Banca de DEFESA: FLAVIA MELO DE LIMA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : FLAVIA MELO DE LIMA
DATA : 02/03/2018
HORA: 15:00
LOCAL: Auditório do LABCIM
TÍTULO:

Development of adsorbents for removal of thiophene in transport fuels

PALAVRAS-CHAVES:

Adsorption, Thiophene, Shale, Infrared spectroscopy

PÁGINAS: 94
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
RESUMO:

Air quality and concern for the environment and population health have influenced vehicle emissions regulations to call for reductions of sulfur levels of fossil fuels. In this context, the XR is used as adsorbent for the removal of sulfur in the form of thiophene in the fuels, because it is an alternative adsorbent material reducing the environmental impact caused by the disposal of the residue itself. The objective was to find the best adsorption condition of thiophene, using shale as adsorbent impregnated with Cu and Zn. The adsorbents were characterized by different techniques, including thermogravimetric analysis, BET, X-ray fluorescence, X-ray diffraction and scanning electron microscopy. The physical and chemical characteristics of the material were adequate for the adsorption study. The efficiency of the adsorption process was evaluated in terms of sulfur removal in toluene / hexane containing solutions (15/85). The quantification of sulfur present in the liquid phase was determined by near infrared spectroscopy from adsorption experiments by the finite bath method that were conducted at different initial concentrations of sulfur and adsorbent/adsorbate contact time. The results showed that the material exhibits satisfactory adsorption capacity and that the experimental points fit better to the Freundlich model. The kinetic data showed a better correlation with the pseudo second order velocity equation showing the chemisorption as a limiting step. The studied adsorbents have satisfactory selectivity and presented good regeneration after thermal treatment, since it is a factor evaluated in the practical application. Therefore, the present study revealed that retried shale can be used as a sulfur adsorbent material for transport fuels thereby minimizing environmental and economic impacts.

MEMBROS DA BANCA:
Presidente - 1298936 - ANTONIO EDUARDO MARTINELLI
Externo ao Programa - 349770 - DULCE MARIA DE ARAUJO MELO
Externo à Instituição - FABIOLA DIAS DA SILVA CURBELO - UFPB
Externo ao Programa - 1979301 - RENATA MARTINS BRAGA
Externo à Instituição - VÍTOR RODRIGO DE MELO E MELO - NENHUMA