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Sulfur Removal In Advanced Two Stage Pressurized Fluidized Bed Combustion Technical Report September 1 November 30 1994
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Book Synopsis Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, September 1--November 30, 1994 by :
Download or read book Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, September 1--November 30, 1994 written by and published by . This book was released on 1994 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to obtain data on the rates and the extent of sulfation reactions involving partially sulfided calcium-based sorbents, and oxygen as well as sulfur dioxide, at operating conditions closely simulating those prevailing in the second stage (combustor) of Advanced Two-Stage Pressurized Fluidized-Bed Combustors (PFBC). In these systems the CO2 partial pressure generally exceeds the equilibrium value for calcium carbonate decomposition. Therefore, calcium sulfate is produced through the reactions between SO2 and calcium carbonate as well as the reaction between calcium sulfide and oxygen. To achieve this objective, the rates of reaction involving SO2 and oxygen (gaseous reactant); and calcium sulfide and calcium carbonate (solid reactants), will be determined by conducting tests in a pressurized thermogravimetric analyzer (HPTGA) unit. The effects of sorbent type, sorbent particle size, reactor temperature and pressure; and O2 as well as SO2 partial pressures on the sulfation reactions rate will be determined. During this quarter, samples of the selected limestone and dolomite were sulfided in the fluidized-bed reactor. These tests were conducted in both calcining and non-calcining operating conditions to produce partially-sulfided sorbents containing calcium oxide and calcium carbonate, respectively. These samples which represent the carbonizer discharge material, will be used as the feed material in the sulfation tests to be conducted in the HPTGA unit during the next quarter.
Book Synopsis Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, December 1, 1994--February 28, 1995 by :
Download or read book Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, December 1, 1994--February 28, 1995 written by and published by . This book was released on 1996 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to obtain data on the rates and the extent of sulfation reactions involving partially sulfided calcium-based sorbents, and oxygen as well as sulfur dioxide, at operating conditions closely simulating those prevailing in the second stage (combustor) of Advanced Two-Stage Pressurized Fluidized-Bed Combustors (PFBC). In these systems the CO2 partial pressure generally exceeds the equilibrium value for calcium carbonate decomposition. Therefore, calcium sulfate is produced through the reactions between SO2 and calcium carbonate as well as the reaction between calcium sulfide and oxygen. To achieve this objective, the rates of reaction involving SO2 and oxygen (gaseous reactant); and calcium sulfide and calcium carbonate (solid reactants), will be determined by conducting tests in a pressurized thermogravimetric analyzer (HPTGA) unit. The effects of sorbent type, sorbent particle size, reactor temperature and pressure; and O2 as well as SO2 partial pressures on the sulfation reactions rate will be determined. During this quarter, samples of the selected limestone and dolomite, sulfided in the fluidized-bed reactor during last quarter, were analyzed. The extent of sulfidation in these samples was in the range of 20 to 50%, which represent carbonizer discharge material at different operating conditions. The high pressure thermogravimetric analyzer (BPTGA) unit has been modified and a new pressure control system was installed to eliminate pressure fluctuation during the sulfation tests.
Book Synopsis Sulfur Removal in Advanced Two-stage Fluidized-bed Combustion. [Quarterly] Technical Report, December 1, 1993--February 28, 1994 by :
Download or read book Sulfur Removal in Advanced Two-stage Fluidized-bed Combustion. [Quarterly] Technical Report, December 1, 1993--February 28, 1994 written by and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to obtain data on the rates of reaction between, hydrogen sulfide (H2S) and uncalcined calcium-based sorbents under operating conditions relevant to first stage (carbonizer) of Advanced Two-Stage Pressurized Fluidized-Bed Combustors (PFBC). In these systems the CO2 partial pressure in the first stage generally exceeds the equilibrium value for calcium carbonate decomposition. Therefore, removal of sulfur compounds takes place through the reaction between H2S and calcium carbonate. To achieve this objective the rates of reaction between hydrogen sulfide and uncalcined calcium-based sorbents will be determined by conducting tests in pressurized thermogravimetric analyzer (TGA) and high-pressure/high-temperature fluidized-bed reactor (HPTR) units. The effects of sorbent type, sorbent particle size, reactor temperature and pressure, and CO2 and H2S partial pressures on the sulfidation reaction rate will be determined. During this quarter, the high-pressure thermogravimetric analyzer (HPTGA) unit was installed and the shakedown process was completed. Several tests were conducted in the HPTGA unit to establish the operating procedure and the repeatability of the experimental results. Sulfidation by conducting the baseline sulfidation tests. The results are currently being analyzed.
Book Synopsis Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, 1 March--31 May 1994 by :
Download or read book Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, 1 March--31 May 1994 written by and published by . This book was released on 1994 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to obtain data on the rates of reaction between hydrogen sulfide (H2S) and uncalcined calcium-based sorbents under operating conditions relevant to first stage (carbonizer) of Advanced Two-Stage Pressurized Fluidized-Bed Combustors (PFBC). In these systems the CO2 partial pressure in the first stage generally exceeds the equilibrium value for calcium carbonate decomposition. Therefore, removal of sulfur compounds takes place through the reaction between H2S and calcium carbonate. To achieve this objective, the rates of reaction between hydrogen sulfide and uncalcined calcium-based sorbents will be determined by conducting tests in pressurized thermogravimetric analyzer (TGA) and high-pressure/high-temperature fluidized-bed reactor (HPTR) units. The effects of sorbent type, sorbent particle size, reactor temperature and pressure, and CO2 and H2S partial pressures on the sulfidation reaction rate will be determined. During this quarter a series of sulfidation tests were conducted in the high-pressure/high-temperature fluidized-bed reactor (HPTR) units. The effects of sorbent type, sorbent particle size, reactor temperature and pressure, and CO2 and H2S partial pressures on the sulfidation reaction rate will be determined. During this quarter a series of sulfidation tests were conducted in the high-pressure high-temperature thermogravimetric analyzer (HPTGA unit) using limestone and dolomite. The results suggest that half-calcined dolomite is much more reactive than uncalcined limestone. Also, temperature in the range of 800 to 950 C did not significantly affect the sulfidation reaction rates for both limestone and dolomite.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, March 1--May 31, 1995 by :
Download or read book Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion. Technical Report, March 1--May 31, 1995 written by and published by . This book was released on 1995 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to obtain data on the rates and the extent of sulfation reactions involving partially sulfided calcium-based sorbents, and oxygen as well as sulfur dioxide, at operating conditions closely simulating those prevailing in the second stage (combustor) of Advanced Two-Stage Pressurized Fluidized-Bed Combustors. In these systems the CO2 partial pressure generally exceeds the equilibrium value for calcium carbonate decomposition. Therefore, calcium sulfate is produced through the reactions between SO2 and calcium carbonate as well as the reaction between calcium sulfide and oxygen. To achieve this objective, the rates of reaction involving SO2 and oxygen, calcium sulfide and calcium carbonate will be determined by conducting tests in a pressurized thermogravimetric analyzer unit. The sulfate tests conducted during this quarter, focused on the determination of the rate of sulfation reaction involving partially sulfided half-calcined dolomite and oxygen. The test parameters included CO2 and O2 concentrations, reaction temperature and pressure, as well as the sorbent particle size. The results obtained during this quarter suggest that the rate of sulfation reaction involving partially sulfided half-calcined dolomite and oxygen is very fast at temperatures above 850 C which rapidly increases with increasing temperature, achieving more than 85% conversion in less than a few minutes. The reaction appears to continue to completion, however, above 85% conversion, the rate of reaction appears to be low, requiring long residence time to reach complete conversion.
Book Synopsis Sulfur Removal in Advanced Two-staged Pressurized Fluidized-bed Combustion ; [Quarterly] Report, September 1--November 1993 by :
Download or read book Sulfur Removal in Advanced Two-staged Pressurized Fluidized-bed Combustion ; [Quarterly] Report, September 1--November 1993 written by and published by . This book was released on 1994 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to obtain data on the rates of reaction between hydrogen sulfide (H2S) and uncalcined calcium-based sorbents under operating conditions relevant to first stage (carbonizer) of Advanced Two-Stage Pressurized Fluidized-Bed Combustors (PFBC). In these systems the CO2 partial pressure in the first stage generally exceeds the equilibrium value for calcium carbonate decomposition. Therefore, removal of sulfur compounds takes place through the reaction between H2S and calcium carbonate. To achieve this objective, the rates of reaction between hydrogen sulfide and uncalcined calcium-based sorbents will be determined by conducting tests in pressurized thermogravimetric analyzer (TGA) and high-pressure/high-temperature fluidized-bed reactor (HPTR) units. The effects of sorbent type, sorbent particle size, reactor temperature and pressure, and CO2 and H2S partial pressures on the sulfidation reaction rate will be determined. A pressurized TGA unit has been purchased by IGT for use in this project.
Book Synopsis Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion by :
Download or read book Sulfur Removal in Advanced Two Stage Pressurized Fluidized Bed Combustion 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 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 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1995 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sulfur Removal in Advanced Two-stage Fluidized-bed Combustion by :
Download or read book Sulfur Removal in Advanced Two-stage Fluidized-bed Combustion written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acid Precipitation written by and published by . This book was released on 1994 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mild Temperature Gasification written by and published by . This book was released on 1993 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bench-scale, mild-temperature fluidized bed gasification (MTFBG) was performed on three high sulfur Illinois basin coals after mixing with phosphoric-acid. The research initiated development of an advanced processing technology which partitions coal sulfur to the gas phase as H2s. The MTFBG experiments were performed on Illinois coals IBC-101, IBC-106 and IBC-110. Product yields were between 60--80% char, 0.41.3% tar and 20--40% gases. Gas yields were sensitive to the coal/acid mixing ratios and the residence time of the coal within the gasifier. Tar and gas yields were significantly lower for coal/acid feeds than for coal-only feeds. At 500°C, the sulfur removal was as high as 82% for IBC-106; sulfur emissions during combustion of this char would be 1.10 lbs SO2/MMBtu. Emission levels from the IBC-110 char would be 1.15 lbs SO2/MMBtu whereas it would be 2.15 lb SO, /MmBtu from the IBC-101 char. In comparison, the emission levels from chars produced during gasification of coal using no acid would be 4.35 (IBC-110) and 4.81 (IBC-101), whereas the emission levels of the parent coals would be between 5--6 lb SO2/MMBtu. Gas product analysis confirmed that the coal sulfur was removed as H2s. Pressurized hot-water filtration of the chars removed nearly 80% of the phosphorus. Its removal rate should be near 95% to restrain the reagent cost to less than $25/Ton of SO2.
Book Synopsis An Introductory Guide to EC Competition Law and Practice by : Valentine Korah
Download or read book An Introductory Guide to EC Competition Law and Practice written by Valentine Korah and published by . This book was released on 1994 with total page 2354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal Abstracts written by and published by . This book was released on 1992 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of a Sulfur Reduction Technique for Mild Gasification Char. Technical Report, September 1, 1991--November 30, 1991 by :
Download or read book Investigation of a Sulfur Reduction Technique for Mild Gasification Char. Technical Report, September 1, 1991--November 30, 1991 written by and published by . This book was released on 1991 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The object of this program is to investigate the desulfurization of mild gasification char using hydrogen/methane mixtures in a laboratory-scale experimental study. In the first year of the two- year program, char is being treated with mixtures of H2 and CH4 at temperatures of 1100°C to 1550°F and pressures of 50 to 100 psig. The effects of temperature, pressure, residence time, gas velocity, and gas composition on sulfur removal and carbon gasification are being determined. The batch experiments are being performed in a nominal 2-inch-ID stainless-steel, batch, fluidized-bed reactor. The char to be desulfurized was produced by the IGT mild gasification process research unit (PRU) in a recently completed DOE/METC-sponsored technology development program. The parent coal was Illinois No. 6 from a preparation plant, and the char from the selected test contains 4.58 wt% sulfur. In the first quarter, we have obtained and prepared a char for the desulfurization tests. Ultimate and proximate analyses were performed on this char, and its pore size distribution and surface area were determined. Also this quarter, the fluidized-bed reactor system was constructed and equipped with high pressure mass flow controllers and a high pressure sintered metal filter to remove fines from the effluent gas stream.
Book Synopsis Sulfur removal in fluidized-bed combustion by : John L. Little
Download or read book Sulfur removal in fluidized-bed combustion written by John L. Little and published by . This book was released on 1977 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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