Accession Number:



Heterogeneously Catalyzed Endothermic Fuel Cracking

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

Trustees of the Colorado School of MinesUnited Technologies Research CenterUniversity of Delaware COLORADO SCHOOL OF MINES GOLDEN

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Project objective was to develop and apply experimental and computational methodologies that can lead to design of improved supercritical fuelcatalystheat exchanger systems for cooling hypersonic vehicles. Advances in catalytic studies include 1 Developed and applied modeling and software tools to high-pressure chemically reacting processes, including supercritical behavior. 2 Developed models to evaluate influence of low levels of steam addition for reducing production of polyaromatics and mitigating catalyst-fouling carbon deposits. 3 Developed new microstructural models to represent catalytic performance in washcoated monolith structures. 4 Measured impact of Pt-exchanged H-ZSM-5 on heptane conversion and selectivity. 5 Mesured impact of cesium ion exchange for protons in PtH-ZSM-5 catalysts. 6 Carried out high-pressure kinetic studies of hydrocarbon cracking reactions over MoCx nanoparticles supported on non-Acidic Zeolites, specifically H-ZSM-5 zeolites. 7 Conducted fundamental investigations of catalysts using kinetic studies of methane activation, X-ray absorption spectroscopy and transmission electron microscopy. 8 Designed aluminosilicate zeolite-based catalyst model systems using combined experimentaltheoretical methodologies. 9 Performed tailored real-time spectroscopic catalytic reactor studies with n-pentane and nheptane. 10 Applied density functional calculations to characterize catalyst model systems with varying SiAl ratios. Advances in high-pressure gas phase pyrolysis include1 Measured ethane, pentane and hexane pyrolysis over range of pressures, temperatures and residence times. 2 Comparisons of conversion, major product distributions and molecular weight growth processes to detailed kinetic mechanisms demonstrate that mechanism can properly account for wide variations in pressure, including supercritical pressures.Successfully tested candidate catalysts under supercritical fuel c


Subject Categories:

  • Operations Research
  • Fuels
  • Thermodynamics
  • Physical Chemistry

Distribution Statement:

[A, Approved For Public Release]