Mn/MgAl2O4 oxygen carriers for chemical looping combustion using coal: influence of the thermal treatment on the structure and reactivity

Autor: RA Medeiros, Heloísa P. Macedo, Dulce Maria de Araújo Melo, Ângelo A.S. Oliveira, Marcus Antônio de Freitas Melo, Rebecca Araújo Barros do Nascimento, Tiago R. Costa

Publikováno v: Journal of Thermal Analysis and Calorimetry. 140:2673-2685

Mn-based solid oxygen carriers supported on MgAl2O4 were prepared by the microwave-assisted combustion method followed by wet impregnation of the active phase. The oxygen carriers were characterized by X-ray diffraction, temperature-programmed reduct

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::779e1531b5928a160cba06e2eb677db8
https://doi.org/10.1007/s10973-019-09014-w

A comparative study of dry reforming of methane over nickel catalysts supported on perovskite-type LaAlO3 and commercial α-Al2O3

Autor: RA Medeiros, Renata Martins Braga, Marcus Antônio de Freitas Melo, Heloísa P. Macedo, Ângelo A.S. Oliveira, Dulce Maria de Araújo Melo, Gilvan Pereira de Figueredo, José Manuel Rivas Mercury

Publikováno v: Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN

A systematic and comparative study was made to determine the influence of perovskite-type LaAlO3 and commercial α-Al2O3 on the performance of nickel-based catalysts in dry reforming of methane (DRM). The perovskite-type LaAlO3 was selected due to it

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce9d107851018d086d60d96e215ce6bf
https://doi.org/10.1016/j.ijhydene.2018.04.224

The influence of Ni and Co supported in the Brazilian diatomite for H2 production via methane dry reforming

Autor: Gineide Conceição Anjos, Elania Maria Fernandes Silva, E. V. Sobrinho, RA Medeiros, Ângelo A.S. Oliveira, Dulce Maria de Araújo Melo, Cássia Carvalho de Almeida

Publikováno v: Research, Society and Development; Vol. 10 No. 11; e388101119729
Research, Society and Development; Vol. 10 Núm. 11; e388101119729
Research, Society and Development; v. 10 n. 11; e388101119729
Research, Society and Development
Universidade Federal de Itajubá (UNIFEI)
instacron:UNIFEI

A diatomita brasileira foi usada como suporte catalítico para a reforma a seco do metano. As fases ativas utilizadas foram Ni e Co em diferentes concentrações. Os catalisadores foram calcinados a 500 °C por 5 he caracterizados por DRX, BET, TPR e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ba2d5a93a56a2b50528a7f8f1727617
https://doi.org/10.33448/rsd-v10i11.19729

Characterization of ZnAl2O4 Spinel Obtained by Hydrothermal and Microwave Assisted Combustion Method: A Comparative Study

Autor: Ângelo A.S. Oliveira, Heloísa P. Macedo, RA Medeiros, Dulce Maria de Araújo Melo, Gilvan Pereira de Figueredo, Marcus Antônio de Freitas Melo, Amanda Lucena de Medeiros

Publikováno v: Materials Research, Vol 20, Iss suppl 2, Pp 29-33 (2017)
Materials Research v.20 suppl.2 2017
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Materials Research, Issue: ahead, Published: 02 MAY 2017
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN

In this work, zinc aluminate spinel was prepared by two methods of directly synthesis (without calcination): microwave assisted combustion and hydrothermal method. The materials were characterized by X-ray diffraction (XRD), scanning electron microsc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f57cc68faa8e4cf71e9720eacac24d04
http://www.scielo.br/pdf/mr/v20s2/1516-1439-mr-1980-5373-MR-2016-0977.pdf

One-pot microwave-assisted combustion synthesis of Ni-Al2O3 nanocatalysts for hydrogen production via dry reforming of methane

Autor: Raimundo C. Rabelo-Neto, Heloísa P. Macedo, Renata Martins Braga, Ângelo A.S. Oliveira, Marcus Antônio de Freitas Melo, RA Medeiros, Gilvan Pereira de Figueredo, Dulce Maria de Araújo Melo

Publikováno v: Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN

Ni-based catalysts supported on Al2O3 were obtained via a simple, low cost and fast one-pot microwave-assisted combustion synthesis. The effect of fuel content (urea) was investigate. It was observed that the fuel ratio greatly influences the catalys

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a88b004239eec218ed93b5de899c8f65
https://doi.org/10.1016/j.fuel.2020.119511