CO2 methanation over metal catalysts supported on ZrO2: Effect of the nature of the metallic phase on catalytic performance

Alves, Lizandra M.N.C.; Almeida, Mayra P.; Ayala, Martin; Watson, Caleb D.; Jacobs, Gary; Rabelo‐Neto, Raimundo C.; Noronha, Fábio B.; Mattos, Lisiane V.

doi:10.1016/j.ces.2021.116604

Cited by 26 publications

(11 citation statements)

References 52 publications

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“…There is a worldwide effort underway to find methods of recycling CO 2 , and one method is through its hydrogenation, a process that produces a substitute natural gas [ 1 , 2 ] or transportation fuels, either by Fischer–Tropsch synthesis (FTS) [ 3 , 4 ] or by methanol synthesis (used to produce alternative gasoline [ 5 , 6 ]). Sources of CO 2 include power generation plants [ 7 ], quarry activities [ 8 ], biogas [ 9 ], direct air capture systems [ 10 ], and ocean water [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

CO2 Hydrogenation: Na Doping Promotes CO and Hydrocarbon Formation over Ru/m-ZrO2 at Elevated Pressures in Gas Phase Media

et al. 2023

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Sodium-promoted monoclinic zirconia supported ruthenium catalysts were tested for CO2 hydrogenation at 20 bar and a H2:CO2 ratio of 3:1. Although increasing sodium promotion, from 2.5% to 5% by weight, slightly decreased CO2 conversion (14% to 10%), it doubled the selectivity to both CO (~36% to ~71%) and chain growth products (~4% to ~8%) remarkably and reduced the methane selectivity by two-thirds (~60% to ~21%). For CO2 hydrogenation during in situ DRIFTS under atmospheric pressure, it was revealed that Na increases the catalyst basicity and suppresses the reactivity of Ru sites. Higher basicity facilitates CO2 adsorption, weakens the C–H bond of the formate intermediate promoting CO formation, and inhibits methanation occurring on ruthenium nanoparticle surfaces. The suppression of excessive hydrogenation increases the chain growth probability. Decelerated reduction during H2-TPR/TPR-MS and H2-TPR-EXAFS/XANES at the K-edge of ruthenium indicates that sodium is in contact with ruthenium. A comparison of the XANES spectra of unpromoted and Na-promoted catalysts after H2 reduction showed no evidence of a promoting effect involving electron charge transfer.

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Section: Introductionmentioning

confidence: 99%

CO2 Hydrogenation: Na Doping Promotes CO and Hydrocarbon Formation over Ru/m-ZrO2 at Elevated Pressures in Gas Phase Media

et al. 2023

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“…The dispersed NiO species over these supports could be reduced in a wide temperature range of 450–700 °C. The MCM and ZrO 2 loaded Ni catalysts exhibited low CO 2 conversions of 4.7 and 8.1% at 300 °C, , while the Al 2 O 3 , TiO 2 , Y 2 O 3 , and MgAl 2 O 4 supported Ni catalysts showed higher CO 2 conversions (70–96%). ,− All the catalysts showed high CH 4 selectivity (85.1–100%) in the temperature range of 260–500 °C. Ni has also been supported on CeO 2 , and the NiO species could be reduced at relatively lower temperatures of 380–600 °C due to the interaction between NiO and CeO 2 .…”

Section: Resultsmentioning

confidence: 93%

Insights into Nickel-Based Dual Function Materials for CO₂ Sorption and Methanation: Effect of Reduction Temperature

et al. 2021

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Ni-MgO dual function materials (DFMs) show promise for integrated CO2 sorption and methanation. To improve CO2 sorption capacity, Ni-MgO DFMs are promoted with alkali metal nitrates. However, the high catalyst reduction temperature will result in high energy consumption, huge temperature gap between reduction (∼650 °C) and CO2 sorption and methanation (∼300 °C), and the loss of alkali metal nitrates. In this work, we prepared a Ni/CeO2 catalyst and investigated the effect of reduction temperature on its structure–property relationships in CO2 methanation, aiming to lower the reduction temperature to an isothermal level that matches CO2 methanation. Results indicated that the reduction temperature fell from over 650 to 300 °C, and Ni/CeO2 reduced at 300 °C featured high CO2 conversion (72.7%) and CH4 selectivity (98.9%). The CO2 methanation activity of Ni/CeO2 declined significantly when the reduction temperature exceeded 400 °C. The formation of more oxygen vacancy defects due to the interaction between NiO and CeO2 promoted the reduction of NiO species at lower temperatures. The declined CO2 methanation activity at high reduction temperatures was ascribed to the consumption of oxygen vacancies in catalyst reduction, and less defects were available for CO2 activation and methanation. An alkali metal nitrate promoted MgO adsorbent was physically mixed with Ni/CeO2 to construct (Li-Na-K)NO3-MgO-Ni/CeO2-phy DFMs for integrated CO2 sorption and methanation. The DFMs could be facilely reduced at 300 °C, and this has made it possible to realize the isothermal operation of catalyst reduction and CO2 sorption and methanation in integrated CO2 capture and utilization (ICCU). The (Li-Na-K)NO3-MgO-Ni/CeO2-phy DFMs reduced at 300 °C exhibited an impressive CO2 uptake of 2.74 mmol CO2/g DFMs and a great CH4 yield of 1.10 mmol CH4/g DFMs, and they could be a promising alternative to Ru-based DFMs with respect to their comparable CO2 sorption capacity and methanation activity and minimized cost of raw materials.

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“…Peaks at 1370 cm −1 , 1595 cm −1 , 1382 cm −1 , and 2879 cm −1 were attributed to the HCOO* species, while those at 2824 cm −1 and 2973 cm −1 were due to the CH 3 O* species. 45,49 The pre-treated samples were first analyzed under an atmosphere of CO 2 . A small amount of HCOO* species was formed, as shown in Fig.…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

The lattice oxygen determines the methanol selectivity in CO₂ hydrogenation over ZnZrO_x catalysts

Mao,

Zhang,

et al. 2024

Catal. Sci. Technol.

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CO2 methanation over metal catalysts supported on ZrO2: Effect of the nature of the metallic phase on catalytic performance

Cited by 26 publications

References 52 publications

CO2 Hydrogenation: Na Doping Promotes CO and Hydrocarbon Formation over Ru/m-ZrO2 at Elevated Pressures in Gas Phase Media

CO2 Hydrogenation: Na Doping Promotes CO and Hydrocarbon Formation over Ru/m-ZrO2 at Elevated Pressures in Gas Phase Media

Insights into Nickel-Based Dual Function Materials for CO₂ Sorption and Methanation: Effect of Reduction Temperature

The lattice oxygen determines the methanol selectivity in CO₂ hydrogenation over ZnZrO_x catalysts

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CO2 methanation over metal catalysts supported on ZrO2: Effect of the nature of the metallic phase on catalytic performance

Cited by 26 publications

References 52 publications

CO2 Hydrogenation: Na Doping Promotes CO and Hydrocarbon Formation over Ru/m-ZrO2 at Elevated Pressures in Gas Phase Media

CO2 Hydrogenation: Na Doping Promotes CO and Hydrocarbon Formation over Ru/m-ZrO2 at Elevated Pressures in Gas Phase Media

Insights into Nickel-Based Dual Function Materials for CO2 Sorption and Methanation: Effect of Reduction Temperature

The lattice oxygen determines the methanol selectivity in CO2 hydrogenation over ZnZrOx catalysts

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Insights into Nickel-Based Dual Function Materials for CO₂ Sorption and Methanation: Effect of Reduction Temperature

The lattice oxygen determines the methanol selectivity in CO₂ hydrogenation over ZnZrO_x catalysts