Time filter

Source Type

Sanchez-Dirzo R.,National Autonomous University of Mexico | Gonzalez-Huerta R.G.,Laboratorio Of Foto Electrocatalisis | Mendoza E.,National Autonomous University of Mexico | Silva R.,National Autonomous University of Mexico | Sandoval Pineda J.M.,ESIME IPN UA
International Journal of Hydrogen Energy | Year: 2014

One of the main challenges that our society must overcome in this century is that of finding alternative energy sources to fossil fuels. These, ideally, must be inexpensive, less polluting than current fuels and available for a substantial time. One promising alternative is hydrogen, which has the great advantage that it can be produced by coupling renewable energy devices with water electrolysis. Several projects devoted to connecting photovoltaic and wind systems with electrolysis devices have been successful; however, little research has been done into the coupling of ocean wave energy converters with water electrolysis. The work here proposes a basic system that stores the energy from waves in the form of hydrogen. The WEC considered is a novel design known as a Blow-Jet, which captures waves and converts them into a water jet. The performance of the Blow-Jet is found to depend more on wavelength than on wave height. The electrolyser results show, at 0.200 A and 1.88 V, that the electrolysis of water produces 0.082 Nl h-1 of hydrogen and a current efficiency (ηI) of 90.58%. © 2014 Hydrogen Energy Publications, LLC.

Vazquez-Larios A.L.,Energy and Environmental Research Center | Solorza-Feria O.,CINVESTAV | De Gonzalez-Huerta R.G.,Laboratorio Of Foto Electrocatalisis | Ponce-Noyola M.T.,Energy and Environmental Research Center | And 3 more authors.
Journal of New Materials for Electrochemical Systems | Year: 2013

The objectives of this work were to evaluate (i) the application of a bimetallic chalcogenide, RuxMoySez, as an oxygen reduction reaction (ORR) catalyst and (ii) the effect of the type of two anodic materials on the performance of two microbial fuel cells (MFCs). A single chamber MFC-T was built with a plexiglass cylinder, the two extreme circular faces were fitted with PEM-cathode assemblage, i.e., left and right faces. The anode consisted of 65 small triangular pieces of graphite filling the anodic chamber. A second MFC-C had a 'sandwich' arrangement anode-PEM-cathode. The cathodes were made of flexible carbon-cloth containing catalysts loading of 1mg/cm2 RuxMoySez or 0.5mg/cm 2 Pt. Power derived by cell T with cathode chalcogenide catalyst was 43% inferior to that of a similar cell with Pt although the cost of the first catalyst is significantly lower than that of Pt, i.e., 73% lower. Finally, application of graphite anode made of small triangular pieces significantly improved the performance of a MFC-T that used RuxMo ySez as a cathodic catalyst for ORR. © J. New Mat. Electrochem. Systems.

Rico M.,National Polytechnic Institute of Mexico | Sandoval J.M.,National Polytechnic Institute of Mexico | Flores L.A.,National Polytechnic Institute of Mexico | Munoz N.,National Polytechnic Institute of Mexico | And 2 more authors.
Materials Research Society Symposium Proceedings | Year: 2015

This paper shows the technological development for manufacturing corner angle sections or cardboard. Its manufacture involves splicing sheets (liners) of different weight Kraft papers joined with white glue. The thickness and strength of each profile is determined by the amount of spliced leaves and paperweight. There are two types of finishing in the profile, which are: natural finish Kraft wrapping paper and the white paper envelope. The second one is used to print images or logos on the exterior face for advertising purposes. They can withstand bending stresses for supporting buckling in horizontal and vertical position. These profiles are mainly used for packaging, protect corners, transportation and storage. A machine for manufacturing specialized linear process to obtain the required thickness is used. In this article, the basic load of an angular profile is analyzed by the fmite element method using ANSYS 14 ®. Mechanical design considerations based on the mechanics of composite materials and the theory of laminated beams are considered. With the results of this analysis, load capacities like bending, buckling and deformation profiles are obtained. Furthennore, a comparison of three thicknesses of angular profiles supporting the mentioned loads is also presented. © 2015 Materials Research Society.

Loading Laboratorio Of Foto Electrocatalisis collaborators
Loading Laboratorio Of Foto Electrocatalisis collaborators