Banca de QUALIFICAÇÃO: TASSIO LESSA DO NASCIMENTO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : TASSIO LESSA DO NASCIMENTO
DATE: 28/09/2022
TIME: 08:00
LOCAL: Online (link: meet.google.com/pmr-eesr-upg)
TITLE:

DEVELOPMENT OF BIFUNCTIONAL ADDITIVES DERIVED FROM CASHEW NUT LIQUID FOR APPLICATION AS ADDITIVES FOR DIESEL/BIODIESEL BLENDS

KEY WORDS:

Aditives; LCC; antioxidante; lubricity.

PAGES: 124
BIG AREA: Ciências Biológicas
AREA: Bioquímica
SUMMARY:

In recent times concerns have arisen in relation to environmental pollution and  global warming, strengthening the search for alternative solutions to the consumption of  oil and its derivatives. Thus, biodiesel was introduced in the Brazilian energy matrix  through the National Program for Biodiesel Production and Use (PNPB), whose objective  was to implement the production and use of biodiesel in a sustainable way, focusing on  social inclusion and regional development, also aiming to reduce the dependence on  imported fossil derivatives, diesel. Although diesel oil derived from petroleum has a high  oxidative stability when compared to biodiesel, in blends between these two fuels the  instability to oxidation of biodiesel predominates, which becomes an aggravating  problem when a prolonged storage period occurs. This phenomenon of wear and/or  corrosion can be common to most mechanical elements and devices, which can, in most  applications, be determining factors in the quantification of the useful life of equipment.  To avoid these situations, different procedures have been applied to minimize the effects  of fuel use. Thus, this project aimed to produce antioxidant and lubricity additives from  Cashew Nut Liquids, a by-product of the cashew nut processing industry. Eight additives  were synthesized, 3-pentadecylphenol (CD), 2-tert-butyl-5-pentadecylphenol (CDA), 2- nitro-5-pentadecylphenol (CDN), diethyl-3-pentadecylphenyl phosphate (CDF), 3- pentadecylphenyl diphenyl (CDIF), tri (3-pentadecylphenyl) phosphate (3CDF), 2-tert butyl-5-pentadecylphenyl diethyl phosphate (CADF) and 2-tert-butyl-5-pentadecylphenyl  diphenyl phosphate (CADIF). All of these products were characterized by a suite of  experimental, 1H NMR, 13C NMR, infrared and GC/MS techniques. The antioxidant  activity of these additives was evaluated using the DPPH and Rancimat methods. In both  tests the concentration of each additive was 2000 mg/kg. For evaluation by Rancimat,  each additive was inserted in a soy biodiesel synthesized in a laboratory and characterized  according to ANP Resolution No. 45 OF 08/25/2014. All compounds stabilized the  DDPH radical, with compounds CDA, CD and 3CF showing the highest percentages for  free radical reduction, 81.1, 46.5, 43% respectively. In the evaluation performed by the  Rancimat technique, all compounds increased the induction time of the analyzed  biodiesels, and the largest increases were the compounds 3CDF (32.8%), CDA (31%),  and CADIF (31%). The next step of this work will be to evaluate the lubricity capacity of  the additives through the Four Ball technique, in the diesel/biodiesel blend. With the completion of this project we will propose eco-efficient, eco-compatible products and  consequently adding biotechnological values for the fuel industries.

COMMITTEE MEMBERS:
Presidente - ***.411.623-** - DEBORAH DE MELO MAGALHÃES PADILHA - UnP
Externo ao Programa - 1308273 - EDUARDO LINS DE BARROS NETO - UFRNExterno à Instituição - FRANCISCO EDUARDO ARRUDA RODRIGUES - IFCE