MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
Bioresour Technol. 2017 Sep;239:302-310. doi: 10.1016/j.biortech.2017.04.067. Epub 2017 Apr 21.
Gaining the valuable fuels from sewage sludge is a promising method. In this work, the fast pyrolysis characteristics of sewage sludge (SS), wheat straw (WS) and their mixtures in different proportions were carried out in a drop-tube reactor. The combustion reactivity of the residual char obtained was investigated in a thermogravimetric analyzer (TGA). Results indicate that SS and WS at different pyrolysis temperatures yielded different characteristic gas compositions and product distributions. The co-pyrolysis of SS with WS showed that there existed a synergistic effect in terms of higher gas and bio-oil yields and lower char yield, especially at the WS adding percentage of 80wt%. The addition of WS to SS increased the carbon content in the SS char and improved char porous structures, resulting in an improvement in the combustion reactivity of the SS char. The research results can be used to promote co-utilization of sewage sludge and biomass.
从污水污泥中获取有价值的燃料是一种很有前途的方法。在这项工作中，采用落管式反应器研究了污水污泥（SS）、小麦秸秆（WS）及其不同比例混合物的快速热解特性。在热重分析仪（TGA）中研究了所得残余炭的燃烧反应性。结果表明，SS 和 WS 在不同的热解温度下产生了不同的特征气体组成和产物分布。SS 与 WS 的共热解表明，在气体和生物油产率较高、炭产率较低方面存在协同效应，特别是在 WS 添加量为 80wt%时。WS 的添加增加了 SS 炭中的碳含量，改善了 SS 炭的多孔结构，从而提高了 SS 炭的燃烧反应性。研究结果可用于促进污水污泥和生物质的联合利用。
