scholarly journals Ni-Pd-Al2O3 catalyst supported on reticulated ceramic foam for dry methane reforming

10.30544/133 ◽  
2015 ◽  
Vol 21 (1) ◽  
pp. 57-63
Author(s):  
Vesna Nikolić ◽  
Željko Kamberović ◽  
Marija Korać ◽  
Miroslav Sokić ◽  
Zoran Anđić ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Ceramic Foam ◽  
Methane Reforming ◽  
Salt Solutions ◽  
Metal Chlorides ◽  
Calcination Step ◽  
Α Al2o3 ◽  
Al2o3 Catalyst ◽  
Very Low Temperature

In the present study, Ni-Pd/Al2O3 catalyst supported on α-Al2O3 based foam was prepared and evaluated in the dry methane reforming process. Corresponding metal chlorides were deposited to the foam surface by impregnation of the foam with ultrasonically aerosolized salt solutions at 473 K and drying at that temperature. Calcination step was excluded and the catalyst was reduced at very low temperature – 533 K. The reforming experiment lasted for 3 h, with standing time of 1 h at the following temperatures: 873, 973 and 1023 K. Conclusions on selectivity, catalytic activity and stability were reached on the basis of CO and H2 yields.

scholarly journals Exploitation Properties of Ni-Pd/Al2O3 Catalyst Supported on Ceramic Foam

10.30544/74 ◽  
2015 ◽  
Vol 21 (4) ◽  
pp. 277-282
Author(s):  
Vesna Nikolić ◽  
Željko Kamberović ◽  
Zoran Anđić ◽  
Marija Korać ◽  
Miroslav Sokić ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Ceramic Foam ◽  
Methane Reforming ◽  
Standing Time ◽  
Α Al2o3 ◽  
Al2o3 Catalyst

The goal of this research was to examine exploitation properties of Ni-Pd/Al2O3 catalyst supported on α-Al2O3 based foam in the dry methane reforming. The catalyst was prepared by using aerosol method. Chloride precursors for Ni and Pd were reduced by hydrogen at low temperature of 533 K, without previous calcination. The reforming experiment was performed for 3 h, with standing time of 1 h for each of the following temperatures: 873, 973 and 1023 K. Conclusions on selectivity, catalytic activity and stability were made on the basis of CO and H2 yields.

A novel Pd3O9@α-Al2O3 catalyst under a hydroxylated effect: high activity in the CO oxidation reaction

2015 ◽  
Vol 17 (48) ◽  
pp. 32140-32148 ◽  
Author(s):  
Qiaohong Li ◽  
Yongqin Wei ◽  
Rongjian Sa ◽  
Zuju Ma ◽  
Kechen Wu
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
High Activity ◽  
Oxidation Reaction ◽  
Co Oxidation Reaction ◽  
Α Al2o3 ◽  
Al2o3 Catalyst

A new Pd3O9@α-Al2O3 catalyst has been designed which shows superior catalytic activity for CO oxidation.

scholarly journals A Comparison of the Efficiency of Catalysts Based on Ni, Ni-Co and Ni-Mo in Pressure Pyrolysis of Biomass Leading to Hythane

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1480
Author(s):  
Pavel Straka ◽  
Olga Bičáková ◽  
Tomáš Hlinčík
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Thermal Conversion ◽  
Hydrogen Atmosphere ◽  
Different Types ◽  
Secondary Reactions ◽  
Low Temperature Pyrolysis ◽  
Pyrolysis Of Biomass ◽  
Al2o3 Catalyst

A thermal conversion of biomass to hythane using catalysts was studied. Low-temperature pyrolysis of two different types of biomass was performed in a pressure sealed reactor, and the resulting gas with high contents of CO2 and CO was methanized in a hydrogen atmosphere at a pressure of 30 bar. As catalysts, Ni/Al2O3, NiCo/Al2O3 and NiMo/Al2O3 were used and their catalytic activity was evaluated. The NiCo/Al2O3 catalyst showed the highest catalytic activity, Ni/Al2O3 had a lower but comparable one, and NiMo/Al2O3 showed the lowest activity. The resulting hythane contained 70 vol.% CH4 and 10 vol.% H2 (with NiCo/Al2O3 catalyst, HHV 29.20 MJ/m3, LHV 26.32 MJ/m3), or 57 vol.% CH4 and 23 vol% H2 (with Ni/Al2O3, HHV 25.92 MJ/m3, LHV 23.21 MJ/m3) or 47 vol.% CH4 and 27 vol.% H2 (with NiMo/Al2O3, HHV 23.23 MJ/m3, LHV 20.76 MJ/m3). It has been found that secondary reactions of volatile biomass products are of great importance for successful pressure pyrolysis.

Bulk standards for low-temperature biological x-ray microanalysis

1984 ◽  
Vol 42 ◽  
pp. 282-283
Author(s):  
P. Echlin ◽  
M. McKoon ◽  
E.S. Taylor ◽  
C.E. Thomas ◽  
K.L. Maloney ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Analytical Method ◽  
Salt Solutions ◽  
Absolute Concentration ◽  
Cooling Process ◽  
X Ray ◽  
The Absolute ◽  
Analytical Procedures ◽  
Electrical Conductors

Although sections of frozen salt solutions have been used as standards for x-ray microanalysis, such solutions are less useful when analysed in the bulk form. They are poor thermal and electrical conductors and severe phase separation occurs during the cooling process. Following a suggestion by Whitecross et al we have made up a series of salt solutions containing a small amount of graphite to improve the sample conductivity. In addition, we have incorporated a polymer to ensure the formation of microcrystalline ice and a consequent homogenity of salt dispersion within the frozen matrix. The mixtures have been used to standardize the analytical procedures applied to frozen hydrated bulk specimens based on the peak/background analytical method and to measure the absolute concentration of elements in developing roots.

RESISTIVITY OF TmSe UNDER PRESSURE AT VERY LOW TEMPERATURE

1980 ◽  
Vol 41 (C5) ◽  
pp. C5-177-C5-180
Author(s):  
J. Flouquet ◽  
P. Haen ◽  
F. Holtzberg ◽  
F. Lapierre ◽  
J. M. Mignot ◽  
...  
Keyword(s):  
Low Temperature ◽  
Very Low Temperature

Can fluorosyl hydride be formed or even prepared?

1990 ◽  
Vol 55 (4) ◽  
pp. 890-895
Author(s):  
Rudolf Zahradník ◽  
B. Andes Hess
Keyword(s):  
Low Temperature ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Solid Matrix ◽  
Vibrational Characteristics ◽  
Very Low Temperature

HFO and HClO (fluorosyl and chlorosyl hydrides) and isomeric molecules HOF and HOCl (hypofluorous and hypochlorous acids) have been studied theoretically. On the basis of nonempiracal quantum chemical calculations (MP2, MP4 and CCD/6-311G**) geometry, energy and vibrational characteristics are analyzed and it is concluded that there is a poor chance to observe formation of HFO. Possibly, bombardment of HF in a solid matrix by 16O could lead at very low temperature to HFO.

scholarly journals Silver‐Promoted High‐Performance (Ag,Cu)(In,Ga)Se 2 Thin‐Film Solar Cells Grown at Very Low Temperature

Solar RRL ◽  
2021 ◽  
pp. 2100108
Author(s):  
Shih-Chi Yang ◽  
Jordi Sastre ◽  
Maximilian Krause ◽  
Xiaoxiao Sun ◽  
Ramis Hertwig ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Low Temperature ◽  
High Performance ◽  
Thin Film Solar Cells ◽  
Very Low Temperature
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