Logo

Temperature programmed analysis of hydrogenation and dehydrogenation of magnesium (Mg), nickel (Ni) and aluminum (Al) containing mixed oxides

Salam, M.A. and Abdullah, B. and Islam, M.A. (2017) Temperature programmed analysis of hydrogenation and dehydrogenation of magnesium (Mg), nickel (Ni) and aluminum (Al) containing mixed oxides. Chemical Engineering Research and Design, 118 . pp. 103-111.

Full text not available from this repository.

Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

Hydrotalcite derived magnesium (Mg), nickel (Ni), and aluminum (Al) containing a mixed oxide of Mg0.5Ni0.25Al0.25O1.13has been synthesized using co-precipitation method. Hydrogenation and dehydrogenation of Mg0.5Ni0.25Al0.25O1.13mixed oxide has been studied using conventional temperature programmed reduction (TPR) and temperature programmed desorption (TPD) method. ICP-MS analysis ensured the composition of metals in a solid solution of mixed oxides. Surface composition was confirmed via EDX analysis. Different oxide, spinel phases were predicted by the X-ray diffraction (XRD) and FT-IR analyses. Temperature-programmed reduction/desorption analyses showed remarkable hydrogenation and dehydrogenation at near ambient conditions. Reduced mixed oxides showed significant hydrogenation at a temperature range of 0–180 °C. X-ray diffractogram and FTIR spectroscopy predicted the hydrogenated phases of MgH2and Mg2NiH4as a stable product of hydrogenation. The analyses correspond the physical and chemical adsorption in whole hydrogenation process of Mg0.5Ni0.25Al0.25O1.13mixed oxides. The activation energy of dehydrogenation is 60 kJ/mol which indicate the formation of reversible hydride phases of MgH2and Mg2NiH4. © 2016

Item Type:Article
Impact Factor:cited By 0
Departments / MOR / COE:Division > Academic > Faculty of Engineering > Chemical Engineering
ID Code:19806
Deposited By: Ahmad Suhairi
Deposited On:22 Apr 2018 12:58
Last Modified:22 Apr 2018 12:58

Repository Staff Only: item control page