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Fast Pyrolysis of Technical Lignins in a Circulating Fluidized Bed Reactor

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Fast Pyrolysis of Technical Lignins in a Circulating Fluidized Bed Reactor (Volume 12)

Miika Franck (Author)

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ISBN-13 (Hard Copy) 9783736999657
ISBN-13 (eBook) 9783736989658
Language English
Page Number 168
Lamination of Cover matt
Edition 1.
Book Series SPE-Schriftenreihe
Volume 12
Publication Place Göttingen
Place of Dissertation TU Hamburg
Publication Date 2019-02-25
General Categorization Dissertation
Departments Industrial chemistry and chemical engineering
Mechanical and process engineering
Environmental technology
Keywords lignin, cellulose, hemicellulose, biomass, wood, straw, pyrolysis, char combustion, CFB, circulating fluidized bed, riser reactor, fluidized bed, modeling, energetic analysis, two phase model, reaction kinetics, bed agglomeration, defluidization, mineral matter, product sampling, product composition, granulation, flash-DSC, SEC, GC, SEM
URL to External Homepage https://www.tuhh.de/spe/research/dissertations.html
Description

In search of an alternative for chemicals and energy from fossil fuels, lignin pyrolysis is experimentally investigated in a circulating fluidized bed. Deviation in pyrolysis behavior of a softwood Kraft lignin and a wheat straw hydrolysis lignin is analyzed by means of char morphology as well as overall yield and composition determination for gas, oil, and char. The influence of catalytically active mineral matter in lignin on the product distribution is investigated. Progressively, the fluidized bed pyrolysis process is modeled semi-empirically considering fluid dynamics, feedstock composition, micro-particle pyrolysis reactions and mass balances. The lignin secondary reaction kinetics from oil–to–gas are obtained from the Kraft lignin experimental data and a pyrolysis plant with integrated char and permanent gas combustion is modeled with a flowsheeting tool.