Activity and stability of TiO2 samples with different phase compositions in the decomposition of formaldehyde in SCW
| dc.authorid | 0000-0002-0806-4549 | tr |
| dc.contributor.author | Ateş, Ayten | |
| dc.date.accessioned | 2022-05-11T06:14:31Z | |
| dc.date.available | 2022-05-11T06:14:31Z | |
| dc.date.issued | 6 January 2021 | tr |
| dc.department | Mühendislik Fakültesi | tr |
| dc.description.abstract | TiO2 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 TiO2 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 TiO2 samples due to growing crystallite size via agglomeration and sintering. Among anatase TiO2 samples, the TiO2 calcinated at 450 °C was found as the most suitable material under SCW conditions. However, the surface area of rutile TiO2 slightly increased from 17.2 m2 g−1 to 19.8 m2 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 TiO2 calcined at 350 °C and rutile TiO2 calcined at 800 °C. CO2 formation in the presence of anatase TiO2 is higher than rutile TiO2 because of the presence of active lattice oxygen species (O−, O2−) based on O2-TPD. | tr |
| dc.description.sponsorship | This study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK), Turkey (Grant No.213M398). | tr |
| dc.identifier.doi | 10.1016/j.ijhydene.2020.10.072 | en_US |
| dc.identifier.endpage | 1856 | tr |
| dc.identifier.issue | 2 | tr |
| dc.identifier.scopus | 2-s2.0-85095757226 | en_US |
| dc.identifier.scopusquality | N/A | |
| dc.identifier.startpage | 1842 | tr |
| dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0360319920338696 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12418/12757 | |
| dc.identifier.volume | 46 | tr |
| dc.identifier.wos | WOS:000605147300034 | en_US |
| dc.identifier.wosquality | Q2 | |
| dc.indekslendigikaynak | Web of Science | en_US |
| dc.indekslendigikaynak | Scopus | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | ELSEVİER | tr |
| dc.relation.ispartof | International Journal of Hydrogen Energy | en_US |
| dc.relation.publicationcategory | Uluslararası Hakemli Dergide Makale - Kurum Öğretim Elemanı | tr |
| dc.relation.tubitak | 213M398 | |
| dc.rights | info:eu-repo/semantics/closedAccess | tr |
| dc.subject | Stability; TiO2; Sol-gel; SCWG; Formaldehyde | tr |
| dc.title | Activity and stability of TiO2 samples with different phase compositions in the decomposition of formaldehyde in SCW | en_US |
| dc.type | Article | en_US |
