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ABSTRACT: The applications of stable isotopes from different chemical elements are well-known. Based on specific properties, a great diversity of isotope concentration (separation) methods have been developed, one of them being the cryogenic separation for (<sup>13</sup>C). After a short description of the separation equipment (separation column), the authors deal with the arising of the flooding process. Based on simplified equations, the evolution of an intended flooding is studied, divided in more stages: normal mode of operation, pre-flooding, ldquodischargerdquo period, flooding period and flooding damping. The next step of study will analyze the possibilities to avoid the flooding process.
Automation, Quality and Testing, Robotics, 2008. AQTR 2008. IEEE International Conference on; 06/2008
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ABSTRACT: The (<sup>13</sup>C) isotope separation process is a very important technical, scientific and industrial domain of activity. The operation plant is complex, with many input-output variables, difficult to model and to control. The authors identify the terminal and internal variable, define a dedicated structural model and conceive a complex control system, able to maintain the separation process at the desired parameters. Also, some descriptions about the dedicated transducers are given
Automation, Quality and Testing, Robotics, 2006 IEEE International Conference on; 06/2006
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ABSTRACT: There are many domains of life, techniques, industry, environmental analysis and protection, where the heavier isotope are useful. The predominant isotope of the carbon is (<sup>12</sup>C), with the natural abundance of 98.9%, but as tracer in many application is asked the (<sup>13</sup>C) isotope, initially with the concentration of 1.1%. For industrial output and higher concentration, the method of the cryogenic distillation is a proper solution. The paper deals with the general analysis of the operation for the (<sup>12</sup>C) isotope separation column, some design element, the "local" and "global" models for the column operation
Automation, Quality and Testing, Robotics, 2006 IEEE International Conference on; 06/2006
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ABSTRACT: The cryogenic distillation applied to the isotope separation of ( 13C) is a special application, with particular features in both technologies: distillation and isotope separation. Unlike the air or natural gas cryogenic distillation, the inflow of the material with natural abundance in heavy isotope has a minor influence on the concentration evolution; there are many other significant factors. Generally, the "time constants" of the cryogenic distillation plant for isotope separation (enrichment) are longer than the "time constants" of other technological processes. The evolution of the isotope enrichment in time and space may be known only using mathematical models. Practically, no samples in various points of the distillation plant are possible. With these aspects in mind, the necessity of mathematical models is justified
International Conference on Automation, Quality and Testing, Robotics. 05/2006; 1:159-162.
