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NH 3 Competitive Adsorbed FTIR: A Potential Method to Investigate the Confined Species‐Acidic Sites Interaction in SAPO‐34 Catalyst
Author(s) -
Hu Bing,
Wang Dakang,
Gao Simeng,
Zhang Xiangwen,
Mao Guoliang,
Wang Baohui,
Luo Mingjian
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601142
Subject(s) - absorbance , phenanthrene , chemistry , catalysis , fourier transform infrared spectroscopy , adsorption , pyrene , molar absorptivity , inorganic chemistry , organic chemistry , chemical engineering , chromatography , physics , optics , engineering
Abstract NH 3 competitive adsorbed FTIR method is proposed for investigating the interaction between confined species and acidic sites. Results indicate aromatic cations formed in SAPO‐34 cages. The cations have much higher extinction coefficient than the corresponding aromatics. They cause the new absorbance bands between 1300 and 1700 cm −1 . The absorbance bands at 1615 and 1607 cm −1 are related to the vibration of strengthened C=C bonds of aromatic cations. The area of these two bands can be used to quantify the amount of confined species. The band at 1650 cm −1 is a sign of the formation of phenanthrene derivatives and pyrene.