Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
This is the first time that the thermochemical recycling of rubber from old tyres by pyrolysis and the emissions from combustion of the gas obtained in the pyrolytic process have been studied. In tyre pyrolysis, compounds in three phases... more
This is the first time that the thermochemical recycling of rubber from old tyres by pyrolysis and the emissions from combustion of the gas obtained in the pyrolytic process have been studied. In tyre pyrolysis, compounds in three phases are obtained: solid, liquid and gas. The solid compounds, approximately 40% weight of the initial rubber, are mostly constituted of carbon
Research Interests:
Research Interests:
Research Interests:
Scrap tyres are a growing environmental problem because they are not biodegradable and their components cannot readily be recovered. In this investigation, the thermochemical recycling of rubber from old tyres by pyrolysis and the value... more
Scrap tyres are a growing environmental problem because they are not biodegradable and their components cannot readily be recovered. In this investigation, the thermochemical recycling of rubber from old tyres by pyrolysis and the value of the products obtained have been studied. First, thermobalance experiments were carried out, studying the influence of the following variables: heating rate, flow rate, particle size and temperature. These thermobalance results were extended by performing experiments in a fixed bed reactor, studying the effect of the main process variables on yields of derived products: oils, gases and solid residue. The oils have been characterized using a combination of analytical techniques (TLC–FID, GC–MS and simulated distillation). No relationship between functional group composition of the oils determined by TLC–FID and process variables was found. The carbonaceous material obtained was characterized by N2 and CO2 adsorption. The possible uses of this char have been analyzed taking into account and calculating the emissions that would be produced if the char were burnt.
Research Interests:
Research Interests:
Research Interests: Chemical Engineering, Materials Science, Chemistry, Mass Transfer, Kinetics, and 13 morePyrolysis, Activated Carbon, Activation Energy, Optimal Reactive Power System, Surface Area, Thermogravimetric Analysis, Reaction Rate, Carbon Black, Carbon Fibers, Pyrolytic Carbon (Pyrocarbon), Experimental Data, Kinetic Parameter, and Mesoporous Material
Research Interests:
Research Interests:
Research Interests:
Research Interests:
ABSTRACT Mesoporous CeO2 modified by the addition of copper has shown high efficiency for the total oxidation of naphthalene. High activity and 100% selectivity to carbon dioxide throughout the whole range of temperatures studied were... more
ABSTRACT Mesoporous CeO2 modified by the addition of copper has shown high efficiency for the total oxidation of naphthalene. High activity and 100% selectivity to carbon dioxide throughout the whole range of temperatures studied were achieved for copper loadings of 3.6% and lower. The catalytic behaviour has been related to the concentration of surface oxygen defects. A clear correlation between the concentration of surface oxygen defects (determined by XPS and DRIFTS) and the catalytic performance has been identified. Catalytic activity increased as copper was incorporated into the ceria up to 3.6%. In this range of copper content the copper was incorporated into the cubic fluorite lattice of CeO2 and this was confirmed using XRD and electron diffraction studies. For copper ceria catalysts with higher copper contents the concentration of oxygen defects decreased and an additional dispersed monoclinic CuO phase with a low intrinsic activity was formed, thus leading to a decrease of both the activity and the selectivity to CO2.
Research Interests:
... Spain. b Department of Applied Physics and Electromagnetism, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Valencia, Spain. c SCSIE, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Valencia, Spain. d ...
Research Interests:
In this study, an investigation about the thermal behavior of four different woods was carried out. The distributed activation energy model was applied to study the effect of heating rate on the reaction of single solids. Results obtained... more
In this study, an investigation about the thermal behavior of four different woods was carried out. The distributed activation energy model was applied to study the effect of heating rate on the reaction of single solids. Results obtained were used in the curve prediction of fraction of mass remaining and rate of mass loss vs. temperature at more realistic heating rates. The possible calculation of biomass samples behavior in pyrolysis conditions as the summation of their constituents, lignin, cellulose, and hemi‐cellulose is also explored. All the samples show a weak interaction between the constituents which produce slight differences between experimental and calculated behavior. However, differences between experimental and calculated data lower than 2% offer a robust test of the applicability of the model on kinetic studies of a wide range of biomass samples, heating rates, data input format and equipment layout. © 2009 American Institute of Chemical Engineers AIChE J, 2009
Research Interests:
During the catalytic combustion of naphthalene, compounds other than CO(2) are often obtained. These products, as polymerized polycyclic aromatic hydrocarbons, oxygenated aromatic compounds and benzene derivate compounds, are usually more... more
During the catalytic combustion of naphthalene, compounds other than CO(2) are often obtained. These products, as polymerized polycyclic aromatic hydrocarbons, oxygenated aromatic compounds and benzene derivate compounds, are usually more toxic than naphthalene. At the present work it is shown a nanocrystalline cerium oxide prepared by a combustion method employing a proper ethylene glycol concentration that exhibits very high activity in the decomposition of naphthalene in the presence of air and, most importantly, a selectivity value towards CO(2) of 100% for any range of conversions and/or temperatures used. In addition, it has been demonstrated that the amount of ethylene glycol employed in the synthesis of the catalyst is determinant to achieve the optimal catalytic performance. The catalytic results have been explained in terms of the amount of cerium oxide defects.