Flow rate fuel cell reactor

The reactor was tested using a range of methanol and water concentrations, and researchers found the best results using a water and methanol mixture with a steam-to-carbon ratio (S C) of 1.1 1. They were able to achieve 90% conversion at 260 °C with a reactant liquid flow rate of 12 cmYh. Assuming a fuel cell efficiency of 60% and 80% hydrogen utilization, they estimated the output power to be 15 W. Eventually the complete system will include a cata-... 

There are numerous applications that depend on chemically reacting flow in a channel, many of which can be represented accurately using boundary-layer approximations. One important set of applications is chemical vapor deposition in a channel reactor (e.g., Figs. 1.5, 5.1, or 5.6), where both gas-phase and surface chemistry are usually important. Fuel cells often have channels that distribute the fuel and air to the electrochemically active surfaces (e.g., Fig. 1.6). While the flow rates and channel dimensions may be sufficiently small to justify plug-flow models, large systems may require boundary-layer models to represent spatial variations across the channel width. A great variety of catalyst systems use... 

Fig. 4 C2 selectivity and CH4 conversion as a function of oxygen flow rate in the fuel cell and in the conventional reactor (T=730 C, anode Q=100ml/min, Pch4=20.3kPa, cathode Q=250ml/min,Po2=20.3kPa)...

In part of a sulfuric acid plant, a stream of pure SO2 at 2 bar and 600 K flowing at a rate of 100 mol/s is mixed with a pure oxygen stream at 293 K, 1 bar, and a flow rate of 50 mol/s and reacted to form SO3. The stream exiting that part of the plant is in chemical equilibrium at 1 bar and 293 K. Joe Udel is interested in improving the energy efficiency of this part of the process and suggests that instead a new type of work-producing reactor (i.e., a fuel cell) be installed that would accept the two pure streams, and work would be extracted. What is the maximum rate at which work could be obtained from this process if such a reactor could be developed ... 

An example of an experiment with a 2 factorial design is the analysis of the CO concentration after a water gas shift (WGS) reactor in a fuel cell system operating with reformate. In the example, the factors were selected as the inlet temperature of the shift reactor and the flow rate of quench water fed between the high- and low-temperature shift stages. The response of these values to the CO concentration as the target parameter was analyzed. In order to simplify the discussion, the values at the lower and upper levels were standardized as —1 and +1, respectively. The response functions were derived using the standardized values for each factor. 

Fuel reforming system that requires a fuel reformer, chemical reactors, heat exchangers, fans/blowers, burner, etc. Fuel flow rate to the fuel cell could use an ejector system to eliminate the fan for the fuel flow to the stack. 

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