Plasma-assisted reduction of supported metal catalyst using atmospheric dielectric-barrier discharge

Kim, Seung-Soo; Lee, Hwaung; Na, Byung-Ki; Song, Hyung Keun

doi:10.1016/j.cattod.2003.11.026

Cited by 72 publications

(38 citation statements)

References 16 publications

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“…All experiments were carried out by introducing methane (CH 4 , purity > 99.99%) to the reactor at room temperature and atmospheric pressure. The gas flow rate was controlled by a calibrated mass flow controller (Milipore, model FC-280SAV).…”

Section: Methodsmentioning

confidence: 99%

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A Brief Catalyst Study on Direct Methane Conversion Using a Dielectric Barrier Discharge

Indarto

Choi

Lee

et al. 2007

J Chinese Chemical Soc

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A series of metal catalysts was used for methane conversion to higher hydrocarbons and hydrogen in a dielectric barrier discharge. The main goal of this study is to identify the metal catalyst components which can influence the reactions in room-temperature plasma conditions. The catalysts supported by g-Al 2 O 3 and zeolite (ZSM 5x) were prepared by the incipient wetness method with solutions containing the metal ions of the second component. Among the catalysts tested, only Pt and Fe catalysts showed a unique result of catalytic reaction in a reactor bed packed with glass beads.

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Section: Methodsmentioning

confidence: 99%

“…plasma. [3][4][5] However, different plasma conditions in each experiment make it difficult to confirm and compare the real activity of the catalysts on the reactions. In order to overcome this problem, a comprehensive study was done by comparing the catalyst activity in the same plasma system.…”

Section: Introductionmentioning

confidence: 99%

A Brief Catalyst Study on Direct Methane Conversion Using a Dielectric Barrier Discharge

Indarto

Choi

Lee

et al. 2007

J Chinese Chemical Soc

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“…The larger surface area of catalyst would produce higher adsorption capacity of reactant molecules providing more adsorption sites. In hybrid catalytic-plasma reactor system, the catalyst was directly in contact with energetic electrons within discharge zone generating reactive species (free radicals, excited atoms, molecules and ions) within plasma discharge zone and pores of the catalyst [16,35,36]. The formation of reactive species in the discharge zone and the pores of the catalyst would increase reaction activity between the adsorbed reactants on the catalyst surface and the active species which in turn forms FAME product.…”

Section: Effects Of Catalyst Diameter On Reactor Performancementioning

confidence: 99%

Effects of Weight Hourly Space Velocity and Catalyst Diameter on Performance of Hybrid Catalytic-Plasma Reactor for Biodiesel Synthesis over Sulphated Zinc Oxide Acid Catalyst

Buchori

Istadi

Purwanto

2017

Bull. Chem. React. Eng. Catal.

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Biodiesel synthesis through transesterification of soybean oil with methanol on hybrid catalytic-plasma reactor over sulphated zinc oxide (SO4 2-/ZnO) active acid catalyst was investigated. This research was aimed to study effects of Weight Hourly Space Velocity (WHSV) and the catalyst diameter on performance of the hybrid catalytic-plasma reactor for biodiesel synthesis. The amount (20.2 g) of active sulphated zinc oxide solid acid catalysts was loaded into discharge zone of the reactor. The WHSV and the catalyst diameter were varied between 1.55 to 1.546 min -1 and 3, 5, and 7 mm, respectively. The molar ratio of methanol to oil as reactants of 15:1 is fed to the reactor, while operating condition of the reactor was kept at reaction temperature of 65 o C and ambient pressure. The fatty acid methyl ester (FAME) component in biodiesel product was identified by Gas Chromatography -Mass Spectrometry (GC-MS). The results showed that the FAME yield decreases with increasing WHSV. It was found that the optimum FAME yield was achieved of 56.91 % at WHSV of 0.895 min -1 and catalyst diameter of 5 mm and reaction time of 1.25 min. It can be concluded that the biodiesel synthesis using the hybrid catalytic-plasma reactor system exhibited promising the FAME yield.

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“…The hybrid catalytic -Dielectric Barrier Discharge (DBD) plasma reactor is very promising because of high conversion rates, shorter reaction time, and more efficient power requirement [31]. Meanwhile, the catalyst placed in the discharge zone is an alternative solution to improve the selectivity of reaction to produce biodiesel [32]. The use of hybrid catalytic-plasma system in the synthesis of biodiesel is expected to generate significant syner-gies between the plasma and the catalysis in influencing the reactions condition and biodiesel selectivity.…”

Section: Roles Of Plasma Reactormentioning

confidence: 99%

“…The phenomenon probably triggers excitation of electrons pairs of reactants molecules from the ground state to the outer stationary states. This excitation will lower binding energy of the reactants so that termination of the bonding chain becomes easier [32][33][34][35]. In the hybrid catalytic-plasma process, active species (high energetic electrons, metastable compounds, free radicals) are not only formed around the plasma discharge zone, but also in pores of the catalyst due to direct contact between the plasma and the catalyst [36].…”

Section: Effect Of Plasma Treatment On Transesterification Reaction Pmentioning

confidence: 99%

Preliminary Testing of Hybrid Catalytic-Plasma Reactor for Biodiesel Production Using Modified-Carbon Catalyst

Buchori

Istadi

Purwanto

et al. 2016

Bull. Chem. React. Eng. Catal.

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Preliminary testing of hybrid catalytic-plasma reactor for biodiesel production through transesterification of soybean oil with methanol over modified-carbon catalyst was investigated. This research focused on synergetic roles of non-thermal plasma and catalysis in the transesterification process. The amount of modified-carbon catalyst with grain size of 1.75 mm was placed into fixed tubular reactor within discharge zone. The discharge zone of the hybrid catalytic-plasma reactor was defined in the volume area between high voltage and ground electrodes. Weight Hourly Space Velocity (WHSV) of 1.85 h -1 of reactant feed was studied at reaction temperature of 65 o C and at ambient pressure. The modified-carbon catalyst was prepared by impregnation of active carbon within H2SO4 solution followed by drying at 100 o C for overnight and calcining at 300 o C for 3 h. It was found that biodiesel yield obtained using the hybrid catalytic-plasma reactor was 92.39% and 73.91% when using active carbon and modified-carbon catalysts, respectively better than without plasma. Therefore, there were synergetic effects of non-thermal plasma and catalysis roles for driving the transesterification process. Copyright

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Plasma-assisted reduction of supported metal catalyst using atmospheric dielectric-barrier discharge

Cited by 72 publications

References 16 publications

A Brief Catalyst Study on Direct Methane Conversion Using a Dielectric Barrier Discharge

A Brief Catalyst Study on Direct Methane Conversion Using a Dielectric Barrier Discharge

Effects of Weight Hourly Space Velocity and Catalyst Diameter on Performance of Hybrid Catalytic-Plasma Reactor for Biodiesel Synthesis over Sulphated Zinc Oxide Acid Catalyst

Preliminary Testing of Hybrid Catalytic-Plasma Reactor for Biodiesel Production Using Modified-Carbon Catalyst

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