Improving catalytic performance <i>via</i> induction heating: selective oxidation of H<sub>2</sub>S on a nitrogen-doped carbon catalyst as a model reaction

Wang, Wei; Duong‐Viet, Cuong; Truong‐Phuoc, Lai; Truong-Huu, Tri; Nguyen, Hoang M.; Nguyen, Dinh Lam; Liu, Yuefeng; Pham‐Huu, Cuong

doi:10.1039/d2nj04897c

Cited by 7 publications

(2 citation statements)

References 57 publications

(120 reference statements)

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“…It is worthy to note that with conventional Joule heating almost no CNF growth process was observed at such low synthesis temperature (Figure 3A (right)). The ability of IH to initiate catalytic processes at much lower temperature than JH has already been observed by other groups [47,[63][64][65][66]. Such results could be explained by the fact that the high heating rate of the IH and the lack of thermal inertia allow one to maintain the reaction temperature as close as to the theoretical one which is not the case for the JH mode due to high inertia in temperature regulation as discussed above.…”

Section: Inductive Heating Vs Joule Heating For Cnf Growthmentioning

confidence: 71%

Low-temperature Synthesis of Carbon Nanofibers/graphite Felt Composites Under Contactless Induction Heating

Duong‐Viet¹,

Truong‐Phuoc²,

Romero³

et al. 2023

Rev. Chim.

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In this report induction heating was used for the catalytic chemical vapor decomposition synthesis of carbon nanofibers (CNFs) on Ni-based catalyst. The CNFs were produced with a high yield at a relatively low temperature compared to that observed for conventional heating through convection and conduction. The process also occurred in the absence of secondary toxic organic compounds, formed through side reaction in the high temperature gas-phase or through decomposition on the hot wall of reactor as encountered with traditional Joule heating mode. The improved CNFs yield under induction heating was attributed to the high reaction temperature control thanks to the high temperature regulation rate provided by the induction heating coil. The local heating of the nickel nanoparticles by the electromagnetic field could also contribute to the improvement of the CNFs yield. The results obtained indicate that inductive heating mode could be of great interest for improving the heat transfer in catalytic processes and also to reduce the problem of gradient temperature occurring inside the catalyst bed during the operating of highly exothermic or endothermic processes. It is expected that such electricity-driven heating mode could have contributed in an efficient way toward the electrification of different catalytic processes in order to reduce the associated carbon footprint.

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Section: Inductive Heating Vs Joule Heating For Cnf Growthmentioning

confidence: 71%

Low-temperature Synthesis of Carbon Nanofibers/graphite Felt Composites Under Contactless Induction Heating

Duong‐Viet¹,

Truong‐Phuoc²,

Romero³

et al. 2023

Rev. Chim.

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“…The WHSV stands as a crucial factor influencing catalytic performance for the H 2 S reaction, and lower space velocity (WHSV) means that the contact time between the reactant and the catalyst is relatively long. ,,, When WHSV increased from 10,000 to 40,000 mL·g –1 ·h –1 , the conversion rate decreased gradually from 99.5 to 73.6%. Meanwhile, the S selectivity rose from 77.0 to 84.8% (Figure c).…”

Section: Resultsmentioning

confidence: 99%

Manipulation of Waste-Activated Carbon Absorbers as Efficient Carbocatalysts for H₂S Selective Oxidation

Wang,

Liu,

Shan

et al. 2024

Ind. Eng. Chem. Res.

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Carbon-based catalysts have been widely reported as efficient metal-free catalysts for the selective oxidation of hydrogen sulfide (H 2 S). Waste-activated carbon adsorbed with saturated VOCs (i.e., styrene) has a complicated composition, and its recycling and reuse have become a major global concern due to the catastrophic environmental damage that wrong treatment may create. Here, we show a simple, green, and low-energy solvent-free method to prepare N-doped porous carbocatalysts for selective oxidation of H 2 S by direct carbonization of waste-activated carbon adsorbed with saturated VOCs mixed with melamine. The assynthesized catalysts (N@AC-T) have high specific surface areas and a significant number of active pyridinic N sites. The optimized N-doped carbon (N@AC-700) catalyst exhibits competitive H 2 S selective oxidation activity (H 2 S conversion of 96.2% and sulfur formation rate of 225 g sulfur •kg cat.−1 •h −1 at 190 °C) and superior stability (around 50 h) and water vapor resistance. Furthermore, the monolithic carbon catalysts prepared by using a biomass binder also present excellent desulfurization performance (H 2 S conversion >90% at 190 °C). The excellent catalytic performance was shown by a series of characterization results to be related to the combined effect of specific surface areas and the pyridinic N active sites. This work aims to design and prepare efficient N-doped carbon desulfurization catalysts for high potential industrial applications by rationally recycling and reusing waste carbon through a green and nonpolluting solvent-free method.

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High-efficiency graphene-coated macroscopic composite for catalytic methane decomposition operated with induction heating

Essyed,

Pham,

Truong-Phuoc

et al. 2024

Chemical Engineering Journal

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Improving catalytic performance via induction heating: selective oxidation of H₂S on a nitrogen-doped carbon catalyst as a model reaction

Abstract: Macroscopic nitrogen-doped mesoporous carbon coated silicon carbide catalyst (NMC/SiC) has been developed and fully evaluated as metal-free catalyst for selective oxidation of H2S into elemental sulfur under various conditions using...

Cited by 7 publications

References 57 publications

Low-temperature Synthesis of Carbon Nanofibers/graphite Felt Composites Under Contactless Induction Heating

Low-temperature Synthesis of Carbon Nanofibers/graphite Felt Composites Under Contactless Induction Heating

Manipulation of Waste-Activated Carbon Absorbers as Efficient Carbocatalysts for H₂S Selective Oxidation

High-efficiency graphene-coated macroscopic composite for catalytic methane decomposition operated with induction heating

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Improving catalytic performance via induction heating: selective oxidation of H2S on a nitrogen-doped carbon catalyst as a model reaction

Abstract: Macroscopic nitrogen-doped mesoporous carbon coated silicon carbide catalyst (NMC/SiC) has been developed and fully evaluated as metal-free catalyst for selective oxidation of H2S into elemental sulfur under various conditions using...

Cited by 7 publications

References 57 publications

Low-temperature Synthesis of Carbon Nanofibers/graphite Felt Composites Under Contactless Induction Heating

Low-temperature Synthesis of Carbon Nanofibers/graphite Felt Composites Under Contactless Induction Heating

Manipulation of Waste-Activated Carbon Absorbers as Efficient Carbocatalysts for H2S Selective Oxidation

High-efficiency graphene-coated macroscopic composite for catalytic methane decomposition operated with induction heating

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Product

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Improving catalytic performance via induction heating: selective oxidation of H₂S on a nitrogen-doped carbon catalyst as a model reaction

Manipulation of Waste-Activated Carbon Absorbers as Efficient Carbocatalysts for H₂S Selective Oxidation