fulltext.study @t Gmail

The effect of the N atom on the dehydrogenation of heterocycles used for hydrogen storage

Paper ID Volume ID Publish Year Pages File Format Full-Text
41028 45875 2012 6 PDF Available
Title
The effect of the N atom on the dehydrogenation of heterocycles used for hydrogen storage
Abstract

The effect of the N atom on the hydrogen release rate from heterocyclic compounds was studied by comparing the dehydrogenation rate of dodecahydro-N-ethylcarbazole, dodecahydrocarbazole and dodecahydrofluorene. Over a 5 wt% Pd/C catalyst, hydrogen recovery was fastest (TOF ∼60 min−1 at 443 K and 101 kPa) from dodecahydro-N-ethylcarbazole and ∼3 times faster than that of dodecahydrocarbazole. Dodecahydrofluorene dehydrogenation was the slowest among the compounds examined, with less than 1 wt% H2 recovered after more than 20 h at 443 K, although selectivity to the completely dehydrogenated product was 95%. Despite catalyst poisoning by the N in dodecahydrocarbazole and its dehydrogenated product, the presence of the N in the heterocycle increased the dehydrogenation reaction rate compared to dodecahydrofluorene, demonstrating that heterocycles are better candidates for H2 storage than polycycles.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (84 K)Download as PowerPoint slideHighlights► H2 recovery rates from heterocycles is reported on a Pd/C catalyst. ► H2 recovery from dodecahydro-N-ethylcarbazole is faster than from dodecahydrocarbazole. ► H2 recovery from dodecahydrocarbazole is faster than from dodecahydrofluorene. ► The presence of the N atom in the heterocycle increases the dehydrogenation rate.

Keywords
Dehydrogenation; Kinetics; Catalyst; Dodecahydro-N-ethylcarbazole; Hydrogen storage
First Page Preview
The effect of the N atom on the dehydrogenation of heterocycles used for hydrogen storage
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 419–420, 29 March 2012, Pages 67–72
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us