Lamellar and pillared ZSM-5 zeolites modified with MgO and ZnO for catalytic fast-pyrolysis of eucalyptus woodchips

0462161 - ÚFCH JH 2017 RIV NL eng J - Journal Article
Fermoso, J. - Hernando, H. - Jana, P. - Moreno, I. - Přech, Jan - Ochoa-Hernández, Cristina - Pizzaro, P. - Coronado, J. M. - Čejka, Jiří
Lamellar and pillared ZSM-5 zeolites modified with MgO and ZnO for catalytic fast-pyrolysis of eucalyptus woodchips.
Catalysis Today. Roč. 277, č. 1 (2016), s. 171-181. ISSN 0920-5861. E-ISSN 1873-4308
R&D Projects: GA ČR(CZ) GAP106/12/0189
EU Projects: European Commission(XE) 604307 - CASCATBEL
Institutional support: RVO:61388955
Keywords : lignocellulosic biomass * catalytic fast-pyrolysis * bio-oil
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 4.636, year: 2016

Lamellar and pillared ZSM-5 materials modified with Mg and Zn oxides were synthesized and tested for in-situ catalytic upgrading of eucalyptus woodchips fast-pyrolysis vapors. The introduction of silica pillars into the lamellar ZSM-5 support led to a higher BET area, but also reduced the overall catalyst acidity. The incorporation of MgO and ZnO occurred with a high dispersion over the zeolitic supports, causing also a significant reduction in the value of their textural properties due to a partial blockage of the zeolite pores. Likewise, the acid features of the zeolitic supports underwent sharp changes by the addition of both MgO and ZnO with a strong decrease in the concentration of the Brønsted and Lewis acid sites present in the parent zeolite, as detected by pyridine adsorption followed FTIR spectroscopy. However, additional Lewis acid sites were created associated to the metal oxides deposited onto the zeolitic supports.
Permanent Link: http://hdl.handle.net/11104/0261665