MAIA, D. F.; http://lattes.cnpq.br/3667151280922633; MAIA, Divanira Ferreira.
Abstract:
The presence of oil in water produced during the petrol extraction can cause serious
problems during the discharge in the environment as well as in the re-injection in the oil
well. The conventional methods used to remove oil from water can not clean with
efficiency and low cost. So, the search for new alternatives to solve this problem is the
motivation of this work. This study is part of a series of researches supported by Agência
Nacional de Petróleo (ANP), with the aim to optimize ali the steps in the oil production.
The aim of this work is to make ceramic membrane to be applied in the oil/water
separation. Firstly, it was prepared two types of tubular alumina membranes, called type
I and type 2, with different pore size of approximately 0.9nm and 15, 48nm, respectively.
The minimal efficiency of these membranes was approximately 97.5% and 93.8% for
membrane type I and type 2, respectively. However, the membrane type 2 shown a flux
40 times greater than the membrane type 1. To improve the use of the membrane type 2
it was coating the internai surface with a thin layer of zircônia to get better efficiency
without to decrease the flux. The zircônia powder was prepared with success by Pechini
method and it was obtained a crystalline zircônia with agglomerates that indicate the use
to make ultrafiltration membranes. To obtain the zircônia layer it was prepared
dispersion and deposited in the internai surface of the membrane type 2 by dip coating
technique. The zircônia layer presented a thickness of 23.88}im, a flux grater than the
alumina type 1 and a minimal efficiency of 97.8%. Ali studied membrane presented oil
content in permeate below 7ppm, using a maximum concentration of lOOOppm in the
feed tank. The permeate water through the studied membranes is in agreement with the
norms to be discharge in the environment or to be re-injected in the oil well.