Hydrogen separation from mixed gas streams using reversible metal hydrides

Sheridan, J.; Eisenberg, F.G.; Greskovich, E. J.; Sandrock, G.; Huston, E.L.

doi:10.1016/0022-5088(83)90355-7

Cited by 54 publications

(20 citation statements)

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“…Selectivity of reversible hydrogen interaction with hydrideforming materials allows for the development of simple and efficient systems for hydrogen extraction from gaseous mixtures and its fine purification [1][2][3][4][5][6]. A challenging problem that hampers this approach is in the deterioration of MH performances caused by the gas impurities (O 2 , H 2 O, CO, sulphur-containing compounds, etc.)…”

Section: Introductionmentioning

confidence: 99%

Surface-modified advanced hydrogen storage alloys for hydrogen separation and purification

Lototsky

Williams

Yartys

et al. 2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Surface-modified advanced hydrogen storage alloys for hydrogen separation and purification

Lototsky

Williams

Yartys

et al. 2011

Journal of Alloys and Compounds

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“…However, so far, this approach was successfully implemented only for hydrogen-rich feed gases (vent streams in the ammonia synthesis loop, H 2 > 50%) which contain relatively innocuous admixtures, mainly nitrogen and argon [3,4]. At the same time, the gases associated with processing of coal, petrol, natural gas and other carbonaceous/fossil fuels feedstock, in addition to hydrogen, may contain significant amounts of other components, mainly carbon dioxide and monoxide, which in most cases cause the deterioration of hydrogen sorption performances of metal hydrides (MHs) [5,6].…”

Section: Introductionmentioning

confidence: 99%

Application of surface-modified metal hydrides for hydrogen separation from gas mixtures containing carbon dioxide and monoxide

Lototskyy

Modibane

Williams

et al. 2013

Journal of Alloys and Compounds

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Lototskyy, M. et al. (2013). Application of surface-modified metal hydrides for hydrogen separation from gas mixtures containing carbon dioxide and monoxide. AbstractApplication of surface-modified MH material for H2 separation using temperature/pressure swing absorption-desorption was studied. The substrate alloy had the following composition LaNi3.55Co0.75Al0.4-Mn0.3, and the surface modification was carried out through fluorination followed by aminosilane functionalization and electroless deposition of Pd. The material was found to have good poisoning tolerance towards surface adsorbates, even for the large (rv1.5 kg) batches. Feasibility of its application for H2 separation from gas mixtures (up to 30% CO2 and 100 ppm CO) was demonstrated by testing of a prototype H2 separation system (rv280 g of MH in two reactors), and H2 separation reactor (0.75 kg of MH). The H2 separation was characterized by stable performances in the duration of 250 absorption/desorption cycles. However, the total process productivity was found to be limited by the sluggish H2 absorption (partial H2 pressure 62.5 bar, temperature below 100 °C). In the presence of CO2 and CO, additional deceleration of H2 absorption was observed at space velocities of the feed gas below 5000 h 1. Introduction Selectivity of reversible hydrogen interaction with hydride-forming materials allows for the development of simple and efficient pressure/temperature swing absorptiondesorption systems for hydrogen separation from complex gas mixtures and its fine purification [1,2]. However, so far, this approach was successfully implemented only for hydrogen-rich feed gases (vent streams in the ammonia synthesis loop, H 2 > 50%) which contain relatively innocuous admixtures, mainly nitrogen and argon [3,4]. At the same time, the gases associated with processing of coal, petrol, natural gas and other carbonaceous/fossil fuels feedstock, in addition to hydrogen, may contain significant amounts of other components, mainly carbon dioxide and monoxide, which in most cases cause the deterioration of hydrogen sorption performances of metal hydrides (MHs) [5,6].

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“…If cooling rate is insufficient, the crisis occurs when a maximum temperature is reached and amount of reaction heat generated by absorbed hydrogen corresponds to the sensible heat needed to heat up the metal hydride bed to maximum temperature. Heat transfer to coolant can be neglected in this case and heating at the first phase can be treated as adiabatic [12]. Thus the heat and mass transfer crisis is connected with transition between the adiabatic heating and the heat transfer phases of the reaction.…”

Section: Heat and Mass Transfer Crisismentioning

confidence: 99%

“…Selective hydrogen sorption by intermetallic alloys can be used for hydrogen purification [10]. Pilot plants were made for recovery of hydrogen from industrial off-gas streams [12] in ammonia production [13], and hydride technologies can be more efficient than conventional ones [14]. In our opinion integrated metal hydride purification and storage systems can be used for purification and utilization of biohydrogen.…”

Section: Introductionmentioning

confidence: 99%