In:
Bulletin of the Korean Chemical Society, Wiley, Vol. 39, No. 4 ( 2018-04), p. 540-547
Abstract:
In this article, the hydrothermal stability and change in the physicochemical properties of supported cobalt catalysts modified with Zn, P, and Zr have been studied for slurry‐phase Fischer–Tropsch synthesis (FTS) at 230°C and 2.0 MPa. The Co/P/γ‐Al 2 O 3 exhibited weaker interactions between cobalt oxides and alumina support than other catalysts. The support of all the Co catalysts underwent phase transformation of γ‐Al 2 O 3 into boehmite (AlO(OH)) during hydrothermal treatment at 250°C for 12 h, except Co/P/γ‐Al 2 O 3 , which was hydrothermally stable in the presence of H 2 O. The initial CO conversion increased with increasing number of Co surface sites during FTS. However, CO conversion decreased when H 2 O was cofed, causing a shift in product distribution from C2–C4 to C5+ hydrocarbons. The CO conversion and product distribution were partially reversible at 0–42.7% H 2 O in the feed stream. The lower adsorption capacity of H 2 O on the catalysts caused higher CO conversions under H 2 O‐rich condition. The catalytic activity of Co/P/γ‐Al 2 O 3 was least affected by the co‐fed H 2 O, while that of Co/Zr/γ‐Al 2 O 3 was strongly influenced by H 2 O concentration in the feed stream. The Co/P/γ‐Al 2 O 3 did not exhibit phase transformation of γ‐Al 2 O 3 to AlO(OH) during slurry‐phase FTS.
Type of Medium:
Online Resource
ISSN:
1229-5949
,
1229-5949
DOI:
10.1002/bkcs.2018.39.issue-4
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2056474-0
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