نتایج جستجو برای: channel reactor

تعداد نتایج: 252903  

2011
Joris W. Thybaut Guy B. Marin

1. Definition of Catalytic Properties 1.1. Conversion 1.2. Selectivity 1.3. Yield 1.4. Catalyst Deactivation and Sustainability 2. Reactor Types 2.1. Batch Reactor 2.2. Perfectly Mixed Flow Reactor 2.3. Plug Flow Reactor 3. Intrinsic Kinetics 3.1. External Mass and Heat Transport Limitations 3.2. Internal Mass and Heat Transport Limitations 3.3. Flow Pattern Ideality 4. Specific Reactor Types 4...

2014
Adrian M. Nightingale Thomas W. Phillips James H. Bannock John C. de Mello

Channel-fouling is a pervasive problem in continuous flow chemistry, causing poor product control and reactor failure. Droplet chemistry, in which the reaction mixture flows as discrete droplets inside an immiscible carrier liquid, prevents fouling by isolating the reaction from the channel walls. Unfortunately, the difficulty of controllably adding new reagents to an existing droplet stream ha...

2005
Rob Mahurin Geoffrey Greene Paul Kohler Vince Cianciolo

We study the expected performance of the proposed fundamental neutron physics beamline at the upgraded High Flux Isotope Reactor at Oak Ridge National Laboratory. A curved neutron guide transmits the neutrons from the new cold source into a guide hall. A novel feature of the proposed guide is the use of vertical focussing to increase the flux for experiments that require relatively small cross-...

Journal: :Nukleonika 2021

Abstract The Irradiation System for High-Temperature Reactors (ISHTAR) thermostatic rig will be used to irradiate advanced core material samples in conditions corresponding those prevailing the high-temperature reactors (HTRs): these include a stable temperature extending up 1000°C helium atmosphere. Computational and experimental studies concerning design have been conducted, proving possibili...

2016
Martin Klein Ferdinand Scholz

In order to overcome problems with non-uniform iron (Fe) doping in our GaN layers grown by hydride vapor phase epitaxy, we have optimized the construction of our ferrocene doping channel. By pre-heating the hydrogen carrier gas before entering the hot bubbler, a constant Fe supply could be established. Moreover, losses of the precursor gas in the reactor could be minimized by a re-design of the...

Journal: :Science 2004
Juta Kobayashi Yuichiro Mori Kuniaki Okamoto Ryo Akiyama Masaharu Ueno Takehiko Kitamori Shu Kobayashi

We have developed an efficient system for triphase reactions using a microchannel reactor. Using this system, we conducted hydrogenation reactions that proceeded smoothly to afford the desired products quantitatively within 2 minutes for a variety of substrates. The system could also be applied to deprotection reactions. We could achieve an effective interaction between hydrogen, substrates, an...

Journal: :Lab on a chip 2010
Jie Fang Cameron W Evans Glen J Willis David Sherwood Yanglong Guo Guanzhong Lu Colin L Raston K Swaminathan Iyer

CePO(4) nanorods decorated with QDs (QDs@CePO(4)) can be prepared in a sequential, aqueous procedure under continuous flow using a rotating tube processor and a narrow channel reactor. The emission from the QD@CePO(4) is tunable from green to red by simply adjusting the feeding rate, which in turn regulates the particle size of the QDs. The Ce(3+) ions in the QDs@CePO(4) serve as an efficient f...

2001
P. Sander L.

The products of the reaction of OClO with NO3 were investigated between 220 and 298 K using a flow reactor and infrared, visible, and ultraviolet analysis. At temperatures below 250 K new infrared and ultraviolet absorption features were observed and assigned to the novel compound chloryl nitrate (OZClON02). Additionally, ClO and NOz were observed as reaction products, indicating the existence ...

J. Jafari S Khakshournia

Tehran Research Reactor (T.R.R.) is a pool-type, 5 MW thermal research reactor. One probable event is that if some external objects or debris fall down into the reactor core and cause obstruction of the coolant flow through one of the fuel assemblies, decreasing the surface flow area, ceases the coolant flow, and also raises the fuel and sheaths tempe...

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