Optimizing the Aromatic Product Distribution from Catalytic Fast Pyrolysis of Biomass Using Hydrothermally Synthesized Ga-MFI Zeolites
Autor: | Derun Hua, Yujue Wang, Xinning Lu, Jian Li, Xiangyu Li |
---|---|
Rok vydání: | 2019 |
Předmět: |
lcsh:Chemical technology
010402 general chemistry 01 natural sciences Catalysis lcsh:Chemistry chemistry.chemical_compound lcsh:TP1-1185 Physical and Theoretical Chemistry Zeolite Benzene aromatics biomass MFI zeolites gallium catalytic fast pyrolysis 010405 organic chemistry Toluene mfi zeolites Product distribution 0104 chemical sciences lcsh:QD1-999 chemistry Chemical engineering Yield (chemistry) Selectivity Pyrolysis |
Zdroj: | Catalysts; Volume 9; Issue 10; Pages: 854 Catalysts, Vol 9, Iss 10, p 854 (2019) |
ISSN: | 2073-4344 |
DOI: | 10.3390/catal9100854 |
Popis: | A series of gallium-containing MFI (Ga-MFI) zeolites with varying Ga2O3/Al2O3 ratios were synthesized using hydrothermal synthesis and tested as catalyst in catalytic fast pyrolysis (CFP) of beech wood for aromatic production. The results show that the incorporation of Ga slightly reduced the effective pore size of Ga-MFI zeolites compared to conventional HZSM-5 zeolites. Therefore, the Ga-MFI zeolites increased the aromatic selectivity for smaller aromatics such as benzene, toluene, and p-xylene and decreased the aromatic selectivity for bulkier ones such as m-xylene, o-xylene, and polyaromatics in CFP of beech wood relative to HSZM-5. In particular, the yield and selectivity of p-xylene, the most desired product from CFP of biomass, increased considerably from 1.64 C% and 33.3% for conventional HZSM-5 to 2.98−3.34 C% and 72.1−79.6% for the synthesized Ga-MFI zeolites. These results suggest that slightly reducing the pore size of MFI zeolite by Ga incorporation has a beneficial effect on optimizing the aromatic selectivity toward more valuable monoaromatic products, especially p-xylene, during CFP of biomass. |
Databáze: | OpenAIRE |
Externí odkaz: | |
Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |
načítá se...