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Pore Structure And Reactivity Changes In Hot Coal Gas Desulfurization Sorbents Final Report September 1987 January 1991
Download Pore Structure And Reactivity Changes In Hot Coal Gas Desulfurization Sorbents Final Report September 1987 January 1991 full books in PDF, epub, and Kindle. Read online Pore Structure And Reactivity Changes In Hot Coal Gas Desulfurization Sorbents Final Report September 1987 January 1991 ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Pore Structure and Reactivity Changes in Hot Coal Gas Desulfurization Sorbents. Final Report, September 1987--January 1991 by :
Download or read book Pore Structure and Reactivity Changes in Hot Coal Gas Desulfurization Sorbents. Final Report, September 1987--January 1991 written by and published by . This book was released on 1991 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the project was the investigation of the pore structure and reactivity changes occurring in metal/metal oxide sorbents used for desulfurization of hot coal gas during sulfidation and regeneration, with particular emphasis placed on the effects of these changes on the sorptive capacity and efficiency of the sorbents. Commercially available zinc oxide sorbents were used as model solids in our experimental investigation of the sulfidation and regeneration processes.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reactivity and Pore Structure Changes in Hot Coal Gas Desulfurization Sorbents by : Evangelos A. Efthimiadis
Download or read book Reactivity and Pore Structure Changes in Hot Coal Gas Desulfurization Sorbents written by Evangelos A. Efthimiadis and published by . This book was released on 1991 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pore Structure and Reactivity Changes in Hot Coal Gas Desulfurization Sorbents by :
Download or read book Pore Structure and Reactivity Changes in Hot Coal Gas Desulfurization Sorbents written by and published by . This book was released on 1991 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the project was the investigation of the pore structure and reactivity changes occurring in metal/metal oxide sorbents used for desulfurization of hot coal gas during sulfidation and regeneration, with particular emphasis placed on the effects of these changes on the sorptive capacity and efficiency of the sorbents. Commercially available zinc oxide sorbents were used as model solids in our experimental investigation of the sulfidation and regeneration processes.
Book Synopsis Flue Gas Desulfurization and Industrial Minerals by : M. Michael Miller
Download or read book Flue Gas Desulfurization and Industrial Minerals written by M. Michael Miller and published by . This book was released on 1993 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains 4,101 references on FGD [Flue Gas Desulfurization] ... primarily from 1982 through June 1993. Complements the "Flue Gas Desulfurization and Denitrification" bibliography published by the U.S. Dept. of Energy in Jan. 1985. References were located on the Energy, Science and Technology, Pollution Abstracts, and Environmental Bibliography databases. Primarily covers FGD and the use of industrial minerals in the desulfurization process or in by-product utilization and disposal. Emphasizes post-combustion removal of sulfur dioxide through processes such as in-duct injection and wet and dry scrubbing.
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 1992 with total page 1720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hot Coal Gas Desulfurization with Manganese-based Sorbents. Final Report, September 1992--December 1994 by :
Download or read book Hot Coal Gas Desulfurization with Manganese-based Sorbents. Final Report, September 1992--December 1994 written by and published by . This book was released on 1994 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of much current work being performed by the Morgantown Energy Technology Center (METC) of the Department of Energy on hot coal-derived fuel gas desulfurization is in the use of zinc-based sorbents. METC has shown interest in formulating and testing manganese-based pellets as alternative effective sulfur sorbents in the 700 to 1200°C temperature range. To substantiate the potential superiority of Mn-based pellets, a systematic approach toward the evaluation of the desulfurizing power of single-metal sorbents is developed based on thermodynamic considerations. This novel procedure considered several metal-based sorbents and singled out manganese oxide as a prime candidate sorbent capable of being utilized under a wide temperature range, irrespective of the reducing power (determined by CO2/CO ratio) of the fuel gas. Then, the thermodynamic feasibility of using Mn-based pellets for the removal of H2S from hot-coal derived fuel gases, and the subsequent oxidative regeneration of loaded (sulfided) pellets was established. It was concluded that MnO is the stable form of manganese for virtually all commercially available coal-derived fuel gases. In addition, the objective of reducing the H2S concentration below 150 ppMv to satisfy the integrated gasification combined cycle system requirement was shown to be thermodynamically feasible. A novel process is developed for the manufacture of Mn-based spherical pellets which have the desired physical and chemical characteristics required.
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 1992-02 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhanced Sorbent Durability for Hot Coal Gas Desulfurization by : M. C. Jha
Download or read book Enhanced Sorbent Durability for Hot Coal Gas Desulfurization written by M. C. Jha and published by . This book was released on 1986 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Winter Waterfront : Year-round Use in Metropolitan Toronto by : Xenia Klinger
Download or read book Winter Waterfront : Year-round Use in Metropolitan Toronto written by Xenia Klinger and published by . This book was released on 1991 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic and Kinetic Studies of High-temperature Coal Gas Desulfurization Sorbents. Final Report, July 1988--July 1991 by :
Download or read book Mechanistic and Kinetic Studies of High-temperature Coal Gas Desulfurization Sorbents. Final Report, July 1988--July 1991 written by and published by . This book was released on 1991 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this project was to investigate the properties of and evaluate mixed oxides of zinc and titanium for hot fuel gas desulfurization. Uncombined ZnO was also investigated as a base case. Detailed investigation of the reduction and sulfidation reactions of Zn-Ti-O sorbents was performed. The intrinsic kinetics and the product layer diffusion rates in reduction and sulfidation were determined. Kinetic experiments with sorbents containing various Zn/Ti atomic ratios were performed. Chemical phase and structural transformations were followed by various methods. The results were compared to similar experiments performed with ZnO. The purpose of these experiments was to determine how the presence of titanium dioxide affects the reduction and sulfidation of ZnO. This information would be used to identify and select the sorbent composition that gives the best combination of low reduction rate and acceptable sulfidation performance at temperatures exceeding 600°C. (VC).
Book Synopsis Bemerkungen über den prüfenden Blick eines Vaterland liebenden Bürgers, etc by :
Download or read book Bemerkungen über den prüfenden Blick eines Vaterland liebenden Bürgers, etc written by and published by . This book was released on 1801 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hot Coal Gas Desulfurization with Manganese-based Sorbents. Annual Report, September 1992--September 1993 by :
Download or read book Hot Coal Gas Desulfurization with Manganese-based Sorbents. Annual Report, September 1992--September 1993 written by and published by . This book was released on 1993 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of work being performed on Hot Coal Gas Desulfurization at the Morgantown Energy Technology Center is primarily in the use of zinc ferrite and zinc titanate sorbents; however, prior studies at the US Steel Fundamental Research Laboratories in Monroeville, PA, by E.T. Turkdogan indicated that an alternate sorbent, manganese dioxide-containing ore in mixture with alumina (75 wt % ore + 25 wt % Al2O3) may be a viable alternative to zinc-based sorbents. Manganese, for example, has a lower vapor pressure in the elemental state than zinc hence it is not as likely to undergo depletion from the sorbent surface upon loading and regeneration cycles. Also manganese oxide is less readily reduced to the elemental state than iron hence the range of reduction potentials for oxygen is somewhat greater than for zinc ferrite. In addition, thermodynamic analysis of the manganese-oxygen-sulfur system shows it to be less amenable to sulfation than zinc ferrite. Potential also exists for utilization of manganese at higher temperatures than zinc ferrite or zinc titanate. This Annual Topical Report documents progress in pelletizing and testing via thermo-gravimetric analysis of individual pellet formulations of manganese ore/ alumina combinations and also manganese carbonate/alumina with two binders, dextrin and bentonite. It includes the prior Quarterly Technical Reports which indicate that the manganese carbonate material, being of higher purity than the manganese ore, has a higher degree of sulfur capacity and more rapid absorption kinetics. A 2-inch fixed-bed reactor has been fabricated and is now ready for subjecting pellets to cyclic loading and regeneration.
Book Synopsis Hot Coal Gas Desulfurization with Manganese Based Sorbents. Quarterly Report, June-September 1994 by :
Download or read book Hot Coal Gas Desulfurization with Manganese Based Sorbents. Quarterly Report, June-September 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 Development of Advanced Hot-gas Desulfurization Sorbents. Final Report by :
Download or read book Development of Advanced Hot-gas Desulfurization Sorbents. Final Report written by and published by . This book was released on 1997 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to develop hot-gas desulfurization sorbent formulations for relatively lower temperature application, with emphasis on the temperature range from 343--538 C. The candidate sorbents include highly dispersed mixed metal oxides of zinc, iron, copper, cobalt, nickel and molybdenum. The specific objective was to develop suitable sorbents, that would have high and stable surface area and are sufficiently reactive and regenerable at the relatively lower temperatures of interest in this work. Stability of surface area during regeneration was achieved by adding stabilizers. To prevent sulfation, catalyst additives that promote the light-off of the regeneration reaction at lower temperature was considered. Another objective of this study was to develop attrition-resistant advanced hot-gas desulfurization sorbents which show stable and high sulfidation reactivity at 343 to 538 C and regenerability at lower temperatures than leading first generation sorbents.
Book Synopsis Kinetics of Mn-based Sorbents for Hot Coal Gas Desulfurization. Quarterly Progress Report, March 15, 1995--July 15, 1995 by :
Download or read book Kinetics of Mn-based Sorbents for Hot Coal Gas Desulfurization. Quarterly Progress Report, March 15, 1995--July 15, 1995 written by and published by . This book was released on 1995 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hot gas desulfurization may be accomplished by using solid sorbents such as oxides of those metals that form stable sulfides. The effectiveness of a desulfurizing agent in treating such gases is related to the predicted equilibrium partial pressure of hydrogen sulfide which will be present in a phase combination of the reduced form of sulfide and oxide phases. The focus of much current work being performed by the Department of Energy on sorbent development is in the use of zinc ferrite, zinc titanate, and Z-Sorb. The latter sorbent is a commercial product consisting of ZnO, a promoter, and a proprietary supporting matrix designed to provide stability and prolong sorbent life. Although these Zn-based sorbents have been the subject of extensive pilot-scale and process development work, all sorbents produced to date still experience structural and reactive degradation over multi-cycle use at relatively moderate temperatures. An effective alternative to zinc-based sorbents could be manganese sorbents which withstand high temperature operation and also maintain structural and reactive integrity over many cycles, as investigations by Ben-Slimane and Hepworth have indicated. Thermodynamic limits may prevent MnO from achieving the low sulfur specifications of the product gas for use in a molten carbonate fuel cell, but under the correct conditions the guideline for IGCC systems can easily be achieved. Furthermore, manganese sorbents could possibly be used in conjunction with a polishing sorbent (such as zinc oxide) possessing more favorable thermodynamic properties to reach levels acceptable for fuel cell applications (
Book Synopsis Kinetics of Mn-based Sorbents for Hot Coal Gas Desulfurization. Quarterly Progress Report, September 15, 1995--December 15, 1995 by :
Download or read book Kinetics of Mn-based Sorbents for Hot Coal Gas Desulfurization. Quarterly Progress Report, September 15, 1995--December 15, 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 Morgantown Energy Technology Center (METC) of the U.S. Department of Energy (DOE) is actively pursuing the development of reliable and cost-effective processes to clean coal gasifier gases for application to integrated gasification combined cycle (IGCC) and molten carbonate fuel cell (MCFC) power plants. A large portion of gas cleanup research has been directed towards hot gas desulfurization using Zn-based sorbents. However, zinc titanate sorbents undergo reduction to the metal at temperatures approaching 700°C and lose reactivity because of volatilization. In addition, sulfate formation during regeneration leads to spalling of reactive surfaces. Because of these problems with zinc-based sorbents, METC has shown interest in formulating and testing manganese-based sorbents. Currently, many proposed IGCC processes include a water quench prior to desulfurization. This quench is required for two reasons; limitations in the process hardware (1000°C), and excessive Zn-based sorbent loss (about 700°C). With manganese, the water quench is not necessary to avoid sorbent loss, since Mn-based sorbents have been shown to retain reactivity under cyclic testing at 900°C. This advantage of manganese over zinc has potential to increase thermal efficiency as the trade-off of increasing the equilibrium H2S over-pressure obtainable with a manganese sorbent. In the work which is reported here, lower loading temperatures (as low as 400°C) are studied. Also formulations containing titania rather then alumina are studied to attempt to improve performance.
