Fast Pyrolysis of Biomass in Bubbling Fluidized Bed: A Model Study

This study proposes a model for the fast pyrolysis of biomass. A reaction scheme of a set of three parallel reactions followed by a set of two parallel reactions has been used to describe the primary and secondary reactions of biomass pyrolysis in a stationary bed reactor. A simple first-order kinetic approach has been applied to predict the product yields. The bed hydrodynamics, the mass transfer between phases and the reaction kinetics have been mathematically formulated. The effects of the operating parameters on the biomass pyrolysis product yield were simulated; the results show that the reaction temperature and nitrogen flow rate plays an important role in the yield of bio-oil. Good agreement between the predicted and measured results was obtained.

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Fast pyrolysis of biomass: A review of relevant aspects. Part I: Parametric study

DYNA ◽

10.15446/dyna.v82n192.44701 ◽

2015 ◽

Vol 82 (192) ◽

pp. 239-248 ◽

Cited By ~ 20

Author(s):

Jorge Ivan Montoya Arbeláez ◽

Farid Chejne Janna ◽

Manuel Garcia-Pérez

Keyword(s):

Reaction Rate ◽

Fast Pyrolysis ◽

Chemical Processes ◽

Biomass Pyrolysis ◽

Promising Alternative ◽

Strongly Coupled ◽

Thermochemical Processes ◽

Energy And Momentum ◽

Pyrolysis Of Biomass ◽

Physical And Chemical

Recent years have witnessed a growing interest in developing biofuels from biomass by thermochemical processes like fast pyrolysis as a promising alternative to supply ever-growing energy consumption. However, the fast pyrolysis process is complex, involving changes in phase, mass, energy, and momentum transport phenomena which are all strongly coupled with the reaction rate. Despite many studies in the area, there is no agreement in the literature regarding the reaction mechanisms. Furthermore, no detailed universally applicable phenomenological models have been proposed to describe the main physical and chemical processes occurring within a particle of biomass. This has led to difficulties in reactor design and pilot industrial scale operation, stunting the popularization of the technology. This paper reviews relevant topics to help researchers gain a better understanding of how to address the modeling of biomass pyrolysis.

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Catalytic fast pyrolysis of biomass: superior selectivity of hierarchical zeolites to aromatics

Green Chemistry ◽

10.1039/c7gc02309j ◽

2017 ◽

Vol 19 (22) ◽

pp. 5442-5459 ◽

Cited By ~ 63

Author(s):

L. Y. Jia ◽

M. Raad ◽

S. Hamieh ◽

J. Toufaily ◽

T. Hamieh ◽

...

Keyword(s):

Mass Transfer ◽

Aromatic Hydrocarbons ◽

Fast Pyrolysis ◽

Biomass Pyrolysis ◽

Hierarchical Zeolites ◽

Catalytic Fast Pyrolysis ◽

Pyrolysis Of Biomass ◽

Zeolite Crystals

Mesopores are “highways” for mass transfer inside zeolite crystals and enhance the formation of mono-aromatic hydrocarbons from biomass pyrolysis.

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Fast Pyrolysis of Biomass Pellets Using Concentrated Solar Radiation: A Numerical Study

Journal of Solar Energy Engineering ◽

10.1115/1.4027266 ◽

2014 ◽

Vol 136 (4) ◽

Cited By ~ 6

Author(s):

Saeed Danaei Kenarsari ◽

Yuan Zheng

Keyword(s):

Solar Radiation ◽

Numerical Study ◽

Fast Pyrolysis ◽

Mountain Pine Beetles ◽

Pyrolysis Products ◽

Pine Trees ◽

Secondary Reactions ◽

Concentrated Solar Radiation ◽

Pyrolysis Of Biomass ◽

Pine Beetles

Since the 1990s, mountain pine beetles have infested mature pine trees in the forests of western North America. Fast pyrolysis is an encouraging method to convert the beetle killed pine trees into bio-oils. In this study, an unsteady-state mathematical model is developed to simulate fast pyrolysis under concentrated solar radiation. Conservation equations of total mass, species, and energy, coupled with the chemical kinetics model, have been developed and solved to simulate fast pyrolysis of cylindrical biomass pellets in a quartz reactor exposed to various radiant heating fluxes. This study demonstrates the importance of the secondary reactions on fast pyrolysis products.

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Multiphase fluid dynamics coupled fast pyrolysis of biomass in a rectangular bubbling fluidized bed reactor: Process intensification

Chemical Engineering and Processing - Process Intensification ◽

10.1016/j.cep.2018.04.028 ◽

2018 ◽

Vol 128 ◽

pp. 180-187 ◽

Cited By ~ 8

Author(s):

Mukesh Upadhyay ◽

Hoon Chae Park ◽

Hang Seok Choi

Keyword(s):

Fluid Dynamics ◽

Fluidized Bed ◽

Fast Pyrolysis ◽

Process Intensification ◽

Fluidized Bed Reactor ◽

Bubbling Fluidized Bed ◽

Multiphase Fluid ◽

Pyrolysis Of Biomass

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Progress of the Pyrolyzer Reactors and Advanced Technologies for Biomass Pyrolysis Processing

Sustainability ◽

10.3390/su131911061 ◽

2021 ◽

Vol 13 (19) ◽

pp. 11061

Author(s):

Mohsin Raza ◽

Abrar Inayat ◽

Ashfaq Ahmed ◽

Farrukh Jamil ◽

Chaouki Ghenai ◽

...

Keyword(s):

Renewable Energy ◽

Circulating Fluidized Bed ◽

Renewable Energy Sources ◽

Fast Pyrolysis ◽

Product Yield ◽

Biomass Pyrolysis ◽

Chemical Route ◽

Slow Pyrolysis ◽

Energy Technologies ◽

Bio Oil

In the future, renewable energy technologies will have a significant role in catering to energy security concerns and a safe environment. Among the various renewable energy sources available, biomass has high accessibility and is considered a carbon-neutral source. Pyrolysis technology is a thermo-chemical route for converting biomass to many useful products (biochar, bio-oil, and combustible pyrolysis gases). The composition and relative product yield depend on the pyrolysis technology adopted. The present review paper evaluates various types of biomass pyrolysis. Fast pyrolysis, slow pyrolysis, and advanced pyrolysis techniques concerning different pyrolyzer reactors have been reviewed from the literature and are presented to broaden the scope of its selection and application for future studies and research. Slow pyrolysis can deliver superior ecological welfare because it provides additional bio-char yield using auger and rotary kiln reactors. Fast pyrolysis can produce bio-oil, primarily via bubbling and circulating fluidized bed reactors. Advanced pyrolysis processes have good potential to provide high prosperity for specific applications. The success of pyrolysis depends strongly on the selection of a specific reactor as a pyrolyzer based on the desired product and feedstock specifications.

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