PD Dr. habil. Monika Johannsen

Eißendorfer Str. 38, Building O, Room 1.012

Telephone +49 40 42878-4260

E-Mail: PD Dr. habil. Monika Johannsen.


Education

  • Chromatographic Separation Processes (Modul "Separation Technologies for Life Science")
  • Advanced Separation Processes (Modul "High Pressure Chemical Engineering")


Publications

[135535]
Title: Partitioning of organic biocides between wood and supercritical carbon dioxide
Written by: Kjellow, A.W., Henriksen, O., Sørensen, J.C., Johannsen, M., Felby, C.
in: The Journal of Supercritical Fluids 2010
Volume: 52 Number:
on pages: 1-5
Chapter:
Editor:
Publisher: ResearchGate
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution: Hamburg University of Technology, Eissendorfer Strasse 38, D-21073 Hamburg, Germany
Type:
DOI: 10.1016/j.sup?u.2009.12.005
URL: https://www.researchgate.net/publication/334050464_Effect_of_Fe-Mo_promoters_on_HZSM-5_zeolite_catalyst_for_1-hexene_aromatization
ARXIVID:
PMID:

[doi] [www] [BibTex]

Note:

Abstract: The promotional effect of Fe-Mo species introduced into HZSM-5 (Zeolyst Int., SiO2/Al2O3 = 30) zeolite catalyst by the wetness impregnation method for the 1-hexene aromatization was investigated. The structure and catalytic performance for the aromatization of 1-hexene over xFeyMo-ZSM-5 catalysts in comparison with unmodified HZSM-5 catalysts were studied. The xFeyMo-ZSM-5 catalysts contain fixed loading (5 wt%) and variable Fe/Mo ratio. The catalysts were characterized by BET, ICP-AES, HRSEM-EDS, HRTEM, XRD, FTIR, H 2-TPR, NH 3-TPD, and pyridine DRIFT spectroscopy. The characterization data confirmed the existence of Fe and Mo species in the zeolite matrix. With Fe and Mo species implementation to HZSM-5 zeolite, the amount of the acid sites decreased, but the selectivities to C 9+ aromatics increased. The catalyst evaluation was performed at 350 °C for 6 h on-stream at atmospheric pressure using a fixed-bed quartz tube reactor. The selectivity to products of different carbon number was affected by the Fe/Mo ratio within the zeolite. It was found the product distribution of grouped fractions of C 1-C 17+ from the liquid product. The results indicate that the optimum ratio of Fe/Mo is 1-1.5. The highest selectivity for gasoline and distillate ranges was obtained for the 2.5wt%Fe2.5wt% Mo-and 3wt%Fe2wt%Mo-ZSM-5 samples, which was higher than that for parent HZSM-5 catalyst