On average Detroit's firefighters, police officers and other city employees receive pension checks that are similar or slightly smaller in size than the national average of $30,000 a year, according to pension experts.
Steam-Methane Reforming. Most hydrogen produced today in the United States is made via steam-methane reforming, a mature production process in which high-temperature steam (700Â°Câ1,000Â°C) is used to produce hydrogen from a methane source, such as natural gas.
Because the pressure drops in the throttling device and the feed is a superheated vapor, the effluent must also be a superheated vapor. So, to answer part (a), we must use the Superheated Steam Tables to determine the temperature of 400 kPa steam that has a specific enthalpy equal to H2.