Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Marlín Villarroel"'
Evaluación del tiempo de cristalización en la preparación de la zeolita BEA por síntesis hidrotermal
Autor:
Julio Colmenares-Zerpa, Génesis Márquez, Miguel Delgado, Jines Contreras, Alirio Balza, Delsy Dávila, Marlín Villarroel, Claudio Lugo, Freddy Imbert, Pedro Rodríguez-Sulbarán
Se preparó una serie de materiales zeolíticos tipo BEA por síntesis hidrotermal variando el tiempo de cristalización, a partir de un gel con relación nominal Si/Al=25. Se empleó hidróxido de tetraetilamonio (TEAOH) como agente director de estr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bae57476034ef196d52e793b2c9032d
Autor:
Claudio Lugo, Jairo Rondón, Patricia Pérez, Hildemaro Meléndez, Pedro Rodríguez, Edder García, Marlin Villarroel, Manuel Pérez, Ledys Sánchez, Freddy Imbert, Héctor Del Castillo
Publikováno v:
Avances en Química, Vol 8, Iss 1, Pp 29-40 (2013)
We have prepared mixed oxides of NiO/MgO-La2O3 by varying the proportions of the support through of the successive impregnation method. Different techniques were used to determine their physical-chemical properties, EDX analysis, X-ray diffraction, X
Externí odkaz:
https://doaj.org/article/0b3dca3d549f4263b48440f7410c8e06
Autor:
Claudio Lugo, Jairo Rondón, Hildemaro Melendez, Edder Garcia, Marlin Villarroel, Patricia Pérez, José Mercado, Héctor Del Castillo
Publikováno v:
Avances en Química, Vol 7, Iss 1, Pp 19-26 (2012)
Mixed oxide catalysts of NiO/MgO-La2O3 varying the proportions support were synthesized through the Lunsford method, successive impregnation. Different techniques were used to determine their physicochemical properties., EDX analysis, FTIR spectrosco
Externí odkaz:
https://doaj.org/article/cef4b6c5b1694de38b918d0a37b9132f
Autor:
Edder García, Pedro Rodríguez, Alirio Lobo, Pedro Hoffman, Álvaro Uzcategui, Marlin Villarroel, Héctor Del Castillo, Sergio González Cortes, Freddy E. Imbert
Publikováno v:
Avances en Química, Vol 5, Iss 2, Pp 99-105 (2010)
The m-xylene isomerization was studied on mesoporous catalyst type MCM-48, which was impregnated with tungstophosphoric acid. The synthesis was carried out hydrothermally at 423 K, using cetyl trimethyl ammonium bromide (CTMABr) as the structural dir
Externí odkaz:
https://doaj.org/article/886ad87a750146f194196e5da8b3d146
Autor:
Lynda Belandria, Freddy Imbert, Edder Garcia, Jairo Rondón, Mauricio Marín, Marlin Villarroel, Alvaro Uzcátegui
Publikováno v:
Avances en Química, Vol 5, Iss 1, Pp 67-71 (2010)
Conversion of n-pentane and selectivity to isomerisation are affected by changes in the acidity of the catalyst. In this study, the mesoporous MCM-41was used as the support, and Pt was incorporated by the method of solid-state ion exchange, and tungs
Externí odkaz:
https://doaj.org/article/72df6e25daf9469bba1c27055d3325b9