The minimization of the emissions of nitrogen oxides (NOx) in the atmosphere has been one of the great goals in the area of environmental protection. Among the possible processes to treat the NOx, the selective catalytic ...

Low density polyethylene was converted into hydrocarbons over Zn- and H-ZSM-11 zeolite catalysts in a fixed-bed reactor during 20 and 60 min reaction time, 0.5 and 2.0 polymer to catalyst mass ratio at 500 °C. The zeolites ...

The research addressed the generation of mesoporosity in the zeolite ZSM-12 (MTW). In the first part we studied the synthesis of ZSM-12 via conventional methodology and in the presence of a mesopore directing agent, ...

The objective of this study was to verify the influence of the Si/Al ratio (11.5, 15.0, 25.0, 40.0 and 140.0) in zeolite ZSM-5 in the conversion, activity, selectivity and stability as bifunctional catalysts (Pt/H-ZSM-5) ...

Diverse ZSM-5 zeolites having a dual porosity and different acidic properties have been prepared using natural Perlite as source of SiO2 and Al2O3. Two traditional methodologies were selected to generate hierarchical ...

In this work the commercial zeolite NH4-ZSM5 (Zeolite Molecular Sieve of porosity-5) was calcined in air to produce the protonated zeolite H-ZSM5, the copper incorporation into H-ZSM5 was performed by ion exchange obtained ...

Composite ZSM-5/MCM-41 material has been obtained by hydrothermal synthesis of alkali-treated ZSM-5 zeolite prepared from Expanded Perlite. A two-step procedure that avoids the traditional dual template synthesis strategy ...

The present work reports the study of nanoporous structures, aiming at their use in research directed to the current demand of the petroleum industry to value heavy oil. Initially, two ways were chosen for the synthesis ...