TY  - JOUR
AU  - Milovanović, Jelena A.
AU  - Stensrod, Ruth Elisabeth
AU  - Myhrvold, Elisabeth M.
AU  - Tschentscher, Roman
AU  - Stocker, Michael
AU  - Lazarević, Slavica
AU  - Rajić, Nevenka
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3155
AB  - In this work, different metal oxides (MO) supported on two types of zeolites: 1) natural clinoptilolite (NZ) and 2) synthetic zeolite, ZSM-5 were prepared and tested as catalysts in the fast pyrolysis of hardwood lignin. NZ was modified with the CaO and MgO by a simple two steps procedure consisting of an ion exchange reaction and subsequent calcination at 773 K. The synthetic ZSM-5 was modified with several MO species (Ni, Cu, Ca, Mg) by wet impregnation and calcination at 873 K. The prepared catalysts were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy and energy dispersive X-ray analysis (SEM/EDS), and measurement of their specific surface area (BET method). Acid sites were characterized and quantified by pyridine (py) absorption using Fourier transform infrared spectroscopy (FTIR). The catalysts exhibit catalytic activity depending on modification, reaction temperature and of the MO contents. The highest yield of useful phenol in bio-oil was obtained with NiO/ZSM-5 (34.8 wt. %) which exhibits the highest specific surface area and the highest concentration of Bronsted and Lewis acid sites. The studied catalysts did not increase significantly the content of polycyclic aromatic hydrocarbons (PAHs) and 'heavy' compounds (phenols with M-r  gt  164 g mol(-1)) compared to non-catalytic experiment.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Modification of natural clinoptilolite and ZSM-5 with different oxides and a study of the obtained products in lignin pyrolysis
EP  - 729
IS  - 5
SP  - 717
VL  - 80
DO  - 10.2298/JSC310714109M
ER  - 

@article{
author = "Milovanović, Jelena A. and Stensrod, Ruth Elisabeth and Myhrvold, Elisabeth M. and Tschentscher, Roman and Stocker, Michael and Lazarević, Slavica and Rajić, Nevenka",
year = "2015",
abstract = "In this work, different metal oxides (MO) supported on two types of zeolites: 1) natural clinoptilolite (NZ) and 2) synthetic zeolite, ZSM-5 were prepared and tested as catalysts in the fast pyrolysis of hardwood lignin. NZ was modified with the CaO and MgO by a simple two steps procedure consisting of an ion exchange reaction and subsequent calcination at 773 K. The synthetic ZSM-5 was modified with several MO species (Ni, Cu, Ca, Mg) by wet impregnation and calcination at 873 K. The prepared catalysts were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy and energy dispersive X-ray analysis (SEM/EDS), and measurement of their specific surface area (BET method). Acid sites were characterized and quantified by pyridine (py) absorption using Fourier transform infrared spectroscopy (FTIR). The catalysts exhibit catalytic activity depending on modification, reaction temperature and of the MO contents. The highest yield of useful phenol in bio-oil was obtained with NiO/ZSM-5 (34.8 wt. %) which exhibits the highest specific surface area and the highest concentration of Bronsted and Lewis acid sites. The studied catalysts did not increase significantly the content of polycyclic aromatic hydrocarbons (PAHs) and 'heavy' compounds (phenols with M-r  gt  164 g mol(-1)) compared to non-catalytic experiment.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Modification of natural clinoptilolite and ZSM-5 with different oxides and a study of the obtained products in lignin pyrolysis",
pages = "729-717",
number = "5",
volume = "80",
doi = "10.2298/JSC310714109M"
}

Milovanović, J. A., Stensrod, R. E., Myhrvold, E. M., Tschentscher, R., Stocker, M., Lazarević, S.,& Rajić, N.. (2015). Modification of natural clinoptilolite and ZSM-5 with different oxides and a study of the obtained products in lignin pyrolysis. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 80(5), 717-729.
https://doi.org/10.2298/JSC310714109M

Milovanović JA, Stensrod RE, Myhrvold EM, Tschentscher R, Stocker M, Lazarević S, Rajić N. Modification of natural clinoptilolite and ZSM-5 with different oxides and a study of the obtained products in lignin pyrolysis. in Journal of the Serbian Chemical Society. 2015;80(5):717-729.
doi:10.2298/JSC310714109M .

Milovanović, Jelena A., Stensrod, Ruth Elisabeth, Myhrvold, Elisabeth M., Tschentscher, Roman, Stocker, Michael, Lazarević, Slavica, Rajić, Nevenka, "Modification of natural clinoptilolite and ZSM-5 with different oxides and a study of the obtained products in lignin pyrolysis" in Journal of the Serbian Chemical Society, 80, no. 5 (2015):717-729,
https://doi.org/10.2298/JSC310714109M . .

TY  - JOUR
AU  - Rajić, Nevenka
AU  - Zabukovec-Logar, Nataša
AU  - Recnik, Aleksander
AU  - El-Roz, Mohamad
AU  - Thibault-Starzyk, Frederic
AU  - Sprenger, Paul
AU  - Hannevold, Lenka
AU  - Andersen, Anne
AU  - Stocker, Michael
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2406
AB  - In this study the catalytic activity of Na-rich and MO-containing natural clinoptilolite (MO - nanopartides of NiO, ZnO, or Cu2O) was studied in the pyrolysis of hardwood lignin. The clinoptilolite samples exhibit different catalytic activities which depend mainly on the type of the nano-oxide. The presence of nano-oxides did not affect the porosity of the clinoptilolite framework but influenced its acidity. However, it seems that acidity of the lattice did not influence the catalytic activity of the clinoptilolite in the pyrolisis of hardwood lignin. The number of Lewis acid sites increased significantly for the ZnO- and Cu2O-containing clinoptilolite whereas for the NiO-sample it did not change appreciably in comparison to the parent zeolite. The amount of phenols in the as-produced bio-oil varies from 39% for ZnO-clinoptilolite, 43% for Na-rich clinoptilolite, to 50 and 54% for Cu2O- and NiO-containing samples, respectively. The highest yield of phenols obtained in the presence of NiO-containing clinoptilolite is ascribed to a synergetic interaction of the clinoptilolite lattice and nano-NiO particles.
PB  - Elsevier Science Bv, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Hardwood lignin pyrolysis in the presence of nano-oxide particles embedded onto natural clinoptilolite
EP  - 167
SP  - 162
VL  - 176
DO  - 10.1016/j.micromeso.2013.04.005
ER  - 

@article{
author = "Rajić, Nevenka and Zabukovec-Logar, Nataša and Recnik, Aleksander and El-Roz, Mohamad and Thibault-Starzyk, Frederic and Sprenger, Paul and Hannevold, Lenka and Andersen, Anne and Stocker, Michael",
year = "2013",
abstract = "In this study the catalytic activity of Na-rich and MO-containing natural clinoptilolite (MO - nanopartides of NiO, ZnO, or Cu2O) was studied in the pyrolysis of hardwood lignin. The clinoptilolite samples exhibit different catalytic activities which depend mainly on the type of the nano-oxide. The presence of nano-oxides did not affect the porosity of the clinoptilolite framework but influenced its acidity. However, it seems that acidity of the lattice did not influence the catalytic activity of the clinoptilolite in the pyrolisis of hardwood lignin. The number of Lewis acid sites increased significantly for the ZnO- and Cu2O-containing clinoptilolite whereas for the NiO-sample it did not change appreciably in comparison to the parent zeolite. The amount of phenols in the as-produced bio-oil varies from 39% for ZnO-clinoptilolite, 43% for Na-rich clinoptilolite, to 50 and 54% for Cu2O- and NiO-containing samples, respectively. The highest yield of phenols obtained in the presence of NiO-containing clinoptilolite is ascribed to a synergetic interaction of the clinoptilolite lattice and nano-NiO particles.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Hardwood lignin pyrolysis in the presence of nano-oxide particles embedded onto natural clinoptilolite",
pages = "167-162",
volume = "176",
doi = "10.1016/j.micromeso.2013.04.005"
}

Rajić, N., Zabukovec-Logar, N., Recnik, A., El-Roz, M., Thibault-Starzyk, F., Sprenger, P., Hannevold, L., Andersen, A.,& Stocker, M.. (2013). Hardwood lignin pyrolysis in the presence of nano-oxide particles embedded onto natural clinoptilolite. in Microporous and Mesoporous Materials
Elsevier Science Bv, Amsterdam., 176, 162-167.
https://doi.org/10.1016/j.micromeso.2013.04.005

Rajić N, Zabukovec-Logar N, Recnik A, El-Roz M, Thibault-Starzyk F, Sprenger P, Hannevold L, Andersen A, Stocker M. Hardwood lignin pyrolysis in the presence of nano-oxide particles embedded onto natural clinoptilolite. in Microporous and Mesoporous Materials. 2013;176:162-167.
doi:10.1016/j.micromeso.2013.04.005 .

Rajić, Nevenka, Zabukovec-Logar, Nataša, Recnik, Aleksander, El-Roz, Mohamad, Thibault-Starzyk, Frederic, Sprenger, Paul, Hannevold, Lenka, Andersen, Anne, Stocker, Michael, "Hardwood lignin pyrolysis in the presence of nano-oxide particles embedded onto natural clinoptilolite" in Microporous and Mesoporous Materials, 176 (2013):162-167,
https://doi.org/10.1016/j.micromeso.2013.04.005 . .