Low severity upgrading of F-T waxes with solid superacids. Quarterly report, June 1, 1993--August 31, 1993
During the last quarter isomerization and hydrocracking of n-hexadecane were carried out in a continuous flow fixed bed reactor described in a previous report. Test runs showed that the temperature and pressure in this reactor can be controlled to within {+-} 1 C and {+-} 2 psig, respectively. The reaction conditions were 160 C and 350 psig constant hydrogen pressure. Interestingly, product distribution from isomerization and hydrocracking of n-hexadecane conducted in this reactor is similar to that obtained from the microreactor experiments. The long-term stability of the Pt/ZrO{sub 2}/SO{sub 4} catalyst was studied using this fixed bed reactor with n-hexadecane as a feedstock. Evidence was obtained that, in the presence of H{sub 2}, the Pt/ZrO{sub 2}/SO{sub 4} catalyst maintains its activity for as long as 96 hours with no evidence of deactivation. The effect of addition of transition metals on the activity of ZrO{sub 2}/SO{sub 4} was compared. Pt and Pd greatly enhanced the hydrotreating activity of ZrO{sub 2}/SO{sub 4}. The activities of Pt/ZrO{sub 2}/SO{sub 4}, Pt/ZrO{sub 2}/MoO{sub 4} and Pt/ZrO{sub 2}/WO{sub 4} catalysts were also compared; it was found that the Pt/ZrO{sub 2}/SO{sub 4} catalyst gave highest activity in isomerization and hydrocracking of long-chain paraffins. The authors also found that, even at high severity conditions, i.e., 300 C/600 psig and 250 C/1,200 psig, the Pt/ZrO{sub 2}/SO{sub 4} catalyst is active.
- Research Organization:
- Pittsburgh Univ., PA (United States). Dept. of Chemical and Petroleum Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-91PC91304
- OSTI ID:
- 10111234
- Report Number(s):
- DOE/PC/91304-T7; ON: DE94004546; BR: AA1525050; TRN: AHC29402%%7
- Resource Relation:
- Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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