The Role of Sulfur in the Thermal Stability of Jet Fuel

Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations ◽

10.1115/99-gt-298 ◽

1999 ◽

Author(s):

David W. Naegeli

Keyword(s):

Thermal Stability ◽

Induction Period ◽

Jet Fuel ◽

Sulfur Compounds ◽

Inhibition Mechanism ◽

Organic Base ◽

Oxidation Inhibitor ◽

Acid Catalyzed ◽

Thermal Stability Of

The autoxidation of Jet A, dodecane, and a dodecane-15%-cumene blend doped with sulfur compounds were studied at 433 K. Oxygen, hydro peroxide and soluble gum were monitored during the autoxidation. Dodecane, cumene, and the dodecane-15%-cumene blend autoxidized rapidly, while Jet A had an induction period followed by a relatively slow post autoxidation. The results suggest that an inhibitor formed early in the post autoxidation of Jet A. Gum formed in the autoxidation of Jet A, whereas none was detected in dodecane, cumene, or dodecane-15% cumene. However, gum was detected in dodecane and dodecane-15% cumene doped with thiols and disulfides. Alkyl thiols and disulfides reduced the rate of autoxidation of dodecane, and there was an induction period in the formation of gum. Traces of sulfur (≈4 ppm) inhibited the autoxidation of dodecane-15% cumene in a way that resembled the post autoxidation of Jet A. Adding an organic base increased the rate of post autoxidation in Jet A and prevented formation of the oxidation inhibitor. An inhibition mechanism is proposed in which phenois are formed via acid-catalyzed decomposition of benzylic hydro peroxides.

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The supercooling ability of calcium nitrate solutions in ethylene glycol

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19892711 ◽

1989 ◽

Vol 54 (10) ◽

pp. 2711-2714

Author(s):

Ivo Sláma ◽

Jarmila Malá

Keyword(s):

Thermal Stability ◽

Ethylene Glycol ◽

Induction Period ◽

Calcium Nitrate ◽

Transformation Diagram ◽

Temperature Transformation ◽

Thermal Stability Of ◽

Nitrate Solutions

The dependence of the induction period of crystallization on the supercooling was determined for the Ca(NO3)2-ethylene glycol system at mole fractions of the former from 0 to 0.049, and treated in terms of the TTT (Time-Temperature-Transformation) diagram. Addition of Ca(NO3)2 to ethylene glycol brings about a substantial increase in the critical induction period of crystallization. The thermal stability of glasses is discussed in terms of the shape and position of the TTT curves.

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The role of the substrate on the mechanical and thermal stability of Pd thin films during hydrogen (de)sorption

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.10.163 ◽

2021 ◽

Vol 46 (5) ◽

pp. 4137-4153

Author(s):

Neha Verma ◽

Rob Delhez ◽

Niek M. van der Pers ◽

Frans D. Tichelaar ◽

Amarante J. Böttger

Keyword(s):

Thin Films ◽

Thermal Stability ◽

Thermal Stability Of

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Mossbauer Study of the Role of Aluminum and Chromium in Nitrogen Implanted Iron

MRS Proceedings ◽

10.1557/proc-235-509 ◽

1991 ◽

Vol 235 ◽

Cited By ~ 2

Author(s):

M. Kopcewicz ◽

J. Jagielski ◽

A. Turos ◽

D. L. Williamson

Keyword(s):

Thermal Stability ◽

Ion Implantation ◽

Metallic Iron ◽

Conversion Electron ◽

Alloying Elements ◽

Mössbauer Study ◽

Conversion Electron Mössbauer Spectroscopy ◽

Conversion Electron Mossbauer Spectroscopy ◽

Thermal Stability Of

ABSTRACTThe role of alloying elements such as Cr and Al in the formation and stability of the nitride phases formed due to N ion implantation into metallic iron was studied by conversion electron Mössbauer spectroscopy (CEMS). The thermal stability of nitride phases upon 1 h annealing was greatly increased as a result of co-implanting either Cr or Al with N as compared to pure α-Fe implanted only with N.

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