Fast pyrolysis of biomass produces a high yield of bio-oil through well-established technologies at optimized temperature, pressure, and residence time of the liberated pyrolysis vapors , . In order to allow processing in oil refineries, further conversion that reduces the oil`s oxygen content and acid number deserve prioritized attention . Deoxygenation can be obtained by catalytic upgrading over solid acid catalysts. A close coupled process operating at temperature and pressure conditions close to those for optimum liquid yields in pyrolysis units offers potential economic advantages for zeolitede oxygenation over high pressure hydrotreating . To date, the medium pore size ZSM-5 zeolite provides a high aromatic yield and the least amount of coke  in upgrading of pyrolysis vapors. The coke caused by reactive pyrolysis vapors may form an envelope covering the zeolite crystals and block the pore mouth entries. The rapid decay in site accessibility requires frequent regeneration to recover activity. In addition, irreversible dealumination can be caused by steam from the pyrolysis process, the dehydration reactions during upgrading and the steam produced during oxidative regeneration. We address the reversible deactivation due to coke by introducing an auxiliary mesopores network to improve the accessibility and prolong the zeolite`s active time on stream. In order to minimize the irreversible deactivation, the zeolites acid site strength and density have to be carefully balanced with additional metal promoters or modification by phosphorous.
|Number of pages||1|
|Publication status||Published - 2018|
|Event||18th Nordic Symposium on Catalysis - Copenhagen, Denmark|
Duration: 26 Aug 2018 → 28 Aug 2018
Conference number: 18
|Conference||18th Nordic Symposium on Catalysis|
|Period||26/08/2018 → 28/08/2018|