Compression hydrogen

These compressors are free from leakage to the same extent as are static seal systems. The leak-free integrity of the system is maintained even in the event of a diaphragm or diaphragm seal failure. 

Post-Oil Energy Technology After the Age of Fossil Fuels 

Process contacting parts are machined from corrosion-resistant metals for long life. 

Triple diaphragm construction ensures noncontaminating compression and allows rapid detection of diaphragm and diaphragm seal leakage. S j —y 

Cavity contours are precision machined and inspected to 0.0001 in.(0.002Snun) to ensure optimum diaphragm life. 

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A fuel cell system for automobile application is shown in Figure 1.5 [41]. At the rated power, the PEMFC stack operates at 2.5 atm. and 80°C to yield an overall system efficiency of 50% (based on lower heating value of hydrogen). Compressed hydrogen and air are humidified to 90% relative humidity at the stack temperature using process water and heat from the stack coolant. A lower system pressure is at part load and is determined by the operating map of the compressor-expander module. Process water is recovered from spent air in an inertial separator just downstream of the stack in a condenser and a demister at the turbine exhaust. 

Hydrogen compression. Compression of natural gas is a well-established technology. Utilizing natural gas compression technologies for hydrogen is unreliable because... 

It is noted that all the candidate compressors mentioned earlier are costly in capital, energy, and operations and maintenance (O M). Advances have centered on the optimization of subsystems for cost reduction and improvement of the energy efficiency of gaseous hydrogen compression. Centrifugal compression and electrochemical hydrogen... 

Table 12.5. Electric power consumption for hydrogen compression at the filling station at a suction pressure of 2.0MPa.

Fig. 5.9 Thermal hydrogen compression with a two-step process...

Z. Dehouche, M. Savard, F. Laurencelle, J. Goyette, Ti-V-Mn based alloys for hydrogen compression system, J. Alloys Compd. 400 (2005) 276-280. 

Heat exchangers are employed to cool the reactor effluent and the desulfurized liquid product is separated from the recycle gas at a pressure somewhat lower than that of the reactor section. Hydrogen sulfide and any light hydrocarbon gases are removed from the recycle gas which is then mixed with fresh (makeup) hydrogen, compressed, and mixed with further hydrocarbon feedstock. 

Hydrogen and oxygen are released separately and the gases are manifolded from the cell batteries into separators, where water vapor and excess electrolyte are removed. The system costs included feedwater treatment and hydrogen compression to 400 psi. 

Hydrogen compression energy is estimated with the adiabatic compression energy formula ... 

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