GAS PURIFICATION SYSTEM

摘要

Methods and apparatuses are provided for removing odorants, such as tetrahydrothiophene, and sulfur compounds, such as hydrogen sulfide, out of a gas, such as natural gas. Such systems are typically required by fuel processor systems, where the odorant and sulfur compounds might, otherwise, poison the fuel processor and fuel cell catalysts. Systems (500) of the present invention are based on the use of two filtration stages (506, 508) so that the odorant removal function is segregated from the general removal of hydrogen sulfide.