scholarly journals Carbon Dioxide Hydrogenation by Means of Plasmonic Resonance Activation in Silica Aerogel Media

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2134 ◽  
Author(s):  
Sergio Muñoz ◽  
Alexander Navarrete ◽  
Ángel Martín ◽  
Roland Dittmeyer ◽  
M. Cocero
Keyword(s):  
Carbon Dioxide ◽  
Gas Phase ◽  
High Pressures ◽  
Copper Catalysts ◽  
Hydrogenation Reaction ◽  
Gas Phase Reactions ◽  
Conversion Rates ◽  
High Temperature Processes ◽  
Carbon Dioxide Hydrogenation ◽  
Reactor Temperature

Surface Plasmon Resonance can be used to activate zinc oxide/copper catalysts in order to perform the carbon dioxide hydrogenation reaction by means of light energy, avoiding high-temperature processes. The synthesis and impregnation methods have been designed to fill glass microreactors with ZnO/Cu nanoparticles supported on transparent silica aerogels to maximize the light absorbed by the catalyst. A LED device surrounding the glass microreactors provided white light to activate the catalyst homogeneously throughout the reactor. Temperature, pressure, amount of catalyst and gases flow were studied as possible variables to enhance the process trying to maximize CO2 conversion rates, achieving the best results working at high pressures. The use of transparent SiO2 Aerogels as supports for photocatalytic gas phase reactions even under high-pressure conditions is demonstrated.

Carbon dioxide reduction on Ir(111): stable hydrocarbon surface species at near-ambient pressure

2016 ◽  
Vol 18 (9) ◽  
pp. 6763-6772 ◽  
Author(s):  
Manuel Corva ◽  
Zhijing Feng ◽  
Carlo Dri ◽  
Federico Salvador ◽  
Paolo Bertoch ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ambient Pressure ◽  
Carbon Dioxide Reduction ◽  
Hydrogenation Reaction ◽  
Surface Species ◽  
Carbon Dioxide Hydrogenation

Stable hydrocarbon surface species in the carbon dioxide hydrogenation reaction were identified on Ir(111) under near-ambient pressure conditions.

ChemInform Abstract: GAS PHASE REACTIONS OF ANIONS WITH NITROUS OXIDE AND CARBON DIOXIDE

1977 ◽  
Vol 8 (47) ◽  
pp. no-no
Author(s):  
V. M. BIERBAUM ◽  
C. H. DEPUY ◽  
R. H. SHAPIRO
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Gas Phase ◽  
Gas Phase Reactions

Gas-Phase Reactions of Carbon Dioxide with Copper Hydride Anions Cu2H2–: Temperature-Dependent Transformation

2018 ◽  
Vol 122 (34) ◽  
pp. 19379-19384 ◽  
Author(s):  
Yun-Zhu Liu ◽  
Li-Xue Jiang ◽  
Xiao-Na Li ◽  
Li-Na Wang ◽  
Jiao-Jiao Chen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Phase ◽  
Copper Hydride ◽  
Gas Phase Reactions ◽  
Temperature Dependent

Nb2BN2− cluster anions reduce four carbon dioxide molecules: reactivity enhancement by ligands

2020 ◽  
Vol 49 (40) ◽  
pp. 14081-14087 ◽  
Author(s):  
Hai-Yan Zhou ◽  
Ming Wang ◽  
Yong-Qi Ding ◽  
Jia-Bi Ma
Keyword(s):  
Mass Spectrometry ◽  
Carbon Dioxide ◽  
Density Functional Theory ◽  
Gas Phase ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Cluster Anions ◽  
Gas Phase Reactions ◽  
Functional Theory ◽  
Flight Mass Spectrometry

The thermal gas-phase reactions of Nb2BN2− cluster anions with carbon dioxide have been explored by using the art of time-of-flight mass spectrometry and density functional theory calculations.

scholarly journals Influence of Particle Size, Reactor Temperature and Gas Phase Reactions on Fast Pyrolysis of Beech Wood

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Li Chen ◽  
Capucine Dupont ◽  
Sylvain Salvador ◽  
Guillaume Boissonnet ◽  
Daniel Schweich
Keyword(s):  
Particle Size ◽  
Gas Phase ◽  
Residence Time ◽  
Beech Wood ◽  
Tubular Reactor ◽  
Gaseous Product ◽  
Drop Tube ◽  
Gas Phase Reactions ◽  
Molar Ratios ◽  
Reactor Temperature

In the present work, a drop tube reactor (DTR) and a horizontal tubular reactor (HTR) were used to study the pyrolysis behaviour of beech wood particles of different sizes under the conditions encountered in industrial fluidized bed gasifiers, namely high external heat flux (105 – 106 W.m-2) and high temperature (800 – 1000°C). The influence of the reactor temperature (800 and 950°C), of particle size (from 350 µm to 6 mm), and of gas residence time (from 1 to 10 s) were examined. Under the explored conditions, when pyrolysis is finished, more than 80 wt.% of virgin wood is converted into gas and less than 13 wt.% remains in solid. In the gas phase, CO is the main gaseous product (50 wt.% of virgin wood), followed by H2 (molar ratios of H2/CO are between 0.35 to 0.55), H2O, CO2 and CH4. Species C2H2, C2H4, C2H6 and C6H6 are present in much lower amounts. The increase of temperature increases the rate of solid devolatilization and favours the cracking reactions of hydrocarbons. The increase of particle size increases the required time for completing pyrolysis. Meanwhile, the results obtained at 950°C show that the final products distribution at the end of pyrolysis is almost the same for the particles between 350 and 800 µm. The increase of the particle size from 800 µm to 6 mm seems to have some influence on the final products distribution. The gas phase reactions mainly change the yields of light hydrocarbons and H2: the increase of gas residence time favours the cracking reactions of hydrocarbons and thus leads to a higher H2 yield.

Bimetallic Ni-Mo Nitride as the Carbon Dioxide Hydrogenation Catalyst

2013 ◽  
Vol 872 ◽  
pp. 3-9 ◽  
Author(s):  
Denis V. Leybo ◽  
Natalia I. Kosova ◽  
Konstantin O. Chuprunov ◽  
Denis V. Kuznetsov ◽  
Irina A. Kurzina
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Scanning Electron Microscopy ◽  
Contact Time ◽  
Nitrogen Adsorption ◽  
Hydrogenation Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon Dioxide Hydrogenation ◽  
Scanning Electron

The possibility of bimetallic Ni-Mo nitrides usage as the catalysts in carbon dioxide hydrogenation reaction was examined in this work. Powders were synthesized through thermo-programmed reduction of precursor, which was produced by evaporation of the metal-containing solution. Specimens were investigated by x-ray diffraction, thermogravimetry, low-temperature nitrogen adsorption and scanning electron microscopy. It is shown that final powders provide CO2 conversion of 29 % for contact time of 0.26 s.

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