Abstract
In many places, charcoal production, using Australian Blackwood, is still a rudimentary process, generating huge environmental impact, due to the release of pyrolysis smoke into the atmosphere. Both the society and governmental agencies is pushing the factories to condense the smoke, generating byproduct known as pyroligneous liquor. Although it's largely used for agricultural purpose, as a fertilizer and phytosanitizer, its chemical composition presents hydrogen and oxygen rich compounds, making it a potential electrolyte in the surface treatment industry, especially for anodization. Organic alternatives are being used to replace these electrolytes to make the anodizing process cleaner. Then, for the first time, Australian Blackwood pyroligneous liquor was used as an anodizing electrolyte for titanium TICP-G2, to obtain oxides for protection and coloring of the metal. For such, suitable parameters to execute the process were determined (dilution, current density, temperature, agitation, pH, conductivity) and an analysis of the transient potential over time was made. The anodized surfaces were characterized using top view Scan Electronic Microscopy (SEM) and Grazing Incidence X-ray Diffraction (GIXRD). Based on the results presented, it can be concluded that the best parameters to anodize the titanium were obtained with 50% pyroligneous liquor diluted in water, obtaining colored surfaces and promoting the formation of oxide crystallites clusters mainly in longer process times (3600s). Keywords: Pyroligneous liquor, Titanium, Anodizing.
Highlights
IntroductionIn order to replace the current energetic matrix based on fossil fuels, pyrolysis, which is a controlled thermal degradation of biomass rich in cellulosic material, stands out as an alternative for obtaining energy
Environmental problems increase the interest sources in renewable energies
Based on the results presented, it can be concluded that the best parameters to anodize the titanium were obtained with 50% pyroligneous liquor diluted in water, obtaining colored surfaces and promoting the formation of oxide crystallites clusters mainly in longer process times (3600s)
Summary
In order to replace the current energetic matrix based on fossil fuels, pyrolysis, which is a controlled thermal degradation of biomass rich in cellulosic material, stands out as an alternative for obtaining energy. Charcoal production became a forest cultivation byproduct, mainly based on black wattle. In this region, the city of Brochier, for example, has much of its area devoted to the cultivation of this species for the production of charcoal [2], thanks to its rugged topography. It is estimated that there are about 30,000 small coal producers who are established in the state of Rio Grande do Sul, using mainly black wattle as raw material, and eucalyptus, pine and cedar
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