| 2 | Author
| CrI. Simionescu, S. Dumitriu, V. I. Popa | Requires cookie* | | Title
| im kalten Plasma The Mechanism and Kinetics of Methane-Water Mixture Decomposition in Cold Plasma  | | | Abstract
| In the present paper the mechanism and kinetics of methane-water mixtures decompo-sition in cold plasma are discussed. It was found that nature and composition of the products depend on reaction time, ratio of the two components, and how long the products are in contact after the decomposition was performed. Reactions in the decomposition system generally follow two mechanisms: corresponding to the discharge phase and to postreaction one. The highest yield of formaldehyde was obtained for the ratio methane water of 0.6-1 and two minutes of discharge. Die Bildung von Formaldehyd aus den hypothe-tischen Bestandteilen der Uratmosphäre wurde von LÖB 1 noch im Jahre 1906 in den dmch elektrische Entladungen in einer Mischung von Kohlendioxyd und Wasser entstandenen Produkten nachgewiesen. Später erwähnt derselbe Verfasser die Erzeugung von Glycin über Formaldehyd in einem aus Kohlen-mon-oder -dioxyd, Ammoniak und Wasser beste-henden System. Die Verwendung anderer Systeme (CO + H2; | | |
Reference
| (Z. Naturforsch. 31b, 466—471 [1976]; eingegangen am 5. November 1975) | | |
Published
| 1976 | | |
Keywords
| Methane-Water, Decomposition, Formaldehyde, Mechanism, Kinetics | | |
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| default:Reihe_B/31/ZNB-1976-31b-0466.pdf | | | Identifier
| ZNB-1976-31b-0466 | | | Volume
| 31 | |
3 | Author
| H. Oppermann, M. Zhang, C. Hennig, HeinzDieter Lutz | Requires cookie* | | Title
| Thermochemisches und kalorisches Verhalten von NdA^Cl^ Thermochemical and Calorical Behaviour of NdAl3C l12  | | | Abstract
| The thermodynamical data of solid and gaseous aluminium neodymium chloride have been obtained by determination of the decomposition equilibria (of solid) from total pressure mea surements and chemical transport reactions (gaseous). The melting diagram was determined by DTA. The enthalpy of formation of the solid phase was calculated from their heats of solution and from the enthalpies of formation and the heats of solution of NdCl3 and A1C13. Data by total pressure measurement: ^ H |(N d A l3Cl,2<f<298) = -749,6 ± 2,5 kcal/mol; S°(NdAl3C l12ifj298) = 118,2 ± 3,0 cal/K-mol. Data by solution calorimetry: zAHß(NdAl3C l|2 1298) = -748,6 ± 1,3 kcal/mol. Data by chemical transport: zAH£(NdAl3C l12>g,298) = -701,5 ± 3,0 kcal/mol; S°(NdAl3Cl12-g,298) = 215,0 ± 4,0 cal/K-mol. | | |
Reference
| Z. Naturforsch. 53b, 1343—1351 (1998); eingegangen am 21. Juli 1998 | | |
Published
| 1998 | | |
Keywords
| Aluminium Neodymium Chloride, Decomposition, Thermochemical Data, Enthalpy, Entropy | | |
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| default:Reihe_B/53/ZNB-1998-53b-1343.pdf | | | Identifier
| ZNB-1998-53b-1343 | | | Volume
| 53 | |
4 | Author
| M. Aria Maneva, M. Itko Georgiev, Norbert Lange, HeinzDieter Lutz | Requires cookie* | | Title
| Zur Kenntnis von Berylliumiodat und -periodat - Röntgenographische, IR-und Raman-spektroskopische Untersuchungen On Beryllium Iodates and Periodates -X-Ray, IR , and R am an Studies  | | | Abstract
| Phase relationships and therm al decomposition of beryllium iodates and periodates were studied by X-ray and spectroscopic (IR, Ram an) measurements. B e(I03)2-4 H 20 , B e(I03)2, and Be(H4I 0 6)2-4 H 20 have been characterized. Be(H4I 0 6)2-4 H 20 (hitherto claimed in the lit erature to be a metaperiodate) dehydrates on heating with decomposition to form B e(I03)2. Anhydrous beryllium periodate was not obtained. On dehydration of B e(I0 3)2-4 H 20 , an hydrous B e(I03)2 is formed, which decomposes into BeO, I2, and 0 2 on further heating. | | |
Reference
| Z. Naturforsch. 46b, 795—799 (1991); eingegangen am 27. November 1990 | | |
Published
| 1991 | | |
Keywords
| Iodates, Periodates, Beryllium, Decomposition, IR Spectra, Ram an Spectra | | |
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| default:Reihe_B/46/ZNB-1991-46b-0795.pdf | | | Identifier
| ZNB-1991-46b-0795 | | | Volume
| 46 | |
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