Buscar
Mostrando ítems 31-40 de 209
Síntese, caracterização e avaliação de compostos de Nióbio como catalisadores para o tratamento de águas e reaproveitamento do glicerol
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA, 2018-10-19)
The largest amount of Niobium reserves of the planet is available at Brazil, which is
estimated at approximately 98%. Despite that, the interest of the government in exploiting
Niobium is limited, what caused a reduction ...
Características estruturais e fotocatalíticas do compósito oxihidróxido de nióbio/vermiculita
(Universidade Federal do Rio Grande do NorteBrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA, 2014-10-31)
The preparation of nanostructured materials using natural clays as support, has been studied in
literature under the same are found in nature and consequently, have a low price. Generally,
clays serve as supports for ...
Obtención de aceros micro-aleados con titanio (Ti), vanadio (V) y niobio (Nb) en horno de inducción
(2016-02-29)
En el presente trabajo se analiza el proceso de fabricación de aceros micro-aleados con titanio, vanadio y nobio, con el uso del horno de inducción a condiciones atmosféricas.
Caracterização e propriedades catalíticas da zeolita HZSM5 modificada com nióbio
(Sociedade Brasileira de Química, 1997-02-01)
HZSM5 zeolite was modified by exchanging proton by niobium (V). Several samples were obtained with various degrees of exchange. Pore volumes and acidity were measured to characterize these exchanged zeolites. Catalytic ...
Caracterização e propriedades catalíticas da zeolita HZSM5 modificada com nióbio
(Sociedade Brasileira de Química, 1997-02-01)
HZSM5 zeolite was modified by exchanging proton by niobium (V). Several samples were obtained with various degrees of exchange. Pore volumes and acidity were measured to characterize these exchanged zeolites. Catalytic ...