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Title: Promoter effects on precipitated iron catalysts for Fischer-Tropsch synthesis

Abstract

The effects of potassium and copper promotion on the activity and selectivity of precipitated iron catalysts for Fischer--Tropsch synthesis (FTS) were studied in a fixed bed reactor at 1.48 MPa and 235--265{degrees} C using synthesis gas with a H{sub 2}/CO = 1 molar feed ratio. It was found that both potassium and copper increase the catalyst activity for FTS and the water gas shift reaction. Potassium promotion ({approximately} 0.2--1 wt %) results in an increase in the average molecular weight of hydrocarbon products and suppression of secondary reactions (olefin hydrogenation and isomerization of 1-alkenes to 2-alkenes). Copper promotion ({approximately} 3 wt %) has a similar effect on the hydrocarbon distribution, but it enhances slightly the secondary reactions. The activity of doubly promoted (100 Fe/3 Cu/{ital x}K, {ital x} = 0.2 or 0.5) catalysts was higher than that of singly promoted catalysts and was independent of potassium loading, whereas their selectivity behavior was strongly influenced by their potassium loading. Product selectivities on the 100 Fe/3 Cu/0.2 K catalyst were similar to those of the 100 Fe/3 Cu catalyst, whereas selectivities of the 100 Fe/3 Cu/0.5 K catalyst were similar to those obtained in tests with the 100 Fe/0.5 K catalyst.

Authors:
; ;  [1]
  1. Texas A and M Univ., College Station, TX (USA). Kinetics, Catalysis, and Reaction Engineering Lab.
Publication Date:
OSTI Identifier:
7089895
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research; (USA)
Additional Journal Information:
Journal Volume: 29:2; Journal ID: ISSN 0888-5885
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 08 HYDROGEN; CATALYSTS; CHEMICAL COMPOSITION; FISCHER-TROPSCH SYNTHESIS; IRON; CATALYTIC EFFECTS; CARBON MONOXIDE; COPPER; HYDROGEN; PACKED BED; POTASSIUM; SHIFT PROCESSES; SYNTHESIS GAS; WATER; ALKALI METALS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; FLUIDS; GASES; HYDROGEN COMPOUNDS; METALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENTS; 010408* - Coal, Lignite, & Peat- C1 Processes- (1987-); 400201 - Chemical & Physicochemical Properties; 080108 - Hydrogen- Production- Steam-Iron Process

Citation Formats

Bukur, D B, Mukesh, D, and Patel, S A. Promoter effects on precipitated iron catalysts for Fischer-Tropsch synthesis. United States: N. p., 1990. Web. doi:10.1021/ie00098a008.
Bukur, D B, Mukesh, D, & Patel, S A. Promoter effects on precipitated iron catalysts for Fischer-Tropsch synthesis. United States. doi:10.1021/ie00098a008.
Bukur, D B, Mukesh, D, and Patel, S A. Thu . "Promoter effects on precipitated iron catalysts for Fischer-Tropsch synthesis". United States. doi:10.1021/ie00098a008.
@article{osti_7089895,
title = {Promoter effects on precipitated iron catalysts for Fischer-Tropsch synthesis},
author = {Bukur, D B and Mukesh, D and Patel, S A},
abstractNote = {The effects of potassium and copper promotion on the activity and selectivity of precipitated iron catalysts for Fischer--Tropsch synthesis (FTS) were studied in a fixed bed reactor at 1.48 MPa and 235--265{degrees} C using synthesis gas with a H{sub 2}/CO = 1 molar feed ratio. It was found that both potassium and copper increase the catalyst activity for FTS and the water gas shift reaction. Potassium promotion ({approximately} 0.2--1 wt %) results in an increase in the average molecular weight of hydrocarbon products and suppression of secondary reactions (olefin hydrogenation and isomerization of 1-alkenes to 2-alkenes). Copper promotion ({approximately} 3 wt %) has a similar effect on the hydrocarbon distribution, but it enhances slightly the secondary reactions. The activity of doubly promoted (100 Fe/3 Cu/{ital x}K, {ital x} = 0.2 or 0.5) catalysts was higher than that of singly promoted catalysts and was independent of potassium loading, whereas their selectivity behavior was strongly influenced by their potassium loading. Product selectivities on the 100 Fe/3 Cu/0.2 K catalyst were similar to those of the 100 Fe/3 Cu catalyst, whereas selectivities of the 100 Fe/3 Cu/0.5 K catalyst were similar to those obtained in tests with the 100 Fe/0.5 K catalyst.},
doi = {10.1021/ie00098a008},
journal = {Industrial and Engineering Chemistry Research; (USA)},
issn = {0888-5885},
number = ,
volume = 29:2,
place = {United States},
year = {1990},
month = {2}
}