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Effect of N 2 pretreatment on the basicity, structural change, and isomerization activity of MgO and MgO/Mg(OH) 2 catalysts
Author(s) -
Suttibut Prinyanee,
Suriye Kongkiat,
Kunjara Na Ayudhya Sirachaya,
Praserthdam Piyasan,
Panpranot Joongjai
Publication year - 2015
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.1869
Subject(s) - isomerization , catalysis , chemistry , fourier transform infrared spectroscopy , titration , phase (matter) , sintering , infrared spectroscopy , inorganic chemistry , nuclear chemistry , organic chemistry , chemical engineering , engineering
As revealed by the X‐ray diffraction, basicity titration, and Fourier transform infrared spectroscopy results, changes in the structural properties, basicity, and isomerization activities were observed on the MgO catalysts upon N 2 pretreatment at 325 °C followed by isomerization reaction at 125 °C. These changes became less pronounced when the starting catalysts contained Mg(OH) 2 phase or when the catalysts were pretreated under N 2 at high temperature alone (without reaction). Because of the limited amount of O 2 during 1‐butene isomerization, the single‐phase MgO could transform into the mixed MgO/Mg(OH) 2 catalysts, and the basicity and the isomerization activity were enhanced. Higher temperature pretreatment (i.e. 527 °C), however, led to the changes of Mg(OH) 2 back to the single MgO phase and/or sintering of MgO. © 2015 Curtin University of Technology and John Wiley & Sons, Ltd.