Abstract
The aluminum rich mordenite (Si/Al wt% ~7) sample has been treated with various acids i.e., hydrochloric acid (MOR-HC), nitric acid (MOR-HN) and oxalic acid (MOR-Ox) so as to facilitate the dealumination and mesopore creation in the mordenite. The parent as well as acid treated samples have been characterized by XRD, FTIR, SEM, TEM, BET, N2 adsorption–desorption, porosity and NH3–TPD. The resultant samples have been applied for their catalytic activity towards selective oxidation of benzyl alcohol to produce benzaldehyde at solvent-free liquid phase reaction, using H2O2 as oxygen source. Irrespective to the nature of acid, all the dealuminated samples exhibited increase in surface area, external surface area, pore volume and mesopore volume, while the highest increase appeared in case of MOR-HN. This phenomenon also reflected in the selective oxidation activity of the samples, where all the acid treated samples exhibited improvement in the benzyl alcohol conversion and benzaldehyde yield. The highest conversion of >99 % along with as high as >100 % selectivity to benzaldehyde was obtained on MOR-HN catalyst. This particular catalyst also exhibited excellent reusability suitable for its industrial applications.
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Authors are thankful to the Director- IIP, for his encouragement. We are thankful to XRD, IR and SEM, groups at IIP for analysis.
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Saxena, S.K., Viswanadham, N. & Al-Muhtaseb, A.H. Enhanced selective oxidation of benzyl alcohol to benzaldehyde on mesopore created mordenite catalyst. J Porous Mater 23, 1671–1678 (2016). https://doi.org/10.1007/s10934-016-0228-6
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DOI: https://doi.org/10.1007/s10934-016-0228-6