Catalytic performance and kinetics study of various carbonaceous supported nickel nanoparticles for atmospheric pressure competitive hydrogenation of benzene

2019 ◽  
Vol 715 ◽  
pp. 367-374 ◽  
Author(s):  
Z. Mohammadian ◽  
M.H. Peyrovi ◽  
N. Parsafard
Keyword(s):  
Atmospheric Pressure ◽  
Nickel Nanoparticles ◽  
Catalytic Performance ◽  
Kinetics Study ◽  
Competitive Hydrogenation

Nickel Nanoparticles Supported on CMK-3 with Enhanced Catalytic Performance for Hydrogenation of Carbonyl Compounds

2016 ◽  
Vol 2016 (21) ◽  
pp. 3469-3473 ◽  
Author(s):  
Daeho Kim ◽  
Hyuntae Kang ◽  
Hyesu Park ◽  
Sungkyun Park ◽  
Ji Chan Park ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Nickel Nanoparticles ◽  
Catalytic Performance

Effects of Cu and K Promoters on the Catalytic Performance of Iron-Based Nanocatalyst for Fischer-Tropsch Synthesis

2013 ◽  
Vol 832 ◽  
pp. 15-20 ◽  
Author(s):  
Sara Faiz Hanna Tasfy ◽  
Noor Asmawati Mohd Zabidi ◽  
Duvvuri Subbarao
Keyword(s):  
Atmospheric Pressure ◽  
Fixed Bed ◽  
Space Velocity ◽  
Catalytic Performance ◽  
Reactant Ratio ◽  
Impregnation Method ◽  
Fischer Tropsch ◽  
Heavy Hydrocarbons ◽  
Co Conversion ◽  
Iron Based

Iron-based nanocatalyst was prepared via impregnation method on SiO2 support. The effects of promoters, namely, K and Cu, on the physical properties and catalytic performance in FTS have been investigated. The FTS performance of the synthesized nanocatalysts was examined in a fixed-bed microreactor at temperature of 523K, atmospheric pressure, 1.5 reactant ratio (H2/CO) and space velocity of 3L/g-cat.h. In FTS reaction, Cu promoter resulted in a lower CO conversion and C5+ hydrocarbons selectivity but higher selectivity to the lighter hydrocarbons (C1-C4) comparedto those obtained using the K promoter. Higher CO conversion (28.9%) and C5+ hydrocarbons selectivity (54.4%) were obtained using K as a promoter compared to that of Cu promoter. However, the K-promoted nanocatalyst resulted in a lower CO conversion but higher selectivity of the heavy hydrocarbons (C5+) compared to those obtained using the un-promoted nanocatalyst.

MeAPO4 Berlinite as an Effective Catalyst for Mild Oxidation of Cyclohexane

2013 ◽  
Vol 709 ◽  
pp. 102-105 ◽  
Author(s):  
Da Lei Sun ◽  
Zi Sheng Chao
Keyword(s):  
Molecular Oxygen ◽  
Atmospheric Pressure ◽  
Molecular Sieve ◽  
Catalytic Performance ◽  
Synergic Effect ◽  
Mild Oxidation ◽  
Effective Catalyst ◽  
Ft Ir

Cobalt and/or manganese incorporated berlinites (CoMnAPO4) and aluminophosphate molecule sieve (CoMnAPO-5) were hydrothermally synthesized, characterized by XRD, FT-IR, XPS and SEM, and employed as catalysts in the oxidation of cyclohexane with molecular oxygen at 348 K under atmospheric pressure. It was found that the berlinite-based catalysts were more selective for the production of KA oil, stable during the reaction, but slightly less active for the conversion of cyclohexane, when compared to their molecular sieve counterparts. The CoMnAPO4exhibited a better catalytic performance, due to a synergic effect, than the CoAPO4or MnAPO4.

The Effect of Ni Precursor Salts on Diatomite Supported Ni-Mg Catalysts in Methanation of CO2

2021 ◽  
Vol 1016 ◽  
pp. 1417-1422
Author(s):  
Chao Sun ◽  
Jugoslav Krstic ◽  
Vojkan Radonjic ◽  
Miroslav Stankovic ◽  
Patrick da Costa
Keyword(s):  
Catalytic Activity ◽  
Atmospheric Pressure ◽  
Textural Properties ◽  
Catalytic Performance ◽  
Nickel Salt ◽  
Nitrate Salt ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
The Difference ◽  
Supported Ni

This study is aimed to investigate the effect of Ni precursor salts on the properties (textural, phase-structural, reducibility, and basicity), and catalytic performance of diatomite supported Ni-Mg catalyst in methanation of CO2. The NiMg/D-X catalysts derived from various nickel salts (X = S-sulfamate, N-nitrate or A-acetate) were synthesized by the precipitation-deposition (PD) method. The catalysts were characterized by N2-physisorption, XRD, TPR-H2, and TPD-CO2 techniques. The different catalytic activity (conversion) and selectivity, observed in CO2 methanation carried out under relatively mild conditions (atmospheric pressure; temperatures: 250-450 °C) are related and explained by the difference in textural properties, metallic Ni-crystallite size, reducibility, and basicity of studied catalysts. The results showed that catalyst derived from Ni-nitrate salt (NiMg/D-N) is more suitable for the preparation of efficient catalyst for CO2 methanation than its counterparts derived from sulfamate (NiMg/D-S) or acetate (NiMg/D-A) nickel salt. The NiMg/D-N catalyst showed the highest specific surface area and total basicity, and the best catalytic performance with CO2 conversion of 63.3 % and CH4 selectivity of 80.9 % at 450 °C.

Inactivation Kinetics Study of an Atmospheric-Pressure Cold-Plasma Jet Against Pathogenic Microorganisms

2012 ◽  
Vol 40 (11) ◽  
pp. 2879-2882 ◽  
Author(s):  
Parish P. Sedghizadeh ◽  
Meng-Tse Chen ◽  
Christoph Schaudinn ◽  
Amita Gorur ◽  
Chunqi Jiang
Keyword(s):  
Atmospheric Pressure ◽  
Cold Plasma ◽  
Plasma Jet ◽  
Inactivation Kinetics ◽  
Kinetics Study ◽  
Pathogenic Microorganisms

Ni nanoparticles supported on mesoporous silica (2D, 3D) architectures: highly efficient catalysts for the hydrocyclization of biomass-derived levulinic acid

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 57201-57210 ◽  
Author(s):  
Mohan Varkolu ◽  
Venkateshwarlu Velpula ◽  
Saidulu Ganji ◽  
David Raju Burri ◽  
Seetha Rama Rao Kamaraju
Keyword(s):  
Mesoporous Silica ◽  
Vapor Phase ◽  
Atmospheric Pressure ◽  
Levulinic Acid ◽  
Catalytic Performance ◽  
Mesoporous Silicas ◽  
Ni Nanoparticles ◽  
Highly Efficient

Ni nanoparticles supported on various mesoporous silicas with 2D (COK-12) and 3D architectures (KIT-6 and SBA-16) exhibited superior catalytic performance in the vapor-phase hydrocyclization of biomass-derived levulinic acid at atmospheric pressure.

Catalytic Reforming of Model Tar Compounds from Hot Coke Oven Gas over Pd Promoted Ni/Mg(Al)O Catalysts

2011 ◽  
Vol 197-198 ◽  
pp. 711-714 ◽  
Author(s):  
Hong Wei Cheng ◽  
Xiong Gang Lu ◽  
Wei Zhong Ding ◽  
Qing Dong Zhong
Keyword(s):  
Atmospheric Pressure ◽  
Bimetallic Catalyst ◽  
Coke Oven ◽  
Catalytic Performance ◽  
Molar Ratio ◽  
Coke Oven Gas ◽  
Catalytic Reforming ◽  
Catalytic Activities ◽  
Gas Molecules ◽  
Co Precipitation

Pd (0.1-1 wt%) loaded Ni/Mg(Al)O catalysts have been prepared by co-precipitation and impregnation methods, and their catalytic activities were tested in the catalytic reforming of tar components from hot coke oven gas (COG) with lower steam/carbon (S/C) molar ratio. The 0.5%Pd-12%Ni/Mg3(Al)O bimetallic catalyst derived from hydrotalcite showed excellent catalytic activity. The effect of reaction temperature on the catalytic performance was investigated in detail. Toluene could be completely converted into small gas molecules of CH4, CO and CO2 over the catalyst at S/C=0.42 and 600°C under atmospheric pressure.

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