Regeneration of C4H10 dry reforming catalyst by nonthermal plasma

Mok, Young Sun; Jwa, Eunjin; Hyun, Yu Jae

doi:10.1016/s2095-4956(13)60051-0

Cited by 15 publications

(10 citation statements)

References 30 publications

(18 reference statements)

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“…According to Sivachandiran et al, the surface of TiO 2 charged with isopropanol was fully regenerated by NTP using a fixed bed reactor [41]. This observation was also reported by Mok et al, in their comparison between plasma regeneration and thermal regeneration of a deactivated Ni/alumina catalyst [47].…”

Section: Regeneration and Reuse Of Sio 2 -Tio 2 -Gft Catalystmentioning

confidence: 55%

Indoor air treatment of refrigerated food chambers with synergetic association between cold plasma and photocatalysis: Process performance and photocatalytic poisoning

Zadi

Azizi

Nasrallah

et al. 2020

Chemical Engineering Journal

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The purpose of this study is to evaluate the efficiency of non-thermal plasma (NTP) and heterogeneous photocatalytic processes for indoor air treatment of refrigerated food chambers. Propionic acid and benzene were chosen as target pollutants to simulate odors inside a fridge. Firstly, the microstructure of the used catalyst was investigated by transmission electron microscopy (TEM). The influence of operating parameters such as pollutant concentration, type of system (mono-compound or bi-compound system), duration of photocatalytic degradation and relative humidity in the indoor air were investigated. Our findings show a synergetic effect between NTP and photocatalysis for malodors removal. Additionally, the mineralization of pollutant is directly controlled by the amount of ozone produced by the plasma discharge then it decomposes on the TiO 2-based catalytic surface. Our results highlight also the key role of the generated reactive oxygen species (hydroxyl radials and atomic oxygen) in (i) propionic acid and benzene removal, (ii) selectivity of CO 2 and CO, (iii) by-products formation such as ozone formation. Moreover, the recovery of the initial photocatalytic activity was explored in details. A significant poisoning occurred when photocatalysis was carried out alone for the degradation of propionic acid and benzene. Results confirm that NTP plasma enhanced the photocatalytic activity. We also showed the effect of NTP plasma on the regeneration of the photocatalytic surface.

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Section: Regeneration and Reuse Of Sio 2 -Tio 2 -Gft Catalystmentioning

confidence: 55%

Indoor air treatment of refrigerated food chambers with synergetic association between cold plasma and photocatalysis: Process performance and photocatalytic poisoning

Zadi

Azizi

Nasrallah

et al. 2020

Chemical Engineering Journal

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“…They showed that the plasma-assisted regeneration was an efficient method for oxidation of coked deposits. The dry reforming of the regenerated catalyst was as good as that of the fresh one [30].…”

Section: Introductionmentioning

confidence: 84%

“…Regarding to previous studies, the coke oxidation reactions in thermal regeneration process may be summarized as follows [30]:…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Improving Plasma Regeneration Conditions of Pt–Sn/Al2O3 in Naphtha Catalytic Reforming Process Using Atmospheric DBD Plasma System

Hafezkhiabani

Fathi

Shokri

2015

Plasma Chem Plasma Process

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The catalytic naphtha reforming is one of the largest processes of petroleum industry that is used to rebuild the low-octane hydrocarbons in the naphtha to more valuable high-octane gasoline called reformate without changing the boiling point range. An atmospheric pressure pin to plate dielectric barrier discharge (DBD) plasma was used to remove carbonaceous contaminant from the coked Pt-Sn/Al 2 O 3 catalysts during the naphtha reforming process. The effects of treatment time and flow ratios of O 2 /Ar and O 2 / He on the carbon content of the coked catalysts were investigated. The produced radicals and active species of the plasma process were identified by optical emission spectroscopy. To confirm removing the coke from the catalyst, thermal gravimetric/differential thermal analysis and temperature programmed oxidation analysis were done. Effects of treatment time and flow ratios of O 2 /Ar and O 2 /He on the carbon content of the coked catalysts were investigated by applying elemental analysis. The results of X-ray diffraction, X-ray fluorescence, Brunauer-Emmett-Teller, and CO adsorption showed that the structure and specifications of regenerated catalysts remained without significant changes during the plasma treating. The catalyst performance test revealed that DBD plasma regenerated catalysts increased the aromatic content of the feed as well as the fresh catalysts. The results showed that the plasma treatment method for regeneration of Pt-Sn/Al 2 O 3 can be applied at lower temperature and pressure relative to the thermal regeneration method.

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“…In general, the gas-phase non-equilibrium plasma technology includes dielectric barrier discharge (DBD), corona discharges, microwave (MW) discharge and gliding arc discharge (GAD). This promising technology has advantages of high energy density, mild reaction conditions, small-scale equipment, as well as the rapid response time, and has already been applied in many fields like material fabrication and surface treatment, [7][8][9] the decomposition of volatile organic compounds (VOCs), [10,11] direct conversion of simple hydrocarbons to high-value chemicals [12,13] as well as hydrocarbon fuel reforming. [14,15] It is also reported that the assistance of plasma can improve the performance of catalysts.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production via Partial Oxidation Reforming of Methane with Gliding Arc Discharge Plasma

Wang

Liu

et al. 2020

ChemistrySelect

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Hydrogen production from partial oxidation reforming of methane in a gliding arc discharge (GAD) reactor is investigated. The effects of input power, the oxygen-carbon molar ratio (O/C), and residence time are studied, respectively. Products such as H 2 , CO, CO 2 , and C 2-C 4 hydrocarbons can be detected in the outlet gas. The experimental result shows that the input power of 36.4 W, the relitively low O/C of 0.705 and the 13.8 s residence time in this system will bring the highest H 2 energy yield. Compared to the decomposition of methane, partial oxidation of methane with air can maintain a stable discharge state and no carbon deposition on electrodes is observed during the reaction process. Optical emission spectroscopy (OES) is also employed to characterize this methane-air plasma. Based on the results of the experiment and OES, a possible mechanism of methane partial oxidation process was proposed, which points out that collisions of high-energy electrons and excited N 2 species (mainly N 2 (A)) with other species (such as O 2 , CH 4) in the plasma region are two main ways for the activation of this reforming system. Hydrogen is generated principally through the H-abstraction reaction and the H-coupling reaction.

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Regeneration of C4H10 dry reforming catalyst by nonthermal plasma

Cited by 15 publications

References 30 publications

Indoor air treatment of refrigerated food chambers with synergetic association between cold plasma and photocatalysis: Process performance and photocatalytic poisoning

Indoor air treatment of refrigerated food chambers with synergetic association between cold plasma and photocatalysis: Process performance and photocatalytic poisoning

Improving Plasma Regeneration Conditions of Pt–Sn/Al2O3 in Naphtha Catalytic Reforming Process Using Atmospheric DBD Plasma System

Hydrogen Production via Partial Oxidation Reforming of Methane with Gliding Arc Discharge Plasma

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