TIN-PROMOTED Pd/MWNTs CATALYSTS in ACETYLENE HYDROGENATION REACTION

摘要

Introduction Small amounts of acetylene presented in ethylene resulted from thermal cracking of oil compounds are known as an undesired impurity in the ethylene-based polymerization reactions [1]. As a well-known issue, Pd-based catalysts are recognized to selectively hydrogenate acetylene to ethylene [2]. To decrease ethane production and formation of oligomers (green oil) over Pd sites during acetylene hydrogenation, some promoters are preferred. Tin promoter is usually used in dehydrogenation reactions; however, there are some reports on its application in hydrogenation reaction as well [3-4].