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20220104090732.0 |
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820730s1981 xx a bm 000 0 eng d |
| 035 |
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|9 AAJ7171AM
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|a (OCoLC)08646193
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|a (OCoLC)8646193
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|a (OCoLC)ocm08646193
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|a TXA
|b eng
|c TXA
|d OCLCQ
|d OCLCF
|d OCLCO
|d OCLCQ
|d UMI
|d TXA
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| 049 |
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|a TXAM
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| 100 |
1 |
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|a Martir, Wilson.
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| 245 |
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|a Gas phase radicals formed on metal oxide surfaces.
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| 264 |
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|c 1981.
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| 300 |
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|a xii, 151 leaves :
|b illustrations ;
|c 29 cm
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| 336 |
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|a text
|b txt
|2 rdacontent
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| 337 |
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|a unmediated
|b n
|2 rdamedia
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| 338 |
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|a volume
|b nc
|2 rdacarrier
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| 500 |
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|a "Major subject: Chemistry."
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| 500 |
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|a Typescript (photocopy).
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| 500 |
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|a Vita.
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| 502 |
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|b Ph. D. in Philosophy
|c Texas A & M University
|d 1981
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| 504 |
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|a Includes bibliographical references (leaves 123-127).
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| 520 |
3 |
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|a The formation of gas phase radicals during the partial oxidation of propylene, 1-butene, isobutylene, and methane over several metal oxides was investigated. The radicals were isolated by employing a matrix isolation unit in tandem with a flow reactor and identified by epr spectroscopy. In a separate experiment the stable products of these reactions were studied, under similar experimental conditions as those used for the gas phase radical studies. Gas phase allyl radicals were formed during the oxidation of propylene over Bi(,2)O(,3) and (gamma)-bismuth molybdate. The amounts of 1,5-hexadiene and gas phase allyl radicals obtained during the oxidation of propylene over Bi(,2)O(,3) indicate that a heterogeneous-homogeneous mechanism was a major route for the formation of 1,5-hexadiene. During the oxidation of 1-butene over Bi(,2)O(,3), in the presence of molecular oxygen, and during the oxidation of isobutylene over Bi(,2)O(,3) 1-methylallyl radicals and 2-methylallyl peroxy radicals were found, respectively. The radical selectivity and the energy of activation obtained in the oxidation of propylene and 1-butene was sensitive to the degree of oxidation of the catalyst surface. Over a highly oxidized Bi(,2)O(,3) catalyst, the main surface reaction with small olefins, however, was the abstraction of a hydrogen atom forming allylic radicals. The partial oxidation of methane over magnesium oxide, silica gel, and alumina, under reducing and oxidizing conditions, produced gas phase methyl radicals. The principal stable products obtained over MgO were ethane, ethylene and methanol. Both radical and stable product formation were enhanced by the presence of N(,2)O or molecular oxygen in the gas feed composition. These results were interpreted by assuming the formation of O('-) ions, from N(,2)O or molecular oxygen, which rapidly reacted with methane via hydrogen atom abstraction, to form methyl radicals.
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| 650 |
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|a Heterogeneous catalysis.
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| 650 |
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0 |
|a Hydrocarbons.
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| 650 |
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0 |
|a Matrix isolation spectroscopy.
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| 650 |
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|a Radicals (Chemistry)
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| 650 |
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4 |
|a Chemistry
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| 655 |
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7 |
|a Academic theses
|2 lcgft
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| 700 |
1 |
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|a Lunsford, Jack H.,
|e degree supervisor.
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| 710 |
2 |
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|a Texas A & M University,
|e degree granting institution.
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| 856 |
4 |
1 |
|3 Proquest
|u http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=749776611&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD
|z Link to ProQuest Copy
|t 0
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| 856 |
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1 |
|u http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=749776611&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD
|z Link to ProQuest Copy
|t 0
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| 856 |
4 |
1 |
|u https://hdl.handle.net/1969.1/DISSERTATIONS-90834
|z Link to OAKTrust copy
|t 0
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| 994 |
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| 952 |
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|p noncirc
|a Texas A&M University
|b J.J. Pickle Campus
|c High Density Repository
|s HDR
|d Remote Storage
|t 0
|e 1981 Dissertation M387
|h Other scheme
|i unmediated -- volume
|m A14841002513
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| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|s www_evans
|d Available Online
|t 0
|e 1981 Dissertation M387
|h Other scheme
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| 998 |
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|a 1981 Dissertation M387
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| 998 |
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|a 1981 Dissertation M387
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