Русская версия English version

Experimental study of solid waste oxidative pyrolysis

R.N. Gabitov, O.B. Kolibaba, K.V. Aksenchik, V.A. Artemieva

Vestnik IGEU, 2017 issue 3, pp. 14—19

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Abstract in English: 

Background:  One of the main directions of Russia's energy policy is the use of alternativel renewable energy sources. Such sources include solid organic wastes, including municipal waste (MSW). There ar now methods of economically profitable, environmentally friendly and technically available processing of solid waste without its preliminary sorting by using thermal methods, including pyrolysis. The works of scientists such as P. Basu, L.Ya. Shubov, G.V. Kuznetsov, A.G. Kopachev and others are devoted to the studies of pyrolysis. However, oxidative pyrolysis, which represents the most universal type independent of the fractional composition and phase state of the waste, its moisture and ash content, has not been studied well yet. That is why an urgent problem is to conduct an experimental study of oxidative pyrolysis of MSW mixture and its individual components.

Materials and methods: MSW oxidative pyrolysis was studied by the following methods of thermal analysis: thermogravimetric analysis (TG analysis), which consisted in continuous recording of the test sample mass change at the changes of its temperature; differential scanning calorimetry (DSC), which consisted in continuous registering of the thermal effects that accompanied the phase and chemical transformations of the sample during its heating; mass spectrometry of gaseous mixtures (MS – analysis).

Results: We have done a thermal analysis of the average morphological composition of the MSW mixture and its individual components in the process of oxidative pyrolysis with an oxygen content of 1 % and 10 % in the atmosphere. As a result of the experiments, we determined pyrolysis temperature ranges and the rate of solid waste sample mass decrease in the processes of drying and oxidative pyrolysis, heat effects accompanying these processes, and the composition and volumes of gases obtained from the oxidative pyrolysis of MSW and its components in the environment with the oxygen content of 1 % and 10 %.

Conclusions: It has been found that in the presence of oxygen (1 %) in the atmosphere, oxidative pyrolysis is accompanied by a weaker thermal effect than in the atmosphere with 10 % oxygen content, but formation of a more calorific pyrolysis gas. The results of experimental studies of oxidative pyrolysis can be used to determine the design and operating parameters of thermal reactors for MSW processing.

Key words: municipal solid waste, thermal pyrolysis, simultaneous thermal analyzer, mass spectrometry, thermogravimetric analysis, differential scanning calorimetry.

References in English: 
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Ключевые слова на русском языке: 
твердые бытовые отходы, термический пиролиз, синхронный термоанализатор, масс-спектрометрия, термогравиметрический анализ, дифференциально-сканирующая калориметрия
Ключевые слова на английском языке: 
municipal solid waste, thermal pyrolysis, simultaneous thermal analyzer, mass spectrometry, thermogravimetric analysis, differential scanning calorimetry
The DOI index: 
10.17588/2072-2672.2017.3.014-019
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