Adsorption of Alkanes and Other Organic Molecules in Liquid Phase and in the Dense Vapor Phase:  Influence of Polarity, Zeolite Topology, and External Fluid Density and Pressure

1998 ◽  
Vol 37 (9) ◽  
pp. 3691-3698 ◽  
Author(s):  
Joeri F. Denayer ◽  
Abdelkarim Bouyermaouen ◽  
Gino V. Baron
Keyword(s):  
Liquid Phase ◽  
Vapor Phase ◽  
Organic Molecules ◽  
Fluid Density ◽  
External Fluid ◽  
Dense Vapor

Electrical porous silicon sensor for detection of various organic molecules in liquid phase

2015 ◽  
Vol 212 (8) ◽  
pp. 1851-1857 ◽  
Author(s):  
Farid A. Harraz ◽  
Adel A. Ismail ◽  
Houcine Bouzid ◽  
Saleh A. Al-Sayari ◽  
Ali Al-Hajry ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Porous Silicon ◽  
Organic Molecules ◽  
Silicon Sensor

A New Cavitation-Induced-Momentum-Defect (CIMD) Correction Approach to Track Cavitation Events

2007 ◽  
Author(s):  
Vedanth Srinivasan ◽  
Abraham J. Salazar ◽  
Kozo Saito
Keyword(s):  
Liquid Phase ◽  
Transport Equation ◽  
Vapor Phase ◽  
Incompressible Flows ◽  
Vapor Transport ◽  
Source Terms ◽  
Local Pressure ◽  
Cloud Cavitation ◽  
Tracking Model ◽  
The Impact

A new unsteady cavitation event tracking model is developed for predicting vapor dynamics occurring in multi-dimensional incompressible flows. The procedure solves incompressible Navier-Stokes equations for the liquid phase with an additional vapor transport equation for the vapor phase. The model tracks regions of liquid vaporization and applies compressibility effects to compute the local variation in speed of sound using the Homogeneous Equilibrium Model (HEM) assumptions. The variation of local cell density as a function of local pressure is used to construct the source term in the vapor fraction transport equation. The novel Cavitation-Induced-Momentum-Defect (CIMD) correction methodology developed in this study serves to account for cavitation inception and collapse events as relevant momentum source terms in the liquid phase momentum equations. Effects of vapor phase accumulation and diffusion are incorporated by detailed relaxation models. A modified RNG K-ε model, including the effects of compressibility in the vapor regions, is employed for modeling turbulence effects. Turbulent kinetic energy and dissipation contributions from the vapor regions are integrated with the liquid phase turbulence using relevant source terms. Numerical simulations are carried out using a Finite Volume methodology available within the framework of commercial CFD software code Fluent v.6.2. Simulation results are in qualitative agreement with experiments for unsteady cloud cavitation behavior in planar nozzle flows. Multitude of mechanisms such as formation of vortex cavities, vapor cluster shedding and coalescence, cavity pinch off are sharply captured by the supplemented vapor transport equation. Our results concur with previously established theories concerning sheet and cloud cavitation such as the re-entrant jet motion, cavity closure and the impact of adverse pressure gradients on cavitation dynamics.

scholarly journals Liquid-phase compositions from vapor-phase analyses

1989 ◽  
Author(s):  
W. Davis ◽  
H. Cochran ◽  
J. Leitnaker
Keyword(s):  
Liquid Phase ◽  
Vapor Phase

Preparation of Butadiene

1928 ◽  
Vol 1 (2) ◽  
pp. 208-210
Author(s):  
Stanley Francis Birch
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Liquid Phase ◽  
High Temperatures ◽  
Vapor Phase ◽  
Complex Mixture ◽  
Higher Temperature ◽  
Oil Gas

Abstract OF THE numerous methods available for the preparation of butadiene in the laboratory, those described by Thiele and by Ostromuislenskii are probably the most convenient. Both, however, suffer from the disadvantages which usually characterize operations at comparatively high temperatures; the exact conditions are difficult to find, the process is long and tedious, and finally involves the separation of the required material from a complex mixture. It has long been known that butadiene occurs in the various products obtained when oils are heated to a high temperature. Caventou first isolated butadiene in the form of its tetrabromide from illuminating gas, and Armstrong and Miller definitely established the presence of butadiene in the liquid obtained by compressing oil gas. The work of numerous later investigators has confirmed their results and has shown that the more drastic the heat treatment to which the oil is submitted the greater is the tendency for butadiene to be formed. For this reason vapor-phase cracking of petroleum, which is carried out at a much higher temperature than liquid-phase cracking, yields products specially rich in butadiene.

NMR Imaging of the Distribution of the Liquid Phase in a Catalyst Pellet during α-Methylstyrene Evaporation Accompanied by Its Vapor-Phase Hydrogenation

2002 ◽  
Vol 124 (33) ◽  
pp. 9684-9685 ◽  
Author(s):  
Igor V. Koptyug ◽  
Alexander V. Kulikov ◽  
Anna A. Lysova ◽  
Valery A. Kirillov ◽  
Valentin N. Parmon ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Vapor Phase ◽  
Nmr Imaging ◽  
Catalyst Pellet
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