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Monolithic Zn–Co–Ti based sorbents for hot syngas desulfurization
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chomiak, Michelle Trawczyński, Janusz Blok, Z. Babiński, Piotr |
| Copyright Year | 2016 |
| Abstract | Abstract Charge of monolithic Zn–Co–Ti–O based sorbent was manufactured using natural clay as a binder and tested in model hot syngas desulfurization. Fresh and regenerated sorbent was characterized by XRD, SEM–EDX, XPS, mercury porosimetry, and TPRH 2 . After four cycles of desulfurization (at 540 °C) and regeneration (540–650 °C), monoliths retained the mechanical integrity and their geometry did not change. Monolithic sorbent captured 5.3 g S/100 g in the first cycle and 13.8 g S/100 g in the last one. Concentration of H 2 S in the treated gas was lowered from 6000 ppmv to 3 ppmv and the H 2 S removal efficiency was min. 99.6%. Fresh sorbent contains Zn 2 Ti 3 O 8 (dominant phase), TiO 2 and SiO 2 , while in the regenerated one always occurs: TiO 2 (dominant phase), ZnTiO 3 , Zn 2 Ti 3 O 8 ; SiO 2 ; Zn 2 SiO 4 and ZnAl 2 O 4 . Reducibility and the amount of sulfates formed in the used sorbent depend on its position in the bed. After tests, small amounts of free ZnO are present on the surface of the used monoliths. During regeneration the zinc oxide (from Zn–Ti–O mixed oxides) reacts with Al 2 O 3 or SiO 2 (clay components), and forms compounds more resistant to deactivation, such as Zn 2 SiO 4 and ZnAl 2 O 4 . |
| Starting Page | 64 |
| Ending Page | 70 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.fuproc.2015.12.016 |
| Volume Number | 144 |
| Alternate Webpage(s) | http://www.ichpw.pl/wp-content/uploads/2016/01/Monolithic-Zn%E2%80%93Co%E2%80%93Ti-based-sorbents-for-hot-syngas-desulfurization.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.fuproc.2015.12.016 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
