Thermochemical liquefaction characteristics of sewage sludge in different organic solvents
Thermochemical liquefaction characteristics of sewage sludge in different organic solvents
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污水污泥在不同有机溶剂中的热化学液化特性
DOI：
10.1016/j.jaap.2014.06.015
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发表时间：
2014-09-01
影响因子：
6
通讯作者：
Zeng, Guang-ming
中科院分区：
文献类型：
--
作者：
Huang, Hua-jun;Yuan, Xing-zhong;Zeng, Guang-ming
对比研究了污泥在不同有机溶剂(甲醇、乙醇和丙酮)中的热化学液化特性。实验是在固液比固定的高压灭菌器中进行的，温度从260摄氏度到380摄氏度不等。上述溶剂的转化率为：甲醇>；乙醇>；丙酮。以丙酮为液化溶剂时，生物油的产率较高。液化溶剂的种类对生物油产品的化学性质也有很大影响。甲醇和乙醇主要生成酯类化合物，丙酮主要生成酮类和含氮化合物。同时，一些酚类化合物、醇类和极少量的碳氢化合物也合格。使用甲醇和乙醇生产的生物油的热值分别高达37.69MJ/kg和38.42MJ/kg，远远高于使用丙酮生产的生物油的热值(26.74MJ/kg)。热重分析(TGA)结果表明，生物油中含有相当多的轻质组分。低沸点(BP<；350℃)化合物占上述三种生物油重量的78.13%~85.76%。总体而言，从效率和可再生性的角度来看，乙醇似乎更适合于污泥液化。(C)2014爱思唯尔B.V.保留所有权利。
Thermochemical liquefaction characteristics of sewage sludge in different organic solvents (methanol, ethanol and acetone) were comparatively investigated. Experiments were carried out in an autoclave at different temperatures ranging from 260 degrees C to 380 degrees C with a fixed solid/liquid ratio. The efficiency of above solvents in terms of conversion rate was found to be: methanol > ethanol > acetone. However, higher bio-oil yield was obtained with acetone as liquefaction solvent. The chemical properties of the bio-oil products were also significantly affected by the type of liquefaction solvent. Methanol and ethanol yielded mainly ester compounds, while acetone favored the formation of ketone and N-containing compounds. Meanwhile, some phenolic compounds, alcohols and very few hydrocarbons were also qualified. The calorific values of the bio-oils produced using methanol and ethanol were as high as 37.69 MJ/kg and 38.42 MJ/kg, respectively, much higher than that using acetone (26.74 MJ/kg). The results of thermogravimetric analysis (TGA) showed that the bio-oils contained a considerable amount of light components. And the content of low-boiling-point (bp < 350 degrees C) compounds ranged from 78.13% to 85.76% of the weight for above three bio-oils. On the whole, ethanol seems to be more suitable for sewage sludge liquefaction from the viewpoint of efficiency and renewability. (C) 2014 Elsevier B.V. All rights reserved.