Desulphurization represents a crucial step in fuel processing for high temperature fuel cell applications, because of the stringent requirements of fuel cell catalysts. Moreover, when fuel cell stacks are used in a micro-CHP system, the necessity to realize an efficient and compact system is mandatory. The possibility to use a renewable energy source, as biogas from anaerobic digestion instead of natural gas, to feed a fuel cell stack, could have a significant impact in terms of fossil fuels saving and environmental conservation. In this work, desulphurization tests for H2S removal are carried out in biogas conditions, using commercial adsorbents, like activated carbons (AC), activated alumina, zeolite and sepiolite. The first part of the test campaign was focused on the definition of the material characterized by the best performance in terms of H2S adsorption capacity. Then, the influence on adsorption capacity of operating parameters, such as gas hourly space velocity (GHSV), humidity (Relative Humidity 50%) and gas matrix composition (N2, CH4, CO2 and a mixture of CH4 and CO2) was investigated, in order to obtain a compact filter with high removal activity.
ADSORPTIVE REMOVAL OF H2S IN BIOGAS CONDITIONS FOR HIGH TEMPERATURE FUEL CELL SYSTEMS
DESIDERI, UMBERTO
2013-01-01
Abstract
Desulphurization represents a crucial step in fuel processing for high temperature fuel cell applications, because of the stringent requirements of fuel cell catalysts. Moreover, when fuel cell stacks are used in a micro-CHP system, the necessity to realize an efficient and compact system is mandatory. The possibility to use a renewable energy source, as biogas from anaerobic digestion instead of natural gas, to feed a fuel cell stack, could have a significant impact in terms of fossil fuels saving and environmental conservation. In this work, desulphurization tests for H2S removal are carried out in biogas conditions, using commercial adsorbents, like activated carbons (AC), activated alumina, zeolite and sepiolite. The first part of the test campaign was focused on the definition of the material characterized by the best performance in terms of H2S adsorption capacity. Then, the influence on adsorption capacity of operating parameters, such as gas hourly space velocity (GHSV), humidity (Relative Humidity 50%) and gas matrix composition (N2, CH4, CO2 and a mixture of CH4 and CO2) was investigated, in order to obtain a compact filter with high removal activity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
