From Chitin to α-Glycosides of N -Acetylglucosamine Using Catalytic Copper Triflate in a Heated Sealed-Vessel Reactor

2017 ◽  
Vol 2017 (34) ◽  
pp. 5094-5101 ◽  
Author(s):  
Dany Frem ◽  
Dominique Urban ◽  
Stéphanie Norsikian ◽  
Jean-Marie Beau
Keyword(s):  
Vessel Reactor

Comparative Calculations of TROI TS-2 and TS-3 Steam Explosion Experiments With TEXAS-V

2017 ◽  
Author(s):  
Taehoon Kim ◽  
Sukyoung Pak ◽  
Yongjin Cho
Keyword(s):  
Void Fraction ◽  
Steam Explosion ◽  
Peak Pressure ◽  
Severe Accident ◽  
Experiment Data ◽  
Trigger Time ◽  
Vessel Reactor ◽  
The Moment ◽  
Containment Integrity ◽  
Good Agreement

During a severe accident, contact of the molten corium with the coolant water may cause an energetic steam explosion which is a rapid increase of explosive vaporization by transfer to the water of a significant part of the energy in the corium melt. This steam explosion has been considered as an adverse effect when the water is used to cool the molten corium and could threaten reactor vessel, reactor cavity, containment integrity. In this study, TROI TS-2 and TS-3 experiments as part of the OECD/SERENA-2 project were analyzed with TEXAS-V. Input parameters were based on actual TROI experiment data. In mixing simulations, calculated results were compared to melt front behavior, void fraction in trigger time and other parameters in experiment results. In explosion simulations, corresponding to TROI experiments an external triggering was employed at the moment that melt front reached heights of 0.4 m. Calculated results of peak pressure and impulse at the bottom were compared with TROI experiment results. Melt front behaviors of the melt was different from the experimental results in both TS-2 and TS-3. Void fraction in triggering time in TS-2 was in good agreement with the experiment results and in TS-3 was slightly overestimated. The peak pressure and impulse at bottom were successfully predicted by TEXAS-V. These calculations will allow establishing whether the limitations and differences observed in the simulations of the experiments are important for the reactor case.

Separation system of a new-generation boiling-water vessel reactor

Atomic Energy ◽  
1994 ◽  
Vol 76 (5) ◽  
pp. 357-362
Author(s):  
V. B. Karasev ◽  
O. Yu. Novosel’skii ◽  
A. V. Shishov
Keyword(s):  
Boiling Water ◽  
Separation System ◽  
Vessel Reactor ◽  
New Generation

scholarly journals Heat exchanger for neutron thermalization device in beam research vessel reactor

2020 ◽  
Vol 20 (2) ◽  
pp. 263-271
Author(s):  
A.P. Serebrov ◽  
V.A. Lyamkin ◽  
A.O. Koptyukhov ◽  
M.S. Onegin ◽  
A.N. Kovalenko
Keyword(s):  
Heat Exchanger ◽  
Research Vessel ◽  
Neutron Thermalization ◽  
Vessel Reactor

Design and Performance Validation of a Conductively Heated Sealed-Vessel Reactor for Organic Synthesis

2016 ◽  
Vol 81 (23) ◽  
pp. 11788-11801 ◽  
Author(s):  
David Obermayer ◽  
Desiree Znidar ◽  
Gabriel Glotz ◽  
Alexander Stadler ◽  
Doris Dallinger ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Vessel Reactor ◽  
And Performance ◽  
Performance Validation

scholarly journals Rapid Synthesis of Asymmetric Methyl-Alkyl Carbonates Catalyzed by α-KMgPO4 in a Sealed-Vessel Reactor Monowave 50

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 499
Author(s):  
Tiefeng Wang ◽  
Xu Li ◽  
Xiaosheng Zhang ◽  
Jinxiang Dong
Keyword(s):  
Dimethyl Carbonate ◽  
Catalytic Mechanism ◽  
Metal Salts ◽  
Optimal Conditions ◽  
Base Catalyst ◽  
Vessel Reactor ◽  
Temperature Programmed ◽  
Heterogeneous Base Catalyst ◽  
Heterogeneous Base ◽  
Tribology Performance

Dimethyl-carbonate (DMC) is a green carboxymethylation agent for synthesis of the versatile long-chain alkyl carbonates through base-catalyzed transesterification with aliphatic alcohols. Herein, we demonstrated the facile preparation of a novel heterogeneous base catalyst α-KMgPO4 using commercially cheap metal salts via hydrothermal-calcination procedure. The combination of temperature programmed desorption (TPD) and FTIR measurements with CO2 pre-adsorbed revealed the presence of weak and medium base sites on α-KMgPO4. Furthermore, α-KMgPO4 catalyzed transesterification of DMC and n-octanol was performed in a sealed-vessel reactor (Monowave 50). The results show that the reaction was completed in only 10 min with the 97.5% conversion of n-octanol and >99% selectivity to asymmetric methyl-octyl carbonate under the optimal conditions. Additionally, the possible catalytic mechanism is proposed. As an extended contribution, the tribology performance of the asymmetric methyl-alkyl carbonates was further evaluated.

scholarly journals Development of Water Level Gauge with Binary Coding Thermocouples and Its Application to Measurement of In-Vessel Reactor Water Level.

1993 ◽  
Vol 35 (11) ◽  
pp. 999-1014
Author(s):  
Katsuyuki ARA ◽  
Masaki KATAGIRI ◽  
Naoaki WAKAYAMA ◽  
Kazuo KOBAYASHI ◽  
Karel P. TERMAAT ◽  
...  
Keyword(s):  
Water Level ◽  
Level Gauge ◽  
Reactor Water ◽  
Binary Coding ◽  
Vessel Reactor
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