Kinetic parameters of surfactant remotion occluded in the pores of the AlMCM-41 nanostructured materials

摘要

AlMCM-41 molecular sieves were synthesized starting from a hydrogel with the following molar composition: 4.58 SiO_2: 0.0485 Na_2O: 1 CTMABr. 0.038 Al_2O_3: 200 H_2O. cethyltrimethylammonium bromide (CTMABr) was used as structure template. The obtained materials were characterized by XRD, nitrogen adsorption (BET, BJH), FT-IR and TG/DTG. The model-free kinetic algorithms were applied to determinate conversion, isoconversion and apparent activation energy to decomposition of the CTMA+ species from the AlMCM-41 materials synthesized by different aluminum sources