Banca de DEFESA: FABÍOLA CORREIA DE CARVALHO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : FABÍOLA CORREIA DE CARVALHO
DATE: 30/03/2020
TIME: 14:00
LOCAL: Auditório do CCET/UFRN
TITLE:

EFFICIENCY OF BIMODAL SILICA AS A CARBON DIOXIDE ADSORBENT FOR NATURAL GAS TREATMENT

KEY WORDS:

Carbon dioxide adsorption; Methane; Natural Gas; Porous silica; Meso-macroporous Hybrid Materials

PAGES: 100
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUMMARY:

Natural Gas (NG) production in Brazil has shown a significant increase in recent years, mainly with the operations of pre-salt platforms. Oil and Natural Gas exploration and refining activities account for 86% of estimates of carbon dioxide (CO2) emissions, posing a serious problem for environmental issues related to greenhouse gas emissions and rising global warming., since CO2 is primarily responsible for these climate effects. Thus, new technologies using CO2 capture materials have been shown to be efficient in relation to conventional processes. In this work, a hybrid meso-macroporous silica adsorbent for NG CO2 adsorption was synthesized, promising for use in natural gas treatment systems, as they have specific textural properties for the capture and storage of this gas. The adsorbent was obtained from silica by hydrothermal method and characterized by X-ray diffraction, scanning electron microscopy and specific surface area by BET method. Adsorption capacity tests were performed for CO2, methane (CH4) and their mixtures, in a magnetic suspension microbalance, demonstrating that the adsorbent was selective for CO2 and obtaining a good adsorption capacity (9,10 mmol.g-1). The experimental values obtained were compared and adjusted to the Langmuir and Freundlich models. Thus, the hybrid silica adsorbent developed in the research proved to be excellent for CO2 adsorption and not for CH4, being a promising material for the treatment of NG.

BANKING MEMBERS:
Externa à Instituição - ANA CATARINA FERNANDES CORIOLANO - UFRN
Presidente - 350509 - ANTONIO SOUZA DE ARAUJO
Interno - 348475 - DJALMA RIBEIRO DA SILVA
Externa à Instituição - REGINA CELIA DE OLIVEIRA BRASIL DELGADO - UFERSA
Interno - 1149328 - VALTER JOSE FERNANDES JUNIOR