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Active sites for catalytic reduction of SO2 with CO on alumina.

Authors
Khalafalla-SE; Haas-LA
Source
J Catal 1972 Jan; 24(1):115-120
NIOSHTIC No.
10010331
Abstract
The hydroxyl groups associated with the Brönsted acid sites in alumina are more influential in adsorbing sulfur dioxide than the more common Lewis acid sites. Hence alumina in various slightly hydrated, acid-soluble forms, such as boehmite or ?-alumina, are far more efficient than the high-temperature corundum or a-alumina. Catalyst pretreatment with HF diminished its activity because the incorporation of halogens in the alumina lattice enhanced its Lewis acidity and blocked the OH- groups in the Brönsted sites. In the temperature range 450-600 °C, the catalytic activity of alumina was practically unaffected by pretreatment with an organic base, such as quinoline, which normally blocks the Lewis acid sites. Elemental sulfur activates the alumina surface during the catalyst break-in period.
CODEN
JCTLA5
Publication Date
19720101
Document Type
OP; Journal Article
Fiscal Year
1972
NTIS Accession No.
NTIS Price
Identifying No.
OP 42-72
Issue of Publication
1
ISSN
0021-9517
NIOSH Division
TCRC
Source Name
Journal of Catalysis
State
MN
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