Sulfur compounds present as odorants in natural gas like thiophenes,mercaptans,and sulifdes, cuase severe poisoning on high tempreature fuel cell catalysts evev at very low concentration, below 1 ppm. Therefore a deep sulpfur removal from inlet gas mixture is strongly needed and it has to be coupled with an accurate determination of sulfur concentration in the gas stream. Among the different developed filtering solutions, adsorption using porous materials represents a very attractive option, mainly in view of systems simplicity and costs. In this work, adsorptive removal of organic and inorganic sulfur compounds was carried out ina fixed bed floew reactor, using different types of porous materials, such as virgin and impgregnated activated carbons and zeolites. The purpose was to evaluate sorbet capacity of singulkra adsorbents varying process paramaters such as space velocity. The sorbents display differences in adsorpitve capacity among the individual sulfur compounds in natural gas: a comparison among odorants and H2S adsorption is in particular shown. A composite sorbent was realized and tested in order to exploit the selectivity of singular adsorbent materials.
Sulphur compounds removal from natural gas using porous materials for high temprature fuel cell applications
DESIDERI, UMBERTO
2011-01-01
Abstract
Sulfur compounds present as odorants in natural gas like thiophenes,mercaptans,and sulifdes, cuase severe poisoning on high tempreature fuel cell catalysts evev at very low concentration, below 1 ppm. Therefore a deep sulpfur removal from inlet gas mixture is strongly needed and it has to be coupled with an accurate determination of sulfur concentration in the gas stream. Among the different developed filtering solutions, adsorption using porous materials represents a very attractive option, mainly in view of systems simplicity and costs. In this work, adsorptive removal of organic and inorganic sulfur compounds was carried out ina fixed bed floew reactor, using different types of porous materials, such as virgin and impgregnated activated carbons and zeolites. The purpose was to evaluate sorbet capacity of singulkra adsorbents varying process paramaters such as space velocity. The sorbents display differences in adsorpitve capacity among the individual sulfur compounds in natural gas: a comparison among odorants and H2S adsorption is in particular shown. A composite sorbent was realized and tested in order to exploit the selectivity of singular adsorbent materials.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
