Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Zdravko Stefanov"'
Autor:
Anthony P. Gies, Praveenkumar Boopalachandran, J. Paul Chauvel, Zdravko Stefanov, Debashis Chakraborty, Nathan J. Rau
Publikováno v:
Macromolecules. 49:1201-1221
The overall goal of the present study was to identify the high molecular weight species formed during the synthesis and processing of polymeric methylene diphenyl diisocyanate (PMDI) and determine the root cause of the viscosity buildup in these mate
Autor:
Karlene A. Hoo, Zdravko Stefanov
Publikováno v:
Industrial & Engineering Chemistry Research. 44:3146-3158
This work studies the control of a single falling-film evaporator and a multiple-effect falling-film evaporator plant. The specific case studied is the concentration of solids found in the liquor that is part of the production of sulfate (kraft) pulp
Autor:
Zdravko Stefanov, Karlene A. Hoo
Publikováno v:
Industrial & Engineering Chemistry Research. 43:8117-8132
In the first of two parts of this work, a distributed parameter model, based on first-principles knowledge about the fluid dynamics and heat-transfer processes, was developed for the evaporation side of a single plate (lamella) of a falling-film evap
Autor:
Zdravko Stefanov, Karlene A. Hoo
Publikováno v:
Industrial & Engineering Chemistry Research. 42:1925-1937
Phenomenological modeling of black liquor evaporators, found in the pulp and paper industry, presents a very challenging task. The physicochemical phenomena that occur do not lend themselves readily to known mechanisms, and in many instances, data to
Autor:
Zdravko Stefanov, Leo H. Chiang
Publikováno v:
Proceedings of the 2011 American Control Conference.
A product is produced in a production train that consists of two batch reactors in series. The quality specifications require that a particular critical impurity (CI) in the product should be below 0.4%. The plant was experiencing series of poor qual