Studies on the deactivation and activation of palladium impregnated carbon catalyst for environmental applications

Vinayakumar, Karthika; Palliyarayil, Ansari; Prakash, Pavan Seethur; Nandakumar, Shruthi; Kumar, Narender; Sil, Shreekantha

doi:10.1016/j.matpr.2020.05.110

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…A decrease in the AC-specific surface area and pore volume is expected due to metals impregnation in the micropores and deposition in the mesopores, causing channel blockage that decreases the pore volume. This behavior agrees with SEM-FEG results, indicating metal impregnation in porous channels and deposition on the support surface [39,60,72].…”

Section: Betsupporting

confidence: 89%

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Performance of supported metal catalysts in the dimethyl carbonate production by direct synthesis using CO2 and methanol

Faria

Santos

Bernard

et al. 2021

Journal of CO2 Utilization

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Section: Betsupporting

confidence: 89%

“…Such regions are essential because they serve to anchor metals on the support surface [59]. Activated carbon can be considered a very efficient support due to porous channels in its structure, facilitating metal impregnation [60]. Yet, dispersed and agglomerated particles in the activated carbon structure were observed in all samples.…”

Section: Sem-fegmentioning

confidence: 93%

Performance of supported metal catalysts in the dimethyl carbonate production by direct synthesis using CO2 and methanol

Faria

Santos

Bernard

et al. 2021

Journal of CO2 Utilization

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“…Vinayakumar et al [46] investigated the reactivation of a deactivated Pd/C catalyst (due to the passing of fresh H 2 S through fresh Pd/C) by exploring different methods.…”

Section: Model Validationmentioning

confidence: 99%

“…was reported for high-temperature catalytic reactions only (300 °C and above). Vinayakumar et al [46] investigated the reactivation of a deactivated Pd/C catalyst (due to the passing of fresh H2S through fresh Pd/C) by exploring different methods. The study showed that reactivation can be achieved by extracting the metal in a suitable media and subsequent re-impregnation on the carbon support, followed by liquid media reduction.…”

Section: Model Validationmentioning

confidence: 99%

Decomposition of Additive-Free Formic Acid Using a Pd/C Catalyst in Flow: Experimental and CFD Modelling Studies

et al. 2021

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The use of hydrogen as a renewable fuel has gained increasing attention in recent years due to its abundance and efficiency. The decomposition of formic acid for hydrogen production under mild conditions of 30 °C has been investigated using a 5 wt.% Pd/C catalyst and a fixed bed microreactor. Furthermore, a comprehensive heterogeneous computational fluid dynamic (CFD) model has been developed to validate the experimental data. The results showed a very good agreement between the CFD studies and experimental work. Catalyst reusability studies have shown that after 10 reactivation processes, the activity of the catalyst can be restored to offer the same level of activity as the fresh sample of the catalyst. The CFD model was able to simulate the catalyst deactivation based on the production of the poisoning species CO, and a sound validation was obtained with the experimental data. Further studies demonstrated that the conversion of formic acid enhances with increasing temperature and decreasing liquid flow rate. Moreover, the CFD model established that the reaction system was devoid of any internal and external mass transfer limitations. The model developed can be used to successfully predict the decomposition of formic acid in microreactors for potential fuel cell applications.

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Advances in porous material research towards the management of air pollution

et al. 2021

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Studies on the deactivation and activation of palladium impregnated carbon catalyst for environmental applications

Cited by 5 publications

References 33 publications

Performance of supported metal catalysts in the dimethyl carbonate production by direct synthesis using CO2 and methanol

Performance of supported metal catalysts in the dimethyl carbonate production by direct synthesis using CO2 and methanol

Decomposition of Additive-Free Formic Acid Using a Pd/C Catalyst in Flow: Experimental and CFD Modelling Studies

Advances in porous material research towards the management of air pollution

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