CO impurities effect on LaNi4.7Al0.3 hydrogen storage alloy hydrogenation/dehydrogenation properties

Bulletin of materials science

Liqun Cui²  Fuqiang Zhai²  Ping Li⁴  Yunlong Li²  Weina Zhang²  Qi Wan²  Xuanhui Qu¹  Alex A Volinsky³ 

[1] Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing, Beijing 100083, China$$Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing, Beijing 100083, China$$State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing, Beijing 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing, Beijing 100083, China$$;Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$;Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA$$Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USADepartment of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA$$;Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA$$Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA$$Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USAInstitute for Advanced Materials and Technology, University of Science and Technology, Beijing, Beijing 100083, China$$Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA$$

关键词: LaNi4.7Al0.3 hydrogen storage alloy;    CO impurities gas;    hydrogen purification;    absorption/desorption kinetics.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

LaNi_4.7Al_0.3 alloy was prepared by vacuum induction melting in high purity helium atmosphere, and the ingot was pulverized into 200â€�??400 mesh powder after annealing. X-ray diffraction (XRD) and scanning electron microscopies (SEM) were utilized to study the alloy morphology and phase structure. X-ray photoelectron spectroscopy (XPS) was used for surface analysis. The poisoned alloy was tested at 30 °C in the mixture gas by thermogravimetric and differential thermal analyses (TG ₊ DTA). The hydrogen storage properties were studied by the pressureâ€�?�compositionâ€�?�temperature test. The activated sample was completely deactivated after only 3 hydriding/dehydriding cycles in hydrogen containing 300 ppm CO at 30 °C, but hydrogen storage capacity did not degrade when tested at 80 °C. Additionally, two different steps appeared in the absorption processes. Combined with XRD, XPS and TG ₊ DTA results, an explanation for this phenomenon is given.

【 授权许可】

Unknown