Desulfurization of Hot Coal-Derived Fuel Gases with Manganese-Based Regenerable Sorbents. 1. Loading (Sulfidation) Tests

Ben-Slimane, R.; Hepworth, M.T.

doi:10.1021/ef00048a003

Cited by 68 publications

(60 citation statements)

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“…Similarly, Slimane and Hepworth [14,15] also found that manganese-based sorbents presented high initial sorption rate, high sulfur capacity and good regenerative ability during hot coal gas desulfurization at 700-1000 • C but with high H 2 S equilibrium concentration (around 150 ppmv). Therefore, a variety of oxides, such as zinc oxide [16][17][18][19], iron oxides [18,[20][21][22], copper oxides [19,21,23,24], and vanadium oxides [25,26] were incorporated into manganese oxides in order to increase the H 2 S removal efficiency.…”

Section: Introductionmentioning

confidence: 91%

Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas

Zhang

Liu

Zhang

et al. 2012

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 91%

Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas

Zhang

Liu

Zhang

et al. 2012

Journal of Hazardous Materials

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“…46 Solid− gas diffusion is controlled by temperature to a large extent and is the dominant factor of the desulfurization process at 700− 850°C. 6 The 55%Sm 5 Mn 95 /MSU-S sorbent exhibited the …”

Section: Sem and Hrtem Images Of Msu-s And Sorbents As Shown Inmentioning

confidence: 97%

High-Temperature Desulfurization of Coal Gas over Sm Doped Mn-based/MSU-S Sorbents

Wang

Liu

Zhang

et al. 2015

Ind. Eng. Chem. Res.

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Hexagonally ordered mesoporous MSU-S was assembled from nanoclustered zeolite seeds. The XRD and BET results verified that after treated in 10%H 2 O/N 2 atmosphere at 800°C for 2 h, MSU-S still remained a well-ordered hexagonal structure due to rich acidic sites and excellent hydrothermal stability. A series of Sm x Mn y O z /MSU-S sorbents were prepared by a sol−gel method. The desulfurization performances of the 55%Sm 5 Mn 95 /MSU-S sorbent were improved significantly due to high hydrothermal stability of MSU-S with high surface area as well as the synergistic effect between Mn and Sm 2 O 3 . The result of eight successive sulfurization/regeneration cycles of sorbent illustrated that high breakthrough sulfur capacity and endurable stability of 55%Sm 5 Mn 95 /MSU-S correlated closely with the existence of the framework 4-coordination aluminum (NH 3 -TPD, 27 Al MAS NMR) and high dispersion of Sm/Mn species on MSU-S (XRD, TPR) for H 2 S removal. HRTEM images and SAED patterns confirmed that fresh 55%Sm 5 Mn 95 /MSU-S existed in high ordered mesoporous structure and the nanosized Sm 2 O 3 and Mn 3 O 4 particles occurred in highly dispersive polycrystallites. The valence state of Mn species and the regeneration process of used sorbent were characterized by X-ray photoelectron spectroscopy (XPS) and TG/DSC. In addition, the effects of reaction temperature, feed composition and Sm/Mn atomic ratio in sorbents on desulfurization performance were investigated.

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“…Because gasification gas composition can vary over a wide range depending on fuel type and gasification operating conditions, three simulated gases based on gas compositions obtained from typical gasifiers [Texaco oxygen blown entrained flow gasifier, Shell oxygen blown entrained flow gasifier and TU Delft oxygen‐steam blown circulating fluidized bed gasifier (CFBG)] with different oxidizers were used for the thermodynamic analysis of sorption with various sorbents for H 2 S removal. The gas composition of Texaco and Shell are cited from Hepworth et al in the references [14, 15]. To find the product composition for a multicomponent reacting system for the specified conditions, stoichiometric and nonstoichiometric methods are broadly used.…”

Section: Desulfurization and Regeneration Simulationmentioning

confidence: 99%

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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Desulfurization of Hot Coal-Derived Fuel Gases with Manganese-Based Regenerable Sorbents. 1. Loading (Sulfidation) Tests

Cited by 68 publications

References 0 publications

Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas

Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas

High-Temperature Desulfurization of Coal Gas over Sm Doped Mn-based/MSU-S Sorbents

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

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