Synthesis, characterization and activity pattern of carbon nanofibers based copper/zirconia catalysts for carbon dioxide hydrogenation to methanol: Influence of calcination temperature

Din, Israf Ud; Shaharun, Maizatul Shima; Subbarao, Duvvuri; Akhtar, Naeem

doi:10.1016/j.jpowsour.2014.10.087

Cited by 83 publications

(34 citation statements)

References 65 publications

(40 reference statements)

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“…Clearly, the amount of ammonia desorption from ZnO/m‐ZrO 2 sample is more than that from ZnO/t‐ZrO 2 . This is consistent with the previous report that m‐ZrO 2 had more acidic sites than t‐ZrO 2 [16] …”

Section: Resultssupporting

confidence: 94%

“…The desorption peak β between 400–440 °C is due to the presence of medium acidic sites. For ZnO/t‐ZrO 2 ‐600 sample, a third peak (peak γ) at about 470 °C is attributed to the strong acidic sites [16] . Clearly, the amount of ammonia desorption from ZnO/m‐ZrO 2 sample is more than that from ZnO/t‐ZrO 2 .…”

Section: Resultsmentioning

confidence: 95%

“…For methanol synthesis reaction on different ZrO 2 morphologies, various factors that affected the reaction performance had been proposed. For example, oxygen vacancies, [35] copper surface area [16] as well as the amount of Lewis acid centers [17] . For the ZnO/ZrO 2 systems, the acidic sites on the surface and the adsorption amount of H 2 were tested.…”

Section: Resultsmentioning

confidence: 99%

“…For ZnO/t-ZrO 2 -600 sample, a third peak (peak γ) at about 470°C is attributed to the strong acidic sites. [16] Clearly, the amount of ammonia desorption from ZnO/m-ZrO 2 sample is more than that from ZnO/t-ZrO 2 . This is consistent with the previous report that m-ZrO 2 had more acidic sites than t-ZrO 2 .…”

Section: Nh 3 -Tpd Spectramentioning

confidence: 97%

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CO₂ Hydrogenation to Methanol on ZnO/ZrO₂ Catalysts: Effects of Zirconia Phase

2021

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ZnO/ZrO2 samples were obtained by impregnation ZnO on three different ZrO2 polymorphic phases: monoclinic, tetrahedral and amorphous. The catalysts were tested for CO2 hydrogenation to methanol and the structure was determined using nitrogen physisorption, scanning electron microscope (SEM), Fourier transform infrared (FT‐IR) pyridine adsorption, hydrogen temperature‐programmed desorption (H2‐TPD), CO2‐TPD and X‐ray photoelectron spectroscopy (XPS). The results showed that the ZnO/tm‐ZrO2‐500 catalyst, with a mixture of both tetrahedral and monoclinic ZrO2 phases, had the highest CH3OH yield among all the samples. The yield of methanol is correlated to the lattice oxygen content for all the catalysts. During the reaction, formate and methoxy species seemed to be the active intermediate species.

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Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Nh 3 -Tpd Spectramentioning

confidence: 97%

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CO₂ Hydrogenation to Methanol on ZnO/ZrO₂ Catalysts: Effects of Zirconia Phase

2021

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“…Deposition precipitation method was adopted to synthesize CNF-based Cu/ZrO 2 catalysts. The detailed procedure for catalysts synthesis has been documented elsewhere [14][15][16]. Catalysts Cu•ZrO 2 /CNFs with 15 wt% each of Cu and ZrO 2 with CNFs as a support were synthesized.…”

Section: Catalysts Synthesismentioning

confidence: 99%

Effect of reaction conditions on the activity of novel carbon nanofiber-based Cu/ZrO2 catalysts for CO2 hydrogenation to methanol

Din¹,

Shaharun²,

Akhtar³

et al. 2020

Comptes Rendus. Chimie

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The increasing concentrations of CO 2 in the environment result in catastrophic phenomena like global warming. Hydrogenation of emitted CO 2 to methanol is one of the economically viable strategies to tackle the problem. In the current work, methanol synthesis by CO 2 hydrogenation was studied over carbon nanofiber-based Cu/ZrO 2 catalysts. The effect on rate of reaction by varying reaction temperature, reaction pressure, and feed gas ratio were investigated. Rate of reaction increased with increasing temperature and 220°C was found as an optimum reaction temperature. The study revealed a linear relationship between the rate of reaction and applied pressure of the feed gases. The rate of reaction was accelerated by increasing feed gas ratio and the highest activity was recorded for H 2 /CO 2 = 3.

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