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Title: Separation of Fischer-Tropsch Wax Products from Ultrafine Iron Catalyst Particles

Abstract

In the previous reporting period, modifications were completed for integrating a continuous wax filtration system for a 4 liter slurry bubble column reactor. During the current reporting period, a shakedown of the system was completed. Several problems were encountered with the progressive cavity pump used to circulate the wax/catalyst slurry though the cross-flow filter element and reactor. During the activation of the catalyst with elevated temperature (> 270 C) the elastomer pump stator released sulfur thereby totally deactivating the iron-based catalyst. Difficulties in maintaining an acceptable leak rate from the pump seal and stator housing were also encountered. Consequently, the system leak rate exceeded the expected production rate of wax; therefore, no online filtration could be accomplished. Work continued regarding the characterization of ultra-fine catalyst structures. The effect of carbidation on the morphology of iron hydroxide oxide particles was the focus of the study during this reporting period. Oxidation of Fe (II) sulfate results in predominantly {gamma}-FeOOH particles which have a rod-shaped (nano-needles) crystalline structure. Carbidation of the prepared {gamma}-FeOOH with CO at atmospheric pressure produced iron carbides with spherical layered structure. HRTEM and EDS analysis revealed that carbidation of {gamma}-FeOOH particles changes the initial nano-needles morphology and generates ultrafinemore » carbide particles with irregular spherical shape.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
University Of Kentucky
Sponsoring Org.:
USDOE
OSTI Identifier:
896672
DOE Contract Number:  
FC26-03NT41965
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; FISCHER-TROPSCH SYNTHESIS; CATALYSTS; WAXES; SEPARATION PROCESSES; IRON CARBIDES; IRON HYDROXIDES; FILTRATION; MORPHOLOGY

Citation Formats

James K. Neathery, Gary Jacobs, Amitava Sarkar, Adam Crawford, and Burtron H. Davis. Separation of Fischer-Tropsch Wax Products from Ultrafine Iron Catalyst Particles. United States: N. p., 2006. Web. doi:10.2172/896672.
James K. Neathery, Gary Jacobs, Amitava Sarkar, Adam Crawford, & Burtron H. Davis. Separation of Fischer-Tropsch Wax Products from Ultrafine Iron Catalyst Particles. United States. doi:10.2172/896672.
James K. Neathery, Gary Jacobs, Amitava Sarkar, Adam Crawford, and Burtron H. Davis. Sat . "Separation of Fischer-Tropsch Wax Products from Ultrafine Iron Catalyst Particles". United States. doi:10.2172/896672. https://www.osti.gov/servlets/purl/896672.
@article{osti_896672,
title = {Separation of Fischer-Tropsch Wax Products from Ultrafine Iron Catalyst Particles},
author = {James K. Neathery and Gary Jacobs and Amitava Sarkar and Adam Crawford and Burtron H. Davis},
abstractNote = {In the previous reporting period, modifications were completed for integrating a continuous wax filtration system for a 4 liter slurry bubble column reactor. During the current reporting period, a shakedown of the system was completed. Several problems were encountered with the progressive cavity pump used to circulate the wax/catalyst slurry though the cross-flow filter element and reactor. During the activation of the catalyst with elevated temperature (> 270 C) the elastomer pump stator released sulfur thereby totally deactivating the iron-based catalyst. Difficulties in maintaining an acceptable leak rate from the pump seal and stator housing were also encountered. Consequently, the system leak rate exceeded the expected production rate of wax; therefore, no online filtration could be accomplished. Work continued regarding the characterization of ultra-fine catalyst structures. The effect of carbidation on the morphology of iron hydroxide oxide particles was the focus of the study during this reporting period. Oxidation of Fe (II) sulfate results in predominantly {gamma}-FeOOH particles which have a rod-shaped (nano-needles) crystalline structure. Carbidation of the prepared {gamma}-FeOOH with CO at atmospheric pressure produced iron carbides with spherical layered structure. HRTEM and EDS analysis revealed that carbidation of {gamma}-FeOOH particles changes the initial nano-needles morphology and generates ultrafine carbide particles with irregular spherical shape.},
doi = {10.2172/896672},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Sep 30 00:00:00 EDT 2006},
month = {Sat Sep 30 00:00:00 EDT 2006}
}

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