Linked Life Data

19350929

Source:http://linkedlifedata.com/resource/pubmed/id/19350929

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2009-4-8
pubmed:abstractText
Novel reactive nanosized V2O5/TiO2 catalysts (aerogel, xerogel, and impregnated catalysts) for the removal of Hg(O) and their synthesis methods have been introduced in this research. Aerogel catalyst has the highest surface area among the catalysts synthesized in this research and contained reactive monovanadates on its surfaces resulting in higher reactivity for the Hg(O) removal than impregnated and selective catalytic reduction catalysts. XPS analyses on the surfaces of nanosized catalysts after the removal of Hg(O) suggest that adsorbed Hg(O) oxidatively transformed to HgO by surface vanadates (mono- and poly vanadates), consistent with the Mars-Maessen mechanism. Early column breakthrough has been observed at temperatures above 300 degrees C due mainly to the desorption of Hg(O) from the catalyst surfaces. The decrease in Hg(O) concentration and increase in catalyst content in a column reactor have increased the removal of Hg(O), indicating that the removal is a heterogeneous surface-limited reaction. At 400 degrees C, the catalysts under air flow have shown a higher Hg(O) removal because gas-phase oxygen from the flow could provide an oxygen-rich environment for producing more oxidized vanadate species on their surfaces. No significant difference in the Hg(O) removal between different gas types (nitrogen and air) has been observed at 100 degrees C.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0013-936X
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
43
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1522-7
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Removal of elemental mercury (Hg(0)) by nanosized V2O5/TiO2 catalysts.
pubmed:affiliation
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea. woojin_lee@kaist.edu
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't