Non-isothermal kinetics and in situ SR XRD studies of hydrogen desorption from dihydrides of binary Ti–V alloys

Suwarno, Suwarno; Solberg, Jan Ketil; Mæhlen, Jan Petter; Denys, R.V.; Krogh, B.; Ochoa‐Fernández, Esther; Børresen, B.; Rytter, Erling; Gabis, I. E.; Yartys, V.A.

doi:10.1016/j.ijhydene.2013.08.103

Cited by 15 publications

(5 citation statements)

References 30 publications

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“…Hydrogen desorption from Ti-V hydrides was studied by thermal desorption spectroscopy [105]. The desorption spectra of hydrogen desorption are mainly composed of 3 peaks related to the stages of hydrogenation.…”

Section: Bcc Ti-v Alloysmentioning

confidence: 99%

Metal (boro-) hydrides for high energy density storage and relevant emerging technologies

Bannenberg

Heere

Benzidi

et al. 2020

International Journal of Hydrogen Energy

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Section: Bcc Ti-v Alloysmentioning

confidence: 99%

Metal (boro-) hydrides for high energy density storage and relevant emerging technologies

Bannenberg

Heere

Benzidi

et al. 2020

International Journal of Hydrogen Energy

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“…Most frequently used analytically derived reaction models [16,20,21,22] and their relation to the general representation of the rate dependence function, G M,N,P (X) (Eq. (6)) [13,19], are presented in the Supplementary Information file, Table S1 and Fig.…”

Section: Modeling Of the Tds Spectramentioning

confidence: 99%

Thermal desorption spectroscopy studies of hydrogen desorption from rare earth metal trihydrides REH3 (RE=Dy, Ho, Er)

Suwarno

Lototskyy

Yartys

2020

Journal of Alloys and Compounds

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Rare earth (RE) metals form two stoichiometric hydrides, REH 2 and REH 3 , and for the yttrium group of RE transformation of a FCC (REH 2) into an HCP (REH 3) lattice takes place during the second step of hydrogenation REH 2 þ ½ H 2 / REH 3. Earlier studies of the hydrogen desorption properties of the rare earth hydrides were limited to Y and RE ¼ La, Ce, Pr, Nd, Sm, Gd, Tb and Er. The present work is focused on the studies of the kinetics and mechanism of hydrogen desorption from trihydrides of heavy rare earths, DyH 3 , HoH 3, and ErH 3. The Thermal Desorption Spectroscopy (TDS) studies were performed at pressures below 1 Â 10 À5 mbar during linear heating from room temperature to 1173 K at different heating rates ranging from 1 to 5.5 K/min. Hydrogen desorption traces show the presence of two main events with the low-temperature peak appearing below 573 K, while the second peak is positioned at 1083e1159 K, with the peak temperatures gradually increasing following the rise of the heating rate. Fitting of the peak temperatures in the TDS spectra using the Kissinger method yielded activation energies of hydrogen desorption for both hydrogen desorption events. For DyH 3 and ErH 3 , the shapes of the TDS spectra appear to be well described by a phase-stuctural transformation following a model of nucleation and growth, while for HoH 3 the dehydrogenation mechanism includes a phase boundary reaction. This applied model of phase-structural transformations shows differences in dimensionality and rate-limiting steps as related to the studied compound and the desorption events, REH 3 / REH 2 or REH 2 / RE.

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“…Using a deconvolution procedure [11], the TDS spectra can be fitted with 4 curves which mean that dehydrogenation of TiH2 consisted of 4 steps. An example of TDS curve deconvolution is shown in Figure 2b for 5 K/min heating rate.…”

Section: Thermal Desorption Studies In Vacuummentioning

confidence: 99%

Kinetics of Hydrogen Absorption and Desorption in Titanium

Suwarno

Yartys

2017

Bull. Chem. React. Eng. Catal.

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Titanium is reactive toward hydrogen forming metal hydride which has a potential application in energy storage and conversion. Titanium hydride has been widely studied for hydrogen storage, thermal storage, and battery electrodes applications. A special interest is using titanium for hydrogen production in a hydrogen sorption-enhanced steam reforming of natural gas. In the present work, nonisothermal dehydrogenation kinetics of titanium hydride and kinetics of hydrogenation in gaseous flow at isothermal conditions were investigated. The hydrogen desorption was studied using temperature desorption spectroscopy (TDS) while the hydrogen absorption and desorption in gaseous flow were studied by temperature programmed desorption (TPD). The present work showed that the path of dehydrogenation of the TiH2 is  hydride phase with possible overlapping steps occurred. The fast hydrogen desorption rate observed at the TDS main peak temperature were correlated with the fast transformation of the TiH1.41 to TiH0.59. In the gaseous flow, hydrogen absorption and desorption were related to the transformation of TiH0.59  TiH1.41 with 2 wt.% hydrogen reversible content.

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Non-isothermal kinetics and in situ SR XRD studies of hydrogen desorption from dihydrides of binary Ti–V alloys

Cited by 15 publications

References 30 publications

Metal (boro-) hydrides for high energy density storage and relevant emerging technologies

Metal (boro-) hydrides for high energy density storage and relevant emerging technologies

Thermal desorption spectroscopy studies of hydrogen desorption from rare earth metal trihydrides REH3 (RE=Dy, Ho, Er)

Kinetics of Hydrogen Absorption and Desorption in Titanium

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