Abstract
The performance of multi-stage circulating fast fluidized bed membrane reformers (CFFBMRs) for production of ultraclean hydrogen is investigated in comparison to a single circulating fast fluidized bed membrane reformer (CFFBMR). The two-stage reformer configuration gives significant increase in the methane conversion of 27.46% and ultraclean hydrogen yield of 29.61% compared to the single CFFBMR. The concept of the multi-stage short reformers policy is introduced. Impressively, substantial increase of ultraclean hydrogen yield of 83.91% is achieved.