|
|
|
Formation of coke in thermal cracking of jet
fuel under supercritical conditions |
| ZHU Yuhong, YU Caixiang, LI Zimu, MI Zhentao, ZHANG Xiangwen |
| Key Laboratory of Green Chemical Technology, School of Chemical Engineering and Technology, Tianjin University; |
|
|
|
|
Abstract Continuous-flow reactor experiments were carried out to study coke formation from thermal cracking of home-made jet fuel RP-3 under supercritical conditions. The mechanism and precursor of coke forming were analyzed. The starting cracking temperature of RP-3 fuel was determined to be 471.8°C by differential scanning calorimetry (DSC). Temperature-programmed oxidation and scanning electron microscopy (SEM) characterizations of the stressed tubes showed that there are three different coke species including chemisorbed carbon, amorphous carbon and filamentous coke in the solid deposits. More than 90% of coke deposits are carried away by the supercritical fluid, which has strong capabilities of extraction for coke deposits and their precursors. There were 17.1 wt-% of iron and 11.1 wt-% of chromium found on the coke surface detected by energy dispersive spectroscopy (EDS) which suggests carburetion on alloy. RP-3 fuel and its cracking liquids were analyzed by GC-MS,which showed that the content of alkyl benzene and alkyl naphthalene increased evidently in cracking liquids.
|
|
Issue Date: 05 March 2008
|
|
| 1 |
He F Yu T Li Y Research on endothermic hydrocarbon fuelsMissiles and Space Vehicles 2005 12629(in Chinese)
|
| 2 |
Fan Q Oxidationand cracking of endothermic fuels. Dissertation for the Master Degree. Tianjin: Tianjin University 2002 1–25(in Chinese)
|
| 3 |
Edwards T Crackingand deposition behavior of supercritical hydrocarbon aviation fuelsCombust Sci Technol 2006 178307334
|
| 4 |
Wang J Effectsof hydrogen donors and coking-inhibitors on pyrolytic deposition ofendothermic fuels under supercritical condition. Dissertation forthe Master DegreeTianjinTianjin University 2006 1–13(in Chinese)
|
| 5 |
Wickham D T Engel J R Karpuk M E Additives to prevent filamentous coke formation in endothermicheat exchangersPrepr Pap-Am Chem Soc, DivPet Chem 2000 45459464
|
| 6 |
Andresen J M Storhm J J Sun L Song C Relationshipbetween the formation of aromatic compounds and solid deposition duringthermal degradation of jet fuels in the pyrolytic regimeEnergy Fuels 2001 15714723
|
| 7 |
Guo Y He L Fang W Lin R Study on pyrolysis-crackingcoke of endothermic hydrocarbons fuelsJournalof Fuel Chemistry and Technology 2003 31300304(in Chinese)
|
| 8 |
Sun Q Measurmentsand estimation of critical properties of advanced aviation fuels.Dissertation for the Master DegreeTianjinTianjin University 2006 51(in Chinese)
|
| 9 |
Altin O Eser S Analysis of solid depositsfrom thermal stressing of a JP-8 fuel on different tube surfaces ina flow reactoInd Eng Chem Res 2001 40642648
|
| 10 |
Wickham D T Atria J V Engel J R Formation of carbonaceous deposits in a model Jet fuelunder pyrolysis conditionsPrepr Pap-AmChem Soc, Div Pet Chem 1998 43428432
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
