Banca de DEFESA: SARAH NATACHA DE OLIVEIRA ALMEIDA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : SARAH NATACHA DE OLIVEIRA ALMEIDA
DATA : 05/02/2018
HORA: 14:00
LOCAL: AUDITÓRIO DO PPGEQ
TÍTULO:

"CO₂ CAPTURE IN MULTICOMPONENT MIXTURE USING MICRO-REACTOR"

PALAVRAS-CHAVES:

CO₂ capture,Global mass transfer coefficient, Microreaction, Water, Amine solution.

PÁGINAS: 75
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

The natural gas associated with the oil extracted from the pre-salt layer presents expressive CO₂ contents (> 30 mol%), which makes it unfeasible to commercialize directly from the platforms, so that the gas must be removed at least to the maximum concentration (3 % molar) required by the ANP to make it profitable. The microreaction system has reached great interest in the last decades due to the intensification of the process. In this configuration, the process occurs continuously, with the reactions and the transfer phenomena occurring in the individualized form with maximum gradients. A feature to be highlighted in these reactors, compared to conventional chemical reactors, is the higher surface area / volume ratio, which favors a higher yield, selectivity and energy efficiency of the reaction. The evaluated microreactors are formed by microchannels with square cross-section with hydraulic diameter between 0.28 to 1.5 mm. The microreaction system consists of pumps, valves, pressure and temperature sensors, microreactor and a microsseparator. The gas-liquid mixture occurs in the microreactor at atmospheric pressure and ambient temperature, and then is separated in the microsseparator, the gas in turn is directed to a gas chromatograph to check the percentage of absorbed CO₂. In this work, the CO₂ absorption process in water and amine (MEA) was studied in different types of microreactors (T-system, funnel type microreactor, T-type microreactor and microreactor T-junction) and evaluated different compositions for the gas phase with N₂, CO₂ and CH₄). Also, experiments were performed under operational conditions with different gas / liquid volumetric ratio values. In general, the flow regime was slug-like, and the results indicated that the maximum CO₂ removal efficiency using the T-junction microreactor occurred with removal efficiency greater than 90% and gas / liquid volumetric ratio of 7:30 without MEA and was 100% for concentrations of MEA above 0.5 M in all gas / liquid volumetric ratios studied.

MEMBROS DA BANCA:
Externo à Instituição - FRANCISCO WENDELL BEZERRA LOPES - UnP
Presidente - 1547970 - JACKSON ARAUJO DE OLIVEIRA
Externo à Instituição - JOSE ROBERTO DE SOUZA - CTGás
Externo à Instituição - JUAN ALBERTO CHAVEZ RUIZ - CTGás