Captura de CO2 em mistura multicomponente utilizando microrreatores
The natural gas associated with the oil extracted from the pre-salt layer presents expressive CO2 contents (>30 mol%), which makes it unfeasible to market directly from the platforms. Thus, CO2 must be removed from the natural gas at least to the concentration required by the ANP, maximum of 3...
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Captura de CO2 Coeficiente de transferência de massa global Microrreação Água MEA Pré-sal CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
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Captura de CO2 Coeficiente de transferência de massa global Microrreação Água MEA Pré-sal CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA Almeida, Sarah Natacha de Oliveira Captura de CO2 em mistura multicomponente utilizando microrreatores |
| description |
The natural gas associated with the oil extracted from the pre-salt layer presents
expressive CO2 contents (>30 mol%), which makes it unfeasible to market directly from
the platforms. Thus, CO2 must be removed from the natural gas at least to the
concentration required by the ANP, maximum of 3 % mol/mol, to make it commercial.
The microreaction system has reached great interest in the last decades due its capacities
in the process intensification. In this configuration, the process occurs continuously, with
the reactions and the transfer phenomena happening 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. In this work, the CO2
absorption process in water and amine (MEA) was studied in different kinds of
microreactor (System T, Funnel-type microreactor, Type T microreactor and
Microreactor Junction T) and evaluated in different gas phase compositions (with N2/CO2
and N2/CO2/CH4). Also, experiments were performed under operational conditions with
different gas / liquid volumetric ratio. The microreactors evaluated had a hydraulic
diameter between 0.28 and 1.5 mm and were operated at atmospheric pressure and at
room temperature. The microreactor system has pumps, valves, microreactor,
microseparator, pressure and temperature sensors, and a chromatograph connected in line
to analyze the composition of the gas mixture at the system outlet..In general, the flow
regime was slug, and the results indicated that the maximum CO2 removal efficiency
using the T-junction microreactor occurred with removal efficiency greater than 90%
using water as solvent with gas / liquid volumetric ratio of 7:30. The efficiency was 100%
when was used MEA solution with concentration above 0.5 M in all operational condition
studied. |
| author2 |
Oliveira, Jackson Araújo de |
| author_facet |
Oliveira, Jackson Araújo de Almeida, Sarah Natacha de Oliveira |
| format |
masterThesis |
| author |
Almeida, Sarah Natacha de Oliveira |
| author_sort |
Almeida, Sarah Natacha de Oliveira |
| title |
Captura de CO2 em mistura multicomponente utilizando microrreatores |
| title_short |
Captura de CO2 em mistura multicomponente utilizando microrreatores |
| title_full |
Captura de CO2 em mistura multicomponente utilizando microrreatores |
| title_fullStr |
Captura de CO2 em mistura multicomponente utilizando microrreatores |
| title_full_unstemmed |
Captura de CO2 em mistura multicomponente utilizando microrreatores |
| title_sort |
captura de co2 em mistura multicomponente utilizando microrreatores |
| publisher |
Brasil |
| publishDate |
2018 |
| url |
https://repositorio.ufrn.br/jspui/handle/123456789/25290 |
| work_keys_str_mv |
AT almeidasarahnatachadeoliveira capturadeco2emmisturamulticomponenteutilizandomicrorreatores |
| _version_ |
1773961865111535616 |
| spelling |
ri-123456789-252902019-01-30T11:42:26Z Captura de CO2 em mistura multicomponente utilizando microrreatores Almeida, Sarah Natacha de Oliveira Oliveira, Jackson Araújo de Cruz, Juan Alberto Rojas Lopes, Francisco Wendell Bezerra Souza, José Roberto de Ruiz, Juan Alberto Chavez Captura de CO2 Coeficiente de transferência de massa global Microrreação Água MEA Pré-sal CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA The natural gas associated with the oil extracted from the pre-salt layer presents expressive CO2 contents (>30 mol%), which makes it unfeasible to market directly from the platforms. Thus, CO2 must be removed from the natural gas at least to the concentration required by the ANP, maximum of 3 % mol/mol, to make it commercial. The microreaction system has reached great interest in the last decades due its capacities in the process intensification. In this configuration, the process occurs continuously, with the reactions and the transfer phenomena happening 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. In this work, the CO2 absorption process in water and amine (MEA) was studied in different kinds of microreactor (System T, Funnel-type microreactor, Type T microreactor and Microreactor Junction T) and evaluated in different gas phase compositions (with N2/CO2 and N2/CO2/CH4). Also, experiments were performed under operational conditions with different gas / liquid volumetric ratio. The microreactors evaluated had a hydraulic diameter between 0.28 and 1.5 mm and were operated at atmospheric pressure and at room temperature. The microreactor system has pumps, valves, microreactor, microseparator, pressure and temperature sensors, and a chromatograph connected in line to analyze the composition of the gas mixture at the system outlet..In general, the flow regime was slug, and the results indicated that the maximum CO2 removal efficiency using the T-junction microreactor occurred with removal efficiency greater than 90% using water as solvent with gas / liquid volumetric ratio of 7:30. The efficiency was 100% when was used MEA solution with concentration above 0.5 M in all operational condition studied. O gás natural associado ao petróleo extraído da camada do pré-sal apresenta expressivos teores de CO2 (>30% molar), o que torna inviável sua comercialização diretamente das plataformas. Dessa forma, o CO2 deverá ser removido do gás natural pelo menos até a concentração exigida pela ANP, máximo de 3% molar, para torná-lo comercial. O sistema de microrreação tem alcançado grande interesse nas últimas décadas devido à intensificação de processos químicos. Nesta configuração, o processo ocorre de modo contínuo, sendo as reações e os fenômenos de transferência decorrentes na forma individualizada com máximos gradientes. Uma característica a se destacar nestes reatores, em comparação com os reatores químicos convencionais, é a maior relação área superficial/volume, o que favorece um maior rendimento, seletividade e eficiência energética da reação.Neste trabalho, o processo de absorção do CO2 em água e em amina (MEA) foi estudado em diferentes tipos de microrreatores (Sistema T; Microrreator tipo funil; Microrreator Tipo T; e Microrreator Junção T) e avaliado em diferentes composições para a fase gasosa (com N2, CO2 e CH4). Também, foram realizados experimentos em condições operacionais com distintos valores de razão volumétrica gás/líquido.Os microreatores avaliados possuem diâmetro hidráulico entre 0,28 a 1,5 mm e foram operados em pressão atmosférica e temperatura ambiente, sendo o sistema de microrreação constituído de bombas, válvulas, microreator, microsseparador, sensores de pressão e temperatura, e um cromatógrafo a gás conectado em linha para analisar a composição da mistura gasosa na saída do sistema. Em geral, o regime de escoamento caracterizado foi do tipo slug, e os resultados apontaram que a máxima eficiência de remoção de CO2usando o Microrreator Junção T ocorreu com eficiência de remoção superior a 90% e razão volumétrica gás/líquido de 7:30 sem MEA e foi de 100% para concentrações de MEA acima de 0,5 M em todas as razões volumétricas gás/líquido estudadas. 2018-06-07T00:27:46Z 2018-06-07T00:27:46Z 2018-02-05 masterThesis ALMEIDA, Sarah Natacha de Oliveira. Captura de CO2 em mistura multicomponente utilizando microrreatores. 2018. 83f. Dissertação (Mestrado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2018. https://repositorio.ufrn.br/jspui/handle/123456789/25290 por Acesso Aberto application/pdf Brasil UFRN PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA QUÍMICA |