Study of catalytic hydrogenation and dehydrogenation of 2, 3-dimethylindole for hydrogen storage application. Issue 26 (27th April 2021)

• Record Type: Journal Article
• Authors: Dong, Yuan; Zhao, Haoming; Zhao, Yinheng; Yang, Ming; Zhang, Heshun; Cheng, Hansong
• Is Part Of: RSC advances. Volume 11:Issue 26(2021)
• Page Start: 15729
• Page End: 15737
• Publication Date: 2021-04-27
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra01552d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The hydrogenation and dehydrogenation of 2, 3-dimethylindole was studied. The released hydrogen was in a high purity, detected by DSMS. Abstract : 2, 3-Dimethylindole (2, 3-DMID), a candidate with a hydrogen storage capacity of 5.23 wt%, was studied as a new liquid organic hydrogen carrier (LOHC) in detail in this report. Hydrogenation of 2, 3-DMID was conducted over 5 wt% Ru/Al2 O3 by investigating the influences of temperature and hydrogen pressure. 100% of fully hydrogenated product, 8H-2, 3-DMID can be achieved at 190 °C and 7 MPa in 4 h. Dehydrogenation of 8H-2, 3-DMID was performed over 5 wt% Pd/Al2 O3 at 180–210 °C and 101 kPa. It is found that dehydrogenation of 8H-2, 3-DMID followed first order kinetics with an apparent activation energy of 39.6 kJ mol −1 . The structures of intermediates produced in the 8H-2, 3-DMID dehydrogenation process were analyzed by DFT calculations.