Determination of hydrogen loading in the carrier system diphenylmethane/dicyclohexylmethane by depolarized Raman spectroscopy

Jander JH, Kerscher M, Li S, Rausch MH, Wasserscheid P, Fröba AP (2022)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2022

Journal

International Journal of Hydrogen Energy Elsevier

Book Volume: 47

Pages Range: 9331-9345

Journal Issue: 15

DOI: 10.1016/j.ijhydene.2022.01.005

Abstract

During the processes of hydrogenation or dehydrogenation of liquid organic hydrogen carriers (LOHCs), knowledge of the current degree of hydrogenation (DoH) is often essential. The present study shows that depolarized Raman spectroscopy allows the accurate determination of the DoH of the model LOHC system diphenylmethane (H0-DPM)/dicyclohexylmethane (H12-DPM) at temperatures up to 573 K. Using two independent experimental setups and binary mixtures of H0- and H12-DPM, a temperature-independent calibration factor could be obtained by analyzing Raman bands characteristic for the aromatic and aliphatic carbon rings. The successful transfer of the calibration to technical mixtures is validated by DoH measurements of samples from deliberately stopped hydrogenation reactions containing also the intermediate cyclohexylphenylmethane (H6-DPM) and of pure H6-DPM. Here, the average absolute deviation of the DoHs obtained by depolarized Raman spectroscopy from those measured analytically is 0.018, which demonstrates the applicability of the method at arbitrary and process-relevant temperatures.

Authors with CRIS profile

Julius Jander Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Manuel Kerscher Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Shao Li Lehrstuhl für Chemische Reaktionstechnik (CRT) Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik (CRT) Andreas Paul Fröba Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies (SAOT)

Related research project(s)

Thermophysical properties of the LOHC system for conditions related to high-performance release of hydrogen Emissionsfreier und stark emissionsreduzierter Bahnverkehr auf nicht-elektrifizierten Strecken Jan. 1, 2019 - Dec. 31, 2023

How to cite

APA:

Jander, J.H., Kerscher, M., Li, S., Rausch, M.H., Wasserscheid, P., & Fröba, A.P. (2022). Determination of hydrogen loading in the carrier system diphenylmethane/dicyclohexylmethane by depolarized Raman spectroscopy. International Journal of Hydrogen Energy, 47(15), 9331-9345. https://doi.org/10.1016/j.ijhydene.2022.01.005

MLA:

Jander, Julius Hans, et al. "Determination of hydrogen loading in the carrier system diphenylmethane/dicyclohexylmethane by depolarized Raman spectroscopy." International Journal of Hydrogen Energy 47.15 (2022): 9331-9345.

BibTeX: Download