“…Pd-based membrane reformers have been mainly studied to improve the performance of the membrane and their yields ranged from 0.01 to 214 kg per day. 45,48,51,69,75 Notably, microstructured reformers have been used in processes with lower productivity of 11 kg per day or less. 56,72,74 In addition, various reformer types have been developed to reduce the size of the reactor, including heat-exchangertype reformers 44,64,76 and cylindrical reformers 49,50,60 For the removal of CO 2 , sorption-enhanced SMR technology has also been developed for small-scale hydrogen production and its production capacities are 0.1 and 3 kg per day.…”