Showing papers on "Gas separation published in 1974"

Gas separation membrane

Abstract: Novel gas separation film membranes are made by grafting alpha-olefinic, polymerizable monomers having hydrophilic functional groups and having, eg, about from 2 to about 12 carbon atoms, to nylon, and forming a film from the resulting copolymers A complex-forming metal component which is active in the presence of water is provided in the film The invention also includes the process of separating components from gaseous mixtures using the membranes Of particular interest is the separation of aliphatically-unsaturated hydrocarbons from mixtures, for example, the separation of ethylene from one or more of ethane, methane and hydrogen

Neon isotope separation by gaseous diffusion transport in the transition flow regime with regular geometries

Abstract: A comprehensive study of the pressure dependence of the separation efficiency ratio for separating neon isotopes by gaseous diffusion through well-defined capillary and parallel plate geometries has been made. This study was made to investigate the accuracy of the Present and deBethune theory for binary gas separation by gaseous diffusion. The Knudsen number varied from about 50 to 0.1. The results show that the theory in its present form does not very accurately represent the data. However, an empirical modification has been made to account for real gas properties such as wall-scattering law deviations, flow rate pressure dependence, and geometry variations; this modification represents a fairly accurate interpolation equation for the data. There are also implications that the Clausing calculation for free molecule flow does not accurately represent the momentum transport at the wall.

Process for direct-reduction of iron-ore employing nuclear reactor-powdered catalytic reformer

Abstract: A method of reforming a fluid to make it suitable for use as a reducing gas in a direct reduction process is provided. The method is also taught in conjunction with a specific process for which it is particularly suited. The method uses a high-temperature gas-cooled nuclear reactor as a heat source for a catalytic reformer which is coupled with a cryogenic gas separation step to remove a substantial amount of the unreacted hydrocarbon.

Accurate Kinetics Equations of a Square Cascade for Gas Separation

Abstract: Accurate kinetics equations, which can be applied to a square and to a two-step gas-separation cascade composed of stages with a large separation factor, are derived from the exact conservation of ...