Farid Akhtar

Abstract:

Porous adsorbents such as Zeolites, metal organic frameworks, activated carbons, and aluminum phosphates are high surface area materials with great potential for catalysis and gas separation applications. The porous adsorbents are produced in powder form and assembled into mechanically strong hierarchically porous granules, with addition of significant volume fraction of clay binders for industrially important gas separations. In this regard, recent developments on binderless processing of porous adsorbent powders will be presented to produce volumetrically efficient hierarchically porous structured adsorbents, with properties to overcome the limitations of conventional adsorbent materials specifically for decarbonization of gas streams e.g. power-plant flue gas and biogas streams. We will demonstrate that pulsed current processing (PCP) is a versatile tool to structure porous adsorbents without addition of binders in form of monoliths and laminates and outperform conventionally structured zeolites in all aspects of post-combustion decarbonization of gas streams, including CO2 uptake capacity, high CO2 over CH4 and CO2 over N2 selectivity, rapid uptake and release kinetics and mechanical stability.