INFLUENCE OF Eucalyptus WOOD ADDITION TO URBAN WOOD WASTE DURING COMBUSTION

Abstract

This research analyzed the effect of the addition of E. grandis x E. urophylla wood to the wood waste of urban origin (WWU) as a strategy for energy generation. The WWU was collected in transshipment and from a sorting company of civil construction waste in the city of Piracicaba, SP. The wood of eucalyptus was obtained from a 7-year old plantation. Five treatments with proportions (%) of WWU and eucalyptus wood were analyzed: T1 = 100/0, T2 = 75/25, T3 = 50/50, T4 = 25/75 and T5 = 0/100. The treatments had the physical, chemical, immediate characteristics, mineral contaminants rate, and combustion test (ICOM) analyzed. The data were analyzed through the study of variance, correlations, and multivariate hierarchical clusters analysis (HCA). The higher content of extractives, holocellulose, volatile materials, low ash content values, rate of mineral contaminants and high performance for combustion test were observed only for the treatment having exclusively eucalyptus wood (T5). However, the addition of eucalyptus wood in the WWU allowed for the increase of the ICOM of these materials. In this way, the T3 treatment presents as the most recommended for energetic use.

Understanding the Impacts of Pyrolysis Temperature on the Energy Performance of Eucalyptus spp. Charcoal

“…Therefore, it is interesting that strategies are devised to reduce the ash content in waste reused for energy generation. As Eucalyptus has a low ash content, eucalypt wood blends can be the solution to reduce ash and improve the energy properties of other biomasses used as fuel [25].…”

“…In addition, the energy properties determined in this study depend on the combustion efficiency of the material. The Combustion Index (ICOM) evaluates the amount of energy released in relation to the amount of mass consumed during the combustion process [25]. That is, the larger the ICOM, the greater the heat generation for the same amount of mass [25].…”

“…The Combustion Index (ICOM) evaluates the amount of energy released in relation to the amount of mass consumed during the combustion process [25]. That is, the larger the ICOM, the greater the heat generation for the same amount of mass [25]. The final carbonization temperature influenced the ICOM of the studied materials, providing an increase of about 42.3% in the ICOM for the charcoal produced at a temperature of 450 • C. Investigating the influence of carbonization temperature on the energy quality of charcoal is essential to increasing knowledge about the thermal behavior of biomass when exposed to heat.…”

A Novel Approach to Charcoal Fine Waste: Sustainable Use as Filling of Polymeric Matrices

“…Pyrolysis occurs in controlled amounts of oxygen at temperatures above 300 • C, and factors such as permanence in reaction zones, final temperature, pressure, and heating rate influence it [1,4]. Thus, we need to investigate the relevant parameters originating charcoal, especially the absolute temperature, since it affects all crucial characteristics for producing carbon biocomposite [5,6].…”

Energy potential of wood waste from a tropical urban forest

“…Replacing a share of fossil fuels, the use of urban forestry wood waste as a source of bioenergy could reduce greenhouse gas emissions compared to open air burning and mitigate environmental impacts of carbon dioxide in climate change (Timilsina et al, 2014;Wolf et al, 2016) and that can present 80% reduction in the carbon footprint (Araújo et al, 2018). Wood waste of tropical urban forests has great potential for the production of higher added value products and bioenergy generation is one of the most compatible alternatives due to constant supply of biomass since maintenance of urban forestry is a routine activity and conversion facility at low costs (Dias Júnior et al, 2017;Joshi et al, 2015;Timilsina et al, 2014).…”