Volume 6: Innovative Solutions for Energy Transitions: Part V

Solar Syngas Production via Chemical-Looping Cycle from Redox Cycling Of Nio in A Honeycomb Reactor Xiangyu Liu, Hao Zhang, Hui Hong* , Hongguang Jin

Abstract

Solar energy driven hydrogen production has gradually become a hotspot in the study of solar energy utilization. Chemical-looping cycle provide a possibility to produce hydrogen under a lower temperature and atmospheric pressure. Here, a honeycomb reactor is proposed to make the hydrogen production process is carried out at 600 oC. Experiments are performed via an endothermic NiO reduction reaction with methane. NiO is made into porous honeycomb chambers, realizing the integration of OC and reactor. The performances of hydrogen production are experimentally examined at the methane flow rate of 300-600 ml/min. The results show that the increasing of methane inlet flow rate of the reaction can make the hydrogen production is gradually advanced. But there is an optimal value, once the flow rate is excessive, it will have an inhibitory effect on the hydrogen production. Also, methane always maintains a high conversion rate as long as the oxygen content of OC is not deficient. Additionally, 15 cycles reaction are performed. The chemical-looping cycle hydrogen production process in the honeycomb reactor is proved to be extremely stable.

Keywords hydrogen production, chemical-looping cycle, solar energy, honeycomb reactor.