%0 Journal Article
%@ 02638762
%A Salam, M.A.
%A Abdullah, B.
%A Islam, M.A.
%D 2017
%F scholars:9393
%I Institution of Chemical Engineers
%J Chemical Engineering Research and Design
%K Activation energy; Aluminum compounds; Chemical analysis; Dehydrogenation; Fourier transform infrared spectroscopy; Hydrides; Hydrogenation; Magnesium; Nanocrystalline materials; Nickel; Precipitation (chemical); X ray diffraction, Ambient conditions; Chemical adsorption; Coprecipitation method; Hydrogenation process; Reversible hydrides; Temperature programmed; Temperature-programmed reduction; X-ray diffractograms, Temperature programmed desorption
%P 103-111
%R 10.1016/j.cherd.2016.10.039
%T Temperature programmed analysis of hydrogenation and dehydrogenation of magnesium (Mg), nickel (Ni) and aluminum (Al) containing mixed oxides
%U https://khub.utp.edu.my/scholars/9393/
%V 118
%X 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
%Z cited By 4