Non-Thermal Plasma Assisted Catalytic Oxidation NO over Mn-Ni-Ox Catalysts at Low-Temperature

2011 ◽  
Vol 383-390 ◽  
pp. 3092-3098 ◽  
Author(s):  
Kai Li ◽  
Xiao Long Tang ◽  
Hong Hong Yi ◽  
Ping Ning ◽  
Zhi Qing Ye ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Oxidation ◽  
Thermal Plasma ◽  
Space Velocity ◽  
Input Voltage ◽  
No Oxidation ◽  
Precipitation Method ◽  
Non Thermal Plasma ◽  
High Space ◽  
Co Precipitation

Mn-Ni-Ox catalyst was prepared by the co-precipitation method. The most active catalysts were obtained with a molar Ni/ (Mn+Ni) ratio of 0.1. The results showed that over this catalyst, NO oxidation conversion reached 59% at 125°C and 50% at 150°C with a high space velocity of 35000h-1. Their surface properties were evaluated by means of scanning electron microscopy (SEM). The process of non-thermal plasma-assisted catalytic oxidation of NO under low-temperature was studied. And the NO conversion could reach 80% with the non-thermal plasma-assisting at 150°C when the input voltage was 30V. The increasing activities at low temperature（50~175°C）were more apparently higher than high temperature by plasma. And the low-temperature catalytic activity of the catalyst was increased with the increase of the input voltage.

Non-Thermal Plasma Assisted Catalytic Oxidation NO over Mn-Co-Ox Catalysts at Low-Temperature

2010 ◽  
Vol 160-162 ◽  
pp. 336-341 ◽  
Author(s):  
Kai Li ◽  
Xiao Long Tang ◽  
Hong Hong Yi ◽  
Ping Ning ◽  
Zhi Qing Ye ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Oxidation ◽  
Thermal Plasma ◽  
Space Velocity ◽  
Input Voltage ◽  
No Oxidation ◽  
Precipitation Method ◽  
Non Thermal Plasma ◽  
High Space ◽  
Co Precipitation

Mn-Co-Ox catalyst was prepared by the co-precipitation method. The most active catalysts were obtained with a molar Co/(Mn+Co) ratio of 0.1. The results showed that over this catalyst, NO oxidation conversion reached 56% at 150°C and 59% at 175°C with a high space velocity of 35000h-1. Their surface properties were evaluated by means of scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The process of Non-thermal plasma-assisted catalytic oxidation of NO under low-temperature was studied. And the NO conversion could reach 71% with the Non-thermal plasma-assisting at 125°C when the input voltage was 30V. The increasing activities at low temperature (50-150°C) were more apparently higher than high temperature by plasma. And the low-temperature catalytic activity of the catalyst was increased with the increase of the input voltage.

Effect of SO2 on Mn-Mg-Ox Catalyst Treated by Non-Thermal Plasma for NO Catalytic Oxidation

2014 ◽  
Vol 989-994 ◽  
pp. 490-493
Author(s):  
Rui Yun Lai ◽  
Xiao Long Tang ◽  
Hong Hong Yi ◽  
Kai Li ◽  
Ying Xiang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Catalytic Oxidation ◽  
Thermal Plasma ◽  
Active Site ◽  
Competitive Adsorption ◽  
Temperature Range ◽  
Catalytic Active Site ◽  
Ft Ir ◽  
Non Thermal Plasma

The effect of MgO addition on SO2tolerance of MnOxfor the NO catalytic oxidation was investigated in this work. MgO addition significantly promotes the SO2resistance of MnOxat low temperature range of 50–250°C. The slight decrease in catalytic activity over Mn-Mg-Oxexposure to SO2is attributed to the partially deactivation of the catalytic active site poisoned by SO2. Through XRD and FT-IR characterization, MgO may effectively inhibit the competitive adsorption between NOxand SO2in manganese site, and enhance SO2adsorption on the magnesia surface.

Effect of Fe and Co promoters on CO methanation activity of nickel catalyst prepared by impregnation – co-precipitation method

2020 ◽  
Vol 18 (5-6) ◽  
Author(s):  
Buyan-Ulzii Battulga ◽  
Tungalagtamir Bold ◽  
Enkhsaruul Byambajav
Keyword(s):  
Synergetic Effect ◽  
Space Velocity ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Alumina Support ◽  
Co Methanation ◽  
Temperature Range ◽  
Co Precipitation ◽  
Catalyst Distribution

AbstractNi based catalysts supported on γ-Al2O3 that was unpromoted (Ni/γAl2O3) or promoted (Ni–Fe/γAl2O3, Ni–Co/γAl2O3, and Ni–Fe–Co/γAl2O3) were prepared using by the impregnation – co-precipitation method. Their catalytic performances for CO methanation were studied at 3 atm with a weight hourly space velocity (WHSV) of 3000 ml/g/h of syngas with a molar ratio of H2/CO = 3 and in the temperature range between 130 and 350 °C. All promoters could improve nickel distribution, and decreased its particle sizes. It was found that the Ni–Co/γAl2O3 catalyst showed the highest catalytic performance for CO methanation in a low temperature range (<250 °C). The temperatures for the 20% CO conversion over Ni–Co/γAl2O3, Ni–Fe/γAl2O3, Ni–Fe–Co/γAl2O3 and Ni/γAl2O3 catalysts were 205, 253, 263 and 270 °C, respectively. The improved catalyst distribution by the addition of cobalt promoter caused the formation of β type nickel species which had an appropriate interacting strength with alumina support in the Ni–Co/γAl2O3. Though an addition of iron promoter improved catalyst distribution, the methane selectivity was lowered due to acceleration of both CO methanation and WGS reaction with the Ni–Fe/γAl2O3. Moreover, it was found that there was no synergetic effect from the binary Fe–Co promotors in the Ni–Fe–Co/γAl2O3 on catalytic activity for CO methanation.

Catalytic oxidation of toluene in air using manganese incorporated catalyst by non-thermal plasma system

2021 ◽  
Vol 257 ◽  
pp. 117973
Author(s):  
Xiao Zhang ◽  
Bin Ren ◽  
Yanhua Xu ◽  
Xi Li ◽  
Peng Yu ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Thermal Plasma ◽  
Plasma System ◽  
Non Thermal Plasma

Low temperature radical initiated hydrosilylation of silicon quantum dots

2020 ◽  
Vol 222 ◽  
pp. 190-200
Author(s):  
Timothy T. Koh ◽  
Tingting Huang ◽  
Joseph Schwan ◽  
Pan Xia ◽  
Sean T. Roberts ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Low Temperature ◽  
Thermal Plasma ◽  
Silicon Quantum Dots ◽  
Radical Initiator ◽  
Non Thermal Plasma

Non-thermal plasma synthesized silicon QDs are functionalized with aromatic and aliphatic ligands using a 2,2′-azobis(2-methylpropionitrile) AIBN radical initiator with hydrosilylation at 60 °C for photon upconversion.

Insulating Material Erosion in Atmospheric Non-Thermal Plasma Jet Device

2016 ◽  
Vol 3 (3) ◽  
pp. 663 ◽  
Author(s):  
Kamal M Ahmed ◽  
Tarek M Allam ◽  
Mohamed Anwar Abouelatta ◽  
Sayed A Ward ◽  
Ahmed A Lashin ◽  
...  
Keyword(s):  
Thermal Plasma ◽  
Operation Time ◽  
Plasma Jet ◽  
Input Voltage ◽  
Nitrogen Gas ◽  
Insulating Material ◽  
Thermal Plasma Jet ◽  
Material Erosion ◽  
Erosion Area ◽  
Non Thermal Plasma

This paper reports on the selection of insulating material types in a developed atmospheric-pressure non-thermal plasma jet (ANPJ-II) device which was operated previously in our laboratory based on the minimum erosion area of the insulator’s nozzle. Three identical insulator groups used in our experiment include; Teflon insulator material with different thicknesses of 1.5 mm and 2 mm respectively, and Ceramic insulating material with thickness of 2 mm. ANPJ-II device is operated with each of the three insulator groups. These insulators are operated and analyzed with different operation times for compressed Air or Nitrogen gas with a flow rate of 12 L/min and input voltage of 6 kV.  The erosion area of these insulator materials is measured as a function of the operation time. The Ceramic insulator was found to have the minimum erosion area. Also, the temperature of both the cathode and the insulating material (Teflon or Ceramic) are measured to study the effect of operation time and the gas type on the device components.

scholarly journals Catalytic oxidation of NO over MnOx–CoOx/TiO2 in the presence of a low ratio of O3/NO: activity and mechanism

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24493-24506
Author(s):  
Meng Si ◽  
Boxiong Shen ◽  
Lijun Liu ◽  
Haohao Zhang ◽  
Wenjun Zhou ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Oxidation ◽  
No Oxidation ◽  
Oxidation Of No

O3 promotes the formation of monodentate nitrates at low temperature, thus improving the efficiency of NO oxidation.

Sign in / Sign up

Export Citation Format

Share Document