Continuous amination of aryl/heteroaryl halides using aqueous ammonia in a Teflon AF-2400 tube-in-tube micro-flow reactor

2019 ◽  
Vol 4 (2) ◽  
pp. 346-350 ◽  
Author(s):  
Chengwen Xue ◽  
Jiesheng Li ◽  
Jin Ping Lee ◽  
Ping Zhang ◽  
Jie Wu
Keyword(s):  
Flow Reactor ◽  
Aqueous Ammonia ◽  
Teflon Af ◽  
Tube Reactor ◽  
Micro Flow ◽  
Ammonia Source ◽  
High Yields

Aqueous ammonia was applied as the ammonia source in the continuous amination of aromatic and heteroaromatic halides assisted by a Teflon AF-2400 tube-in-tube reactor to generate densely substituted aryl/heteroaryl amines in high yields.

Effect of radical quenching on CH4/air flames in a micro flow reactor with a controlled temperature profile

2015 ◽  
Vol 35 (3) ◽  
pp. 3389-3396 ◽  
Author(s):  
Yuta Kizaki ◽  
Hisashi Nakamura ◽  
Takuya Tezuka ◽  
Susumu Hasegawa ◽  
Kaoru Maruta
Keyword(s):  
Temperature Profile ◽  
Flow Reactor ◽  
Micro Flow

scholarly journals Bioprocess Intensification Using Flow Reactors: Stereoselective Oxidation of Achiral 1,3-diols with Immobilized Acetobacter Aceti

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 208 ◽  
Author(s):  
Valerio De Vitis ◽  
Federica Dall’Oglio ◽  
Francesca Tentori ◽  
Martina Contente ◽  
Diego Romano ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Immobilized Cells ◽  
Reaction Times ◽  
Acetobacter Aceti ◽  
Batch Mode ◽  
Flow Reactors ◽  
Liquid Transfer ◽  
Gas Liquid Flow ◽  
High Yields ◽  
Stereoselective Oxidation

Enantiomerically enriched 2-hydroxymethylalkanoic acids were prepared by oxidative desymmetrisation of achiral 1,3-diols using immobilized cells of Acetobacter aceti in water at 28 °C. The biotransformations were first performed in batch mode with cells immobilized in dry alginate, furnishing the desired products with high molar conversion and reaction times ranging from 2 to 6 h. The biocatalytic process was intensified using a multiphasic flow reactor, where a segmented gas–liquid flow regime was applied for achieving an efficient O2-liquid transfer; the continuous flow systems allowed for high yields and high biocatalyst productivity.

Impact of low concentration hydrocarbons in natural gas on thermal partial oxidation in a micro-flow reactor for solid oxide fuel cell applications

2020 ◽  
Vol 477 ◽  
pp. 229007
Author(s):  
Brent B. Skabelund ◽  
Hisashi Nakamura ◽  
Takuya Tezuka ◽  
Kaoru Maruta ◽  
Jeongmin Ahn ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Natural Gas ◽  
Solid Oxide Fuel Cell ◽  
Partial Oxidation ◽  
Flow Reactor ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Low Concentration ◽  
Micro Flow

Soot and PAH Formation Characteristics in a Micro Flow Reactor With a Controlled Temperature Profile

2011 ◽  
Author(s):  
Ryu Tanimoto ◽  
Takuya Tezuka ◽  
Susumu Hasegawa ◽  
Hisashi Nakamura ◽  
Kaoru Maruta
Keyword(s):  
Flow Velocity ◽  
Temperature Profile ◽  
Mole Fraction ◽  
Equivalence Ratio ◽  
Flow Reactor ◽  
Volume Fraction ◽  
Soot Formation ◽  
Soot Volume Fraction ◽  
Low Flow ◽  
Micro Flow

To examine soot and PAH formation processes for rich methane/air and acetylene/air mixtures, a micro flow reactor with a controlled temperature profile was employed. In the experiment for a methane/air mixture, four kinds of responses to the variations of flow velocity and equivalence ratio were observed as follows: soot formation without a flame; a flame with soot formation; a flame without soot formation; and neither flame nor soot formation. Soot formations were observed in low flow velocity and high equivalence ratio. Starting point of soot formation shifted to the upstream side, i.e., low-temperature side, of the micro flow reactor with the decrease of flow velocity. One-dimensional steady-state computation was conducted by a flame code. In high flow velocity, low mole fraction of C2H2 and high mole fraction of OH were observed in the whole region of the micro flow reactor. Soot volume fraction did not increase in this case. On the other hand, in low flow velocity, high mole fraction of C2H2 and low mole fraction of OH were observed at the downstream side of the micro flow reactor. Soot volume fraction increased in this case. Since significant soot formation was observed at the low flow velocity and the high equivalence ratio, experiments with gas sampling were conducted for acetylene/air mixture to investigate temperature and equivalence ratio dependence of soot precursor production in such condition. Volume fractions of benzene increased with an increase of temperature. They were larger at higher equivalence ratio at the same temperature. Volume fractions of styrene increased with an increase of temperature. They were larger at higher equivalence ratio when the temperature is less than 1000 K. However the tendency was changed at 1000 K, styrene volume fraction at equivalence ratio of 7.0 was larger than that at equivalence ratio of 8.0.

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