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Theoretical and experimental investigations on the combustion characteristics of three components mixed municipal solid waste.

Liu, Xiaozhou; Asim, Taimoor; Zhu, Guangyu; Mishra, Rakesh

Authors

Xiaozhou Liu

Taimoor Asim

Guangyu Zhu

Rakesh Mishra



Abstract

The combustion characteristics of mixed municipal solid waste (MMSW) play a vital role in dictating the efficiency of the incineration process. At present, few studies have been reported on combustion characteristics of three components MMSW and the establishment of a corresponding comprehensive kinetic model of single component waste. In the present study, based on the law of mass action and Badzioch's relation, the mathematical expressions for describing the thermogravimetric (TG) curves and the differential thermal (DT) curves of single component MMSW are derived. A comprehensive kinetic model for the combustion characteristics of single component MMSW is developed and the appropriateness of the model is confirmed by the experimental results. The calculated TG curves closely agree with the experimental curves; the maximum deviation between the experimental and calculated curves is within 5%. Based on the principle of mixture experiments, the co-combustion characteristics of MMSW composed of food bag, disposable chopsticks and cotton cloth are studied by using thermogravimetric analysis (TGA) and differential thermal analysis (DTA). It has been found that the activation energy of three components MMSW is lower than that of single component MMSW. Finally, based on multiple regression analysis for the design of mixture experiments and the corresponding data, an empirical formula for calculating activation energy of three components MMSW is obtained. The experimental and calculated values match closely; the maximum deviation between them is within 7%. The empirical formula provides a robust way to calculate activation energy of three components MMSW.

Journal Article Type Article
Publication Date May 1, 2020
Journal Fuel
Print ISSN 0016-2361
Electronic ISSN 1873-7153
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 267
Article Number 117183
Institution Citation LIU, X., ASIM, T., ZHU, G. and MISHRA, R. 2020. Theoretical and experimental investigations on the combustion characteristics of three components mixed municipal solid waste. Fuel [online], 267, article ID 117183. Available from: https://doi.org/10.1016/j.fuel.2020.117183
DOI https://doi.org/10.1016/j.fuel.2020.117183
Keywords Mixed municipal solid waste; Solid waste; Combustion characteristics; Waste combustion; Thermogravimetric analysis; Differential thermal analysis; Kinetic model