A experimental study on the dehydrogenation performance of dodecahydro-N-ethylcarbazole on M/TiO2 catalysts. (28th January 2019)

• Record Type: Journal Article
• Authors: Jiang, Zhao; Gong, Xiang; Wang, Bin; Wu, Zhiqiang; Fang, Tao
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 5(2019)
• Page Start: 2951
• Page End: 2959
• Publication Date: 2019-01-28
• Subjects: Dodecahydro-N-ethylcarbazole -- Dehydrogenation -- M/TiO2 -- Activity and selectivity; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.11.236
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Liquid organic hydrogen carrier (LOHC) is considered as a promising candidate for large-scale hydrogen storage. In this work, we found that Pt/TiO2 catalysts exhibited better catalytic activity and selectivity compared to Pd/TiO2 and commercial Pd/Al2 O3 catalysts in the dehydrogenation of dodecahydro-N-ethylcarbazole (12H-NECZ) at 453 K. The catalytic activity of the noble metal catalysts followed the trend of Pt/TiO2 > Pd/TiO2 > Rh/TiO2 > Au/TiO2 > Ru/TiO2 . Compared with the commercial Pd/Al2 O3, Pt/TiO2 greatly improved the selectivity and conversion rate, the reaction time was also shortened. In addition, kinetics calculation was carried out to obtain fundamental reaction parameters. It was found that the third step of 4H-NECZ dehydrogenation to NECZ was the rate-limiting step of the entire dehydrogenation reaction for all catalysts. Highlights: Pt/TiO2 catalysts exhibited better catalytic activity and selectivity. The catalytic activity followed the trend of Pt/TiO2 > Pd/TiO2 > Rh/TiO2 > Au/TiO2 > Ru/TiO2 . 4H-NECZ dehydrogenation to NECZ was the rate-limiting step.