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Some reactions of acetylene ...Nieuwland, Julius A. January 1904 (has links)
Thesis (Ph. D.)--Catholic University of America.
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Some reactions of acetylene ...Nieuwland, Julius A. January 1904 (has links)
Thesis (Ph. D.)--Catholic University of America.
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The production of acetylene from methane by partial oxidationWatt, Leonard John January 1951 (has links)
Acetylene may be produced from methane in any process which raises the methane to a high temperature for a very short period followed by rapid cooling. There are three processes which accomplish these critical conditions of temperature and reaction time: A. By electric discharge through the gas
B. By supplying heat from an auxilliary fuel either in direct heat exchange or in a regenerative type furnace
C. By simultaneously burning some of the feed gas by the admixture of some oxygen
The last of these processes was studied in this project in a flow type reactor. The process was studied at temperatures of 1000°C to 1300°C and reaction times of .01 to .03 seconds. An attempt was made to derive the mechanism for this process.
A quartz reactor of special design was used in this study. It consisted of three zones: namely, the preheat zone where the oxygen, and methane were separately preheated, the reaction zone where the oxygen and methane were mixed and burned, and finally the quench zone where the reaction products were rapidly cooled and the reaction halted. The products were then analyzed for acetylene, carbon dioxide, carbon monoxide, hydrogen and methane. The mechanism for the partial oxidation of methane is believed to follow the following reactions. First there are the initial rapid oxidation reactions which supply the necessary heat to crack methane: CH₄ + ½O₂ → CO + 2H₂ ; CH₄ + 2O₂ → CO₂+ 2H₂O ; CH4 + O₂ → C + 2H₂O
After the oxygen has been used up, methane decomposes into ethane, ethylene, acetylene, carbon and hydrogen by the following reactions: CH₄ ⇌ CH₂ + H₂ ; CH₄ + CH₂ ⇌ C₂H₆ ; C₂H₆ ⇌ C₂H₄ + H₂ ; C₂H₄ ⇌ C₂H₂ + H₂ ; C₂H₂ ⇌ 2C + H₂
The rate of formation of acetylene was found to depend upon the square of the methane concentration while the rate of decomposition of acetylene depended upon the concentration of the acetylene. As the reaction progresses the concentration of acetylene rises to a maximum and then decreases to zero. This was explained to occur because the methane concentration decreased with time.
Further reaction follows between the products of combustion and the products of decomposition of methane. The most important of these is the water gas reaction: C + H2Q ⇌ CO + H₂
It was proven by stoichiometric considerations that this reaction takes place, and is the most important of the side reactions. The following reactions also take place to a small extent:
C + CO₂ ⇌ 2CO ; CO + H₂O ⇌ C0₂ + H₂ / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate
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Researches on acetylenesBhattacharjee, Dipali January 1968 (has links)
No description available.
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Studies on syntheses, reactions, and biomedical applications of functionalized alkynes /Lai, Kwong Wah. January 2004 (has links)
Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2004. / Includes bibliographical references (leaves 333-356). Also available in electronic version. Access restricted to campus users.
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Some reactions of a,b-Acetylenic acids, esters and N-acylureasCadby, Peter Alan January 1973 (has links)
Reprint of one article by the author bound in back of publication / iii, 199 leaves : ill. ; 26 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.1974) from the Dept. of Organic Chemistry, University of Adelaide
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Some reactions of a,b-Acetylenic acids, esters and N-acylureas.Cadby, Peter Alan. January 1973 (has links) (PDF)
Thesis (Ph.D. 1974) from the Dept. of Organic Chemistry, University of Adelaide. / Reprint of one article by the author bound in back of publication.
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Formation and analysis of tars produced by the pyrolysis of acetylene /Napier, Ian Murray. January 1959 (has links) (PDF)
Thesis (M.Sc.)--University of Adelaide, 1959. / [Typewr.].
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Quantum Chemical Investigations On Acetylenic Carbon Rich Compounds As Molecular Construction Kit/Aydın, Mustafa. Elmacı, Nuran January 2004 (has links)
Thesis (Master)--İzmir Institute of Technology, İzmir, 2004. / Includes bibliographical references (leaves. 76-86).
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Generalized critical points analysis of acetylene vibrational dynamics /Ding, Xinli. January 2004 (has links)
Thesis (Ph. D.)--University of Oregon, 2004. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 145-154). Also available for download via the World Wide Web; free to University of Oregon users.
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