Experimental demonstration of the Ca-Cu looping process

In this work an experimental proof-of-concept of the Ca-Cu process has been carried out. The combines sorption-enhanced steam reforming methane with a Ca-based sorbent chemical looping Cu-based oxygen carrier to provide energy for regeneration. Each step studied separately different operating pressures and inlet gas compositions, addition complete cycles (including all three consecutive steps, viz. step, oxidation regeneration step) have performed evaluate technical feasibility process. pressure influences negatively, while steam-to-carbon ratio does not influence average outlet H2 (dry) fraction. When increasing O2 concentration during amount CO2 released increases, whereas decreases released. fraction in feed increases that is regenerated, reaching 70 wt% bed 60 vol% feed. More than 285 were performed, solids still chemically performing well, results reproducible. Simulations pseudo-homogeneous reactor model separate steps. describe data which was attributed problems packing at bottom (solids maldistribution), confirmed after opening campaign. caused by chemical–mechanical stability carrier, became powder experiments due high mechanical stresses it exposed to.