State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China.
College of Science, China University of Petroleum (East China), Qingdao 266580, China.
Waste Manag. 2018 Oct;80:64-72. doi: 10.1016/j.wasman.2018.09.006. Epub 2018 Sep 6.
Municipal solid waste treatment has been and will continue to be a major issue facing countries worldwide, and gasification has recently gained more attention as an efficient and clean technology. The steam gasification characteristics and kinetics of five different municipal solid waste chars had been investigated by the method of isothermal thermogravimetric analysis. The results showed that the gasification reactivity increased with gasification temperature. Effect of H/C and O/C ratios, ash composition and particle pore structure of chars on gasification reactivity were studied, which illustrated that the H/C and O/C ratios and ash composition had great influence on gasification reactivity and the pore structure cannot explain well in this study. A homogeneous model, unreacted shrinking core model and random pore model were employed to describe the kinetic behavior of different chars, and the kinetic parameters were also obtained. Finally, through the evaluation of the three kinetic models by comparing the experimental data with the fitted results, the random pore model was determined to perform best. This study should, therefore, be of some value to solid waste gasification industrialization.
城市固体废物处理一直是并将继续是全球各国面临的主要问题，而气化作为一种高效、清洁的技术，最近受到了更多的关注。采用等温热重分析方法研究了五种不同城市固体废物炭的蒸汽气化特性和动力学。结果表明，气化反应性随气化温度的升高而增加。研究了炭的 H/C 和 O/C 比、灰分组成和颗粒孔结构对气化反应性的影响，结果表明 H/C 和 O/C 比以及灰分组成对气化反应性有很大影响，而孔结构在本研究中不能很好地解释。采用均相模型、未反应收缩核模型和随机孔模型来描述不同炭的动力学行为，并得到了动力学参数。最后，通过比较实验数据与拟合结果对三个动力学模型进行评估，确定随机孔模型表现最佳。因此，本研究对固体废物气化的工业化具有一定的价值。
