Banca de DEFESA: FLAVIA BARTIRA PEDRO DA SILVA ALMEIDA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : FLAVIA BARTIRA PEDRO DA SILVA ALMEIDA
DATA : 07/10/2019
HORA: 09:00
LOCAL: Sala de Congregação da Escola Politécnica da UFBA
TÍTULO:

REMOVAL OF HYDROCARBONS FROM PETROLEO PRODUCED WATER THROUGH COALESCENCE AND ADSORPTION PROCESSES

PALAVRAS-CHAVES:

water produced; pyrolysis; coalescer; fixed bed column.

PÁGINAS: 185
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Produção
RESUMO:

A major problem for the oil production industry is the amount of water produced (PA) generated during the operation of its industrial processes, being considered the largest stream of effluents and has complex composition such as high salinity, suspended solids, chemical additives. , heavy metals, considered to be oil and grease (TOG) content and other contaminants. The TOG is a parameter that deserves attention, as regulatory agencies regulate the discarding of PA from this parameter. The present work aimed to evaluate the potential of the coalescence and adsorption process in the treatment of real oil produced water supplied by Petrobras, Pilar-AL Unit, using an integrated system composed of a horizontal bed coalescer in combination with a fixed bed of adsorption. The parameters evaluated in the coalescer were the flow velocity and the bed type. The materials evaluated to compose the coalescedor bed were: coconut fiber, considered a byproduct of the industry and the vegetable bushing (Luffa cylindrica), an easy material to be found in the Northeast region. The fixed bed column (adsorption process) used biochar and activated carbon produced from ouricuri (Syagrus coronata), a regional raw material. The biomasses used (coconut fiber, vegetable bushing and ouricuri, as well as biochar and activated charcoal) were characterized by the following techniques: humidity, thermogravimetric analysis, X-ray dispersive energy (EDX), X-ray diffraction and infrared by Fourier transform. Initially, the type of bed and the flow rate of the coalescing bed were evaluated: 40, 60 and 80 L / h, which corresponds, respectively, to superficial velocities 5,8; 8.7 and 11.5 m / h in relation to the diameter of the coalescer. The TOG at the coalescer inlet and outlet was evaluated and the oil and grease removal efficiency calculated. The coalescer pressure drop was also evaluated. Coconut fiber and 40 L / h flow rate showed higher efficiency, removing around 80% of TOG. Then, as mentioned earlier, coals were produced from ouricuri and activated with phosphoric acid, sulfuric acid and sodium hydroxide. The adsorptive capacity evaluation experiments were carried out in a finite bath system. The results showed that NaOH activated carbon has higher adsorptive capacity. Defined the best bed type and coalescer feed rate, plus the activated bed activated carbon type; Studies with the integrated system (coalescer and fixed bed column) could be initiated. The experimental design consisted of a complete factorial system 23 for the experimental runs in the integrated system, where the evaluated variables were: coal type (biochar and NaOH-activated carbon), mean particle diameter (0.149 - 0.3 mm and 0.3 - 0.5 mm) and fixed bed column flow rate (2.2 and 4.4 L / h). The best result was obtained with the experiment that used biochar, particle diameter between 0.149 - 0.3 mm and flow rate of 4.4 L / h, achieving a TOG removal of around 84%. The results showed that the integration of adsorption coalescence processes using biomass and biochar can be an alternative for the treatment of petroleum produced water, meeting the environmental requirements for disposal and reinjection.

MEMBROS DA BANCA:
Externo à Instituição - ALBERICO RICARDO PASSOS DA MOTTA
Externo à Instituição - CARLOS EDUARDO DE FARIAS SILVA
Externo à Instituição - JOÃO INACIO SOLETTI
Presidente - 2574950 - KARLA PATRICIA SANTOS OLIVEIRA RODRIGUEZ ESQUERRE
Externo ao Programa - 1741302 - LUCIANO MATOS QUEIROZ
Interno - 1675191 - MARCIO LUIS FERREIRA NASCIMENTO