Novel sorbents for high temperature regenerative H2S removal
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Flytzani-Stephanopoulos, M.↗
Engineering topics
Flytzani-Stephanopoulos, M.
Publications and source records attributed to Flytzani-Stephanopoulos, M..
Autothermal reforming of aliphatic and aromatic hydrocarbon liquids
Results are presented from a study of the autothermal reforming of paraffins and aromatics over nickel catalysts. The trials were performed to examine the carbon products that appear when steam is passed over hydrocarbon liquids to form H2-rich gases, i.e., the autothermal process (ATR). Attention was given to n-hexane, n-tetradecane, benzene, and benzene solutions of naphthalene with reactant preheat to 1000-1150 F. The carbon-formation limit was sought as a function of the steam-to-carbon and oxygen to carbon molar ratios at constant pressure and the preheat temperatures. The catalyst bed was examined after each trial to identify the locations and types of carbon formed using SEM, thermal gravimetric analysis, and X ray diffraction techniques. The hydrocarbon fuels each had a separate temperature and reaction profile, as well as carbon formation characteristics. No carbon formation was observed in the upper layer of the reactor bed, while both gas phase and surface-grown deposits were present in the lower part. The results are concluded of use in the study of No. 2 fuel oil for ATR feedstock.
Flytzani-Stephanopoulos, M.↗
Catalytic autothermal reforming increases fuel cell flexibility
Experimental results are presented for the autothermal reforming (ATR) of n-hexane, n-tetradecane, benzene and benzene solutions of naphthalene. The tests were run at atmospheric pressure and at moderately high reactant preheat temperatures in the 800-900 K range. Carbon formation lines were determined for paraffinic and aromatic liquids. Profiles were determined for axial bed temperature and composition. Space velocity efforts were assessed, and the locations and types of carbon were recorded. Significant reactive differences between hydrocarbons were identified. Carbon formation characteristics were hydrocarbon specific. The differing behavior of paraffinic and aromatic fuels with respect to their carbon formation may be important in explaining the narrow range of carbon-free operating conditions found in the ATR of number two fuel oil.
Flytzani-Stephanopoulos, M.↗
Conversion of hydrocarbons for fuel cell applications. Part 1: Autothermal reforming of sulfur-free and sulfur-containing hydrocarbon liquids. Part 2: Steam reforming of n-hexane on pellet and monolithic catalyst beds
The autothermal reforming process for conversion of various hydrocarbons to hydrogen and the use of monolithic catalyst beds in the steam reforming of n-hexane are described.
Flytzani-Stephanopoulos, M.↗