Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Joana M. F. Barros"'
Autor:
Ana Carla S. L. S. Coutinho, Joana M. F. Barros, Marcio D. S. Araujo, Jilliano B. Silva, Marcelo J. B. Souza, Regina C. O. B. Delgado, Valter J. Fernandes Jr., Antonio S. Araujo
Publikováno v:
Catalysts, Vol 14, Iss 3, p 198 (2024)
Heterogeneous catalysts containing cobalt and molybdenum supported on mesoporous materials types SBA-15 and AlSBA-15 were synthesized for application in the HDS reactions of thiophene in the n-heptane stream. The materials were synthesized by the hyd
Externí odkaz:
https://doaj.org/article/e0bfad04b4fc4cdc82a48f3a7be16bb6
Autor:
Joana M. F. Barros, Glauber J. T. Fernandes, Marcio D. S. Araujo, Dulce M. A. Melo, Amanda D. Gondim, Valter J. Fernandes, Antonio S. Araujo
Publikováno v:
Nanomaterials, Vol 13, Iss 3, p 382 (2023)
The nanostructured lanthanide-silica materials of the Ln–SiO2 type (Ln = La, Ce, Pr, Nd, Eu, Gd, Dy, Yb, Lu) were synthesized by the hydrothermal method at 100 °C, using cetyltrimethylammonium as a structural template, silica gel and sodium silica
Externí odkaz:
https://doaj.org/article/6747efe76b3b4dc2bb13bf0ef522b7af
Autor:
Alexandre Fontes Melo de Carvalho, E. V. Sobrinho, Marcus Antônio de Freitas Melo, Renata Martins Braga, Maria do Socorro B. Fontes, Julio Cezar de Oliveira Freitas, Joana M. F. Barros, Dulce Maria de Araújo Melo
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Recently, zeolites have been widely applied in catalytic pyrolysis to improve physical and chemical properties of bio-oil to produce energy or to selectively produce chemicals for industry. This study aims to analyze the catalytic pyrolysis products
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65c9bdfa96130791a4e74d4d023d99c3
https://doi.org/10.1016/j.cattod.2016.06.003
https://doi.org/10.1016/j.cattod.2016.06.003
Autor:
Dulce Maria de Araújo Melo, Joana M. F. Barros, RA Medeiros, V. R. M. Melo, Marcus Antônio de Freitas Melo, Heloísa P. Macedo, Ângelo A.S. Oliveira
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
The present paper studied the influence of the concentrations of nickel and iron and the reaction temperature in catalysts tested in the dry reforming of methane, using a factorial design to optimize the H2 yield ( Y H 2 ) . Iron was selected due to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ca52da4c540faa1ba874072562ab229
https://doi.org/10.1016/j.ijhydene.2016.06.246
https://doi.org/10.1016/j.ijhydene.2016.06.246
Autor:
Marcus Antônio de Freitas Melo, Cíntia de Castro Costa, Maria do Socorro Braga Fontes, Joana M. F. Barros, Antonio Eduardo Martinelli, Dulce Maria de Araújo Melo
Publikováno v:
Applied Mechanics and Materials. 830:11-18
The CO2 adsorption technology using solid adsorbent shas been considered as a promising approach to reduce CO2 emissions. Therefore, research has been developed to obtain efficient and economically viable adsorbents. The mesoporous materials of the M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28ad6f85ce633b4a715966404a80fd2d
https://doi.org/10.4028/www.scientific.net/amm.830.11
https://doi.org/10.4028/www.scientific.net/amm.830.11
Autor:
Marcus Antônio de Freitas Melo, Dulce Maria de Araújo Melo, Antonio Eduardo Martinelli, Cíntia de Castro Costa, Joana M. F. Barros, Maria S. B. Fontes
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
This work assessed the thermal degradation of surfactants, i.e., tetradecyltrimethylammonium bromide (TTMA+—C17H38NBr), cetyltrimethylammonium bromide (CTMA+—C19H42NBr) and trimethyloctadecylammonium bromide (DTMA+—C21H46NBr), used to obtain MC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4983b20769ef27e3f5da42e502334b20
https://doi.org/10.1007/s10973-015-4864-x
https://doi.org/10.1007/s10973-015-4864-x
Autor:
Marcus Antônio de Freitas Melo, J. M. Andrade, Joana M. F. Barros, M.E. Mendoza, J. C. Nascimento, Dulce Maria de Araújo Melo, Cíntia de Castro Costa
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
CO2 capturing technologies have attracted significant attention in order to limit emissions and reduce their negative effect on the environment. Mesoporous silica materials (MCM-41) are easily recyclable, affordable, and thermally and mechanically st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0e2bef32e64e8410ac850318a42ec73
https://doi.org/10.1007/s10934-014-9857-9
https://doi.org/10.1007/s10934-014-9857-9
Autor:
Renata Martins Braga, Dulce Maria de Araújo Melo, Joana M. F. Barros, Vilsineia A. Fontes, Marcus Antônio de Freitas Melo, Maria do Socorro B. Fontes
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Thermogravimetry analysis was used to study the thermal decomposition of Ti-MCM-41 to determine the best calcination conditions. Ti-MCM-41 molecular sieve was synthesized using a hydrothermal route in which Ti ions were incorporated into the pore cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d1eb60511774585b976e5a70269d90e
https://doi.org/10.1007/s10973-014-4099-2
https://doi.org/10.1007/s10973-014-4099-2
Characterization and comparative study of pyrolysis kinetics of the rice husk and the elephant grass
Autor:
Julio Cezar de Oliveira Freitas, Marcus Antônio de Freitas Melo, F. M. Aquino, Renata Martins Braga, Joana M. F. Barros, Maria do Socorro Braga Fontes, Dulce Maria de Araújo Melo
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 115:1915-1920
A comparative evaluation of different biomasses allows the choice that presents the best potential as fuel for energy production. The knowledge of the thermal and kinetics parameters of the biomass in the process of thermal conversion is fundamental
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4fba252d1d3f26f344ad3015d334f47
https://doi.org/10.1007/s10973-013-3503-7
https://doi.org/10.1007/s10973-013-3503-7
Autor:
Renata Martins Braga, Joana M. F. Barros, Marcus Antônio de Freitas Melo, Julio Cezar de Oliveira Freitas, F. M. Aquino, Dulce Maria de Araújo Melo, R.C. Santiago
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Molecular sieves MCM-41 were synthesized from rice husk ash (RHA) as alternative sources of silica, called RHA MCM-41. The material was synthesized by a hydrothermal method from a gel with the molar composition 1.00 CTMABr:4.00 SiO2:1.00 Na2O:200.00
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::280444e02bfde3bd4b9f3c749a014db7
https://doi.org/10.1007/s10973-012-2516-y
https://doi.org/10.1007/s10973-012-2516-y