THE INFLUENCE OF THE PROTECTIVE PYROLYSIS ATMOSPHERE OF VEGETABLE WASTE ON BIOCARBON CONSTRUCTION
Journal Title: Journal of Machine Construction and Maintenance - Year 2018, Vol 111, Issue 4
Abstract
The aim of the study was to investigate the influence of the type of the protective gas used during the pyrolysis of selected plant waste on the chemical structure and microstructure of produced biocarbons. The following types of vegetable waste were selected for tests: wheat straw, maize waste, flax straw, and cherries stones. Carbon dioxide or nitrogen was used as a protective gas during the pyrolysis. The pyrolysis was carried out of cascade conditions to increase of the temperature to a maximum of 500°C. The produced biocarbons were analysed by Raman spectroscopy, FTIR spectrophotometry, and the SEM/EDS technique. It was found that protective gas has a clear influence on the microstructure and chemical structure of the pyrolysis product only in the case of biocarbons obtained from maize waste. It was confirmed that the biocarbon obtained in an atmosphere of carbon dioxide is characterized by a higher proportion of oxygen compared to the product produced in a nitrogen atmosphere. This is due to the presence of oxygen-organic functional groups. In addition, it has been spectrally demonstrated that the biocarbon produced from maize waste in a nitrogen atmosphere is characterized by a high microstructural ordering. However, in the biocarbon obtained in the atmosphere of carbon dioxide are also amorphous areas.
Authors and Affiliations
Jarosław MOLENDA
Keywords
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