scispace - formally typeset
Search or ask a question
Author

Esther Lorente

Bio: Esther Lorente is an academic researcher from University of Zaragoza. The author has contributed to research in topics: Reaction rate & Reducing atmosphere. The author has an hindex of 1, co-authored 1 publications receiving 29 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the effect of water vapour on the kinetics of the steam-iron process was investigated and two models, the competitive model and the inhibitive model, were proposed to predict the behavior of the solid subjected to successive reductive and oxidative cycles.

35 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this paper, the anaerobic oxidation of ethanol over spinel mixed oxides was studied by means of in situ diffuse reflectance spectroscopy (DRIFTS) and mass spectrometry (MS).
Abstract: The anaerobic oxidation of ethanol over spinel mixed oxides A2+Fe23+O42– (with A = Co2+, Ni2+, or Fe2+) was studied by means of in situ diffuse reflectance spectroscopy (DRIFTS) and mass spectrometry (MS). The nature of the surface species formed during the reaction and its related gas products were discussed. Different reaction pathways were proposed depending on the catalyst composition. Acetates appeared to be important surface intermediates in the case of the Ni ferrite which is at the same time the most basic and easily reducible catalyst from the set studied, whereas with Co and Fe ferrites, more direct pathways to oxidation products were evidenced but at higher temperatures.

62 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of the temperature, syngas constituents and reduction degree on the sticking properties of iron ore pellets in the presence of H2-CO mixtures were evaluated.

52 citations

Journal ArticleDOI
TL;DR: The results indicate that iron species are embedded into the carbon matrix by lignin melting, suggesting that the representative MBAC product has a comparable phosphate adsorption capacity to most of the reported MBCs and MBACs.

45 citations

Journal ArticleDOI
TL;DR: In this article, the impact of gas phase pretreatment of a supported iron-oxide catalyst utilized in aligned carbon nanotube (CNT) growth is studied to understand the correlation between the catalyst oxidation state and the growth characteristics of the aligned CNT forests.
Abstract: The impact of gas-phase pretreatment of supported iron-oxide catalyst utilized in aligned carbon nanotube (CNT) growth is studied to understand the correlation between the catalyst oxidation state and the growth characteristics of the aligned CNT forests. By varying the pretreatment conditions from a reducing to an oxidizing environment, notable changes are observed in both the collective CNT array growth behavior and the individual CNT characteristics. Although the greatest catalytic activity was observed following a full reduction to the zerovalent (metallic) Fe catalyst, growth is also observed from a catalyst composed of both Fe2O3 and Fe3O4 particles. XPS core-level analysis, following pretreatment of the catalyst, emphasizes the critical nature of the combined catalyst–underlayer interaction to achieve optimal catalyst activity during growth and hence the most efficient catalyst reduction process. Additionally, CNT diameters during growth were strongly affected by the pretreatment process. Overall, ...

39 citations