[en] Electron paramagnetic resonance (EPR) spectroscopy was used to investigate carbonaceous compounds deposited on aluminosilicate mesoporous molecular sieves of the MCM-41 type during conversion of cyclohexene at various temperatures. The amount of the deposited coke grew with the increasing Al content of the catalysts and with the decreasing reaction temperature. The deposits caused a reduction in both the surface area and pore volume of the Al-MCM-41 materials. The measurements showed that the EPR lines were complex. The performed analysis revealed a hyperfine structure the envelope of which was of the Gaussian shape. It was found that the spin concentration increased and the peak-to-peak width (ΔBpp) decreased with the increasing reaction temperature
Journal
No abstract available
Journal
No abstract available
Source
Koter, S.; Koter, I. (eds.); Nicolaus Copernicus University in Torun (Poland); Wroclaw University of Technology, Wroclaw (Poland); University of Technology and Life Sciences, Bydgoszcz (Poland); 384 p; ISBN 978-83-231-2208-1; 
; 2008; p. 258-261; 23. International Symposium on Physico-Chemical Methods of the Mixtures Separation - Ars Separatoria 2008; Torun (Poland); 6-9 Jul 2008; GRANT 32-139/08-DS; Available from Nicolaus Copernicus University in Torun; Also available from Wroclaw University of Technology; Also available from University of Technology and Life Sciences; Also available at http://www.arsseparatoria.chem.uni.torun.pl/2008Symp/contents08.html; 4 refs., 4 figs.
; 2008; p. 258-261; 23. International Symposium on Physico-Chemical Methods of the Mixtures Separation - Ars Separatoria 2008; Torun (Poland); 6-9 Jul 2008; GRANT 32-139/08-DS; Available from Nicolaus Copernicus University in Torun; Also available from Wroclaw University of Technology; Also available from University of Technology and Life Sciences; Also available at http://www.arsseparatoria.chem.uni.torun.pl/2008Symp/contents08.html; 4 refs., 4 figs.
No abstract available
Source
Zajac, W.; Brzezicka, B.; Erbel, D.; Krygowska-Doniec, M.; Mazur, J.; Styczen, J. (eds.); The Henryk Niewodniczanski Institute of Nuclear Physics, Cracow (Poland); 265 p; ISSN 1425-3763; ; 2003; p. 37; Available on http://www.ifj.edu.pl/ANNUAL/annual2002/AR2002.html; 1 fig.
; 2003; p. 37; Available on http://www.ifj.edu.pl/ANNUAL/annual2002/AR2002.html; 1 fig.