**Abstract**

It has been widely reckoned the potential of developing novel CO2 capture technologies aiming at low-energy penalties and reduced cost as a solution for fighting against climate change. The Ca-Cu chemical looping process emerged as a promising technology for producing hydrogen and/or power with inherently low CO2 emissions. The core of this concept is the calcination of the CaCO3 by coupling in the same solid bed the exothermic reduction of a CuO-based material, improving the efficiency of the CO2 sorbent regeneration step. Significant progress has been made since its first description in 2009, fulfilling the validation of the key stage under relevant conditions for the process in 2016. This chapter compiles the main advances in the Ca-Cu process regarding material development, reactor and process design and lab-scale testing, as well as in process simulation at large scale.

**Keywords:** CO2 capture, sorption-enhanced reforming, calcium looping, chemical looping
