The effect of the modification conditions of natural mordenite on their catalytic characteristics in the selective reduction of NOx |
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| Authors: | V L Struzhko S N Orlik M G Martsenyuk-Kukharuk V P Stasevich V A Ostapyuk T V Mironyuk |
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| Institution: | (1) The Dow Chemical Company, Midland, MI 48640, USA;(2) JMG LLC, 1106 W. Sugnet Rd, Midland, MI 48640, USA;(3) Dow Chemical, Chemistry &; Catalysis R&;D, 1776 bldg, Midland, MI 48674, USA;(4) Dow Benelux N.V., Chemistry &; Catalysis R&;D, P.O. Box 48, 4530 Terneuzen, The Netherlands;(5) Laboratorium voor Oppervlaktechemie, Katholieke Universitat Leuven, Kardinaal Mercierlaan 92, 3030 Leuven, Belgium |
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| Abstract: | The results of a search for optimum conditions for the modification of natural mordenites and the results of an investigation
of their acidic characteristics by temperature programmed desorption of ammonia for the purpose of producing active and sulfur-resistant
catalysts for the selective reduction of NOx by lower hydrocarbons (C1−C4) are presented. It was shown that during the chemical modification of samples of mordenite-bearing rock, including acid treatment
with 0.25–0.5 N sulfuric acid solutions, recationization, and subsequent decationization, the concentration of strong acid
centers increases. Here the activity of the catalysts and the resistance to the effect of SO2 in the selective reduction of NOx to nitrogen by a propane-butane mixture are increased.
L. V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, 31 Prospekt Nauki, Kiev 252039,
Ukraine. Translated from Teoreticheskaya i éksperimental'naya Khimiya, Vol. 35, No. 2, pp. 125–129, March–April, 1999. |
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