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Prospective side effects of the heat and mass transfers in micro-porous structure of char during intermediate and final stages of the high-temperature pyrolysis
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology.ORCID iD: 0000-0002-1837-5439
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology.
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2013 (English)In: Nonlinear Phenomena in Complex Systems, ISSN 1561-4085, E-ISSN 1817-2458, Vol. 16, no 3, 287-301 p.Article in journal (Refereed) Published
Abstract [en]

The general problem of a decrease of activation energy for reactions of thermal decomposition in ligno-cellulosic materials in the end of the high-temperature pyrolysis has been discussed. Experiments emphasizing the differences between the starting, intermediate and final stages of the process were conducted. A hypothesis to solve the problem from the point of view of a fundamental fractal theory was formulated. The conclusions of the discussions related to the hypothesis gave a description of new experiments to prove the fundamental theory on diffusion processes with naturally or artificially created conditions for self-organization.

Place, publisher, year, edition, pages
2013. Vol. 16, no 3, 287-301 p.
Keyword [en]
Char, Fractal structure, Micro-porosity, Pyrolysis, Scaling, Self-organization
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-139915Scopus ID: 2-s2.0-84887599022OAI: oai:DiVA.org:kth-139915DiVA: diva2:688312
Note

QC 20140116

Available from: 2014-01-16 Created: 2014-01-15 Last updated: 2017-12-06Bibliographically approved
In thesis
1. Study of pyrolysis and gasification of biomass from the self-organization perspective
Open this publication in new window or tab >>Study of pyrolysis and gasification of biomass from the self-organization perspective
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis focuses on the analysis of kinetics of i) low-temperature pyrolysis of gaseous hydrocarbons, ii) high-temperature steam gasification of char of wood pellets (>700oC), iii) high temperature pyrolysis of straw pellets in an atmosphere of argon and steam, and iv) high temperature pyrolysis of slices of transversally cut wooden sticks. The results of the kinetic measurements in the high-temperature cases are approximated using a least-square based optimization software, which was specially developed to analyse kinetics prone for deviation from the Arrhenius law.In the thesis a general analysis of the researched materials and kinetics of their pyrolysis and gasification is presented from the self-organization perspective. The energy transfer phenomena in both the pyrolysis and gasification processes of biomass are discussed with an emphasis on an analysis of basic phenomena involving the self-organized dynamics on fractal structures in the chosen biomass samples.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2015. vi, 82 p.
Keyword
pyrolisys, pellets, hydrogen, gasification
National Category
Metallurgy and Metallic Materials Energy Engineering Chemical Process Engineering
Research subject
Materials Science and Engineering; Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-162109 (URN)978-91-7595-478-3 (ISBN)
Public defence
2015-04-10, B1, Brinellvägen 23, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Funder
Swedish Research Council
Note

QC 20150324

Available from: 2015-03-24 Created: 2015-03-20 Last updated: 2015-03-31Bibliographically approved

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Yang, Weihong

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