Altering bio-oil composition by catalytic treatment of pinewood pyrolysis vapors over zeolites using an auger - packed bed integrated reactor system

Abstract

Please cite this article as: Guda V.K., Toghiani H. Altering bio-oil composition by catalytic treatment of pine wood pyrolysis vapors over zeolites using an auger -packed bed integrated reactor system. Biofuel Research Journal 11 (2016) HIGHLIGHTSAn integrated reactor system is reported for catalytic pyrolysis of pine wood.Five zeolites with different acidity , pore sizes, and pore structures were studied.Bio-oil composition was a function of catalyst's surface area and pore properties.ZSM-5 in H form, with its shape-selective catalysis, produced best quality bio-oil. Pine wood pyrolysis vapors were catalytically treated using zeolite catalysts. An auger fed reactor was used for the pine wood pyrolysis while a packed bed reactor mounted on the top of the auger reactor housed the catalyst for the treatment of pine wood pyrolytic vapors. The pyrolytic vapors produced at 450 o C were passed through zeolite catalysts maintained at 425 o C at a weight hourly space velocity (WHSV) of 12 h -1 . Five zeolites, including ZSM-5, mordenite, ferrierite, zeolite -Y, and zeolite -beta (all in H form), were used to study the effect of catalyst properties such as acidity, pore size, and pore structure on catalytic cracking of pine wood pyrolysis vapors. Product bio -oils were analyzed for their chemical composition GC-MS , water content, density, viscosity, acid value, pH, and elemental compositions. Thermogravimetric analysis (TGA) was performed to analyze the extent of coking on zeolite catalysts. Application of catalysis to biomass pyrolysis increased gas product yields at the expense of bio-oil yields. While all the zeolites deoxygenated the pyrolysis vapors, ZSM-5 was found to be most effective. The ZSM-5 catalyzed bio-oil, rich in phenolics and aromatic hydrocarbons, was less viscous, had relatively lower acid number and high pH, and possessed oxygen content nearly half that of un-catalyzed bio-oil. Brønsted acidity, pore size, and shape-selective catalysis of ZSM-5 catalyst proved to be the determining factors for its activity. TGA results implied that the pore size of catalysts highly influenced coking reactions. Regeneration of the used catalysts was successfully completed at 700 o C. ARTICLE INFO ABSTRACT © 2016 BRTeam. All rights reserved.Journal homepage: www.biofueljournal.com ( ) Guda and Toghiani / Biofuel Research Journal 11 (2016) [448][449][450][451][452][453][454][455][456][457] Please cite this article as: Guda V.K., Toghiani H. Altering bio-oil composition by catalytic treatment of pine wood pyrolysis vapors over zeolites using an auger -packed bed integrated reactor system.

Transformation of industrial steel slag with different structure-modifying agents for synthesis of catalysts

“…As mentioned above a high surface area and well developed porosity are needed for facilitating access of the molecules to the internal surface and active sites. It is noteworthy, that catalysts for the pyrolysis of biomass contain mainly acid sites [48,49], whereas the slag-based materials are possess not only a large number of acid sites, but also basic ones, which may also affect catalyst efficiency.…”

Influence of Natural and H-Beta Zeolites on Yield and Composition of Non-Polar Fraction of Bio-Oil in Slow Co-Pyrolysis of Biomass and Polypropylene

“…1b, for the case of PP pyrolysis involving natural zeolite gave higher liquid yield compared to that in thermal pyrolysis in which in both pyrolysis, PP underwent random-chain scission [8]. In contrary, for the case of PP pyrolysis involving H-beta zeolite, where the acidity of catalyst was high and end-chain scission was predominant [8,11], the liquid yield was lower compared to that resulted from PP thermal pyrolysis due to the high mass loss as non-condensable gas. For the case of biomass pyrolysis, different types of catalysts nearly did not affect the yield of bio-oil.…”

“…1a shows that higher acidity resulted in higher yield of non-condensable gas. Higher non-condensable yield in biomass pyrolysis using H-beta zeolite compared to that using natural zeolite could occur by the presence of high Bronsted acid sites in the catalyst [11]. Experiment by Aho et al [12] shows that H-beta has tendency to give high yield of non-condensable gas.…”

Performance of Coconut Biodiesel Fueled Diesel Engine with Exhaust Gas Emission Analysis

“…The quest for search of renewable fuels such as biodiesel, has raised since the worlds' fossil fuels reserves are depleting day by day [1,2]. Soon, world's fossil fuel reserves may be extinct as their formations take millions of years [3].…”