Adsorption for efficient low carbon hydrogen production: part 2—Cyclic experiments and model predictions

Abstract Hydrogen as clean energy carrier is expected to play a key role in future low-carbon systems. In this paper, we demonstrate new technology for coupling fossil-fuel based hydrogen production with carbon capture and storage (CCS): the integration of CO 2 H purification single vacuum pressure swing adsorption (VPSA) cycle. An eight step VPSA cycle tested two-column lab-pilot ternary –H –CH 4 stream representative shifted steam methane reformer (SMR) syngas, while using commercial zeolite 13X adsorbent. The can co-purify , thus reaching purities up 99.96%, 98.9%, recoveries 94.3% 81%. decision variables adjusting separation performance reach required targets are heavy purge (HP) duration, feed evacuation flow rate light (LP). contrast that, rather insensitive towards small changes composition HP inlet composition. Comparing experimental results simulation shows that model describing multi-component critical determining predictive capabilities column model. Here, real adsorbed solution theory (RAST) necessary describe all experiments well, whereas neither extended isotherms nor ideal (IAST) reproduce effects observed experimentally.