1,721,053 research outputs found
Dry reforming of CH4 with Ni and Rh metal catalysts supported on SiO2 and La2O3
No full textThe catalytic activities of Rh and Ni metals supported on SiO2 or La2O3 were compared at CH4+CO2 reforming conditions and performing catalytic tests and thermal analyses in thermodynamic conditions favourable for carbon deposition. The deactivation of both the metals deeply depend on the support. An increased CO production is obtained with lanthana but the comparison between Rh and Ni on carbon deposition base suggests that a positive effect could be reached only at low methanation activity
Pilot plant tests for glyoxal production: Reactor thermal behavior
No full textTest data for catalytic oxidation of ethylene glycol to glyoxal performed with a laboratory continuous flow tubular reactor and successively with a pilot plant scale apparatus are reported using a Cu, Ag, P catalyst (94.5%, 4.5% and 1%, respectively). Reaction parameters (O2 concentration, temperature, space velocity) deeply affect the reactor thermal behavior. Relevant features of the complex reaction path can be hypothesized together to useful information on designing the reactor
Microencapsulation of menadione sodium bisulphite with polydimethylsiloxane by the spray-drying process: characterization by thermal analysis
No full textMenadione sodium bisulphite was microencapsulated with a polydimethylsiloxane membrane using spray-drying technology. Tests were performed using laboratory equipment and a Niro Atomizer pilot plant to scale up the process. The products were characterized with differential thermal analysis (DTA) and chemical and physical methods. Many differences between raw material and microencapsulated powder result from DTA data. The thermal characterization confirms that the spray-drying microcoating could be used to protect powder from the oxidative actions of the atmosphere
Use of ozonized oxygen in heterogeneous catalysis. Effect on the apparent activation energy
No full textThe catalytic oxidation of lower olefins has been studied. The effect of ozonized oxygen has been examined. The results show that the apparent activation energy decreases. The industrial importance of the phenomenon is pointed out
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