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Characterization of bifunctional Pt/H[Ga]ZSM5 and Pt/H[Al]ZSM5 catalysts

“…The coincidence of Si/M ratios (Table 1) means that both catalysts exhibit a very similar density of acidic sites. Previous results suggest that there is a slight difference in the strength of the acid sites, as the gallosilicate and the aluminosilicate desorb ammonia up to 400 and 470 • C, respectively [21,27].…”

Acetone condensation over molybdenum nitride and carbide catalysts

“…Typically, the production of these chemicals from acetone involves multiple condensation and dehydration steps that are catalyzed by liquid acids and bases. The use of these corrosive liquids presents handling problems and hazardous waste disposal challenges [17,18]. There is increasing interest in the development of a single step, vapor phase process to replace the liquid phase processes [19][20][21].…”

Layered double hydroxides: precursors for multifunctional catalysts

“…This process generates large amounts of wastes and there was a great incentive to implement a more eco-friendly process based on heterogeneous catalysis. Several industrial processes [9][10][11][12], as well as academic studies [13][14][15][16][17][18][19][20][21][22][23][24][25][26], spanning a wide variety of multifunctional solid catalysts, were thus reported. Some of those dealt with bifunctional acid/metal catalysts [13][14][15][16], and others with multifunctional base/acid/ metal catalysts [17][18][19][20][21][22][23][24][25][26].…”

“…Several industrial processes [9][10][11][12], as well as academic studies [13][14][15][16][17][18][19][20][21][22][23][24][25][26], spanning a wide variety of multifunctional solid catalysts, were thus reported. Some of those dealt with bifunctional acid/metal catalysts [13][14][15][16], and others with multifunctional base/acid/ metal catalysts [17][18][19][20][21][22][23][24][25][26]. Most promising materials may belong to the latter category exhibiting very different acid-base and hydrogenating properties, such as MgOsupported Ni, Pd and Cu [17][18][19], Pd on ALPO and SAPO [20], Pt supported on the basic CsX zeolite [21], and Pd, Ni and Cu-based catalysts derived from LDH precursors [22][23][24][25][26].…”