Incorporation of statistical distributions of particle properties in chemical reactor design and operation: the cooled tubular reactor
نویسندگان
چکیده
منابع مشابه
Incorporation of Statistical Distributions of Particle Properties in Chemical Reactor Design and Operation: the Cooled Tubular Reactor
Pellet heat and mass transfer coefficients inside packed beds do not have definite deterministic values, but are stochastic quantities with a certain distribution. Here, a method is presented to incorporate the stochastic distribution of pellet properties in reactor design and operation models. The theory presented is illustrated with a number of examples. It is shown that pellet-scale statisti...
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In this paper the simulation results of the adaptive control inside the tubular chemical reactor with counter-current cooling in the jacket is shown. The adaptive controller is based on the choice of the External Linear Model as a linear representation of the originally nonlinear system parameters of which are identified recursively. The polynomial method together with spectral factorization an...
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T h e general reaction X + Y + M -» P + M m a y — due to substrate inhibit ion a t t h e catalyt ic site M — give rise t o bistabi l i ty p h e n o m e n a in an isothermal t u b u l a r fixed b e d reactor . T h e parametr ic condit ions for bistabil i ty in the single pellet are studied b y a numerical t e c h n i q u e . Solut ion o f the s t e a d y s tate equat ions for a t w o phase model...
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The paper deals with continuous-time adaptive control of a tubular chemical reactor with the countercurrent cooling as a nonlinear single input – single output process. The nonlinear model of the reactor is approximated by an external linear model with parameters estimated via corresponding delta model. The control system structure with two feedback controllers is considered. The resulting cont...
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آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
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ژورنال
عنوان ژورنال: Chemical Engineering Science
سال: 1992
ISSN: 0009-2509
DOI: 10.1016/0009-2509(92)80306-w