Banca de QUALIFICAÇÃO: LEONARDO GOMES DE MEDEIROS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LEONARDO GOMES DE MEDEIROS
DATE: 07/04/2025
TIME: 14:30
LOCAL: Via Google Meet
TITLE:

Valorization of industrial waste from Agave sisalana to obtain lignosulfonate and cellulosic ethanol

KEY WORDS:

Sisal residues; second-generation ethanol; biomass pretreatment; lignosulfonates

PAGES: 65
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
SPECIALTY: Processos Bioquímicos
SUMMARY:

Second-generation ethanol (2G), obtained from lignocellulosic biomass, has several advantages, such as avoiding the need to expand agricultural areas. In addition, it significantly reduces greenhouse gas emissions, and can emit up to 90% less CO₂ compared to fossil fuels. Currently, 2G ethanol production represents less than 1% of ethanol in Brazil, where an average of 34.2 billion liters of conventional ethanol was recorded in 2024. On the other hand, sisal residue (Agave sisalana Perrine), which includes the leaves and fibers not used after fiber extraction, has been increasingly used as a source of lignocellulosic biomass due to its favorable properties and the abundance of this material in regions where the plant is cultivated, such as Brazil and other tropical countries, with Brazil being the world's largest producer of sisal. Thus, within a biorefinery context, this proposal aims to produce 2G ethanol and lignosulfonate from industrial residue of Agave sisalana (sisal). Thus, it will be evaluated (i) the influence of organosolv and deep eutectic solvent (DES) pretreatments, (ii) the capacity to recycle the main compounds used in pretreatments, (iii) the efficiency of using lignosulfonate, produced from residual lignin from pretreatment, in the enzymatic hydrolysis stage.

COMMITTEE MEMBERS:
Presidente - 1346198 - EVERALDO SILVINO DOS SANTOS
Interno - ***.656.434-** - CARLOS EDUARDO DE ARAÚJO PADILHA - UFRN
Externa à Instituição - BRUNA MARIA EMERENCIANO DAS CHAGAS - UFRN