We investigate the use of a series iron-based metal–organic frameworks as precursors for manufacturing isobutane dehydrogenation catalysts. Both as-prepared and spent catalysts were characterized by PXRD, XPS, PDF, ICP-OES, CHNS+O to determine physicochemical properties materials active phases responsible catalytic activity. In contrast previous literature, our results indicate that (i) formati...

A set of Y-type zeolites with Si/Al atomic ratios between 7–45 were studied as catalysts in the aminocyclization reaction acrolein and ammonia to produce pyridine 3-picoline. The catalytic activity tests at 360 °C revealed that conversion increased order Z45 < ZY34 ZY7 ZY17, agreement increase total acidity per gram catalyst. In all cases, bases cracking products (acetaldehyde formaldehyde) ...

Platinum group metals, such as Pd and Pt, found in three-way catalyst converters were recycled a two-step method: hydrodynamic cavitation followed by sonoelectrochemical dissolution. High shear forces obtained using convergent nozzle with throat diameter of 0.2 mm, feeded plunger pump at pressure 60 MPa. Cavitating submerged jets acted locally on the water dispersed waste catalyst. As-obtained ...

Reduction of fossil fuels sources, increasing of pollution gases emission, and global warming effects increase the demand of renewable fuels. One of the main candidates of alternative fuels is biodiesel. Biodiesel limits greenhouse gas effects due to the closed CO2 cycle. Biodiesel has more biodegradability, lower combustion emissions such as CO, SOx, HC, PM and lower toxicity than petro diesel...

eethylene polymerization catalysts became available in an enormous variety. the challenge in this research is to find catalysts that are able to connect ethylene molecules in such a way that not only linear chains are produced but variations like branched materials that possess very interesting mechanical properties like linear low density polyethylene (lldpe). in this contribution, three diffe...

Hydrogen production via steam reforming of biomass derived oxygenates is a promising environmental alternative to the use fossil fuels. The ethanol reaction investigated over Ni and Rh based catalysts supported on ZrO2-La2O3 CeO2-ZrO2-La2O3 mixed oxides, aiming at elucidation role metal support in mechanism. versus shown be highly active more selective with no methane under all conditions studi...

preparation of 2-chlorobenzonitrile, and benzonitrile are reported here from the corresponding 2-chlorobenzaldehyde and benzaldehyde by the reaction of ammonium hydroxide/vpo titania, vpo bulk (ammonium metavanadate) cucr catalyst/air system in methanol. all these catalysts showed better conversions with reasonable selectivity to aromatic. the results prove that bet surface area results show vp...

in ziegler-natta olefin polymerization, the pore architecture of catalysts plays a crucial role in catalyticperformances and polymer properties. while the type of preparation routes (such as chemical reaction andsolution precipitation) greatly affects the catalyst pore architecture as a result of different solidification mechanisms,the modification of the pore architecture within a given route ...