Liquid-phase oxidation of organic feedstock in a compact multichannel reactor
Liquid-phase oxidation of organic feedstock in a compact multichannel reactor
A millimeter-scale compact multifunctional reactor has been developed and tested for the selective oxidation of benzyl alcohol, using molecular oxygen as the oxidant. The reactor consists of parallel reaction channels that are packed with catalyst particles. Within the structured assembly are an integrated heat-exchange system, a gas/liquid mixing zone, and a provision for reactant injection. Experiments were performed in square channels that are 10 cm long with a cross-sectional area of 9 mm2. These were packed either with Ru/Al2O3 (0.9 wt % of Ru) or Ru/TiO2 (2 wt % of Rt) catalysts. Hydrodynamic characteristics of the system were evaluated to establish pressure drop and effectiveness of gas/liquid mixing and to confirm the nature of the gas-liquid flow regime. Operating the reactor at 8 bar and 388 K with a liquid flow L = 3.2 kg m-2 s-1 and gas flows G > 2.5 × 10-2 kg m-2 s-1, it was shown that, even in a short 10 cm length of channel, a product yield of up to 55% (with 99.7% selectivity) could be obtained. Although the adiabatic temperature rise at 55% yield is estimated to be ca. 180 K, the reactor was shown to operate isothermally, because of the efficient removal of heat through the integrated micro-heat-exchange system. It was concluded that this structured design of a reactor showed considerable promise for the development of cleaner oxidation processes.
9683-9690
Plucinski, Pawel K.
d3730fd2-65ab-49bd-adb0-f56600012e10
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Kolaczkowski, Stan T.
b62d750a-c726-4fa1-bdcb-8418738c56bb
Lapkin, Alexei A.
e5550045-9bdc-4cca-873a-16c2f37a64c8
2005
Plucinski, Pawel K.
d3730fd2-65ab-49bd-adb0-f56600012e10
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Kolaczkowski, Stan T.
b62d750a-c726-4fa1-bdcb-8418738c56bb
Lapkin, Alexei A.
e5550045-9bdc-4cca-873a-16c2f37a64c8
Plucinski, Pawel K., Bavykin, Dmitry V., Kolaczkowski, Stan T. and Lapkin, Alexei A.
(2005)
Liquid-phase oxidation of organic feedstock in a compact multichannel reactor.
Industrial and Engineering Chemistry Research, 44 (25), .
(doi:10.1021/ie050280x).
Abstract
A millimeter-scale compact multifunctional reactor has been developed and tested for the selective oxidation of benzyl alcohol, using molecular oxygen as the oxidant. The reactor consists of parallel reaction channels that are packed with catalyst particles. Within the structured assembly are an integrated heat-exchange system, a gas/liquid mixing zone, and a provision for reactant injection. Experiments were performed in square channels that are 10 cm long with a cross-sectional area of 9 mm2. These were packed either with Ru/Al2O3 (0.9 wt % of Ru) or Ru/TiO2 (2 wt % of Rt) catalysts. Hydrodynamic characteristics of the system were evaluated to establish pressure drop and effectiveness of gas/liquid mixing and to confirm the nature of the gas-liquid flow regime. Operating the reactor at 8 bar and 388 K with a liquid flow L = 3.2 kg m-2 s-1 and gas flows G > 2.5 × 10-2 kg m-2 s-1, it was shown that, even in a short 10 cm length of channel, a product yield of up to 55% (with 99.7% selectivity) could be obtained. Although the adiabatic temperature rise at 55% yield is estimated to be ca. 180 K, the reactor was shown to operate isothermally, because of the efficient removal of heat through the integrated micro-heat-exchange system. It was concluded that this structured design of a reactor showed considerable promise for the development of cleaner oxidation processes.
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Published date: 2005
Organisations:
Engineering Sciences
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Local EPrints ID: 23613
URI: http://eprints.soton.ac.uk/id/eprint/23613
ISSN: 0888-5885
PURE UUID: 2a2662d3-96bb-46ba-9888-cb5f4020a46b
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Date deposited: 20 Mar 2006
Last modified: 15 Mar 2024 06:48
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Author:
Pawel K. Plucinski
Author:
Stan T. Kolaczkowski
Author:
Alexei A. Lapkin
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