Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor

A rotating cylinder reactor was designed for the synthesis of niobium carbide powders at 1173 K. Niobium carbide, NbC, was prepared by carbothermal reduction starting from commercial niobium pentoxide powders. The reactor was heated using a custom-made, two-part, hinged, electric furnace with progra...

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Principais autores:	Fontes, Francisco de Assis Oliveira, Gomes, Kalyanne Keyle Pereira, Oliveira, S. A., Souza, Carlson Pereira de, Sousa, João Fernandes de
Formato:	article
Idioma:	English
Publicado em:	Brazilian Journal of Chemical Engineering
Assuntos:	Rotating cylinder Reactor design Carbothermal reaction Niobium carbide Methane
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/32813
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id	ri-123456789-32813
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spelling	ri-123456789-328132021-07-05T19:03:25Z Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor Fontes, Francisco de Assis Oliveira Gomes, Kalyanne Keyle Pereira Oliveira, S. A. Souza, Carlson Pereira de Sousa, João Fernandes de Rotating cylinder Reactor design Carbothermal reaction Niobium carbide Methane A rotating cylinder reactor was designed for the synthesis of niobium carbide powders at 1173 K. Niobium carbide, NbC, was prepared by carbothermal reduction starting from commercial niobium pentoxide powders. The reactor was heated using a custom-made, two-part, hinged, electric furnace with programmable temperature control. The design and operational details of the reactor are presented. The longitudinal temperature gradient inside the reactor was determined. Total reaction time was monitored by a gas chromatograph equipped with an FID detector for determination of methane concentrations. The results show that time of reaction depended on rotation speed. NbC was also prepared in a static-bed alumina reactor using the same conditions as in the previous case. The niobium carbide powders were characterized by X-ray diffraction and compared with commercially available products. Morphological, particle size distribution and surface area analyses were obtained using SEM, LDPS and BET, respectively. Therefore, the present study offers a significant technological contribution to the synthesis of NbC powders in a rotating cylinder reactor 2021-07-05T19:03:24Z 2021-07-05T19:03:24Z 2004-09 article FONTES, Francisco de Assis Oliveira ; GOMES, Kalyanne Keyle Pereira; OLIVEIRA, S. A. DE ; SOUZA, Carlson Pereira de ; SOUSA, João Fernandes de . Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor. Brazilian Journal of Chemical Engineering, Brazil, v. 21, n.3, p. 393-403, 2004. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322004000300004. Acesso em: 23 abr. 2021. http://dx.doi.org/10.1590/S0104-66322004000300004 0104-6632 https://repositorio.ufrn.br/handle/123456789/32813 10.1590/S0104-66322004000300004 en Attribution-NonCommercial 3.0 Brazil http://creativecommons.org/licenses/by-nc/3.0/br/ application/pdf Brazilian Journal of Chemical Engineering
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Rotating cylinder Reactor design Carbothermal reaction Niobium carbide Methane
spellingShingle	Rotating cylinder Reactor design Carbothermal reaction Niobium carbide Methane Fontes, Francisco de Assis Oliveira Gomes, Kalyanne Keyle Pereira Oliveira, S. A. Souza, Carlson Pereira de Sousa, João Fernandes de Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor
description	A rotating cylinder reactor was designed for the synthesis of niobium carbide powders at 1173 K. Niobium carbide, NbC, was prepared by carbothermal reduction starting from commercial niobium pentoxide powders. The reactor was heated using a custom-made, two-part, hinged, electric furnace with programmable temperature control. The design and operational details of the reactor are presented. The longitudinal temperature gradient inside the reactor was determined. Total reaction time was monitored by a gas chromatograph equipped with an FID detector for determination of methane concentrations. The results show that time of reaction depended on rotation speed. NbC was also prepared in a static-bed alumina reactor using the same conditions as in the previous case. The niobium carbide powders were characterized by X-ray diffraction and compared with commercially available products. Morphological, particle size distribution and surface area analyses were obtained using SEM, LDPS and BET, respectively. Therefore, the present study offers a significant technological contribution to the synthesis of NbC powders in a rotating cylinder reactor
format	article
author	Fontes, Francisco de Assis Oliveira Gomes, Kalyanne Keyle Pereira Oliveira, S. A. Souza, Carlson Pereira de Sousa, João Fernandes de
author_facet	Fontes, Francisco de Assis Oliveira Gomes, Kalyanne Keyle Pereira Oliveira, S. A. Souza, Carlson Pereira de Sousa, João Fernandes de
author_sort	Fontes, Francisco de Assis Oliveira
title	Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor
title_short	Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor
title_full	Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor
title_fullStr	Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor
title_full_unstemmed	Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor
title_sort	niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor
publisher	Brazilian Journal of Chemical Engineering
publishDate	2021
url	https://repositorio.ufrn.br/handle/123456789/32813
work_keys_str_mv	AT fontesfranciscodeassisoliveira niobiumcarbidesynthesisbysolidgasreactionusingarotatingcylinderreactor AT gomeskalyannekeylepereira niobiumcarbidesynthesisbysolidgasreactionusingarotatingcylinderreactor AT oliveirasa niobiumcarbidesynthesisbysolidgasreactionusingarotatingcylinderreactor AT souzacarlsonpereirade niobiumcarbidesynthesisbysolidgasreactionusingarotatingcylinderreactor AT sousajoaofernandesde niobiumcarbidesynthesisbysolidgasreactionusingarotatingcylinderreactor
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Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor

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