Adsorptive removal of H2S in biogas conditions for high temperature fuel cell systems

作者：Sisani Elena^*; Cinti Giovanni; Discepoli Gabriele; Penchini Daniele; Desideri Umberto; Marmottini Fabio

来源：International Journal of Hydrogen Energy, 2014, 39(36): 21753-21766.

DOI：10.1016/j.ijhydene.2014.07.173

• Biogas
• Fuel cell
• Adsorption
• Activated carbon

Desulfurization represents a crucial step in fuel processing for high temperature fuel cells, because of catalysts stringent requirements. Moreover, when fuel cell stacks are used in micro-CHP applications, it is necessary to build an efficient and compact system. The use of biogas from anaerobic digestion could have a significant impact in terms of fossil fuels saving and environmental conservation. Biogas contains different impurities, among which H2S represents one of the most harmful components. %26lt;br%26gt;Adsorption tests for H2S removal were carried out in biogas conditions, using commercial adsorbents, defining the materials characterized by the best performance and resulting in a predominance of impregnated activated carbons. The influence on adsorption capacity of operating parameters, such as gas hourly space velocity, gas matrix composition (N-2, CH4 and CO2), humidity, temperature (30-150 degrees C), H2S concentration (50 -1000 ppmv) and filter geometry, was investigated. The aim of the study was the functional parameters optimization to obtain a compact filter with high removal activity.

• 出版日期2014-12-12