Jerónimo Juan-Juan- PhD
- University of Alicante
Jerónimo Juan-Juan
- PhD
- University of Alicante
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27
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Introduction
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Publications
Publications (27)
The preferential CO oxidation (CO-PROX) reaction is paramount for the purification of reformate H2-rich streams, where CuO/CeO2 catalysts show promising opportunities. This work sheds light on the lattice oxygen recovery mechanism on CuO/CeO2 catalysts during CO-PROX reaction, which is critical to guarantee both good activity and selectivity, but t...
An efficient gas-phase production of propylene oxide (PO) with noble metal-free catalysts could modify the industrial output of this valuable compound. We present a novel catalyst based on well-dispersed Ni nanoparticles loaded on a Ti-SiO2 support for the propylene epoxidation reaction using H2/O2 mixtures. XPS, High Resolution Transmission Electr...
Nominally different Cu contents have been loaded on synthetic Cryptomelane oxide and the resulting CuO/Cryptomelane catalysts have been tested in the CO-PROX reaction. Catalytic activity was assessed in terms of the tunable synergistic interaction between copper and cryptomelane. This work entails the use of conventional characterization techniques...
The adsorption of p-nitroaniline (PNA)on Pt nanoparticles, both in the absence (in aqueous solution)and in the presence of oxygen (in air environment), is studied by SERS for the first time. Differences between the plasmon-driven catalysis of adsorbed PNA on Pt and Ag nanoparticles have been found. In the presence of oxygen, the oxidative coupling...
This article presents the second study of ochres associated with the Lower Magdalenian (18.7 cal kya) “Red
Lady” human burial in El Mirón Cave (Cantabria, Spain). In the first study (Seva Román et al., 2015), we
determined that the burial deposit contained iron oxides and idiomorphic hematite that were not from sources
near the site, but possibly f...
It is demonstrated that the synthesis procedure for preparing three-dimensionally ordered macroporous (3DOM) Pr-doped ceria catalysts using a polymethylmethacrylate (PMMA) template not only affects the porous structure, but also the chemistry of the ceria surface. The PMMA template does not affect the crystalline features (type of phases, crystalli...
Well dispersed iron catalysts were synthesized in silica (Fe0.0XSiO2) by a one-step synthesis procedure. These materials were tested in the propylene epoxidation reaction with gaseous O2. The influence of the iron metal loading on the iron incorporation and distribution in the support (both influenced by the synthetic procedure) were thoroughly stu...
Partiendo del análisis instrumental de cuatro pequeños fragmentos constructivos se intenta, en lo posible,contestar a una serie de cuestiones básicas señaladas por algunos autores (De Chazelles y Poupet, 1989: 10-11; Sánchez García, 1995: 350; 1997: 142) para poder comprender el nivel técnico de una época o cultura y la evolución de sus técnicas co...
Se analizan varios fragmentos constructivos de barro del yacimiento neolítico de Galanet (Elche, España) mediante diferentes técnicas analíticas (FRX, DRX, FTIR-ATR, TG-MS, SEM-EDX)
Análisis mediante diferentes técnicas instrumentales (ATR-IR, TG, MO, SEM, DRX, FRX, etc..) de un fragmento constructivhttp://hdl.handle.net/10045/20421o procedente de un yacimiento Neolítico-Mesolítico de Cantera Benàmer (Muro d'Alcoi, Alicante).
This paper reports comparatively the capacities of two activated carbons (ACs) and MOF-5 for storing gases. It analyzes, using similar equipments and experimental procedures, the density used to convert gravimetric data to volumetric ones, measuring the density (tap and packing at different pressures). It presents data on porosity, surface area and...
Se han aplicado técnicas de análisis instrumental (FRX, DRX, ATR-IR, TG-ATD, SEM-EDX, MO) al estudio de fragmentos constructivos de época neolítica obtenidos de diferentes yacimientos de la Provincia de Alicante (España). La secuencia y el orden de aplicación de las técnicas se fija en función de las características y la cantidad disponible de cada...
En este trabajo se ponen de manifiesto las ventajas de la utilización de la Termogravimetría acoplada a Espectrometría de masas (TG-EM) y de la Espectrometría Infrarroja mediante Reflectancia Total atenuada (ATR-FTIR) frente a las técnicas usadas tradicionalmente de Termogravimetría (TG) y de Espectroscopia Infrarroja por Transformada de Fourier en...
Análisis mediante diferentes técnicas instrumentales (ATR-IR, TG, MO, SEM, DRX, FRX, etc..) de un fragmento constructivo procedente de un yacimiento Neolítico-Mesolítico de Cantera Benàmer (Muro d'Alcoi, Alicante).
The deep gas-phase hydrodechlorination (HDC) of dichloromethane (DCM) was studied over several laboratory-made activated carbon-supported metallic catalysts (Pd/C, Pt/C, Ru/C and Rh/C) at atmospheric pressure, reaction temperatures in the 200–250 °C range and space-times of 0.08 and 1.7 kg h mol−1. All the catalysts showed a high activity in HDC of...
A hydrogen storage study, on gravimetric and volumetric bases, has been carried out on three adsorbents having similar adsorption capacities: two activated carbons and a metal organic framework (MOF-5). These three samples have similar hydrogen storage on a gravimetric basis. However, expressed on a volumetric basis, both AC have higher hydrogen st...
Alumina supported Ni, Co and bimetallic Ni–Co catalysts (with 9 wt.% nominal metal content) have been prepared, characterized and tested for the dry reforming of methane. For catalysts characterization the following techniques have been used: Atomic Absorption Spectroscopy (ICP-AES), Transmission Electron Microscopy (TEM), Temperature Programmed Re...
A Ni/Al2O3 catalyst has been submitted to different treatments prior to catalytic test in the dry reforming of methane. The performed pretreatments are: (i) calcination+hydrogen reduction, (ii) direct hydrogen reduction and (iii) heat treatment up to the reaction temperature under inert atmosphere. The activity is not affected by the pretreatment c...
In this paper the effect of the potassium content in the structure and properties of the Ni active phase and in the activity and selectivity of the NiK/Al2O3 catalysts for dry reforming of methane has been studied. The following characterization techniques were used: SEM, TEM, temperature programmed reduction (TPR-H2) and reaction (TPR-CH4), temper...
The chemical activation of anthracites with hydroxides has been shown to be of interest for the production of activated carbons with a highly microporous structure. In a previous paper, attention was placed on the reactions occurring during the chemical activation of an anthracite by NaOH and KOH. In the present work, the process of chemical activa...
The effect of potassium in the catalytic activity and structural properties of a Ni/Al2O3 catalyst used for the CO2 reforming of methane has been analyzed. To determine the catalytic activity, two types of catalytic test were carried out: (i) temperature programmed reaction (TPR) up to 1173 K and (ii) isothermal reaction (IR) at 973 K. Several tech...
Introduction In the last decades, there has been an increasing interest to develop gas storage systems for different applications such as H 2 storage for automotive applications or carbon dioxide due to concerns over greenhouse gas emissions. One of the technologies that have been proposed is the application of porous materials having high adsorpti...
