Preparation of Tubular MCM-48 Membranes

MARISA N. PEDERNERA; OSCAR DE LA IGLESIA; REYES MALLADA; JOAQUÍN CORONAS; JESÚS SANTAMARÍA

Río de Janeiro, (Brasil)

Congreso; 4ht MERCOSUR Congress on Process Systems Engineering (EMPROMER 2005); 2005

Universidade Federal do Rio de Janeiro -Universidade do Estado do Rio de Janeiro -Universidade Federal Fluminense -Instituto Militar de Engenharia -Universidade Federal Rural do Rio de Janeiro

  Abstract. Based on the changing requirements of the catalytic industry, in the last decade much effort has been expended in producing materials with larger pores. In 1992 Mobil Oil Corporation published the synthesis of a group of mesoporous materials, designed M41S. The M41S include members having uniform pore structures of hexagonal (MCM-41) and cubic (MCM-48) symmetry. These materials are characterized by narrow pore size distributions, tunable from 2 to10 nm and large surface areas (>1000 m2/g). Perhaps the most promising advances in these materials will arise from the combined use of the high surface area and favorable surface chemistry. Both features permit their modification by incorporation of heteroelements or transition metals in the framework or by a modification of the surface. All of them make these materials very attractive for numerous applications such as catalysis, separations, and encapsulation of molecules. The synthesis of inorganic membranes is an intense research field, many contributions have been made concerning to zeolite materials which are ordered microporous structures. In this work the synthesis of mesoporous MCM-48 membranes have been carried out, this mesoporous ordered material will broaden the applications of membranes and thin films to larger molecules than in the case of zeolites. The membranes and powders were characterized with different techniques: XRD, BET specific surface area, SEM, FTIR and permporometry. The obtained membranes were tested in the gas phase separation of mixtures containing organic compounds.