Thermodynamic efficiencies of hydrogen storage processes using carbazole-based compounds

In Young Choi, Byeong Soo Shin, Sang Kyu Kwak, Kyung Soo Kang, Chang Won Yoon, Jeong Won Kang

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Carbazole-based compounds are promising candidates for hydrogen storage materials, and recent research has focused on finding components with higher hydrogen storage capacity and desirable physical properties. In this paper, thermodynamic efficiencies of hydrogenation and dehydrogenation reactions were analyzed assuming an idealized process. The physical properties and thermodynamic efficiencies of three carbazole-based compounds (n-ethylcarbazole, n-propylcarbazole, n-acetylcarbazole) were investigated for use as liquid organic hydrogen carriers (LOHCs). Unavailable physical and thermodynamic properties were estimated using molecular modeling or group-contribution methods. Process simulations were performed for hydrogen storage and release processes using a commercial simulation package to evaluate the thermodynamic efficiencies of three candidate molecules. Even though there might be additional loss of exergy upon practical implementation of the whole process, the framework developed in this study can be useful for screening candidate LOHC molecules.

Original languageEnglish
Pages (from-to)9367-9373
Number of pages7
JournalInternational Journal of Hydrogen Energy
Issue number22
Publication statusPublished - 2016 Jun 15

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014R1A5A1009799 ). This work was also supported by the Technology Innovation Program ( 10045068 , Development of flow assurance and an organic acid/calcium removal process for the production of offshore opportunity crude) funded by the Ministry of Trade, Industry & Energy (MI, Korea) .

Funding Information:
This work was also supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20153030041030 ).

Publisher Copyright:
© 2016 Hydrogen Energy Publications LLC.


  • Carbazole
  • Hydrogen storage
  • Liquid organic hydrogen carrier (LOHC)

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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