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Technology Development For Iron Fischer Tropsch Catalysts Technical Progress Report No 6 December 26 1991 March 31 1992
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Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts. Technical Progress Report No. 6, December 26, 1991--March 31, 1992 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts. Technical Progress Report No. 6, December 26, 1991--March 31, 1992 written by and published by . This book was released on 1992 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this contract are to develop a technology for the production of active and stable iron Fischer-Tropsch catalysts for use in slurry-phase synthesis reactors and to develop a scaleup procedure for large-scale synthesis of such catalysts for process development and long-term testing in slurry bubble-column reactors. With a feed containing H2 and CO in the molar ratio of 0.5 to 1.0 to the slurry bubble-column reactor, the catalyst performance target is 88% CO + H2 conversion at a minimum space velocity of 2.4 NL/hr/gFe. The desired sum of methane and ethane selectivities is no more than 4%, and the conversion loss per week is not to exceed 1%. Contract Tasks are as follows: 1.0--Catalyst development, 1.1--Technology assessment, 1.2--Precipitated catalyst preparation method development, 1.3--Novel catalyst preparation methods investigation, 1.4--Catalyst pretreatment, 1.5--Catalyst characterization, 2.0--Catalyst testing, 3.0--Catalyst aging studies, and 4.0--Preliminary design and cost estimate of a catalyst synthesis facility. This paper reports progress made on catalyst development.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-03 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts. Technical Progress Report No. 4, June 26, 1991--September 26, 1991 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts. Technical Progress Report No. 4, June 26, 1991--September 26, 1991 written by and published by . This book was released on 1992 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The preparation of binderless iron oxide spheres has been achieved by a novel sol-gel forming procedure. The starting material is a solution of iron (III) 2-ethylhexanoate in mineral spirits. This solution is added dropwise to an ammoniacal solution of methanol. The low viscosity of the methanol causes the formation of small droplets of the iron solution. The immiscibility of the mineral spirit solution in the methanol and the difference in surface tensions cause the droplets to assume a spherical shape. The presence of ammonia and water at low levels in the methanol promotes the hydrolysis of the iron (III) 2-ethylhexanoate, which causes the spherical particles to harden. The iron-containing spheres can then be isolated by filtration. These spheres are the first ones reported to be made of 100% iron oxide and prepared without a binder. In the initial preparations, the spheres are 100 to 200?m in diameter. Some problems remain to be resolved with this new method of preparation.
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts: Technical Progress Report No. 11, March 26 - June 26, 1993 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts: Technical Progress Report No. 11, March 26 - June 26, 1993 written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report for Period Ending December 31, 1991 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report for Period Ending December 31, 1991 written by and published by . This book was released on 1991 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report covers two aspects of the catalyst characterization studies: scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Two types of catalysts are the subject of this report: SEM studies with as-received, pretreated and used samples of a Ruhrchemie type catalyst and TEM examination of four crystal structures of FeOOH and Fe3O4.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysis. Quarterly Technical Progress Report No. 4, July 1, 1995--September 30, 1995 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysis. Quarterly Technical Progress Report No. 4, July 1, 1995--September 30, 1995 written by and published by . This book was released on 1996 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The affect of copper promotion on the activity and selectivity of hydrogen pretreated, precipitated iron Fischer-Tropsch catalysts was studied. Fischer-Tropsch synthesis was carried out in the slurry phase in one in one liter continuous stirred tank reactors at a space velocity of 3.lNL h−1 g−1(Fe), H2:CO = 0.7 at either 270°C or 230°C. Catalysts with atomic compositions relative to iron of 10OFe/4.4Si/l. OK and 10OFe/4.4Si/2.6Cu/l. OK were used at 270°C and catalysts with the compositions of 100Fe/4.4Si/4.2K and 10OFe/4.4Si/2.6Cu/4.2K were used at 230°C. XRD and Moessbauer spectroscopy both show that the 10OFe/4.4Si/2.6Cu/l. OK catalyst contained approximately 24% [alpha]-Fe with the remainder Fe3O4 after a 24 h pretreatment with hydrogen at 220°C. Copper promotion was found to substantially increase the activity and productivity of the catalysts. Catalysts promoted with copper reached maximum activity within 100 h of synthesis while catalysts with no copper went through an induction period. The activity of the hydrogen pretreated 10OFe/4.4Si/2.6Cu/1.0K catalyst operated at 270°C was comparable to the activity of the the 100Fe/4.4Si/l. OK catalyst after pretreatment with carbon monoxide or syngas at one atmosphere pressure. However, the activity of the hydrogen pretreated 1O0Fe/4.4Si/2.6Cu/4.2K catalyst at 230°C was found to be substantially lower than the same catalyst pretreated with carbon monoxide or syngas at one atmosphere pressure.
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report, October-December, 1994 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report, October-December, 1994 written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report for Period Ending December 1993 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report for Period Ending December 1993 written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conversion data as a function of time of synthesis for the two catalysts are shown in Figures 2 and 3. In general the precipitated catalyst is more active than the iron carbide catalyst with syn-gas conversions starting at 80% as compared to 50% for the latter; however, both catalysts deactivated with increasing reaction time. A comparison of the C2, C3 and C4 olefin selectivities at 26% CO conversion (precipitated catalyst-336 hr of synthesis, iron carbide catalyst-122 hr of synthesis) are shown in Figure 4. Surprisingly the precipitated catalyst had a higher olefin content than the iron carbide catalyst. It has been reported that a similar iron carbide catalyst has higher selectivity for the production of olefins than a ''conventionally prepared'' Fe/Co catalyst. The discrepancy may be due in part to comparing the olefin selectivity of the two catalysts at different conversions. Their ''conventional catalyst'' had a C2-C4 olefin content of 37% at 72% conversion compared to 86% olefin at 55% conversion for the iron carbide catalyst. In general the olefin selectivity of a catalyst is highest at low conversions. The iron carbide catalyst of this study produces more hydrocarbons than the precipitated catalyst; furthermore, it produces a higher fraction of C3 + (86% vs. 84%) and C5+ (67% vs. 61%) hydrocarbons (Figure 5). Correspondingly, the iron carbide catalyst produces less methane and ethane than the precipitated catalyst (Figure 6). These hydrocarbon and C5+ selectivities are similar to those reported earlier.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1994 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Precipitated Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report, 1 January 1995-31 March 1995 by :
Download or read book Development of Precipitated Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report, 1 January 1995-31 March 1995 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts. Final Technical Report, December 18, 1990-December 17, 1993 by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts. Final Technical Report, December 18, 1990-December 17, 1993 written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Precipitated Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report, April 1, 1995-June 30, 1995 by :
Download or read book Development of Precipitated Iron Fischer-Tropsch Catalysts. Quarterly Technical Progress Report, April 1, 1995-June 30, 1995 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis TECHNOLOGY DEVELOPMENT FOR IRON FISCHER-TROPSCH CATALYSIS. by :
Download or read book TECHNOLOGY DEVELOPMENT FOR IRON FISCHER-TROPSCH CATALYSIS. written by and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the proposed work is the development of iron-based Fischer-Tropsch catalysts that combined high activity, selectivity and life with physical robustness for slurry phase reactors that will produce either low-alpha or high-alpha products. The catalyst that is developed will be suitable for testing at the Advanced Fuels Development Facility at LaPorte, Texas or similar sized plant. Previous work by the offeror has produced a catalyst formulation that is 1.5 times as active as the ''standard-catalyst'' developed by German workers for slurry phase synthesis. The proposed work will optimize the catalyst composition and pretreatment operation for this low-alpha catalyst. In parallel, work will be conducted to design a high-alpha iron catalyst that is suitable for slurry phase synthesis. Studies will be conducted to define the chemical phases present at various stages of the pretreatment and synthesis stages and to define the course of these changes. The oxidation/reduction cycles that are anticipated to occur in large, commercial reactors will be studied at the laboratory scale. Catalyst performance will be determined for catalysts synthesized in this program for activity, selectivity and aging characteristics.
Book Synopsis Technology Development for Iron Fischer-Tropsch Catalysts by :
Download or read book Technology Development for Iron Fischer-Tropsch Catalysts written by and published by . This book was released on 1992 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The preparation of binderless iron oxide spheres has been achieved by a novel sol-gel forming procedure. The starting material is a solution of iron (III) 2-ethylhexanoate in mineral spirits. This solution is added dropwise to an ammoniacal solution of methanol. The low viscosity of the methanol causes the formation of small droplets of the iron solution. The immiscibility of the mineral spirit solution in the methanol and the difference in surface tensions cause the droplets to assume a spherical shape. The presence of ammonia and water at low levels in the methanol promotes the hydrolysis of the iron (III) 2-ethylhexanoate, which causes the spherical particles to harden. The iron-containing spheres can then be isolated by filtration. These spheres are the first ones reported to be made of 100% iron oxide and prepared without a binder. In the initial preparations, the spheres are 100 to 200[mu]m in diameter. Some problems remain to be resolved with this new method of preparation.
Book Synopsis Moessbauer Spectroscopy Studies of Iron-catalysts Used in Fischer-Tropsch (FT) Processes. Quarterly Technical Progress Report, April--June, 1994 by :
Download or read book Moessbauer Spectroscopy Studies of Iron-catalysts Used in Fischer-Tropsch (FT) Processes. Quarterly Technical Progress Report, April--June, 1994 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Moessbauer spectroscopy investigations were carried out on 16 iron-based catalysts during the period under review. A set of 10 samples subjected to different pretreatments and Fischer-Tropsch synthesis were investigated to understand the effect of reduction in different gas atmospheres on the iron phases formed. Another set of 5 catalysts pretreated in CO and subjected to Fischer-Tropsch synthesis using two kinds of wax viz., (a) a low molecular wt. wax and (b) heavy wax were also studied. Although it is difficult to draw any definite conclusions from the data, some plausible trends are noticed: (1) pretreatment of a catalyst in H[sub 2] leads to the formation of[var-epsilon]-carbide; (2) pretreatment of a catalyst in H[sub 2]/CO leads to the formation of[chi]-carbide; (3) reduction of UCI-1185-149-2ND catalyst in CO leads to the formation of[chi]-carbide; and (4) reduction of DOE catalysts in CO leads to the formation of[var-epsilon]-carbide. Data are presented on the phases found in the various catalysts.
Book Synopsis Moessbauer Spectroscopy Studies of Iron-catalysts Used in Fischer-Tropsch (FT) Processes. Quarterly Technical Progress Report, January-March, 1995 by :
Download or read book Moessbauer Spectroscopy Studies of Iron-catalysts Used in Fischer-Tropsch (FT) Processes. Quarterly Technical Progress Report, January-March, 1995 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
