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The deactivation of a Pd/SiO 2 catalyst by H 2 S during the hydrogenation of 1,3-butadiene and its subsequent reactivation have been studied. The poisoning effect of H 2 S on Pd catalysts during C 4 H 6 hydrogenation strongly decreased when the temperature of reaction was increased from 373 K to 508 K, due to the competition of butadiene for H 2 S chemisorption...
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