Hydrogen production from chemical looping reforming over Ni/CeO2 nanorod oxygen carrier in a fixed-bed reactor
In this work,a CeO2 nanorods-based oxygen carrier was prepared for hydrogen production from chemical looping steam reforming(CLSR)of ethanol.CeO2 nanorods(NR)served as a support for dispersing Ni particles.The Ni/CeO2 NR oxygen carrier was synthesized by a hydrothermal-impregnation method and characterized by powder X-ray diffraction,Raman spectra,transmission electron microscopy,X-ray photoelectron spectroscopy,and hydrogen temperature-programmed reduction.Transmission electron microscope revealed that nano-sized Ni particles were uniformly loaded on CeO2 NR.The activity and durability of Ni/CeO2 NR oxygen carrier were evaluated in the CLSR process with a fixed-bed tubular reactor.CeO2 NR supported Ni exhibited enhanced activity with a higher ethanol convention and H2 selectivity compared to conventional Ni/Al2O3.Additionally,Ni/CeO2 NR was more resistant to deactivation during the long-term CLSR testing.The high reactivity and durability of Ni/CeO2 NR is mainly attributed to the CeO2 NR support with large specific surface area and 110 and 100 planes which present great superiority for the dispersion of Ni nanoparticles,leading to a strong metal-support interaction effect.Besides,the CeO2 NR possesses high oxygen storage and mobility which is beneficial to the promotion of catalytic activity and removal of carbon deposition.
Hydrogen production Chemical looping steam reforming CeO2 nanorods Oxygen carrier Metal-support interaction
Lin LI Dawei TANG Bo JIANG Zhouwei ZHENG
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,Dalian University of Technology,Dalian 116024,China
国际会议
武汉
英文
548-556
2018-08-21（万方平台首次上网日期，不代表论文的发表时间）