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- W3096565489 abstract "TiO 2 samples with different crystal sizes and compositions were synthesized using a sol-gel method at different calcination temperatures (350–900 °C). The activity and stability of TiO 2 samples were determined by the gasification of formaldehyde in supercritical water (SCW) and by treatment in SCW. Increasing calcination temperature and SCW gasification (SCWG)/SCW treatment decreased the surface area of anatase TiO 2 samples due to growing crystallite size via agglomeration and sintering. Among anatase TiO 2 samples, the TiO 2 calcinated at 450 °C was found as the most suitable material under SCW conditions. However, the surface area of rutile TiO 2 slightly increased from 17.2 m 2 g −1 to 19.8 m 2 g −1 with the weakly crumbling of particles during SCWG. The highest hydrogen formation (63%) from formaldehyde in the SCW was obtained in the presence of anatase TiO 2 calcined at 350 °C and rutile TiO 2 calcined at 800 °C. CO 2 formation in the presence of anatase TiO 2 is higher than rutile TiO 2 because of the presence of active lattice oxygen species (O − , O 2− ) based on O 2 -TPD. • TiO 2 samples with different crystal sizes and phase composition were prepared. • Increasing calcination temperature increased the agglomeration of anatase TiO 2 . • SCW/SCWG accelerated the conversion of anatase into rutile. • Attrition resistance of rutile TiO 2 is lower than anatase TiO 2 . • Active lattice oxygen species on TiO 2 increased the formation of CO 2 ." @default.
- W3096565489 created "2020-11-09" @default.
- W3096565489 creator A5023937878 @default.
- W3096565489 date "2021-01-01" @default.
- W3096565489 modified "2023-10-03" @default.
- W3096565489 title "Activity and stability of TiO2 samples with different phase compositions in the decomposition of formaldehyde in SCW" @default.
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- W3096565489 doi "https://doi.org/10.1016/j.ijhydene.2020.10.072" @default.
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