Systematic Modeling of the (¹³C) Isotope Cryogenic Distillation Process

Abstract

Isotopic enrichment by low-temperature distillation of carbon monoxide is difficult to handle, the experiments providing with the necessary data are time-consuming and difficult to perform, so the mathematical modeling of the process is an appropriate approach to study and to further control the column. This paper develops a mathematical model for the ( 13 C) isotope cryogenic distillation process using two subsystems of the plant: the hydrodynamic part and the isotope-separation part. The model is validated using experimental data from the pilot column from the National Institute for Research and Development of Isotopic and Molecular Technologies Cluj-Napoca. The proposed model is suitable for various cryogenic distillation columns, using the proper parameters.

Analysis, modeling and simulation of a DC supply with load power control

“…Our particular application is related to the ( 13 C) cryogenic isotope separation process, developed in a thermal insulated column, cooled at about (-200 o C) with liquid nitrogen [1,2,3,4]. At this temperature the liquid and gaseous phase of ultra-pure carbon monoxide are present in column.…”

“…If (η) is the thermal efficiency of boiler heating element, (λ) is the latent heat of vaporization [1],(R L ) -the value of the resistor in boiler, supplied by the voltage (U L ) and (I L ) is the resistor current, the thermal balance equation is:…”

“…In a natural process, the isotope of interest ( 13 C), with the initial concentration of (1.11%) [4,5,6] is accumulated in the liquid phase as final product while the predominant ( 12 C) isotope with the abundance of (98.89%) accumulated in the gaseous phase and extracted as waste. In such equipment from INCDTIMfrom Cluj-Napoca, Romania it is possible to obtain an enrichment of ( 13 C) from the natural concentration up to 8-10%, this process being known as isotope separation [1,2,3,4,5].…”

Robust Fractional Order Controllers for Distributed Systems

“…The actual equipment, as well as a schematic representation, are given in Figures 1 and 2. A great deal of papers have been published previously by the Authors describing the characteristics and operation of a single column or the cascade, the model of such a plant, as well as several control strategies [15][16][17][18][19][20][21].…”

Control of a Train of High Purity Distillation Columns for Efficient Production of 13C Isotopes

“…Robust controllers are based on the existence of a (linear) process model [13]. The development of a good model is therefore crucial for the control system synthesis.…”