Ce promoted lanthana-zirconia supported Ni catalyst system: A ternary redox system for hydrogen production

Khatri, Jyoti; Al‐Fatesh, Ahmed S.; Fakeeha, Anis H.; Ibrahim, Ahmed A.; Abasaeed, Ahmed E.; Kasim, Samsudeen Olajide; Osman, Ahmed I.; Patel, Rutu; Kumar, Rawesh

doi:10.1016/j.mcat.2021.111498

Cited by 26 publications

(33 citation statements)

References 71 publications

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“…The Ce/PZr catalyst shows a UV band of about 280 nm for the transition of O 2− to Ce +3 /Ce +4. 6 After the addition of ceria promoter in Ni/PZr catalyst (NiCe/PZr), the band at 280 nm is intensified. The charge transfer band of Ni +2 (O h ) merges with charge transfer band of Ce +3 /Ce +4 (O h ) and so band peak at 280 nm is intensified.…”

Section: Resultsmentioning

confidence: 99%

“…Khatri et al ceria promoted lanthanum‐zirconia supported nickel catalyst prepared by the wet impregnation method. 5Ni2.5Ce/LaZr showed 87% H 2 Yield and remains constant up to 460 min 6 …”

Section: Introductionmentioning

confidence: 92%

“…Table 1 shows catalytic activity in terms of H 2 yield for different supported catalyst systems over different reaction conditions. Ceria supported Ni catalyst, SiO 2 supported Ni catalyst, ZrO 2 supported Nickel catalyst and Al 2 O 3 supported Ni catalyst showed H 2 yield 14%, 36%, 43%, and 63% respectively 6,7,11,12 . Promotional addition of modifier strontium (0.75% Sr) in alumina supported Ni catalyst strengthened the metal support interaction and enhanced basicity 13 .…”

Section: Introductionmentioning

confidence: 96%

“…Overall, it is a highly endothermic reaction (Equation []). However, gasification of carbon by hydrogen and reduction of CO 2 by H 2 stream (Reverse water gas shift reaction) affects the hydrogen yield seriously (Equations [] and []) 6

{CH}_{4} \to normalC + 2 H_{2}, ∆ normalH = 74.9 kJ / mol,

{CO}_{2} + normalC ⇋ 2 CO, ∆ normalH = 172.5 kJ / mol,

{CH}_{4} + {CO}_{2} \leftrightarrow 2CO + {2H}_{2}, ∆H = + 247 kJ/mol,

normalC + 2 H_{2} \to {CH}_{4},

{CO}_{2} + H_{2} \to CO + H_{2} normalO .

From the catalytic point of view, DRM needs an active catalytic surface for CH 4 decomposition as well as a catalyst surface having good CO 2 adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

“…The catalytic activity of different ZrO 2 supported catalyst system in terms of CO 2 conversion, CH 4 conversion, and H 2 /CO ratio are shown in Figure S1 7,16‐27 and in term of H 2 yield are shown in Table 1. ZrO 2 supported Ni catalyst had 43% H 2 yield 6 . After addition of 18wt%CeO 2 in support ZrO 2 , the ceria‐zirconia support is prepared 15 .…”

Section: Introductionmentioning

confidence: 99%

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Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane

Khatri¹,

Fakeeha

Kasim

et al. 2021

Int J Energy Res

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Summary Ceria promoted phosphate‐zirconia supported nickel catalyst (10Ni1Ce/PZr; x = 0, 1, 1.5, 2, 2.5, 3, 5 wt%) are prepared and characterized by XRD, SEM, SEM‐EDX, CH4‐TPSR, NH3‐TPD, cyclic H2TPR‐CO2TPD‐H2TPR, and TPH. Ceria addition induces surface reducibility, exposes reduced phases of NiO and Ni2P2O7 as CH4 decomposition sites, and persuades additional CO2 adsorbed species as formate species over the catalyst surface. It also switches mobile oxygen in the lattice and thereafter oxide vacancy is replenished by oxygen from CO2 to a great extent. Altogether, 1 wt% ceria loading (10Ni1Ce/PZr) ensures more than 90% H2 yield (H2/CO = 0.96) whereas 2 wt% ceria loading inputs constancy in catalytic performance up to 440 min TOS. Up to 3 wt% ceria loading, 97% hydrogen yield (H2/CO ~1) is observed. Catalytic performance deteriorated above that 3 wt% ceria loading due to shading the catalytic active site or reoxidation of metallic nickel by excess ceria.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 96%

{CH}_{4} \to normalC + 2 H_{2}, ∆ normalH = 74.9 kJ / mol,

{CO}_{2} + normalC ⇋ 2 CO, ∆ normalH = 172.5 kJ / mol,

{CH}_{4} + {CO}_{2} \leftrightarrow 2CO + {2H}_{2}, ∆H = + 247 kJ/mol,

normalC + 2 H_{2} \to {CH}_{4},

{CO}_{2} + H_{2} \to CO + H_{2} normalO .

From the catalytic point of view, DRM needs an active catalytic surface for CH 4 decomposition as well as a catalyst surface having good CO 2 adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane

Khatri¹,

Fakeeha

Kasim

et al. 2021

Int J Energy Res

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Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Gonzalez Caranton,

Stavale,

Annese

et al. 2023

ChemCatChem

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Hydrotalcite‐based materials are preferred as catalysts due to their versatility and easiness of their synthesis. This work studies supported nickel catalysts made from hydrotalcites through sol‐gel synthesis, Ni‐EDTA impregnation, and coprecipitation. The synthetized hydrotalcites present nanocapsular morphology and dispersed nickel nano‐oxide particles after calcination at 500 °C. The catalysts were evaluated at 600 °C and 800 °C for 8 hours and demonstrated high conversions and varying yields, with sol‐gel oxide catalysts (SgOxMix) showing the best performance with the highest reactivity and controlled coke formation at 800 °C after 14 hours of testing. The mixed oxide morphology promotes electronic effects and inhibits carbon encapsulation of metallic particles. Principal component analysis was performed to explain fluctuations in the reaction pathway.

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Role of Ca, Cr, Ga and Gd promotor over lanthana‐zirconia–supported Ni catalyst towards H₂‐rich syngas production through dry reforming of methane

Al‐Fatesh

Khatri²,

Kumar

et al. 2022

Energy Science & Engineering

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Hydrogen production through methane dry reforming holds the promise of lowering greenhouse gases, that is CO2 and CH4, concentrations. Herein, Ca‐, Cr‐, Ga‐ and Gd‐promoted lanthana‐zirconia–supported Ni catalysts are investigated and characterized by X‐ray diffraction, Raman, infrared and UV‐vis spectroscopy, CH4‐temperature programmed surface reaction and cyclic reduction‐desorption experiment. All promoted catalyst systems had high and constant hydrogen yield (>70%) due to pronounced reoxidation capacity of reduced ‘NiO species strongly interacted with support’ through oxygen replenishment by CO2. The presence of mixed oxide and regeneration of reduced catalyst up to optimum level through oxygen replenishment by CO2 in Gd, as well as Cr‐promoted catalyst, outperformed (80% initially) than other promotors, Ca and Ga. In the long run (440 min to 33 h), Cr‐promoted catalyst system performed better than Gd‐promoted catalyst system as H2 yield remained constant ~79% due to the smallest energy gap between valance and conduction band, Ni‐Cr interaction species for wide range CH4 decomposition and chromate species for profound carbon deposit oxidation.

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Ce promoted lanthana-zirconia supported Ni catalyst system: A ternary redox system for hydrogen production

Cited by 26 publications

References 71 publications

Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane

Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Role of Ca, Cr, Ga and Gd promotor over lanthana‐zirconia–supported Ni catalyst towards H₂‐rich syngas production through dry reforming of methane

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Ce promoted lanthana-zirconia supported Ni catalyst system: A ternary redox system for hydrogen production

Cited by 26 publications

References 71 publications

Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane

Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Role of Ca, Cr, Ga and Gd promotor over lanthana‐zirconia–supported Ni catalyst towards H2‐rich syngas production through dry reforming of methane

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Role of Ca, Cr, Ga and Gd promotor over lanthana‐zirconia–supported Ni catalyst towards H₂‐rich syngas production through dry reforming of methane