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Institution

DECHEMA

NonprofitFrankfurt am Main, Germany
About: DECHEMA is a nonprofit organization based out in Frankfurt am Main, Germany. It is known for research contribution in the topics: Corrosion & Oxide. The organization has 756 authors who have published 1307 publications receiving 25693 citations.
Topics: Corrosion, Oxide, Coating, Alloy, Catalysis


Papers
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Journal ArticleDOI
Volkmar G. Gundelach1
TL;DR: In this article, the state of the art and future developments of sensors, mainly in the chemical industry, are surveyed, with existing requirements compared with solutions becoming possible by means of present or developing new technologies and measuring concepts.
Abstract: Trends in the development of sensors in chemical engineering. The present article surveys the state of the art and future developments of sensors, mainly in the chemical industry. Existing requirements are compared with solutions becoming possible by means of present or developing new technologies and measuring concepts. The discussion covers a wide range, from sensors for classical state variables to sensors for the determination of concentrations and biotechnological variables. It includes data communication and modern process control. Among new technologies microelectronics and integrated microcomputers are rated highest; in addition possible uses of electrooptics and glass fiber techniques are mentioned as well as solid state and biochemical components. Within the new concepts, measurements based on modelling and multisensor systems have gained a firm position in practical applications.

3 citations

Journal ArticleDOI
B. Öztürk1, L. Mengis1, D. Dickes2, Uwe Glatzel2, Mathias C. Galetz1 
TL;DR: In this paper, the authors examined the oxide morphology of TiO2/Al2O3 in dry air and air containing 10 vol.% H2O at 500, 600 and 700°C for up to 500h.
Abstract: The Ti-6Al-4V alloy is extensively used in aerospace, automotive and biomaterial applications. In the aerospace industry, the service temperature of Ti-6Al-4V is currently limited to 350 °C due to its insufficient oxidation resistance. Oxidation at higher temperatures causes the formation of a fast-growing oxide scale and an oxygen-enriched subsurface layer, which is known as the “alpha-case.” Additionally, the effect of water vapor on the oxidation behavior is critical. In the present study, the oxidation behavior of Ti-6Al-4V in dry air and air containing 10 vol.% H2O at 500, 600 and 700 °C for up to 500 h has been investigated. The main focus of this study is the examination of the different oxide scale morphologies along with the oxygen enrichment in the subsurface zone. It has been observed that spallation of the oxide scale is more severe in a water vapor-containing environment. In dry air, the oxide morphology shows the typical layered TiO2/Al2O3 structure after exposure at 700 °C for 300 h, while Al2O3 precipitates are present in the outermost part of the TiO2 scale when oxidized in wet air. This indicates that the solubility and diffusivity of Al3+ ions in TiO2 are influenced by water vapor. In addition, the extent of oxygen enrichment in the subsurface zone (alpha-case) as a function of temperature and time is determined by nanoindentation profiles. It was shown that in contrast to the scale formation, the alpha-case thickness is not affected by the presence of water vapor in the atmosphere.

3 citations

Journal ArticleDOI
TL;DR: A model system is used to study the reaction engineering fundamentals of the biological waste gas scrubbing process, and some kinetic measurements of the biodegradation of pollutants dissolved in the absorbent are presented.
Abstract: A model system is used to study the reaction engineering fundamentals of the biological waste gas scrubbing process, and some kinetic measurements of the biodegradation of pollutants dissolved in the absorbent are presented.

3 citations

Book ChapterDOI
01 Jan 1980
TL;DR: In this article, the authors investigated both adsorption equilibria and adsroption kinetics for both the original and derivatized trypsin on silica carriers.
Abstract: Adsorption of trypsin on silica carriers has been investigated Both adsorption equilibria and adsroption kinetics are different for the original and for the derivatized carriers The kinetic control of immobilization leads to an optimized catalyst design

3 citations


Authors

Showing all 760 results

NameH-indexPapersCitations
Wolf B. Frommer10534530918
Michael W. Anderson10180863603
João Rocha93152149472
Martin Muhler7760625850
Michael Hunger6029511370
Ivars Neretnieks442247159
Michael Schütze403436311
Jens Schrader381294239
Roland Dittmeyer312063762
Lei Li291984003
Dirk Holtmann291073033
Lasse Greiner26741994
Klaus-Michael Mangold23571590
A. Rahmel23591967
Gerhard Kreysa22781305
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
20227
202145
202053
201949
201844