Titania-supported bimetallic catalysts combined with HZSM-5 for Fischer-Tropsch synthesis

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie970680n· OSTI ID:624314

Jothimurugesan, K ^[1]; Gangwal, S K ^[2]

---

1. Hampton Univ., VA (United States). Dept. of Chemical Engineering
2. Research Triangle Inst., Research Triangle Park, NC (United States)

The Fischer-Tropsch synthesis (FTS) can convert coal or natural gas derived synthesis gas (CO + H{sub 2}) to liquid fuels and high-value chemicals. Fischer-Tropsch synthesis was studied in a fixed-bed reactor over single-metal and bimetallic alloy catalysts, selected from Co, Ni, and Fe, supported on TiO{sub 2} at a total metal loading of 10 wt%. The catalysts, prepared by incipient wetness impregnation using nitrate precursors, were tested as is and in combination with a HZSM-5 zeolite. The test conditions were 1 MPa, 250 C, H{sub 2}/CO = 1, and weight hourly space velocity (WHSV) = 0.77 h{sup {minus}1}. Alloying of metals resulted in a significant enhancement in CO conversion without an increase in methane selectivity. A 50:50 weight ratio Co-Ni catalyst physically mixed with HZSM-5 (5% Co-5% Ni/TiO{sub 2} + HZSM-5) gave the highest CO conversion (45.2%) at the conditions tested. This compares to conversion of 8.9% and 10.5% with Co-only and Ni-only catalysts, respectively. Mixing the Co-Ni catalyst with HZSM-5 resulted in a significant reduction in methane selectivity and a significant increase in C{sub 4}{sup +} selectivity. The aromatic fraction increased from 1.5 to 8.1 wt%, the C{sub 2}{sup +} olefins were nearly eliminated, and i-C{sub 4}H{sub 10} increased from 2.3 to 58.5 wt % in the C{sub 4} fraction.

• OSTI ID: 624314
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 4 Vol. 37; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
03 NATURAL GAS
10 SYNTHETIC FUELS
BIMETALS
CARBON MONOXIDE
CATALYST SUPPORTS
CATALYSTS
COBALT
FISCHER-TROPSCH SYNTHESIS
IRON
METHANATION
NICKEL
PERFORMANCE
TITANIUM OXIDES
ZEOLITES