One pot menthol synthesis via hydrogenations of citral and citronellal over montmorillonite-supported Pd/Ni-heteropoly acid bifunctional catalysts
Shah AK, Maitlo G, Shah AA, Channa IA, Kandhro GA, Maitlo HA, Bhatti UH, Shah A, Memon AQ, Jatoi AS, Park YH (2019)
Publication Type: Journal article
Publication year: 2019
Journal
DOI: 10.1007/s11144-019-01679-6
Abstract
Menthol synthesis is possible through citral and citronellal hydrogenations via following multistage chemical reactions such as hydrogenation and cyclization. This research mainly focuses on a design of selective, active and cost-effective metal-acid (bifunctional) catalysts for menthol production via citral and citronellal hydrogenations. More specifically, Pd and Ni metals were impregnated over acidic support (e.g., hetero-poly acid supported montmorillonite, HPA_MM). The prepared catalysts were characterized by BET, pyridine adsorption and amine titration methods. Some of the most important parameters such as metal type and loading; applied pressure and reaction time have been investigated throughout this work. The obtained results reveals that the 8 wt% Ni-HPA-MM catalyst (Cat-5) has produced 63% menthols (initial reaction rate 0.126mmol/min) from citral hydrogenation (80 degrees C, 1.0MPa) within 24h. Similarly, during lower applied pressure (0.5MPa), the production of menthol was significantly improved (approximately 98% of menthol, initial reaction rate similar to 0.138mmol/min) with the application of 8 wt% Ni-HPA-MM catalyst (Cat-5) in citronellal hydrogenation. Higher menthol selectivity was achieved from both reactions (citral and citronellal hydrogenation) which might be due to the presence of strong Lewis and medium BrOnsted acid sites.
Authors with CRIS profile
Involved external institutions
Hanyang University / 한양대학교
Korea, Republic of (KR)
NED University of Engineering and Technology / انجنيئرڱ ۽ ٽيڪنالاجي جي جامعہ اين اي ڊي
Pakistan (PK)
Dawood University of Engineering & Technology Karachi (DUET)
Pakistan (PK)
University of Sindh
Pakistan (PK)
Korea Institute of Energy Research
Korea, Republic of (KR)
Korea, Republic of (KR)
NED University of Engineering and Technology / انجنيئرڱ ۽ ٽيڪنالاجي جي جامعہ اين اي ڊي
Pakistan (PK)
Dawood University of Engineering & Technology Karachi (DUET)
Pakistan (PK)
University of Sindh
Pakistan (PK)
Korea Institute of Energy Research
Korea, Republic of (KR)
How to cite
APA:
Shah, A.K., Maitlo, G., Shah, A.A., Channa, I.A., Kandhro, G.A., Maitlo, H.A.,... Park, Y.H. (2019). One pot menthol synthesis via hydrogenations of citral and citronellal over montmorillonite-supported Pd/Ni-heteropoly acid bifunctional catalysts. Reaction Kinetics Mechanisms and Catalysis. https://dx.doi.org/10.1007/s11144-019-01679-6
MLA:
Shah, Abdul Karim, et al. "One pot menthol synthesis via hydrogenations of citral and citronellal over montmorillonite-supported Pd/Ni-heteropoly acid bifunctional catalysts." Reaction Kinetics Mechanisms and Catalysis (2019).
BibTeX: Download