Journal ArticleDOI
Catalytic upgrading of biomass pyrolysis vapors using transition metal-modified ZSM-5 zeolite
E.F. Iliopoulou,Stylianos D. Stefanidis,Konstantinos G. Kalogiannis,Andreas Delimitis,Angelos A. Lappas,Kostas S. Triantafyllidis +5 more
TLDR
In this paper, an equilibrium, commercial diluted ZSM-5 catalyst was used as the base case, in comparison with a series of nickel (Ni) and cobalt (Co) modified variants at varying metal loading.Abstract:
The main objective of the present work was the study of different ZSM-5 catalytic formulations for the in situ upgrading of biomass pyrolysis vapors. An equilibrium, commercial diluted ZSM-5 catalyst was used as the base case, in comparison with a series of nickel (Ni) and cobalt (Co) modified variants at varying metal loading (1–10 wt.%). The product yields and the composition of the produced bio-oil were significantly affected by the use of all ZSM-5 catalytic materials, compared to the non-catalytic flash pyrolysis, producing less bio-oil but of better quality. Incorporation of transition metals (Ni or Co) in the commercial equilibrium/diluted ZSM-5 catalyst had an additional effect on the performance of the parent ZSM-5 catalyst, with respect to product yields and bio-oil composition, with the NiO modified catalysts being more reactive towards decreasing the organic phase and increasing the gaseous products, compared to the Co 3 O 4 supported catalysts. However, all the metal-modified catalysts exhibited limited reactivity towards water production, while simultaneously enhancing the production of aromatics and phenols. An interesting observation was the in situ reduction of the supported metal oxides during the pyrolysis reaction that eventually led to the formation of metallic Ni and Co species on the catalysts after reaction, which was verified by detailed XRD and HRTEM analysis of the used catalysts. The Co 3 O 4 supported ZSM-5 catalysts exhibited also a promising performance in lowering the oxygen content of the organic phase of bio-oil.read more
Citations
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Journal ArticleDOI
Lignocellulosic biomass pyrolysis mechanism: A state-of-the-art review
TL;DR: A broad review of the state-of-the-art biomass pyrolysis research can be found in this article, where three major components (cellulose, hemicellulose and lignin) are discussed in detail.
Journal ArticleDOI
Catalytic fast pyrolysis of lignocellulosic biomass
TL;DR: This review starts with the current understanding of the chemistry in fast pyrolysis of lignocellulose and focuses on the development of catalysts in catalytic fast pyrosynthesis, with the emphasis on bio-oil yields and quality.
Journal ArticleDOI
Recent Advances in Hydrotreating of Pyrolysis Bio-Oil and Its Oxygen-Containing Model Compounds
TL;DR: In this paper, the development of active, selective, and stable hydrotreating catalysts is problematic due to the poor quality of current pyrolysis bio-oil feedstock (i.e., high oxygen content, molecular complexity, coking propensity, and corrosiveness).
Journal ArticleDOI
Recent progress on catalytic pyrolysis of lignocellulosic biomass to high-grade bio-oil and bio-chemicals
G. Kabir,G. Kabir,B.H. Hameed +2 more
TL;DR: In this paper, a review of catalytic pyrolysis of lignocellulose biomass to renewable fuel grade bio-oil and chemicals is presented, along with catalysts type and their catalytic activities in the production of renewable biooil and bio-chemicals.
Journal ArticleDOI
Production of green aromatics and olefins by catalytic cracking of oxygenate compounds derived from biomass pyrolysis: A review
TL;DR: In this article, the effects of catalyst properties and reaction conditions on reaction selectivity toward aromatics and olefins in catalytic cracking of biomass pyrolysis vapors/bio-oil and bio-oil model compounds are reviewed.
References
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Journal ArticleDOI
Synthesis of transportation fuels from biomass: chemistry, catalysts, and engineering.
TL;DR: Hydrogen Production by Water−Gas Shift Reaction 4056 4.1.
Journal ArticleDOI
Determination of integrated molar extinction coefficients for infrared absorption bands of pyridine adsorbed on solid acid catalysts
TL;DR: In this article, the integrated molar extinction coefficients for infrared absorption bands of pyridine adsorbed on acid sites in Si/Al-based catalysts were determined for infrared spectra of five zeolites and two amorphous silica-aluminas.
Journal ArticleDOI
A review of catalytic upgrading of bio-oil to engine fuels
Peter Mølgaard Mortensen,Jan-Dierk Grunwaldt,Peter Arendt Jensen,K.G. Knudsen,Anker Degn Jensen +4 more
TL;DR: In this article, two general routes for bio-oil upgrading have been considered: hydrodeoxygenation (HDO) and zeolite cracking, where zeolites, e.g. HZSM-5, are used as catalysts for the deoxygenization reaction.
Journal ArticleDOI
Biofuels sources, biofuel policy, biofuel economy and global biofuel projections
TL;DR: The use of vegetable oils for making biodiesel due to its less polluting and renewable nature as against the conventional petroleum diesel fuel has been renewed interest in the use of biodiesel.
Journal ArticleDOI
Bio-fuels from thermochemical conversion of renewable resources: A review
TL;DR: In this article, a review of pyrolysis has been presented, where various types of pyrotechnics have been discussed in detail including slow, fast, flash and catalytic processes.