Based on chemical looping combustion

a system for hydrogen production from sorption-enhanced coke-oven gas steam reforming is presented.The system includes three reactors

namely sorption-enhanced coke-oven gas steam reforming reactor (SECOGSR)

fuel reactor and air reactor.The system realizes direct production of high-purity hydrogen (93.23%) with inherent CO2 capture.Aspen Plus was used to simulate the sorption-enhanced coke-oven gas steam reforming process and the whole system.The optimized operating conditions

such as temperature

pressure

calcium to carbon ratio

and steam to carbon ratio of the SECOGSR were 650℃

1.5 MPa

1 and 4

respectively.In order to achieve the heat balance of the whole system with no additional heat supply

1 mol input of coke-oven gas of SECOGSR consumed 0.139 mol coke-oven gas

0.648 mol air in the fuel reactor and 3.11 mol oxygen carrier in the air reactor

which was composed of NiO

Y2O3 and ZrO2 with the ratio of 0.73/0.022/0.248 (mol).1 mol coke-oven gas generates 1.30 mol hydrogen and 0.355 mol pure CO2 without additional separation process in the system.