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Publication
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| Title of Article |
Catalytic activities of titania-supported nickel for carbon-dioxide methanation. |
| Date of Acceptance |
6 July 2020 |
| Journal |
| Title of Journal |
Chemical Engineering Science |
| Standard |
ISI |
| Institute of Journal |
elsevier.ltd. |
| ISBN/ISSN |
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| Volume |
2020 |
| Issue |
228 |
| Month |
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| Year of Publication |
2020 |
| Page |
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| Abstract |
Titania-supported nickel catalysts (3, 6, 12 and 20 wt% Ni/TiO2) were prepared by a sol–gel method. The results showed that the CO2 conversion increased with increasing Ni content and 20 wt% Ni/TiO2 exhibited the highest CO2 conversion and CH4 yield. The results on XRD and EXAFS revealed unit cell expansion and lattice distortion, which indicated that Ni2+ was incorporated into the TiO2 lattice. Upon increasing the Ni content, the NiO phase was observed. The oxidation states of nickel and titanium were analyzed to be +2 and +4, respectively for fresh catalysts. After pretreatment by H2, Ni2+ was converted to Ni0 and this electronic state remained unchanged during the course of methanation while Ti4+ was kept unaltered
for fresh catalysts and those during the reaction. The addition of Ni led to the formation of oxygen
vacancy and NiO phase which might act as adsorption sites for CO2 and H2, respectively. |
| Keyword |
Carbon-dioxide methanation, Titania-supported, nickel, XANES, EXAFS |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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