Previous experimental studies have shown that addition of small amounts of oxygen to a hydrocarbon fuel stream can control coking in the anode, while relatively large amounts of oxygen are present in the fuel stream in single-chamber solid oxide fuel cells SOFCs . In order to rationally design an anode for such use, it is important to understand the coupled catalytic oxidation/ reforming chemis...

The application of a self-organizing fuzzy proportional–integral–derivative (SOF-PID) controller to a multiple-input–multiple-output (MIMO) nonlinear revolute-joint robot arm is studied in this paper. The SOF controller is a learning supervisory controller, making small changes to the values of the PID gains while the system is in operation. In effect, the SOF controller replaces an experienced...

After long and successful development history of Solid Oxide Cells (SOC) continuous improvement in performance, longevity, manufacturing, system integration it is necessary to bring this highly efficient technology the market. The activities on material optimization at IKTS are focused mainly enhancement durability for SOFC, SOEC, rSOC operation boosting power density. During recent years consi...

Fuel cells are treated as flow engines driven by fluxes of chemical reagents and electrochemical mechanism of electric current generation. Analyzed are performance curves of a SOFC system, power limits and the effect of typical design and operating parameters on the cell performance. The theory combines a recent formalism worked out for chemical machines with the Faraday’s law which determines ...

A novel, integral, tri-layered, proton conducting membrane SOFC was readily fabricated for simultaneous conversion of ethane at 650-700 degrees C to electrical power and ethylene with high selectivity.

a r t i c l e i n f o Using first-principles calculations, we have carried out a systematic comparative study of the microscopic atomic defect configurations in cubic and tetragonal yttria-stabilized zirconia (YSZ) and their correlation with the macroscopic lattice parameters and relative phase stability, as a function of Y concentration. We found that Y atoms sit at the second-nearest-neighbor...

Increasing efficiency and decreasing cost are the main purposes in the design of the power generation systems. In this study two hybrid systems: solid oxide fuel cell (SOFC)-gas turbine (GT) and SOFC-GT-steam turbine (ST); are considered. Increasing the SOFC input temperature causes thermodynamics improvement in the hybrid system operation. For this purpose, using two set of SOFC reactants heat...