Modification of natural clinoptilolite and ZSM-5 with different oxides and a study of the obtained products in lignin pyrolysis

2015
Authors
Milovanović, Jelena A.Stensrod, Ruth Elisabeth
Myhrvold, Elisabeth M.
Tschentscher, Roman

Stocker, Michael
Lazarević, Slavica

Rajić, Nevenka

Article (Published version)
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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 obtaine...d 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.
Keywords:
lignin / catalysts / natural zeolite / ZSM-5 / bio-oil / phenolSource:
Journal of the Serbian Chemical Society, 2015, 80, 5, 717-729Publisher:
- Srpsko hemijsko društvo, Beograd
Funding / projects:
DOI: 10.2298/JSC310714109M
ISSN: 0352-5139
WoS: 000359987400012
Scopus: 2-s2.0-84938935426
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Tehnološko-metalurški fakultetTY - 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 . .