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Adsorptive Removal of Residual Sulfur Compounds in Commercial Fuel Oil by Means of Biomass-Derived Activated Carbons (pp.421-432) $100.00
Authors:  (Seiji Kumagai, Department of Machine Intelligence and Systems Engineering, Akita Prefectural unversity, Yurihonjo, Akita, Japan)
Abstract:
Micro- and mesoporous granular rice husk activated carbon (RHAC) and
microporous granular coconut shell activated carbon (CSAC) were evaluated as
adsorptive desulfurization agents to remove residual sulfur in forms of benzothiophenes
(BTs) and dibenzothiophenes (DBTs) in commercial kerosene. Fixed-bed flow
desufurization tests were conducted, providing the breakthrough curves for BTs and
DBTs. The adsorption isotherms for BTs and DBTs were also obtained in a batch-mode,
correlating with the results of the fixed-bed flow test. RHAC and CSAC are found to be
useful to remove BTs and DBTs. RHAC showed a lower selectivity for DBTs and a
higher selectivity for BTs than CSAC did. A larger adsorption capacity of DBTs in
volume basis was observed on CSAC, which was attributed to its higher bed density,
higher carbon content and larger volume of ultramicropores. Although RHAC had lower
carbon content and smaller volume of ultramicropores, it showed a larger adsorption
capacity of BTs and acceptable adsorption capacity of DBTs in volume basis. This was
explained by a larger volume of mesopores contributing to efficient transportation of BTs
and DBTs towards their adsorption sites of ultramicropores. 


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Adsorptive Removal of Residual Sulfur Compounds in Commercial Fuel Oil by Means of Biomass-Derived Activated Carbons (pp.421-432)