(Elsevier, 2003-03-01) Melo, Dulce Maria de Araújo; Ruiz, Juan Alberto Chavez; Vitor Sobrinho, Eledir; Melo, Marcus Antônio de Freitas; Martinelli, Antonio Eduardo; Zinner, Léa Barbieri
The relative acid strength of lanthanum catalysts supported on paligorskyte was determined by thermodesorption of n-butylamine and infrared absorption spectroscopy. The results indicated that the desorption reaction took place in four temperature ranges. The catalyst containing 2% lanthanum particularly showed a considerable number of acid sites probably as a result of the relatively high specific area of the material
