Hydrogen production over molybdenum loaded mesoporous carbon catalysts in microwave heated reactor system

Guler, Melih
Doğu, Timur
Ammonia decomposition reaction to produce COx free hydrogen over molybdenum incorporated mesoporous carbon based catalysts was studied in a microwave heated reactor system. Mesoporous carbon is acting as the catalyst support as well as the microwave receptor in the reaction medium. While the highest conversion value was 49% in conventionally heated reaction system at 600 degrees C, total conversion value was achieved over the same catalyst at 400 degrees C in microwave heated system with a GHSV of 36,000 ml/hg(cat). Transfer of microwave energy directly to the active particles, volumetric heating and hot spot formation are the main reasons of this great enhancement. While molybdenum nitride was observed under conventional heating, molybdenum carbide was formed in case of microwave application which could be another improving effect on catalytic activity of molybdenum incorporated mesoporous catalysts.


Microwave-assisted ammonia decomposition reaction over iron incorporated mesoporous carbon catalysts
VARIŞLI, DİLEK; Korkusuz, Cansu; Doğu, Timur (2017-02-01)
Microwave-assisted ammonia decomposition reaction was investigated to produce COx free hydrogen, for fuel cell applications. Iron incorporated mesoporous carbon catalysts were prepared at different metal loadings, following an impregnation procedure. Mesoporous carbon acted as the catalyst support, as well as the microwave receptor. Complete conversion of ammonia was achieved at 450 degrees C over the catalyst having 7.7 wt% Fe, when the reaction was carried out in the microwave reactor system, using pure a...
Hydrogen gas production using coupled enzyme systems from E-coli and Halobacterium halobium
Kaya, B; Gündüz, Ufuk; Eroğlu, İnci; Turker, L; Yucel, M (1996-06-28)
A photobioreactor containing enzyme systems from E.coli and Halobacterium halobium for hydrogen gas production was constructed. Bacteriorhodopsin is a retinal protein present in the purple membrane fragment of photosynthetic bacteria H. halobium which behaves as a light driven proton pump upon illumination. The H+ ion gradient produced between interior and exterior of the cell membrane utilized by the bacterial cell for synthesis of ATP as an energy source for its growth and survival. Under anaerobic growth...
Hydrogen production by different strains of Rhodobacter sphaeroides
Gündüz, Ufuk; Yucel, M; Turker, L; Eroglu, L (2000-06-15)
Utilisation of solar energy by photosynthetic microorganisms for H-2 production attracts much interest due to unlimited supply of energy. It is important to identify the most effective strain in terms of hydrogen production for the feasibility of the process. Four different strains of Rhodobacter sp. were grown in a water-jacketed cylindrical glass-column photobioreactor under anaerobic conditions. Growth characteristics and hydrogen production rates were determined. Comparison between strains of Rhodobacte...
Hydrogen generation of conventional fuels over mesoporous mixed oxide catalysts under time interrrupted reaction conditions
Can, Mukaddes; Üner, Deniz; Yılmaz, Ayşen; Department of Chemical Engineering (2012)
In this study, catalytic activity of the Co and/or Pb-SBA-15 mesoporous catalysts in methane partial oxidation reaction was investigated. By using sol-gel, incipient wetness impregnation and post grafting method, SBA-15 samples are incorporated with Co and/or Pb at different weight loadings to provide a controlled geometry in nanometer scale. The characterization of the synthesized samples was done by XRD, N2 adsorption isotherms, FTIR, TEM images, Raman and XPS analysis. In the present study also, gas phas...
Hydrogen bonding in polyanilines
Bahçeci, S.; Toppare, Levent Kamil; Yurtsever, E. (Elsevier BV, 1994-12)
Hydrogen bonding between poly(bisphenol A carbonate) (PC) and polyaniline (PAn) is analyzed using semi-empirical quantum methodology. Fully optimized AM1 molecular orbital calculations are reported for various aniline structures (monomer, dimer and trimer), the monomer of the PC and the hydrogen-bonded model of PAn-PC oligomer.
Citation Formats
M. Guler, T. Doğu, and D. VARIŞLI, “Hydrogen production over molybdenum loaded mesoporous carbon catalysts in microwave heated reactor system,” APPLIED CATALYSIS B-ENVIRONMENTAL, pp. 173–182, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32156.