95/05805 Kinetics of liquefaction of Borodino coal in a column-type reactor

Abstract The structural steel in a nuclear facility experiences significant degradation due to the accumulated neutron irradiation. Particularly, the long-column type reactor pressure vessel supports have been focused since they resist considerable loading to maintain the primary coolant system in their position and experience high neutron irradiation in low temperature, which is an unfavorable condition for the fracture toughness. This study implemented the API 579-1/ASME FFS-1, fitness-for-service (FFS) method to consider both irradiated mechanical properties and multiple loading cases. A three-dimensional (3D) finite element model of long column type reactor pressure vessel support was built for the linear analysis. The metallurgical properties of reactor pressure vessel support for assessment were estimated by empirical equations. This study provides the structural margin of long-column type reactor pressure vessel support by levels of the loads and levels of the neutron fluence.

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The effect of bubbling regime and mode of mechanical agitating on the course of hydrogenation of vegetable oil

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19901721 ◽

1990 ◽

Vol 55 (7) ◽

pp. 1721-1729

Author(s):

Ivan Dědek

Keyword(s):

Vegetable Oil ◽

Sunflower Oil ◽

Hydrogen Distribution ◽

Hydrodynamic Properties ◽

Type Reactor ◽

Surprising Effect ◽

Laboratory Reactor ◽

Air Lift ◽

Kinetics Of

The effect of hydrogen distribution was studied on the rate and selectivity of hydrogenation of sunflower oil in a bubbled air-lift-type reactor and in a laboratory reactor with interchangeable agitators. It was found that the change of bubbling regime considerably influences character of the reaction. The hydrodynamic properties of agitators have even the surprising effect on the kinetics of hydrogenation. The rate and selectivity of the reaction is to be efficiently controlled by the intensity and mode of agitating in both types of reactors.

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Assessment of the neutron flux stability in a high power BN-type reactor in terms of modal spatial kinetics

Nuclear Energy and Technology ◽

10.3897/nucet.7.73488 ◽

2021 ◽

Vol 7 (3) ◽

pp. 201-206

Author(s):

Ivan V. Tormyshev ◽

Andrey V. Gulevich ◽

Vladimir A. Yeliseev ◽

Victor Yu. Stogov

Keyword(s):

Neutron Flux ◽

High Power ◽

Power Distribution ◽

Large Diameter ◽

Orthogonal Functions ◽

The Core ◽

Type Reactor ◽

The Matrix ◽

The Stability ◽

Kinetics Of

The article discusses the neutron flux stability in the core of a high-power sodium-cooled fast reactor (of the BN-type) without feedbacks. The importance of this problem for high-power BN-type reactors is associated with the specific features of the layout of their cores, including a large diameter and height/diameter ratio about 5. The technique used to substantiate the stability of neutron fields is based on the analysis of the spectrum of the matrix of the system of spatial kinetics equations describing the core of a high-power BN-type reactor without feedbacks. A computational model of the spatial kinetics of a high-power BN-type reactor has been developed in the modal approximation based on the representation of an unsteady flux as a sum of orthogonal functions multiplied by time-dependent amplitudes. The eigenfunctions of the conditionally critical problem are used in the diffusion approximation, which in the discrete case form a complete system. The spectrum of the matrix of the system of ordinary differential equations describing the spatial kinetics of the reactor has been calculated. It is shown that the neutron flux in the core of a high-power BN-type reactor without feedbacks is stable. Test calculations have illustrated the damping of perturbations of the power distribution for a reactor in a critical state.

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Citrus butanol esters having plasticizing and lubricant characteristics obtained in a bubble column type reactor

Studia Universitatis Babeș-Bolyai Chemia ◽

10.24193/subbchem.2021.01.08 ◽

2021 ◽

Vol 66 (1) ◽

pp. 105-113

Author(s):

Sorina Boran ◽

◽

Giannin Mosoarca ◽

Sabina Nitu ◽

Cosmin Vancea ◽

...

Keyword(s):

Bubble Column ◽

Type Reactor ◽

Column Type

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Culture of Red Beet Hairy Roots in a Column-type Reactor Associated with Pigment Release.

Plant tissue culture letters ◽

10.5511/plantbiotechnology1984.12.201 ◽

1995 ◽

Vol 12 (2) ◽

pp. 201-204 ◽

Cited By ~ 5

Author(s):

Masahiro KINO-OKA ◽

Masahito TAYA ◽

Setsuji TONE

Keyword(s):

Hairy Roots ◽

Type Reactor ◽

Red Beet ◽

Column Type

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Relation between Respirometric Data and Amylolytic Enzyme Production by SSF in Column-Type Bioreactor

International Journal of Chemical Reactor Engineering ◽

10.2202/1542-6580.1485 ◽

2007 ◽

Vol 5 (1) ◽

Cited By ~ 1

Author(s):

Michele Rigon Spier ◽

Ursula Konietzny Greiner ◽

Ralf Greiner ◽

Jose Angel Rodriguez-León ◽

Julio Cesar Carvalho ◽

...

Keyword(s):

Solid Substrate ◽

Co2 Production ◽

Amylolytic Enzyme ◽

Amylolytic Enzymes ◽

Column Type ◽

Column Bioreactor ◽

Forced Air ◽

Optimized Conditions ◽

Kinetics Of ◽

By Products

The use of agro industrial by-products like cassava starch and sugar cane bagasse show great potential as substrates and support amylases production by solid-substrate fermentation (SSF). The production of amylolytic enzymes by Aspergillus niger LPB 28 increased with forced air using a column fermentation system and optimized conditions in a column bioreactor when it was followed by kinetics of respiratory metabolism. The O2 consumption and CO2 production by A. niger were measured in the top of the columns through the use of a GC system linked to a program for chromatograph control and integration with 2m length, with helium as the carrier gas and a thermal conductivity detector. The kinetic parameters were determined using the program FERSOL.

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