Catalytic Action under High Pressure at High Temperature

The ReactorAFM: non-contact atomic force microscope operating under high-pressure and high-temperature catalytic conditions.

An Atomic Force Microscope (AFM) has been integrated in a miniature high-pressure flow reactor for in-situ observations of heterogeneous catalytic reactions under conditions similar to those of industrial processes. The AFM can image model catalysts such as those consisting of metal nanoparticles on flat oxide supports in a gas atmosphere up to 6 bar and at a temperature up to 600 K, while the ...

CHEMICAL REACTION AT HIGH TEMPERATURE AND HIGH PRESSURE VI Polymorphic Transition in ZnP, at High Temperature and High Pressure

:1 new pressure-induced modification of zincdiphosphide, ZnP2, has been prepared by the di reel union o(zinc with phosphorus and also through the polymorphic transitions of both monoclinic and tetragonal ZnP2. The application of pressures above 20 kb combined with temperatures above 150'C is required for [be synthesis. The new modification of ZnP2 has a pseuda•cuhic cps[al symmetry with a latti...

Low-temperature olivine rheology at high pressure

San-Carlos olivine rheology was investigated at pressure (P) up to 9 GPa and temperature (T) lower than 890 ◦C. Six powder specimens were cold compressed and sintered into dense and compact materials, then deformed during relaxation experiments carried out at constant pressure and temperature in DIA-type cubic-anvil apparatus. Sample elastic strain was monitored during relaxation by in situ X-r...

Molecular carbon dioxide at high pressure and high temperature

Elasticity of CaSiO3 perovskite at high pressure and high temperature

Ab initio molecular dynamic (AIMD) simulations were performed to calculate the equation of state (EOS) of CaSiO3 perovskite at mantle pressure–temperature conditions. At temperatures above 2000 K, even though the hydrostatic crystal structure is metrically tetragonal in the pressure range of 13–123 GPa, the symmetry of the elastic moduli is consistent with cubic symmetry. Our results show that ...