Banca de QUALIFICAÇÃO: ISABELLA SOARES FERNANDES GOECKING

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ISABELLA SOARES FERNANDES GOECKING
DATE: 20/12/2022
TIME: 10:00
LOCAL: Auditório Campus Gameleira
TITLE:

Estudo de caso das emissões atmosféricas na produção de carvão vegetal em fornos de alvenaria com a recuperação de subprodutos

KEY WORDS:

Charcoal, atmospheric emissions, tar recovery in carbonization.

PAGES: 83
BIG AREA: Engenharias
AREA: Engenharia Ambiental
SUMMARY:

Brazil is one of the largest producers of charcoal in the world, but the implementation of units with high productivity wood carbonization ovens has limitations and many producers continue to use masonry ovens, which have low gravimetric yields and high atmospheric emissions. Carbonization reaction by-products have high economic potential when directed to other chemical industries and can be recovered by condensation. The objective of this work was to evaluate the concentrations of particulate matter and volatile organic compounds during a carbonization cycle in a masonry oven during the recovery of pyroligneous liqueur. The object of study was the oven-reclaimer system located in a Charcoal Producing Unit (UPC) where charcoal is obtained as the main product and pyroligneous liqueur (oil tar and acid pyroligneous) as a secondary product. The samplings were carried out at two different points, at the entrance and exit of the retriever. The samples were collected according to the procedures of the Environmental Protection Agency (EPA) and the Brazilian Association of Technical Standards (ABNT) and the gas flow was submitted to control subsystems and measurements. Humidity was determined by the approximate and saturated flow methods in the cold box of the Isokinetic Collector of Atmospheric Pollutants (CIPA). The analyses of Volatile Organic Compounds (COVs), gas composition (O2, CO2, O2, N2) and nitrogen oxides (NOx) were performed by online analyzers at the output of the CIPA gasometer. In addition, in CIPA it was possible to perform the measurements of gas flow and velocity. The particulate matter collected in the subsystem was taken to the laboratory and the mass content obtained by gravimetric method. The results showed the relevance of the recovery of carbonization by-products as an alternative for the reduction of atmospheric emissions and the opportunity to add value to the production process of charcoal. The MP and COVs levels showed a significant reduction in the carbonization phase of the production process, which has the release of more intense polluting gases, in addition it was observed that the concentrations are influenced by the temperature of the gas and the oven, as well as by the carbonization phase that the wood is in, and it is necessary to improve the process involving temperature control and the use of more efficient containment equipment during the recovery process of the smoke.

COMMITTEE MEMBERS:
Presidente - ADRIANA AKEMI OKUMA
Externa à Instituição - ANA CLARA CAXITO