Design of catalysts with controlled porosity and variable acidity for the synthesis of industrialized products

Abstract

By using nanotechnology and the versatility in the micro-mesoporous solids synthesis, it was possible to design and synthesize catalysts with custom-controlled acidity. Aluminum or boron modified MCM-41 type nanocatalysts (Si/metal = 20) were synthesized by “conventional way” showed a very weak and moderate Brønsted acidity, respectively, caused by the formation of nest silanols due the incorporation of the heteroatom. Aluminosilicates were also synthesized by “zeolitic precursors assembly way” and the presence of these zeolitic domains caused a greater acidic strength. Thus, this development of catalysts with active sites within range of acid strength allows manage the synthesis of different industrial interest compounds.