scholarly journals Mesoporous MEL, BEA, and FAU zeolite crystals obtained by in situ formation of carbon template over metal nanoparticles

2016 ◽  
Vol 40 (5) ◽  
pp. 4223-4227 ◽  
Author(s):  
Jacob Oskar Abildstrøm ◽  
Zahra Nasrudin Ali ◽  
Uffe Vie Mentzel ◽  
Jerrik Mielby ◽  
Søren Kegnæs ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Templating Method ◽  
Fau Zeolite ◽  
Carbon Template ◽  
In Situ Formation ◽  
Zeolite Crystals

Highly crystalline zeolites with intracrystalline mesopores are synthesized through a straightforward and feasible templating method.

In-situ formed Co from Co-Mg-O solid solution synergizing with LiH for efficient ammonia synthesis

2021 ◽  
Author(s):  
Wenbo Gao ◽  
Sheng Feng ◽  
Hanxue Yan ◽  
Qianru Wang ◽  
Hua Xie ◽  
...  
Keyword(s):  
Solid Solution ◽  
Metal Nanoparticles ◽  
Magnesium Oxide ◽  
Ammonia Synthesis ◽  
Oxide Solid Solution ◽  
In Situ Formation

A cobalt magnesium oxide solid solution (Co-Mg-O) supported LiH catalyst has been synthesized, in which LiH functions both as a strong reductant for in-situ formation of Co metal nanoparticles and...

Nucleation promotion of zeolite crystals by in situ formation of silver-based heterogeneous nuclei

2012 ◽  
Vol 153 ◽  
pp. 59-62 ◽  
Author(s):  
F. Hamidi ◽  
F. Boukli-Hacène ◽  
T. Cacciaguerra ◽  
A. Bengueddach ◽  
F. Di Renzo
Keyword(s):  
In Situ Formation ◽  
Zeolite Crystals

scholarly journals Synthesis of mesoporous zeolite catalysts by in situ formation of carbon template over nickel nanoparticles

2016 ◽  
Vol 225 ◽  
pp. 232-237 ◽  
Author(s):  
Jacob Oskar Abildstrøm ◽  
Marina Kegnæs ◽  
Glen Hytoft ◽  
Jerrik Mielby ◽  
Søren Kegnæs
Keyword(s):  
Nickel Nanoparticles ◽  
Zeolite Catalysts ◽  
Mesoporous Zeolite ◽  
Carbon Template ◽  
In Situ Formation

In situ formation of noble metal nanoparticles on multiwalled carbon nanotubes and its implication in metal–nanotube interactions

Carbon ◽  
2012 ◽  
Vol 50 (3) ◽  
pp. 875-884 ◽  
Author(s):  
Manuela Scarselli ◽  
Luca Camilli ◽  
Paola Castrucci ◽  
Francesca Nanni ◽  
Silvano Del Gobbo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Nanoparticles ◽  
Multiwalled Carbon Nanotubes ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Multiwalled Carbon ◽  
In Situ Formation

scholarly journals Formation of compact systems of super-Earths via dynamical instabilities and giant impacts

2019 ◽  
Vol 491 (4) ◽  
pp. 5595-5620 ◽  
Author(s):  
Sanson T S Poon ◽  
Richard P Nelson ◽  
Seth A Jacobson ◽  
Alessandro Morbidelli
Keyword(s):  
Initial Conditions ◽  
Post Processing ◽  
Significant Modification ◽  
Kepler Mission ◽  
Giant Impacts ◽  
Low Mass ◽  
In Situ Formation ◽  
Dynamical Instabilities ◽  
Gaseous Envelopes

ABSTRACT The NASA’s Kepler mission discovered ∼700 planets in multiplanet systems containing three or more transiting bodies, many of which are super-Earths and mini-Neptunes in compact configurations. Using N-body simulations, we examine the in situ, final stage assembly of multiplanet systems via the collisional accretion of protoplanets. Our initial conditions are constructed using a subset of the Kepler five-planet systems as templates. Two different prescriptions for treating planetary collisions are adopted. The simulations address numerous questions: Do the results depend on the accretion prescription?; do the resulting systems resemble the Kepler systems, and do they reproduce the observed distribution of planetary multiplicities when synthetically observed?; do collisions lead to significant modification of protoplanet compositions, or to stripping of gaseous envelopes?; do the eccentricity distributions agree with those inferred for the Kepler planets? We find that the accretion prescription is unimportant in determining the outcomes. The final planetary systems look broadly similar to the Kepler templates adopted, but the observed distributions of planetary multiplicities or eccentricities are not reproduced, because scattering does not excite the systems sufficiently. In addition, we find that ∼1 per cent of our final systems contain a co-orbital planet pair in horseshoe or tadpole orbits. Post-processing the collision outcomes suggests that they would not significantly change the ice fractions of initially ice-rich protoplanets, but significant stripping of gaseous envelopes appears likely. Hence, it may be difficult to reconcile the observation that many low-mass Kepler planets have H/He envelopes with an in situ formation scenario that involves giant impacts after dispersal of the gas disc.

scholarly journals Method for determining the thermal conductivity of in situ formation rock using drilling cuttings

AIP Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 065015
Author(s):  
Fu Yi ◽  
Xupeng Qi ◽  
Xuexin Zheng ◽  
Huize Yu ◽  
Wenming Bai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
In Situ Formation
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