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Inert Can Be Advantageous: Advisable Reconstruction and Application of Palladium Chloride for the Preferential Oxidation of the Hydrogen Impurity in Carbon Monoxide Streams
Author(s) -
Qiao Luyang,
Li Qiaohong,
Zhou Zhangfeng,
Si Rui,
Yao Yuangen
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201600301
Subject(s) - catalysis , selectivity , palladium , carbon monoxide , chemistry , inorganic chemistry , ethylene glycol , adsorption , hydrogen , ethylene , hydrogen chloride , chloride , organic chemistry
Preferential oxidation of the H 2 impurity in CO streams is crucial for the catalytic conversion of CO into ethylene glycol. It is uncertain as to whether H 2 can overthrow the dominance of CO and finally lead the reaction. Not only is this a typical research issue, but it is also extremely critical for practical applications. So far, no catalyst has shown selectivity higher than 50 % owing to competitive adsorption of CO. In this work, we report a PdCl x ‐based catalyst that can readily overcome the challenge mentioned above. Over this catalyst, the selectivity of H 2 oxidation is promoted by more than 40 % relative to that over the conventional Pd/Al 2 O 3 catalyst and reaches a value of 87 %. The turnover frequency of undesired CO oxidation is inhibited by at least one order of magnitude. We found that the reconstructed palladium chloride was highly selective to this reaction by facile inhibition of the adsorption and oxidation of CO.