Banca de DEFESA: DANIEL NOBRE NUNES DA SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : DANIEL NOBRE NUNES DA SILVA
DATE: 14/11/2019
TIME: 14:00
LOCAL: Nupprar
TITLE:

Study of solid-liquid extraction for drilling cutting treatment using Microemulsion

KEY WORDS:

solid remediation, solid-liquid extraction, microemulsion, n-paraffin, ultrasonic extraction.

PAGES: 85
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

The wish for economic development is linked to the increased consumption of fossil fuels and consequently a growing generation of toxic waste to the environment. Drill cuttings is one of these wastes, which in addition to being highly toxic, due to the presence of n-paraffin from the drilling fluid adsorbed to it (waste class I - NBR 10004: 2004), is also generated in large quantities. This study presents an alternative to the treatment of drill cuttings (vertical drill cuttings dryer) using microemulsion systems, aiming at the removal of this n-paraffin and thereby reducing environmental impact. For this task it was necessary to study the solid-liquid extraction between the systems (solvents) and drill cuttings. The variables of the solid-liquid extraction (solvent, solvent/drill cuttings ratio, stirring speed and contact time) were studied, as well as the methodology of ultrasonic extraction, used as the best possible extraction. Gas chromatographic analysis with flame ionization detector (GC-FID) was used to quantify the extracts. The obtained results showed that the microemulsion using the L90 surfactant (AP= 83%, C/S=16% e OP=1%) obtained better performance with 55.6% extraction of n-paraffin. In the study of the microemulsion/drill cuttings ratio, the ratio equal 1.0 obtained better result (55.39% extraction), whereas using 2.0 the extraction was 56.32%. In the study with the stirring speed was identified that the higher the speed the better extraction (56.24%), but it was identified that small stirring speed is reduced to extraction (46.12%). In the parameter of contact time an increase in the percentage of extraction with the increase of the time was also found, reaching levels higher than 80% of extraction with time of 160 minutes, but with time of 80 minutes has already reached percentage of extraction of 76%. It was concluded that the use of microemulsion systems promoted the treatment of drill cuttings at high levels, for chemical extraction, allowing a viable alternative for waste treatment and placing it at levels of acceptable contaminants (6.9% of fluid retained in the drill cuttings - US EPA, 2000).

Keywords: solid remediation, solid-liquid extraction, microemulsion, n-paraffin, ultrasonic extraction.

BANKING MEMBERS:
Interno - 347289 - AFONSO AVELINO DANTAS NETO
Externo ao Programa - 1753094 - ALCIDES DE OLIVEIRA WANDERLEY NETO
Externa à Instituição - KLISMERYANE COSTA DE MELO - IFRN
Presidente - 347057 - TEREZA NEUMA DE CASTRO DANTAS
Externa ao Programa - 1531209 - VANESSA CRISTINA SANTANNA
Externo à Instituição - ZILVAM MELO DOS SANTOS - UFERSA