Evaluation of Au/γ-Al2O3 nanocatalyst for plasma-catalytic decomposition of toluene

Zhu, Dandan; Chen, Zhizong; Li, Jing; Wu, Zuliang; Gao, Erhao; Wang, Wei; Yao, Shuiliang

doi:10.1016/j.chemosphere.2021.131474

Cited by 9 publications

(4 citation statements)

References 42 publications

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“…The Au catalyst can improve not only VOCs removal performance but also reduce the emission of nanosized by-product particles [42]. Significant VOCs removal can be achieved by using a discharge reactor with a small amount of noble metal catalysts [43]. These research results give us the inspiration that noble metal catalysts can compensate for the shortcomings of plasma removal efficiency.…”

Section: Introductionmentioning

confidence: 79%

Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co₃O₄

DI,

XU,

YAO

et al. 2023

Plasma Sci. Technol.

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The plasma catalytic degradation of o-xylene in simulated air was improved by loading low amounts of Pt, Pd, or Au on Co3O4. At room temperature, o-xylene conversion of and COx selectivity using 0.1wt%Pt/Co3O4 catalyst reached 98.9% and 80%, and the energy efficiency was at the top level in comparison with literature values. A stable o-xylene degradation performance could be obtained by online regenerating the heat-insulated reactor with a high energy density. After characterization, it was found that the loading of nano-sized Pt not only increased the Co3+/Co2+ ratio, where Co3+ is benefit for the formation of reactive oxygen species, but also conduce Pt0 to oxygen activation, resulting in effective promotion of o-xylene complete oxidation. Operando plasma diffuse reflectance infrared Fourier transform spectroscopy demonstrated the o-xylene complete oxidation and proved that Pt played a key role in the complete oxidation of o-xylene.

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Section: Introductionmentioning

confidence: 79%

Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co₃O₄

DI,

XU,

YAO

et al. 2023

Plasma Sci. Technol.

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“…The catalytic performance of the honeycomb materials was basically associated with their S BET and pore size. 51 The material with a higher S BET could normally enlarge the contact area for reactant conversion. Loading Ni to the γ-Al 2 O 3 coated blank substrate slightly reduced the specific surface area but further promoted the energy efficiency and tar conversion, which indicates the core catalytic role of Ni species in the steam reforming reaction.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The addition of porous honeycomb materials in the GAD reactor prolonged the residence time of reactants for degradation, which enabled the toluene and naphthalene molecules more susceptible to being attacked by the plasma reactive species and enhanced their conversions. The catalytic performance of the honeycomb materials was basically associated with their S BET and pore size . The material with a higher S BET could normally enlarge the contact area for reactant conversion.…”

Section: Results and Discussionmentioning

confidence: 99%

Plasma-Catalytic Reforming of Naphthalene and Toluene as Biomass Tar over Honeycomb Catalysts in a Gliding Arc Reactor

Mei

Liu

Yanık

et al. 2022

ACS Sustainable Chem. Eng.

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Biomass gasification is a promising and sustainable process to produce renewable and CO 2 -neutral syngas (H 2 and CO). However, the contamination of syngas with tar is one of the major challenges to limit the deployment of biomass gasification on a commercial scale. Here, we propose a hybrid plasma-catalytic system for steam reforming of tar compounds over honeycomb-based catalysts in a gliding arc discharge (GAD) reactor. The reaction performances were evaluated using the blank substrate and coated catalytic materials (γ-Al 2 O 3 and Ni/γ-Al 2 O 3 ). Compared with the plasma alone process, introducing the honeycomb materials in GAD prolonged the residence time of reactant molecules for collision with plasma reactive species to promote their conversions. The presence of Ni/γ-Al 2 O 3 gave the best performance with the high conversion of toluene (86.3%) and naphthalene (75.5%) and yield of H 2 (35.0%) and CO (49.1%), while greatly inhibiting the formation of byproducts. The corresponding highest overall energy efficiency of 50.9 g/kWh was achieved, which was 35.4% higher than that in the plasma alone process. Characterization of the used catalyst and long-term running indicated that the honeycomb material coated with Ni/γ-Al 2 O 3 had strong carbon resistance and excellent stability. The superior catalytic performance of Ni/γ-Al 2 O 3 can be mainly ascribed to the large specific surface area and the in situ reduction of nickel oxide species in the reaction process, which promoted the interaction between plasma reactive species and catalysts and generated the plasma-catalysis synergy.

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“…The Au/CeO 2 / γ-Al 2 O 3 nanocatalysts also showed good humidity tolerance and excellent stability (18 h, 30% RH). Zhu et al obtained 100% toluene conversion in an IPC system over Au/γ-Al 2 O 3 (0.1 wt% Au loading) catalyst at a SED of 20 J•L −1 and a temperature of 257 °C (Zhu et al, 2021). They attributed the good catalytic activity to the small size and good dispersion of Au particles.…”

Section: Noble Metalsmentioning

confidence: 99%

A critical review on plasma-catalytic removal of VOCs: Catalyst development, process parameters and synergetic reaction mechanism

Tian

Wang

et al. 2022

Science of The Total Environment

107

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Evaluation of Au/γ-Al2O3 nanocatalyst for plasma-catalytic decomposition of toluene

Cited by 9 publications

References 42 publications

Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co₃O₄

Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co₃O₄

Plasma-Catalytic Reforming of Naphthalene and Toluene as Biomass Tar over Honeycomb Catalysts in a Gliding Arc Reactor

A critical review on plasma-catalytic removal of VOCs: Catalyst development, process parameters and synergetic reaction mechanism

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Evaluation of Au/γ-Al2O3 nanocatalyst for plasma-catalytic decomposition of toluene

Cited by 9 publications

References 42 publications

Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co3O4

Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co3O4

Plasma-Catalytic Reforming of Naphthalene and Toluene as Biomass Tar over Honeycomb Catalysts in a Gliding Arc Reactor

A critical review on plasma-catalytic removal of VOCs: Catalyst development, process parameters and synergetic reaction mechanism

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Product

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Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co₃O₄

Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co₃O₄