scholarly journals THE FEASIBILITY OF DIRECT GAS-PHASE CONVERSION OF UF$sub 6$ TO UC

1963 ◽  
Author(s):  
R. G. Wymer ◽  
O. C. Dean
Keyword(s):  
Gas Phase ◽  
Phase Conversion

Ce and Ca/Nb doped Pd-mesocellular foam catalysts for gas-phase conversion of acetone to methyl isobutyl ketone

2021 ◽  
pp. 111169
Author(s):  
Kalina Grzelak ◽  
Rouzana Pulikkal Thumbayil ◽  
Søren Kegnæs ◽  
Maciej Trejda ◽  
Anders Riisager
Keyword(s):  
Gas Phase ◽  
Methyl Isobutyl Ketone ◽  
Phase Conversion ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone

scholarly journals Numerical analysis of pulverized biomass combustion

2021 ◽  
Vol 321 ◽  
pp. 01001
Author(s):  
Cansu Deniz Canal ◽  
Erhan Böke ◽  
Ali Cemal Benim
Keyword(s):  
Gas Phase ◽  
Radiative Heat ◽  
Particle Dispersion ◽  
Single Step ◽  
Biomass Combustion ◽  
Phase Conversion ◽  
Two Phase ◽  
Dissipation Model ◽  
Turbulent Particle Dispersion ◽  
Step Mechanism

Combustion of pulverized biomass in a laboratory swirl burner is computationally investigated. The two-phase flow is modelled by an Eulerian-Lagrangian approach. The particle size distribution and turbulent particle dispersion are considered. The radiative heat transfer is modelled by the P1 method. For modelling turbulence, different RANS modelling approaches are applied. The pyrolysis of the solid fuel is modelled by a single step mechanism. For the combustion of the volatiles a two-step reaction mechanism is applied. The gas-phase conversion rate is modelled by the Eddy Dissipation Model, combined with kinetics control. The results are compared with measurements.

ZnS/ZnO@CNT and ZnS@CNT nanocomposites by gas phase conversion of ZnO@CNT. A systematic study of their photocatalytic properties

2017 ◽  
Vol 46 (16) ◽  
pp. 5189-5201 ◽  
Author(s):  
Sherif Okeil ◽  
Jan Krausmann ◽  
Inga Dönges ◽  
Sandra Pfleger ◽  
Jörg Engstler ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gas Phase ◽  
Systematic Study ◽  
Atomic Layer ◽  
Phase Conversion ◽  
Zns Nanoparticles ◽  
Vertically Aligned Carbon Nanotubes ◽  
Layer Deposition ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

ZnS nanoparticles have been synthesized on vertically aligned carbon nanotubes by gas-phase conversion of ZnO nanoparticles which have been tethered on vertically aligned carbon nanotubes using atomic layer deposition (ALD).

scholarly journals Gas-phase conversion of glycerol to allyl alcohol over vanadium-supported zeolite beta

2019 ◽  
Vol 127 ◽  
pp. 20-24 ◽  
Author(s):  
Ruben Almeida ◽  
M. Filipa Ribeiro ◽  
Auguste Fernandes ◽  
João P. Lourenço
Keyword(s):  
Gas Phase ◽  
Allyl Alcohol ◽  
Zeolite Beta ◽  
Phase Conversion

Thermodynamic appraisal of the gas phase conversion of ethylene or ethanol to propylene

2014 ◽  
Vol 242 ◽  
pp. 422-432 ◽  
Author(s):  
Tino Lehmann ◽  
Andreas Seidel-Morgenstern
Keyword(s):  
Gas Phase ◽  
Phase Conversion

Gas phase conversion of chlorobenzene over supported rhodium catalysts

1985 ◽  
Vol 27 (1) ◽  
pp. 157-161 ◽  
Author(s):  
B. Coq ◽  
G. Ferrat ◽  
F. Figueras
Keyword(s):  
Gas Phase ◽  
Rhodium Catalysts ◽  
Phase Conversion

Heterogeneous catalysts for gas-phase conversion of ethylene to higher olefins

2018 ◽  
Vol 34 (5) ◽  
pp. 595-655 ◽  
Author(s):  
Mohammad Ghashghaee
Keyword(s):  
Gas Phase ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Supply And Demand ◽  
Value Added ◽  
Direct Conversion ◽  
Operating Conditions ◽  
Light Olefins ◽  
Phase Conversion ◽  
Natural Gas Reservoirs

Abstract The reduced availability of propylene and C4 products from steam crackers continues to provoke on-purpose technologies for light olefins such that almost 30% of propylene in 2025 is predicted to be supplied from unconventional sources. Furthermore, the recent discoveries of natural gas reservoirs have urged interest in the conversion of surplus alkanes and alkenes, especially ethane and ethylene. The direct conversion of ethylene to propylene or a combination of value-added chemicals, including butylenes and oligomers in the range of gasoline and diesel fuel, provides the capability of responding to the fluctuations in the balance between supply and demand of the main petrochemicals. A comprehensive review of heterogeneous catalysts for the gas-phase conversion pathways is presented here in terms of catalytic performances (ethylene conversion and product selectivities), productivities, lifetimes, active sites, physicochemical properties, mechanisms, influence of operating conditions, deactivation and some unresolved/less-advanced aspects of the field. The addressed catalysts cover both zeolitic materials and transition metals, such as tungsten, molybdenum, rhenium and nickel. Efforts in both experimental and theoretical studies are taken into account. Aside from the potential fields of progress, the review reveals very promising performances for the emerging technologies to produce propylene, a mixture of propylene and butenes, or a liquid fuel from ethylene.

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