Chemical changes occurring during sulphidation and regeneration of iron-containing sorbents

Fuda, Kiyoshi; Palmer, Allan D.; Sears, P L; Blais, Diane; Furimsky, Edward

doi:10.1016/0016-2361(91)90102-g

Cited by 19 publications

(11 citation statements)

References 5 publications

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“…Figure 6 also indicates that the partial pressure of O 2 had less effect than temperature on the regeneration process. At the regeneration temperature of 900 and 1200°C, Fe 2 O 3 was be the main species in the regenerated sorbents, which is also reported by Fuda et al [31]. By using the regeneration gas with 5 vol % O 2 at the temperature of 1500°C, Fe 3 O 4 was being the main regenerated product, whereas at 600°C, some Fe 2 (SO 4 ) 3 would be produced, which should be avoided in the operation.…”

Section: Resultssupporting

confidence: 63%

Echogenicity of liver metastases from colorectal carcinoma is an independent prognostic factor in patients treated with regional chemotherapy

Gruenberger

Zhao

King

et al. 2002

Cancer

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BACKGROUNDEchogenicity of liver metastases was found to be a predictive biologic factor influencing long‐term outcome after curative liver resection. The current analysis focuses on the influence of echogenicity on survival in patients treated with intraarterial chemotherapy for unresectable colorectal carcinoma liver metastases.METHODSA retrospective analysis of prospectively collected data at the Department of Surgery at the University of New South Wales‐affiliated St. George Hospital was performed. Two hundred twelve consecutive patients with unresectable hepatic metastases from colorectal carcinoma treated between May 1992 and September 2000 were analyzed. Echogenicity of metastases was measured intraoperatively using a 5 MHz probe. Overall survival difference was compared between hyper‐ and hypoechoic metastases on an intention‐to‐treat basis.RESULTSAt a median followup of 15.1 months, 47 patients (22%) were alive and 165 (78%) had died. A significant survival benefit was observed in patients having hyperechoic lesions (median survival 16.2 months, 95% confidence interval [CI] 13.9–18.5) compared to hypoechoic lesions (median survival 11.6 months, 95% CI 8–15.2), P < 0.01. Other prognostic factors were differentiation of the primary tumor (P < 0.02), percentage hepatic replacement (P < 0.05) and carcinoembryonic antigen decrease (P < 0.03). Echogenicity was identified as an independent prognostic factor in multivariate analysis (P < 0.009).CONCLUSIONSEchogenicity is an important prognostic survival parameter. Cancer 2002;94:1753–9. © 2002 American Cancer Society.DOI 10.1002/cncr.10386

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Section: Resultssupporting

confidence: 63%

Echogenicity of liver metastases from colorectal carcinoma is an independent prognostic factor in patients treated with regional chemotherapy

Gruenberger

Zhao

King

et al. 2002

Cancer

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“…Iron (III) oxide, a-Fe 2 O 3 , has been reported to effectively remove sulfide species from gaseous streams [8,[10][11][12] and aqueous solution [28]. Commercially available a-Fe 2 O 3 nanoparticles ranging from 20 to 50 nm in size were dispersed in the background microemulsion and placed in the reactor vessel at 60 rpm stirring.…”

Section: A-fe 2 O 3 Nanoparticle Sorbentsmentioning

confidence: 99%

“…Iron (III) oxide displayed higher sulfur uptake/ g of sorbent than calcium and zinc oxides over a temperature range between 600 and 800°C [9]. In addition, iron (III) oxide showed high sorption capacity at moderate temperatures between 350 and 550°C [8,10,11]. Effective absorption of H 2 S (g) at temperatures between 25 and 100°C and pressures between 1 and 20 atm could also be achieved by iron (III) oxide granules [12,13].…”

Section: Introductionmentioning

confidence: 98%

Scavenging H2S(g) from oil phases by means of ultradispersed sorbents

Husein

Patruyo

Pereira‐Almao

et al. 2010

Journal of Colloid and Interface Science

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“…Reported works in the literature of Kawasaki Heavy Industries (KHI), 44 Sasaoka et al, 45 Hasatani et al, 46 and Fuda et al 47 in Japan; Van der Wal 48 and De Wild et al 49 in the Netherlands; and Patrick et al 50 in the United States offer clear indications that a sorbent based on iron oxide may be suitable for desulfurization applications at moderate temperatures.…”

Section: Thermodynamic and Practical Considerations Desulfurization (mentioning

confidence: 99%

Advanced Sorbent Development Program Development of Sorbents for Moving-Bed and Fluidized-Bed Applications

Ayala¹,

Venkataramani²

2000

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The integrated gasification combined cycle (IGCC) power system using high-temperature coal gas cleanup is one of the most promising advanced technologies for the production of electric power from coal in an environmentally acceptable manner. Unlike conventional low-temperature cleanup systems that require costly heat exchangers, high-temperature coal gas cleanup systems can be operated near 482-538 °C (900-1000 °F) or higher, conditions that are a closer match with the gasifier and turbine components in the IGCC system, thus resulting is a more efficient overall system. GE is developing a moving-bed, high-temperature desulfurization system for the IGCC power cycle in which zinc-based regenerable sorbents are currently being used as desulfurization sorbents. Zinc titanate and other proprietary zinc-based oxides are being considered as sorbents for use in the Clean Coal Technology Demonstration Program at Tampa Electric Co.'s (TECo) Polk Power Station. Under cold startup conditions at TECo, desulfurization and regeneration may be carried out at temperatures as low as 343 °C (650 °F), hence a versatile sorbent is desirable to perform over this wide temperature range. A key to success in the development of high-temperature desulfurization systems is the matching of sorbent properties for the selected process operating conditions, namely, sustainable desulfurization kinetics, high sulfur capacity, and mechanical durability over multiple cycles. Additionally, the sulfur species produced during regeneration of the sorbent must be in a form compatible with sulfur recovery systems, such as sulfuric acid or elemental sulfur processes. The overall objective of this program is to develop regenerable sorbents for hydrogen sulfide removal from coal-derived fuel gases in the temperature range 343-538 °C (650-1000 °F). Two categories of reactor configurations are being considered: moving-bed reactors and fluidized-bed (bubbling and circulating) reactors. In addition, a cost assessment and a market plan for large-scale fabrication of sorbents were developed. As an optional task, long-term bench-scale tests of the best moving-bed sorbents were conducted. Starting from thermodynamic calculations, several metal oxides were identified for potential use as hot gas cleanup sorbents using constructed phase stability diagrams and laboratory screening of various mixed-metal oxide formulations. Modified zinc titanates and other proprietary metal oxide formulations were evaluated at the bench scale and many of them found to be acceptable for operation in the target desulfurization temperature range of 370 °C (700 °F) to 538 °C (1000 °F) and regeneration temperatures up to 760 °C (1400 °F). Further work is still needed to reduce the batch-to-batch repeatability in the fabrication of modified zinc titanates for larger scale applications. The information presented in this Volume 1 report contains the results of moving-bed sorbent development at General Electric's Corporate Research and Development (GE-CRD). A separate Volume 2 report contains ...

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Chemical changes occurring during sulphidation and regeneration of iron-containing sorbents

Cited by 19 publications

References 5 publications

Echogenicity of liver metastases from colorectal carcinoma is an independent prognostic factor in patients treated with regional chemotherapy

Echogenicity of liver metastases from colorectal carcinoma is an independent prognostic factor in patients treated with regional chemotherapy

Scavenging H2S(g) from oil phases by means of ultradispersed sorbents

Advanced Sorbent Development Program Development of Sorbents for Moving-Bed and Fluidized-Bed Applications

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