Síntese e Caracterização de Peneiras Moleculares Microcoposas Tipo SAPO-34 e MeAPSO-34 / Synthesis and Characterization of microporous molecular sieves SAPO-34 and MeAPSO-34

AUTOR(ES)

Fernanda Soares Benvindo

DATA DE PUBLICAÇÃO

2006

RESUMO

Samples of SAPO-34 and MeAPSO-34 were prepared by two different procedures taken from literature, with small modifications. For MeAPSO-34 synthesis (Me/Al = 0,025 e 0,0075) Ni, Mn, Fe and Co nitrate were used. The NiAPSO-34 were obtained in two different Ni concentration (Ni/Al ratio of 0,025 and 0,0075). The synthesized samples were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy and temperature programmed dessoption of ammonium. From X-ray diffraction, it was confirmed that samples presenting CHA type structure were obtained. These structure type are characteristical of SAPO-34 and MeAPSO-34 samples. From temperature programmed dessorption of ammonium, it was observed that metal incorporation to SAPO structure results in samples presenting higher acid site density. The total acidity was also function of silica concentration of the sample. Strong acid sites were formed for silica rich samples.

ASSUNTO(S)

conversão de metanol olefin olefinas petroleo e petroquimica heterogeneous catalysis catálise heterogênea methanol conversion

Documentos Relacionados

• Synthesis and characterizaton of molecular sieve SAPO-34 for the production of light olefins from methanol
• CATALYSTS SUPPORTED IN MICRO AND MESOPOROUS MOLECULAR SIEVES FOR THE FISCHER- TROPSCH SYNTHESIS
• SYNTHESIS OF 2,6-DIMETHYLNAPHTHALENE OVER SAPO-11, SAPO-5 AND MORDENITE MOLECULAR SIEVES
• Synthesis of MCM-41 Mesoporous Molecular Sieves Actives in the Basic Catalysis to form Chalcones
• Catalytic combustion of methane by palladium-supported molecular sieves