Banca de QUALIFICAÇÃO: LAÍZA ALVES FONSECA BARBOSA
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.STUDENT : LAÍZA ALVES FONSECA BARBOSA
DATE: 01/09/2023
TIME: 14:00
LOCAL: Campus Gameleira
TITLE:
CONCENTRATION OF PIROLENE EXTRACT FROM THE CARBONIZATION OF EUCALYPTUS sp WOOD BY APPLICATION OF MEMBRANE SEPARATION PROCESSES
KEY WORDS:
Pyroligneous extract. Membranes. Concentration. Sustainability.
PAGES: 80
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:
Currently, environmental problems have been highlighted worldwide. One of the main environmental impacts is caused by the accumulation of polluting gases in the atmosphere, increasing the earth's temperature, aggravating the greenhouse effect and causing climate change. In addition, the demand for energy and natural resources, such as water, has increased due to the development of urban centers and population growth. Given this scenario, there is a notable need for the rational use of resources, as well as strategies in production processes that prioritize sustainable changes. There are already industrial sectors that exercise sustainable practices in their processes. As an example, the adoption of charcoal, from renewable sources, replacing mineral coal. Brazil has become the main producer of charcoal and the state of Minas Gerais represents 89% of production. Carbonization is a thermochemical process, in which wood decomposition occurs, generating charcoal, condensable gases (pyroligneous liquor) and non-condensable gases (CO, CO2, CH4). Pyroligneous liquor is separated by distillation into plant tar and pyroligneous extract. Pyroligneous extract, also known as pyroligneous acid or wood vinegar, has several applications, mainly in agricultural activities, as a fertilizer and/or herbicide. This is due to its chemical composition, containing organic compounds responsible for the fertilizing and/or herbicidal action. The extract consists of about 93% water and 7% organic compounds such as carboxylic acids, phenolic compounds and ketones. Aiming at the circular economy and sustainability, the present work aims to carry out the concentration of pyroligneous extract from the application of membrane separation processes (MSP). These processes were selected due to their characteristics in terms of energy saving and because it is characterized as a clean and sustainable technology. Polymeric ultrafiltration membranes of Polyvinylidene Fluoride (PVDF) were used in the conformation of hollow fibers packed in permeation modules in the shell-tube configuration. The permeate, concentrate and feed fractions obtained were analyzed in terms of Gas Chromatography coupled to Mass Spectrometry (GC-MS), pH, turbidity and solids series to evaluate the efficiency of ultrafiltration in the removal of solid materials. Subsequently, NF90 nanofiltration membranes and BW30 reverse osmosis membranes, both in the frame-plate conformation, were used to evaluate the behavior of the membranes in the concentration of the pyroligneous extract. The permeate and concentrate fractions obtained were analyzed in terms of Gas Chromatography coupled to Mass Spectrometry, turbidity and Chemical Oxygen Demand (COD) to evaluate the efficiency of the membranes in the concentration of the extract. The results obtained so far indicate that the methodology is adequate and has the potential to achieve the final objective of concentrating the extract, being able to recover and reuse the water in the industrial process itself. The commercialization of the concentrated pyroligneous extract will reduce transportation and packaging costs, which contributes to the mitigation of greenhouse gases (GHG) emitted by transportation and packaging waste, in addition to contributing to the mitigation of various air pollutants, as well as reducing energy consumption and the demand for other resources.
COMMITTEE MEMBERS:
Presidente - CLEVERSON FERNANDO GARCIA
Externa à Instituição - HELEN CONCEIÇÃO FERRAZ - UFRJ
Externa à Instituição - VÂNYA MÁRCIA DUARTE PASA - UFMG