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- Title
Influence of Hydrogen Sulfide and Redox Reactions on the Surface Properties and Hydrogen Permeability of Pd Membranes.
- Authors
Feng, Wei; Wang, Qingyuan; Zhu, Xiaodong; Kong, Qingquan; Wu, Jiejie; Tu, Peipei
- Abstract
Although hydrogen sulfide (H2S) was always a negative factor leading to the reduction of hydrogen permeability of palladium (Pd) membranes, its proper application could result in a positive effect. In this study, pure Pd membranes were firstly reacted with H2S at 23–450 °C, and then treated by redox reactions. Afterwards, the hydrogen permeability was tested under different reaction conditions using a hydrogen penetrant testing device. Moreover, both products and morphology changes occurred on the Pd membrane surface were analyzed using XRD, XPS and SEM. The results showed that H2S was dissociated to produce sulfides at 23 °C. With a rise of temperature, a regular change took place in the reaction products, morphology of the Pd membrane surface and hydrogen permeability. Adsorbed impurities such as sulfides and free carbon on the Pd membrane surface were removed by the redox treatment. The hydrogen permeability was improved by about 80% for the Pd membrane material subjected to the treatment method stated the above against the untreated one.
- Subjects
HYDROGEN sulfide; NONCARBOXYLIC acids; OXIDATION-reduction reaction; SURFACE properties; SULFIDES
- Publication
Energies (19961073), 2018, Vol 11, Issue 5, p1127
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en11051127