Showing papers by "Francisco Rodríguez-Reinoso published in 1998"
TL;DR: In this paper, the increasing importance of carbon materials in catalytic processes is analyzed in terms of the most important characteristics of these materials when acting as catalysts or catalyst supports, such as surface area, porosity, chemical inertness and oxygen surface groups.
1,620 citations
TL;DR: In this article, a simple and convenient evaluation of volume of micropores and heterogeneity of the micropore size distribution can be obtained by combining the results from adsorption of N2 at 77 K and CO2 at 273 K.
211 citations
TL;DR: In this article, two heat-treated carbon blacks, one of them subjected to an oxidizing treatment with hydrogen peroxide, have been used as supports for platinum, which has been introduced using both H 2 PtCl 6 in acid media and [Pt(NH 3 ) 4 ]Cl 2 in basic media.
Abstract: Two heat-treated carbon blacks, one of them subjected to an oxidizing treatment with hydrogen peroxide, have been used as supports for platinum, which has been introduced using both H 2 PtCl 6 in acid media and [Pt(NH 3 ) 4 ]Cl 2 in basic media. The catalysts have been characterized by H 2 chemisorption at room temperature (after different pre-treatments), temperature-programmed reduction (TPR) and temperature-programmed desorption of adsorbed hydrogen (H 2 -TPD), and their catalytic behavior in the gas-phase hydrogenation of benzene has been determined under differential conditions. TPD profiles of oxygen surface groups in fresh catalysts evidenced the support oxidation by H 2 PtCl 6 , with the occurrence of a CO evolution peak at low temperature (630 K). The presence of oxygen surface groups in the support favors the anchoring of [Pt(NH 3 ) 4 ] 2+ , but does not affect the amount of platinum retained by the support when H 2 PtCl 6 is used as metal precursor. TPR experiments have evidenced that the oxidized support hinders the reduction of the platinum precursor. The catalytic activities in the benzene hydrogenation reaction do not show a direct correlation with dispersion values obtained from hydrogen chemisorption, and it has been related to storage and mobility of hydrogen which is spilt over the support during the reduction treatments.
143 citations
TL;DR: The platinum-ceria interaction, induced after high temperature reduction of platinum based catalysts, has been used to improve the selectivity towards crotyl alcohol in the gas phase hydrogenation of crotonaldehyde as mentioned in this paper.
100 citations
TL;DR: In this article, a simulation of industrial delayed cokers is presented, where pyrolyses are carried out under pressures of up to 1.0 MPa and complete mass balances are obtained and the semicokes examined by optical microscopy.
65 citations
TL;DR: In this article, the effect of a previous oxidation treatment of the carbonaceous support on the catalytic behavior of platinum in the gas phase hydrogenation of crotonaldehyde (trans-2-butenal) over Pt/carbon black catalysts has been analyzed.
36 citations
TL;DR: In this article, the X-ray spectra scattered by olive stones and the corresponding carbonization products obtained up to 800 °C have been determined, and the observed Compton intensity is in prominence in relation to the Rayleigh intensity, as a consequence of the chemical composition of the materials, where light (low atomic number) elements predominate.
9 citations
1 citations