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Reaction Engineering with Metal-Orga...

Melkonian, Arek Viken.

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Reaction Engineering with Metal-Organic Framework Catalysts.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Reaction Engineering with Metal-Organic Framework Catalysts./
Author:	Melkonian, Arek Viken.
Description:	60 p.
Notes:	Source: Masters Abstracts International, Volume: 52-02.
Contained By:	Masters Abstracts International52-02(E).
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1545605
ISBN:	9781303412295

Reaction Engineering with Metal-Organic Framework Catalysts.
Melkonian, Arek Viken.

Reaction Engineering with Metal-Organic Framework Catalysts. - 60 p.

Source: Masters Abstracts International, Volume: 52-02.

Thesis (M.S.)--University of California, Los Angeles, 2013.

To date, there has been no comprehensive attempt to perform and/or describe catalytic reactions in the gas phase that utilize metal-organic frameworks (MOFs) as catalysts. In addition, there has been no attempt to reaction engineer these MOF catalysts in order to determine their regimes of optimal catalytic activity and possible limitations to their use. A zinc-based MOF that has been post-synthetically modified with a homogeneous palladium catalyst, Pd(CH 3CN)2Cl2, is used to catalyze the hydrogenation of propylene. The catalyst is assembled in a packed-bed reactor under a continuous flow of reactants. The reaction is optimized with respect to isoreticular metalation, reactant flow rate, and reactor temperature. Maximum catalytic conversion is found at intermediate metalations of 40% and 60%, high hydrogen flow of 50 ccm, and intermediate reactor temperatures of 100 °C and 150 °C.

ISBN: 9781303412295Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Reaction Engineering with Metal-Organic Framework Catalysts.
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005 20141121133042.5
008 150210s2013 ||||||||||||||||| ||eng d
020 $a 9781303412295
035 $a (MiAaPQ)AAI1545605
035 $a AAI1545605
040 $a MiAaPQ $c MiAaPQ
100 1 $a Melkonian, Arek Viken. $3 2105027
245 1 0 $a Reaction Engineering with Metal-Organic Framework Catalysts.
300 $a 60 p.
500 $a Source: Masters Abstracts International, Volume: 52-02.
500 $a Adviser: Richard B. Kaner.
502 $a Thesis (M.S.)--University of California, Los Angeles, 2013.
520 $a To date, there has been no comprehensive attempt to perform and/or describe catalytic reactions in the gas phase that utilize metal-organic frameworks (MOFs) as catalysts. In addition, there has been no attempt to reaction engineer these MOF catalysts in order to determine their regimes of optimal catalytic activity and possible limitations to their use. A zinc-based MOF that has been post-synthetically modified with a homogeneous palladium catalyst, Pd(CH 3CN)2Cl2, is used to catalyze the hydrogenation of propylene. The catalyst is assembled in a packed-bed reactor under a continuous flow of reactants. The reaction is optimized with respect to isoreticular metalation, reactant flow rate, and reactor temperature. Maximum catalytic conversion is found at intermediate metalations of 40% and 60%, high hydrogen flow of 50 ccm, and intermediate reactor temperatures of 100 °C and 150 °C.
520 $a The MOF-60 catalyst is exposed to a traditional catalyst poison, carbon monoxide (CO). It is found that the MOF is reversibly poisoned upon introduction of CO. Upon poisoning, catalytic conversions rates of 90%-100% are dramatically reduced to less than 10%-30%, depending on the CO flow rate and the reactor temperature. The CO poisoning is shown to be reversible, a similar effect as found with palladium on carbon (Pd/C). The time scale of poisoning and recovery is very fast for both the MOF catalyst and Pd/C (approximately 10-30 seconds).
520 $a Other effects of temperature on the MOF-40 are also investigated. At fixed reactant flow, the temperature grid is partitioned into finer steps of 10 °C to determine the temperature that yields the highest catalytic conversion. It is found that conversion is nearly uniform in the range between the highest conversions, i.e., conversion plateaus between the optimum temperatures. The catalyst also exhibits a weak thermal hysteresis. There is no significant improvement in conversion with thermal cycling after alternating the reactor temperature between 100 °C and 200 °C for 8 hours.
590 $a School code: 0031.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Chemistry, General. $3 1021807
650 4 $a Engineering, Chemical. $3 1018531
690 $a 0794
690 $a 0485
690 $a 0542
710 2 $a University of California, Los Angeles. $b Materials Science and Engineering. $3 2105028
773 0 $t Masters Abstracts International $g 52-02(E).
790 $a 0031
791 $a M.S.
792 $a 2013
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1545605