.The water-soluble organics were mainly composed of carboxylic acids,esters,amides and phenols while the existence of carboxylic acids would have detrimental influences on the growth of plants,the availability of soil nutrient and the biodiversity of environment.The gaseous products were mainly consisted of CO2 which could be explained by the decarboxylation taking place on the surface of MSS particles.The ash content of residual solids reached the highest level(79.72%)at 370℃,which showed that a better extraction rate of organic matters in residual solids could be obtained by HTL process.During the HTL process,the energy recovery ratio of liquid bio-fuels was between 53.23%and 98.20% at 270℃ to 370℃,indicating that more than half heating value of the MSS could be recovered to be liquid bio-fuels upon a HTL treatment.