https://dce.uni-sofia.bg/files/publications/1992/1992-06-PK-VP-II-KN.pdf

Capillary meniscus interaction between colloidal particles attached to a liquid-fluid interface

Stability and settling characteristics of solvent-diluted bitumen emulsions☆

This paper discusses the main factors that play an important role in the formation and stabilization of emulsions containing finely divided solids The influence of contact angle, particle size, particle interactions, and surfactants on emulsion behavior is discussed, and the state of the art in experimental techniques and fundamental research work is described

A Review of the Factors Affecting the Stability of Solids-Stabilized Emulsions

Simultaneous removal of asphaltenes and water from water-in-bitumen emulsion: I. Fundamental development

Holographic study of liquid surface deformations produced by floating particles

The removal of the mineral matter found in coal derived liquids is a very difficult solid/liquid separation process. Clays, pyrites and other minerals that occur in coal ultimately find their way i...

Novel Separation Processes for Solid/Liquid Separations in Coal Derived Liquids

Indirect measurement of inclined sedimentation for ash in coal liquids at high temperature and pressure by x-ray photography

Addition of antisolvents to coal liquids causes asphaltenes and/or preas-phaltenes in the oil to precipitate. The precipitated asphaltenes then agglomerate the particles, causing an increase in the sedimentation rate. A new experimental system has been developed which utilizes time sequenced x-ray photographs of the mineral matter settling in a chamber at high temperature (up to 400°C) and high pressure (400 psig). Experiments were carried out with Solvent Refined Coal filter feed obtained from the Pilot Plant in Wilsonville, Alabama. Initial settling rate data are presented for a variety of antisolvents and are correlated with a linear combination of their carbon to hydrogen ratio and solubility parameter. The advantage of this correlation over the ones proposed earlier is that it involves the use of more fundamental and readily available properties of the antisolvent. The molar weight averages of the carbon to hydrogen ratio and solubility parameter can be used to predict mixture effects for hy...

K. R. Vaidyanathan

Papers

Novel Separation Processes for Solid/Liquid Separations in Coal Derived Liquids

Indirect measurement of inclined sedimentation for ash in coal liquids at high temperature and pressure by x-ray photography

The Influence of Antisolvent Properties on the Initial Settling Rate of Mineral Matter in Solvent-Refined Coal