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Adsorption/desorption of dimethylsulfide on activated carbon modified with iron chloride

Paper ID Volume ID Publish Year Pages File Format Full-Text
48119 46494 2009 7 PDF Available
Title
Adsorption/desorption of dimethylsulfide on activated carbon modified with iron chloride
Abstract

The adsorption capacity of activated carbon for the natural gas contaminant dimethylsulfide (DMS) was improved by impregnating it with FeCl3 introduced in solution to affect surface modification. A DMS adsorption mechanism and roles of impregnated FeCl3 on the capacity enhancement were proposed based on experimental tests results.Samples of activated carbon and activated carbon impregnated with FeCl3 were tested as DMS sorbents. Samples loaded with DMS were subsequently extracted with n-octane and the resulting solvents were analyzed for sulfur species using a gas chromatograph equipped with a sulfur chemiluminescence detector. No other sulfur compounds were detected in the liquid samples other than DMS. DMS, dimethyl disulfide, and carbonyl sulfide were recovered from identical DMS-adsorbed samples of activated carbon impregnated with FeCl3 subjected to temperature programmed desorption (TPD) in a nitrogen gas stream. Only DMS was recovered from the activated carbon samples. The TPD patterns indicate different kinetics of DMS desorption related to the carbon phase and the new active sites created by the FeCl3 impregnation. The new active sites improved DMS adsorption capacity and likely had stronger affinity with DMS molecule. As a reference, similar tests were investigated using methyl mercaptan (MM) as an adsorbate on the carbon sorbents. A different adsorption mechanism was found and discussed from these experimental results. Regeneration of the used carbon sorbents by thermal desorption was also explored.

Keywords
Activated carbon; Adsorption; Temperature programmed desorption; Dimethylsulfide; Iron chloride
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Adsorption/desorption of dimethylsulfide on activated carbon modified with iron chloride
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 88, Issues 1–2, 29 April 2009, Pages 25–31
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us