“Science keeps down the weed of superstition not by logic, but by rendering the mental soil unfit for its cultivation” -- John Tyndall, prominent 19th century physicist (2 August 1820 – 4 December 1893)
Key word cultivation can be nearly as useful as the actual content of peer reviewed articles. Keep a list of key words that you find during your online research. Here, for example are three articles that appeared as the result of Googling® the following search string …
“sulfur breakthrough” 2010
Applied Catalysis B: Environmental
Article in Press, Accepted Manuscript - Note to users
Selective Adsorption of Dibenzothiophene by Functionalized Metal Organic Framework Sorbents
Fan Shi1, a, Maha Hammoud2, a and Levi T. Thompson, a,
a University of Michigan, Department of Chemical Engineering, Ann Arbor, MI 48109, USA
ltt@umich.edu
Received 9 January 2010; revised 23 June 2010; accepted 15 July 2010. Available online 22 July 2010.
Abstract
The adsorption of organosulfur compounds directly from liquid fuels has potential advantages over hydrodesulfurization processes including higher efficiencies and lower costs. A series of sorbents was prepared by decomposing Mo(CO)6 onto MOF-5, and evaluated for the selective adsorption of dibenzothiophene from solutions containing i-octane, naphthalene and/or benzene. The resulting materials had Mo loadings up to 20 wt%, surface areas in excess of 1800 m2/g and pore size distributions that were very similar to those for the parent MOF-5. Other than features for MOF-5, there was no evidence of crystalline domains larger than 50 nm in the x-ray diffraction patterns, although, Mo(CO)6 typically decomposes into Mo carbide and/or oxycarbide species under the conditions employed. These materials possessed strong affinities for the adsorption of dibenzothiophene in the absence and presence of the types of aromatic compounds typically found in transportation fuels. Sulfur uptakes at breakthrough approached 0.5 mmolS/g which corresponded to surface coverages of 4%. With further development, these materials could be used to remove sulfur from gasoline, diesel and military logistics fuels.
Keywords: adsorptive desulfurization; Mo carbide functionalized MOF-5; dibenzothiophene
Corresponding author.
1 NETL, 626 Cochrans Mill Road, Pittsburgh, PA 15236.
2 A123 Systems, 3850 Research Park Drive, Ann Arbor, MI 48108.
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Fuel
Volume 89, Issue 11, November 2010, Pages 3218-3225
Supported silver adsorbents for selective removal of sulfur species from hydrocarbon fuels
Sachin Naira and Bruce J. Tatarchuk, a,
a Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
tatarbj@auburn.edu
Received 9 February 2010; revised 23 April 2010; accepted 9 May 2010. Available online 20 May 2010.
Abstract
Dispersed silver oxides on supports such as TiO2, γ-Al2O3 and SiO2 were observed to be effective desulfurizing agents for refined fuels at ambient conditions. TiO2 was determined to be the most stable support for silver oxide. Ag (4 wt%)/TiO2 demonstrated a saturation sulfur capacity of 6.3 mgS/g for JP5 fuel containing 1172 ppmw sulfur. This high affinity for sulfur translated to one sulfur heterocycle associated with every two surface Ag atoms in the sorbent even in the presence of a 160-fold excess of other aromatics found in the fuel. A unique attribute of these sorbents was that they were thermally regenerable at 450 °C using air as a stripping medium over multiple cycles. Desulfurization characteristics also varied with fuel composition. Variation in desulfurization performance between JP5, JP8 and a light fraction JP5 were established and associated with the differences in sulfur composition of these fuels. The effects of surface area, porosity and crystal structure of the sorbent on sulfur capacity are also presented.
Keywords: Desulfurization; Sulfur sorbent; Oxygen chemisorption; Refined fuels
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Microporous and Mesoporous Materials
Volume 127, Issue 3, February 2010, Pages 190-197
Low temperature H2S dry-desulfurization with zinc oxide
Hector F. Garcesa, 1, , Hugo M. Galindob, Luis J. Garcesc, Jennifer Huntd, 2, , Aimee Moreyb and Steven L. Suiba, b, ,
aUniversity of Connecticut, Institute of Materials Science, 97 North Eagleville Rd., Storrs, CT 06269-3136, United States
bUniversity of Connecticut, Department of Chemistry, 55 North Eagleville Rd., Unit 3060, Storrs, CT 06269-3060, United States
cInstituto de Química, Universidad de Antioquia, Apartado Aéreo 1226, Medellín, Colombia
dFuel Cell Energy, Inc., United States
Received 18 May 2009; revised 8 July 2009; accepted 18 July 2009. Available online 5 August 2009.
hector.garces@uconn.edu
jhunt@fce.com
steven@uconn.edu
Abstract
A commercially available zinc oxide with a bimodal micro- and mesopore size distribution was investigated as a desulfurizing sorbent in a fixed-bed reactor at low temperatures from 60 to 400 °C. Fresh and sulfided materials were characterized by X-ray diffraction (XRD), BET specific surface area, pore volume, SEM/EDX, TGA/DSC and in situ X-ray diffraction (XRD). The sorbent’s sorption capacity at breakthrough increased with the sulfidation temperature reaching 87% of the theoretical value for desulfurization at 400 °C. A deactivation model that considers the activity of the solid reactant was used to fit the experimental data. Good agreement between the experimental breakthrough curves and the model predictions was obtained.
Keywords: Zinc oxide adsorbent; H2S; Deactivation model; Sulfur breakthrough; Dry-desulfurization
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Here are the key words identified by the indexers of the above articles …
Keywords: Zinc oxide adsorbent; H2S; Deactivation model; Sulfur breakthrough; Dry-desulfurization
Keywords: Desulfurization; Sulfur sorbent; Oxygen chemisorption; Refined fuels
Keywords: adsorptive desulfurization; Mo carbide functionalized MOF-5; dibenzothiophene
You may find other equally significant key words in the text of each article. List them, save them, and Google® them from time to time. This will help you keep on top of developments that affect your area of research.
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