Mild upgrading of biomass pyrolysis vapors via ex-situ catalytic pyrolysis over an iron-montmorillonite catalyst
نویسندگان
چکیده
Pyrolysis vapor upgrading can improve the stability of pyrolysis liquids to facilitate storage, transport, and drop in use as fuels chemical feedstocks existing refining infrastructure. This study investigates a low cost iron based catalyst for mild in-situ fast vapors increase liquid. Iron-doped montmorillonite K10 catalysts were characterized by ICP-OES, BET porosimetry, XRD, XPS, NH3-TPD. The effect three process parameters are evaluated Box-Behnken experimental design using fixed bed. Predictive model equations developed on response surface methodology describe loading, biomass ratio, bed temperature yields liquids, non-condensable gas, coke catalyst. Compared non-catalytic pyrolysis, over reduce liquid gas catalytically cracked into lighter molecules. Liquid yield decreases with C:B ratio while increase. By increasing Fe loading from 0% 10%, coking 11.7% 3.5% yield. Iron 10% is least susceptible coking, but results greater amounts polyaromatics product. According GCMS analysis upgraded have lower concentrations unstable carboxylic acids aldehydes. In addition, formation phenols shift towards fraction alkyl methoxy leading more stable product result upgrading. Overall, iron-doped demonstrated be viable, vapors.
منابع مشابه
Catalytic Upgrading of Biomass Fast Pyrolysis Vapors with Nano Metal Oxides: An Analytical Py-GC/MS Study
Fast pyrolysis of poplar wood followed with catalytic cracking of the pyrolysis vapors was performed using analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The catalysts applied in this study were nano MgO, CaO, TiO2, Fe2O3, NiO and ZnO. These catalysts displayed different catalytic capabilities towards the pyrolytic products. The catalysis by CaO significantly reduced the ...
متن کاملKinetics of biomass catalytic pyrolysis.
The Coats-Redfern method was used to analyze the kinetic characteristics of biomass catalytic pyrolysis, indicating that it can be described by multi-step reactions, rather than as a simple first-order reaction. Friedman model-free calculations were used to describe the starting reaction types and the corresponding initial kinetic parameters. Finally, nonlinear regression of biomass catalytic p...
متن کاملPyrolysis and catalytic upgrading of Citrus unshiu peel.
Ex situ catalytic pyrolysis of Citrus unshiu (C. unshiu) peel was performed using a tandem μ-reactor-GC/MS consisting of two sequential furnaces. The pyrolyzates of C. unshiu peel, composed mainly of alcohols, ketones and furans produced in the 1st furnace of the reactor, were upgraded to aromatics by the use of catalysts in the 2nd furnace. Compared to wood powder, C. unshiu peel produced larg...
متن کاملUpgrading of Pyrolysis Bio-oil: A Review
The increase in the population of the planet and the rapid economic growth and, consequently, the high consumption of energy has created many environmental problems in the globe. Due to these reasons and the lack of renewability of these fossil fuels, there has been a steep trend towards the production of renewable fuels from natural sources, one of which is the production of energy from biomas...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Fuel
سال: 2021
ISSN: ['0016-2361', '1873-7153']
DOI: https://doi.org/10.1016/j.fuel.2021.120226