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Methanation of $CO_{2}$ Using MIL-53-Based Catalysts: $Ni/MIL-53–Al_{2}O_{3}$ versus Ni/MIL-53
| Content Provider | MDPI |
|---|---|
| Author | Grad, Oana Blanita, Gabriela Lazar, Mihaela D. Mihet, Maria |
| Copyright Year | 2021 |
| Description | MIL-53 and the $MIL-53–Al_{2}O_{3}$ composite synthesized by a solvothermal procedure, with water as the only solvent besides $CrCl_{3}$ and benzene-1,4-dicarboxylic acid (BDC), were used as catalytic supports to obtain the novel MIL-53-based catalysts Ni(10 wt.%)/MIL-53 and Ni(10 $wt.%)/MIL-53–Al_{2}O_{3}$. Ni nanoparticle deposition by an adapted double-solvent method leads to the uniform distribution of metallic particles, both smaller (≤10 nm) and larger ones (10–30 nm). $MIL-53–Al_{2}O_{3}$ and $Ni/MIL-53–Al_{2}O_{3}$ show superior thermal stability to MIL-53 and Ni/MIL-53, while $MIL-53–Al_{2}O_{3}$ samples combine the features of both MIL-53 and alumina in terms of porosity. The investigation of temperature’s effect on the catalytic performance in the methanation process $(CO_{2}:H_{2}$ = 1:5.2, GHSV = 4650 $h^{−1}$) revealed that Ni/MIL-53 is more active at temperatures below 300 °C, and $Ni/MIL-53–Al_{2}O_{3}$ above 300 °C. Both catalysts show maximum $CO_{2}$ conversion at 350 °C: 75.5% for Ni/MIL-53 (methane selectivity of 93%) and 88.8% for $Ni/MIL-53–Al_{2}O_{3}$ (methane selectivity of 98%). Stability tests performed at 280 °C prove that $Ni/MIL-53–Al_{2}O_{3}$ is a possible candidate for the $CO_{2}$ methanation process due to its high $CO_{2}$ conversion and $CH_{4}$ selectivity, corroborated by the preservation of the structure and crystallinity of MIL-53 after prolonged exposure in the reaction medium. |
| Starting Page | 1412 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal11111412 |
| Journal | Catalysts |
| Issue Number | 11 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-21 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Applied Chemistry Mil-53–al2o3 Ni/mil-53 Catalyst Ni/mil-53–al2o3 Catalyst Methanation of Co2 |
| Content Type | Text |
| Resource Type | Article |
