Comparison of direct and indirect plasma oxidation of NO combined with oxidation by catalyst

Jõgi, Indrek; Stamate, Eugen; Irimiea, Cornélia; Schmidt, Michael; Brandenburg, Ronny; Hołub, Marcin; Bonislawski, Michal; Jakubowski, Tomasz; Kääriäinen, Marja-Leena; Cameron, D.C.

doi:10.1016/j.fuel.2014.12.025

Cited by 45 publications

(31 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plasma technology is a novel technique with the ability of producing an active medium for different applications such as NO oxidation [14], methane conversion [15], volatile organic compound (VOC) abatement [16], heavy oil upgrading [17], hydrogen production [18], regeneration of diesel particulate filter [19], catalyst assemble in a solution plasma process [20,21] and also catalyst regeneration at low temperatures and pressures [22,23]. In line with these applications, plasma technique can also be applied in catalyst regeneration at low temperature and pressure avoiding any internal destruction [24][25][26][27][28].…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

“…ESP is the device of choice for controlling particle emissions of many industrial applications. Ozone (O 3 ) is applied as a disinfectant and oxidant for water treatment, but it also plays a major role for plasma oxidation of NO [57] and particulate matter (PM) [58]. NTPs were utilized for treatment of volatile organic compounds (VOCs) as well as short-and long-chained hydrocarbons [59,60].…”

Section: Environmental Applicationsmentioning

confidence: 99%

“…Most of the presented studies on pollutants removal using NTP were conducted on laboratory-scale test benches, many of them using synthetic flue gas [57,59,60,74]. According to these publications, energy consumption and cost of the plasma generation are the main challenges of using NTP for pollutant removal [74].…”

Section: Plasma Utilization For Pollutant Removal In Flue Gasmentioning

confidence: 99%

Overview of Electric Field Applications in Energy and Process Engineering

Zigan

2018

Energies

View full text Add to dashboard Cite

Heat and mass transfer as well as chemical reactions in technical processes can be enhanced by using electric fields. This paper provides an overview of current fundamental and applied research as well as potential technical applications of electric fields in energy and process engineering. This includes electrosprays, technical combustors as well as electrochemical reforming and plasma gasification of waste or biomass. Other emerging fields are plasma technologies for treatment of water, surfaces and gases including flue gases. In particle or aerosol-laden flows, plasmas are used to promote particle nucleation and surface growth for controlled nanomaterial synthesis. Furthermore, non-invasive diagnostics based on electromagnetic fields and electric fluid properties are relevant techniques for online control and optimization of technical processes. Finally, an overview of laser-based techniques is provided for studying electro-hydrodynamic effects, temperature, and species concentrations in plasma and electric-field enhanced processes.

show abstract

“…The concentration of ozone is proportional to the applied voltage (discharge power). At unreasonably high discharge power, NO2 can be further oxidized to NO3 and N2O5 [31,32]. Thus, the discharge power should be limited to avoid ozone slip and further oxidation of NO2 to NO3 and N2O5.…”

Section: Effect Of No2 Fraction On the Catalytic Reduction Of Noxmentioning

confidence: 99%

Consideration of the Role of Plasma in a Plasma-Coupled Selective Catalytic Reduction of Nitrogen Oxides with a Hydrocarbon Reducing Agent

Lee

Kang

et al. 2017

Catalysts

View full text Add to dashboard Cite

Abstract:The purpose of this study is to explain how plasma improves the performance of selective catalytic reduction (SCR) of nitrogen oxides (NO x ) with a hydrocarbon reducing agent. In the plasma-coupled SCR process, NO x reduction was performed with n-heptane as a reducing agent over Ag/γ-Al 2 O 3 as a catalyst. We found that the plasma decomposes n-heptane into several oxygen-containing products such as acetaldehyde, propionaldehyde and butyraldehyde, which are more reactive than the parent molecule n-heptane in the SCR process. Separate sets of experiments using acetaldehyde, propionaldehyde and butyraldehyde, one by one, as a reductant in the absence of plasma, have clearly shown that the presence of these partially oxidized compounds greatly enhanced the NO x conversion. The higher the discharge voltage, the more the amounts of such partially oxidized products. The oxidative species produced by the plasma easily converted NO into NO 2 , but the increase of the NO 2 fraction was found to decrease the NO x conversion. Consequently, it can be concluded that the main role of plasma in the SCR process is to produce partially oxidized compounds (aldehydes), having better reducing power. The catalyst-alone NO x removal efficiency with n-heptane at 250 • C was measured to be less than 8%, but it increased to 99% in the presence of acetaldehyde at the same temperature. The NO x removal efficiency with the aldehyde reducing agent was higher as the number of carbons in the aldehyde was more; for example, the NO x removal efficiencies at 200 • C with butyraldehyde, propionaldehyde and acetaldehyde were measured to be 83.5%, 58.0% and 61.5%, respectively, which were far above the value (3%) obtained with n-heptane.

show abstract

Comparison of direct and indirect plasma oxidation of NO combined with oxidation by catalyst

Cited by 45 publications

References 42 publications

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

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

Overview of Electric Field Applications in Energy and Process Engineering

Consideration of the Role of Plasma in a Plasma-Coupled Selective Catalytic Reduction of Nitrogen Oxides with a Hydrocarbon Reducing Agent

Contact Info

Product

Resources

About